**DIAMond Build: Overkill and Perfection**

When it comes to building an engine, there's always that nagging feeling that you might have missed something crucial. For me, that feeling was always present when I worked on my RB25 engine, particularly with regards to the intake manifold gasket. It seemed like no matter what I did, water would still leak into the engine and cause more problems than it was worth. That's why I've made a conscious decision to go overkill on this build - to ensure that every aspect of the engine is perfect.

As I sit here in front of my workbench, surrounded by tools and parts, I feel a sense of excitement and trepidation. This build is going to be different from all my previous endeavors, not just because of the materials and components used, but also because of the sheer amount of planning and preparation that's gone into it. From the silicone seals on the intake manifold gasket to the carefully selected DKS 1500C top-feed injectors, every detail has been considered with the utmost care.

**The DKS 1500C Top-Feed Injectors**

One of my favorite features of this build is the selection of DKS 1500C top-feed injectors. I've used these same injectors in my S13 for years now, and I can confidently say that they're some of the best money can buy. They offer a great balance between power and fuel efficiency, making them an ideal choice for this build. And with the DW400 pump, which is essentially a single intake pump, we've managed to get plenty of power out of it - over 500 horsepower, in fact.

**The RB25 Engine: A Familiar yet Exciting Build**

When I first started working on my RB25 engine, I knew that I was going to have to do things differently. The engine is a classic, but it's also notoriously temperamental. That's why I've opted for an overkill approach, incorporating features like the water jacket in the intake manifold gasket to prevent leaks and ensure optimal performance. And with the Rtech Performance cast manifold, which is designed specifically for Garrett V-bands, this build is going to be a real showstopper.

**The Rtech Performance Cast Manifold**

I'm extremely excited about the Rtech Performance cast manifold, particularly because it's the first prototype of its kind that I've ever had access to. The company from Australia has done an incredible job in designing and building this manifold, taking into account factors like wastegate placement and turbo positioning to create a truly unique and innovative design. And with its 347 grade stainless steel construction and 3 mil thickness, it's clear that they've put a lot of thought into creating something truly special.

**Turbo: The G25 550 on the RB25 Engine**

Of course, no build would be complete without a turbocharger. For this engine, I've opted for the G25 550, which is literally my favorite turbo in the entire world. This thing feels like a V8 at full throttle - it's mind-blowing. And with its variable cam timing, we're expecting to see some truly incredible performance out of this build.

**Final Thoughts**

As I take a step back and look over the build, I feel a sense of pride and satisfaction. This engine is going to be special, not just because of its performance capabilities, but also because of the care and attention that's gone into every detail. Whether it's the silicone seals on the intake manifold gasket or the carefully selected DKS 1500C top-feed injectors, every aspect of this build has been thoughtfully considered.

For me, this build is all about perfection - a perfect blend of power, performance, and style. And with the Rtech Performance cast manifold and G25 550 turbocharger leading the charge, I'm confident that we've created something truly special here at Drift HQ.

"WEBVTTKind: captionsLanguage: enwelcome to today's video guys this is a very exciting piece of the SR puzzle you guys know my friend Mike over at New JDM has helped us out with a lot of vapor honing stuff and zinc plating on all the bolts and stuff but this is the first time I've add him do a complete restoration on a piece uh it's something that he does often for his clients in this case it's the exact same intake manifold as this that came off the other engine I told him to give me the works I'm excited to see it look at this oh assembled and everything too God damn now don't mind the fuel rail I'm not using this fuel rail that's why I told him not to worry about it but this is some Next Level right here yoan check this out D that's really clean I'm so excited God this looks amazing we need to be able to do vapor owning here yeah I know a guy in Connecticut that we could probably steal one from sometimes I heard he leaves it in his driveway oh really yeah I heard he got a new place too yep you could just real big driveway to leave sr20s ince it's starting to take this thing apart hopefully I'll start to get the new one on today even though I'm waiting on a few little gaskets so happy this engine's clean this might be like a really bad thing to do but I've done it on many alternators and they've always still worked so hopefully I didn't just jinx myself but it it's better than paint on alternator and it shines it up pretty quick just hit it with wire wheel and yeah very good a bad you want to know one of the biggest secrets to restoring cars that I learned from Tommy the biggest secret that we struggled with with the R34 is having a core now that we have economies of scale with sr20s as I pull something off if I have three things that look very similar it's not a guessing game of which one it is I simply match it go okay that's the one I have the nut I go okay that's the one I have the bolt okay that's the one C clip boom just like that you could be really dumb and still figure it out just like me I'm really regretting not putting this thing on an engine stand I thought it was going to save time but now I'm just working like a puddle of coolant big brain move now take bracket off wouldn't you know new oh feel like I've said this 700 times but in case you're joining us in this video this whole turbo manifold and uh turbo setup it's a Gen 2 2871 which is actually a really good turbo for an Sr a little bit big compared to what I like um but will be perfect for a stock Rod bottom end so I'm going to basically boop boop put it on the other engine I might keep this manifold I might not looks like it's been cracked and rewelded one time so uh probably not the best idea to do it maybe I'll get a new one from ISR or something but going to pull this Johnny off and this thing is getting the top M I'm really torn cuz I it'd be cool to keep it stock and have everything bolt right back up but at the same time if I can put a G25 on this thing too it's like the best turbo ever for SRS ooh and they have the one that bolts right in the stock location I should def definitely do that I haven't tried one of those yet this would be a cool car to try it on welcome to another boring video at sr20s absolutely the best engine ever okay uh the goal is to get the intake manifold on today but before we do that uh we're going to be doing a little bit of coolant line simplification for whatever reason it's a lot more confusing in s 14 and it isn't an s13 and I'll kind of show you why when we put the intake manold on had to reach out to my boy samit other than him about my rocker arms he did give us some good helpful advice uh what they essentially did on okach Chan's race car um this is a piece that attaches kind of like this and this is one of the water lines that we'll be able to delete uh this to my understanding is kind of just like one of the extra lines to feed through the heater core when the thermostat isn't open so it's not blocked completely but it's getting deleted sorry Mr zinc so I'm going to put this out and then Johan is going to yeah it's kind of pain he going to weld that up yeah very strong boy I'm a man yo very strong boy I'm offended I just smack you on in the face I worry about it's my hand oh look at that so what's playing Just well beads yeah just play the Beat Around the the circle and the Beats meet together in the center cool y yep nice new new JDM old JDM you could sell that for like $50 I know I was thinking about leaving in my driveway and see if someone takes it number two that's getting plugged uh actually comes out on the front of the intake manifold um there's a little coolant passage that comes from the head it's important to still let that flow but this guy just went to the throttle body warmer that would bump idle up a little bit when the car is cold uh the whole idea of this is to just delete any possible leaks cuz they're annoying to fix on the side of the road um and could cost you an engine today's project is to get both the intake and exhaust manifold on uh before I mount the intake manifold I'm starting to mock up everything uh what I'll be using on this build is radium's S14 Sr fuel rail so you guys know I love radium stuff they have a really nice quality product everything is really nice finish and very thoughtfully engineered uh what I like about this so much is it comes with a kit obviously you go to top feed to accommodate the D injectors that we're going to be running but what I think I'm the most hyped about is an option was an add-on fuel pressure regulator that is direct Mount so we're going to avoid having to run lines from the fuel rail to a fuel pressure regulator that is mounted somewhere in the engine bay and this kit comes with nice little swivel fittings for both the exit of the fuel rail which will be coming through the fuel pressure regulator and for the fuel pressure regulator itself in case you need to clock it or anything um but I'm just kind of mocking everything up now trying to figure out how I'm going to Route the fuel lines before I mount the intake manifold Cas I'm going to go under or over but Johan's pretty much done with welding all the coolant delete stuff so it's almost time for me to finally Mount this so this is kind of how everything will lay uh originally I wanted to put this on the front but in terms of clearance between the VCT stuff and then all these lines it's going to be a little tight so what I'm going to try to do is run the feed kind of underneath it with a 180 fitting here drift HQ should have one over there so dorte is going to go see if he can grab one for me so I can start mocking that up but the problem comes into play with a top mount conversion on this setup with your whole iak stuff so this thing is going to hit I'll show you just for illustrative purposes look at that I don't even need to put it on you can see yeah it going to hit so what we do we take it off and radium sells a IA spacer so what this does is it basically deletes the need to use this and spaces out the iak for clearance so that's what I'm going to do right now Mike over at new JDM did a really job zinc coating all this stuff that we're about to take off I might see if I can just trim this bracket so I can still retain these two little vacuum lines cuz I like how they look and it'll be a little bit nicer than having to go underneath the intake manifold and use this stuff but for now we're just going to remove it make sure we don't have any interference not should really replace these lines anyway they're very old in rubber hopefully it'll make more sense when I pull this off okay it does so this comes from this pass passage which is probably the release of the iak where it like lets air bleed out I guess that makes sense and then that would probably I guess go back in an intake or something where this will essentially block that off see doesn't let it through and then instead it'll come out of this Barb right here very smart very clever radium comes with a little gasket pop that boy on we'll seal her up with paper gaskets Permatex makes a little spray gasket sealant you guys have seen us use this before just kind of helps make sure you get a good seal there that then goes this guy I don't know who's going to stick there in place you s going to replace the exhaust manifold studs these ones actually seem to be cooperating quite a bit so they might have already been replaced ones but even though the manifold I'm using it'll be really easy to service I still rather do this once than have to do it because one breaks not good at applying RTV to stuff and SR20 will teach you how every single thing y'all LS nerds and you're ready to go gaskets from AutoZone you don't know the struggle looks a little F but it came out great this is going to simplify everything a bunch there'll be no more heater lines it l just be one line that goes from this to the bottom of the intake manifold boom done uh only other thing that really needs to go on down here I have like a mission Moto sandwich plate for the uh oil filter so I can get oil cooler lines um but other than that I think I'm pretty much ready to put the intake manifold on I just wanted to make sure we had all this stuff down here tidy first just so uh nothing gets forgotten about I'm real good at like half tightening things and forgetting about them so trying to not do that on this not 100% sure if I need to do this but really doing diams yeah dude come on get a nice even spread there's a water jacket in the intake manifold gasket if you guys remember my wos of my rb25 life where I just kept leaking water all the time from that we don't want that so we're just going to go a little Overkill and put silicone in there right John see as I said before a lot of this build is just kind of using what I know and I've learned over time we're going with the same tried and true dks 1500c top feed injectors uh these are the same injectors that hav run my s13 for years now along with the dw400 pump just one single intank pump makes plenty of power over 500 on ethanol no need for surge tanks or crazy dual pump setups just keeping it simple cuz that's kind of the premise with this build but anyway I'm going to use some of their uh Super Lube that they include Lube up the O-rings on the seats then start to pop the injectors and the fuel rail on so I can get that upper half the intake man a fold all it up like a glove cooperate please hope this isn't the harder side usually there's one side that's harder why you look at me you do the thing so I film the thing all right this engine is getting an extremely special manifold uh you've probably never seen anything like this before because this this is the very first prototype version that I am gratefully using so there's a company from Australia called rtech performance and they're basically trying to reinvent the wheel with these cast manifolds by taking like a tubular design and making an extremely goodlooking thoughtful designed and well flowing manifold but the coolest thing is they're all built around Garrett v-bands they have like a vband system with like different adapters to mount any turbo so you don't need to hack the flange off and weld them but I'm excited because I have cracked actually quite a few manifolds on SR STS both low mounts and top mounts the low Mount from this one has already been cracked and welded a few times I might not even put this back on the engine I might just uh see if I can get another one but drift HQ is going to be one of the first places to get these in our hands uh we'll have them for sale later this year but this is technically the beta version right now they're 347 grade stainless they're about 3 mil thick which is pretty much the same as most tubular manifolds and obviously I don't have the turbo on right now so I can't comment on it but this wastegate placement and where the turbo placement is is supposed to be the ideal placement for a lot of different builds um it's not exactly an equal length Runner so I'm not too sure what it's going to sound like the equal length kind of makes mine sound raspy and like uh almost like a rotary um it'd be cool if this was somewhere in between kind of like a low Mount growl and a top mount rasp but uh we'll see I'm going to mock this up right now and they are also making a lot of other really cool cast manifolds for like JZ RB and we'll be the first to get in our hands on them at drift HQ so if you guys have any questions or if you want to reserve one because the first batch is going to be on the smaller side just let us know so we'll be reusing my favorite turbo in the entire world the G25 550 on this thing cool thing with the manifold placement dip stick doesn't need to be bent or relocated uh I have to do that on my s13 and it's really annoying because it never wants to like come out right but this turbo um it comes on if I remember correctly somewhere between like 3,800 and 4 Grand but that's without variable cam timing so I'm excited to see what it feels like with this but what I love about it so much and it felt the same way in the JZ is that once you're in boost if you're like anywhere over 4 grand the transient response is like mindblowing you you barely even need a clutch kick just on off throttle it feels like a V8 and it is mindboggling and it is my favorite turbo in the world and I am super excited to run it on many more SRS in the future uh literally my favorite engine to drive ever is that car but it's just so sentimental to me that I don't let myself drive it and I'm going to get to drive all the time win-win don't leave for me very strong boy I'm a man y very strong boy I'm offended you in the facewelcome to today's video guys this is a very exciting piece of the SR puzzle you guys know my friend Mike over at New JDM has helped us out with a lot of vapor honing stuff and zinc plating on all the bolts and stuff but this is the first time I've add him do a complete restoration on a piece uh it's something that he does often for his clients in this case it's the exact same intake manifold as this that came off the other engine I told him to give me the works I'm excited to see it look at this oh assembled and everything too God damn now don't mind the fuel rail I'm not using this fuel rail that's why I told him not to worry about it but this is some Next Level right here yoan check this out D that's really clean I'm so excited God this looks amazing we need to be able to do vapor owning here yeah I know a guy in Connecticut that we could probably steal one from sometimes I heard he leaves it in his driveway oh really yeah I heard he got a new place too yep you could just real big driveway to leave sr20s ince it's starting to take this thing apart hopefully I'll start to get the new one on today even though I'm waiting on a few little gaskets so happy this engine's clean this might be like a really bad thing to do but I've done it on many alternators and they've always still worked so hopefully I didn't just jinx myself but it it's better than paint on alternator and it shines it up pretty quick just hit it with wire wheel and yeah very good a bad you want to know one of the biggest secrets to restoring cars that I learned from Tommy the biggest secret that we struggled with with the R34 is having a core now that we have economies of scale with sr20s as I pull something off if I have three things that look very similar it's not a guessing game of which one it is I simply match it go okay that's the one I have the nut I go okay that's the one I have the bolt okay that's the one C clip boom just like that you could be really dumb and still figure it out just like me I'm really regretting not putting this thing on an engine stand I thought it was going to save time but now I'm just working like a puddle of coolant big brain move now take bracket off wouldn't you know new oh feel like I've said this 700 times but in case you're joining us in this video this whole turbo manifold and uh turbo setup it's a Gen 2 2871 which is actually a really good turbo for an Sr a little bit big compared to what I like um but will be perfect for a stock Rod bottom end so I'm going to basically boop boop put it on the other engine I might keep this manifold I might not looks like it's been cracked and rewelded one time so uh probably not the best idea to do it maybe I'll get a new one from ISR or something but going to pull this Johnny off and this thing is getting the top M I'm really torn cuz I it'd be cool to keep it stock and have everything bolt right back up but at the same time if I can put a G25 on this thing too it's like the best turbo ever for SRS ooh and they have the one that bolts right in the stock location I should def definitely do that I haven't tried one of those yet this would be a cool car to try it on welcome to another boring video at sr20s absolutely the best engine ever okay uh the goal is to get the intake manifold on today but before we do that uh we're going to be doing a little bit of coolant line simplification for whatever reason it's a lot more confusing in s 14 and it isn't an s13 and I'll kind of show you why when we put the intake manold on had to reach out to my boy samit other than him about my rocker arms he did give us some good helpful advice uh what they essentially did on okach Chan's race car um this is a piece that attaches kind of like this and this is one of the water lines that we'll be able to delete uh this to my understanding is kind of just like one of the extra lines to feed through the heater core when the thermostat isn't open so it's not blocked completely but it's getting deleted sorry Mr zinc so I'm going to put this out and then Johan is going to yeah it's kind of pain he going to weld that up yeah very strong boy I'm a man yo very strong boy I'm offended I just smack you on in the face I worry about it's my hand oh look at that so what's playing Just well beads yeah just play the Beat Around the the circle and the Beats meet together in the center cool y yep nice new new JDM old JDM you could sell that for like $50 I know I was thinking about leaving in my driveway and see if someone takes it number two that's getting plugged uh actually comes out on the front of the intake manifold um there's a little coolant passage that comes from the head it's important to still let that flow but this guy just went to the throttle body warmer that would bump idle up a little bit when the car is cold uh the whole idea of this is to just delete any possible leaks cuz they're annoying to fix on the side of the road um and could cost you an engine today's project is to get both the intake and exhaust manifold on uh before I mount the intake manifold I'm starting to mock up everything uh what I'll be using on this build is radium's S14 Sr fuel rail so you guys know I love radium stuff they have a really nice quality product everything is really nice finish and very thoughtfully engineered uh what I like about this so much is it comes with a kit obviously you go to top feed to accommodate the D injectors that we're going to be running but what I think I'm the most hyped about is an option was an add-on fuel pressure regulator that is direct Mount so we're going to avoid having to run lines from the fuel rail to a fuel pressure regulator that is mounted somewhere in the engine bay and this kit comes with nice little swivel fittings for both the exit of the fuel rail which will be coming through the fuel pressure regulator and for the fuel pressure regulator itself in case you need to clock it or anything um but I'm just kind of mocking everything up now trying to figure out how I'm going to Route the fuel lines before I mount the intake manifold Cas I'm going to go under or over but Johan's pretty much done with welding all the coolant delete stuff so it's almost time for me to finally Mount this so this is kind of how everything will lay uh originally I wanted to put this on the front but in terms of clearance between the VCT stuff and then all these lines it's going to be a little tight so what I'm going to try to do is run the feed kind of underneath it with a 180 fitting here drift HQ should have one over there so dorte is going to go see if he can grab one for me so I can start mocking that up but the problem comes into play with a top mount conversion on this setup with your whole iak stuff so this thing is going to hit I'll show you just for illustrative purposes look at that I don't even need to put it on you can see yeah it going to hit so what we do we take it off and radium sells a IA spacer so what this does is it basically deletes the need to use this and spaces out the iak for clearance so that's what I'm going to do right now Mike over at new JDM did a really job zinc coating all this stuff that we're about to take off I might see if I can just trim this bracket so I can still retain these two little vacuum lines cuz I like how they look and it'll be a little bit nicer than having to go underneath the intake manifold and use this stuff but for now we're just going to remove it make sure we don't have any interference not should really replace these lines anyway they're very old in rubber hopefully it'll make more sense when I pull this off okay it does so this comes from this pass passage which is probably the release of the iak where it like lets air bleed out I guess that makes sense and then that would probably I guess go back in an intake or something where this will essentially block that off see doesn't let it through and then instead it'll come out of this Barb right here very smart very clever radium comes with a little gasket pop that boy on we'll seal her up with paper gaskets Permatex makes a little spray gasket sealant you guys have seen us use this before just kind of helps make sure you get a good seal there that then goes this guy I don't know who's going to stick there in place you s going to replace the exhaust manifold studs these ones actually seem to be cooperating quite a bit so they might have already been replaced ones but even though the manifold I'm using it'll be really easy to service I still rather do this once than have to do it because one breaks not good at applying RTV to stuff and SR20 will teach you how every single thing y'all LS nerds and you're ready to go gaskets from AutoZone you don't know the struggle looks a little F but it came out great this is going to simplify everything a bunch there'll be no more heater lines it l just be one line that goes from this to the bottom of the intake manifold boom done uh only other thing that really needs to go on down here I have like a mission Moto sandwich plate for the uh oil filter so I can get oil cooler lines um but other than that I think I'm pretty much ready to put the intake manifold on I just wanted to make sure we had all this stuff down here tidy first just so uh nothing gets forgotten about I'm real good at like half tightening things and forgetting about them so trying to not do that on this not 100% sure if I need to do this but really doing diams yeah dude come on get a nice even spread there's a water jacket in the intake manifold gasket if you guys remember my wos of my rb25 life where I just kept leaking water all the time from that we don't want that so we're just going to go a little Overkill and put silicone in there right John see as I said before a lot of this build is just kind of using what I know and I've learned over time we're going with the same tried and true dks 1500c top feed injectors uh these are the same injectors that hav run my s13 for years now along with the dw400 pump just one single intank pump makes plenty of power over 500 on ethanol no need for surge tanks or crazy dual pump setups just keeping it simple cuz that's kind of the premise with this build but anyway I'm going to use some of their uh Super Lube that they include Lube up the O-rings on the seats then start to pop the injectors and the fuel rail on so I can get that upper half the intake man a fold all it up like a glove cooperate please hope this isn't the harder side usually there's one side that's harder why you look at me you do the thing so I film the thing all right this engine is getting an extremely special manifold uh you've probably never seen anything like this before because this this is the very first prototype version that I am gratefully using so there's a company from Australia called rtech performance and they're basically trying to reinvent the wheel with these cast manifolds by taking like a tubular design and making an extremely goodlooking thoughtful designed and well flowing manifold but the coolest thing is they're all built around Garrett v-bands they have like a vband system with like different adapters to mount any turbo so you don't need to hack the flange off and weld them but I'm excited because I have cracked actually quite a few manifolds on SR STS both low mounts and top mounts the low Mount from this one has already been cracked and welded a few times I might not even put this back on the engine I might just uh see if I can get another one but drift HQ is going to be one of the first places to get these in our hands uh we'll have them for sale later this year but this is technically the beta version right now they're 347 grade stainless they're about 3 mil thick which is pretty much the same as most tubular manifolds and obviously I don't have the turbo on right now so I can't comment on it but this wastegate placement and where the turbo placement is is supposed to be the ideal placement for a lot of different builds um it's not exactly an equal length Runner so I'm not too sure what it's going to sound like the equal length kind of makes mine sound raspy and like uh almost like a rotary um it'd be cool if this was somewhere in between kind of like a low Mount growl and a top mount rasp but uh we'll see I'm going to mock this up right now and they are also making a lot of other really cool cast manifolds for like JZ RB and we'll be the first to get in our hands on them at drift HQ so if you guys have any questions or if you want to reserve one because the first batch is going to be on the smaller side just let us know so we'll be reusing my favorite turbo in the entire world the G25 550 on this thing cool thing with the manifold placement dip stick doesn't need to be bent or relocated uh I have to do that on my s13 and it's really annoying because it never wants to like come out right but this turbo um it comes on if I remember correctly somewhere between like 3,800 and 4 Grand but that's without variable cam timing so I'm excited to see what it feels like with this but what I love about it so much and it felt the same way in the JZ is that once you're in boost if you're like anywhere over 4 grand the transient response is like mindblowing you you barely even need a clutch kick just on off throttle it feels like a V8 and it is mindboggling and it is my favorite turbo in the world and I am super excited to run it on many more SRS in the future uh literally my favorite engine to drive ever is that car but it's just so sentimental to me that I don't let myself drive it and I'm going to get to drive all the time win-win don't leave for me very strong boy I'm a man y very strong boy I'm offended you in the face\n"