How I Blew Up an 800HP Subaru STI (What’s the Damage)

The art of car restoration and modification can be a complex and often unpredictable process. As demonstrated by the story of Grayson, owner of a Coyote-powered boxer motor, even with seemingly everything in place, something can still go awry. In this particular instance, Grayson had all the necessary components to get his engine running, including spark, fuel, and compression, but somehow, it just wouldn't turn over.

To diagnose the problem, Grayson turned to his trusty blow gun, using it to try and dislodge a potential blockage in one of the cylinders. "I took my blow gun and blew out the cylinder," he explained, hoping that this would help get the engine running. Despite this effort, however, the car remained stubbornly silent. Undeterred, Grayson decided to bring in his friend David for assistance, comparing the boxer motor to a Coyote-powered unit to see if there were any similarities or differences.

As they worked on the car, it became clear that something electrical was amiss. Despite having all the necessary components to get the engine running, including spark and fuel, Grayson's car just wouldn't turn over. "I think there's something electrically wrong," he admitted, scratching his head in frustration. The two friends tried everything from checking the coils for spark to attempting to crank the engine manually, but nothing seemed to be working.

One of the most surprising moments came when Grayson attempted to start the car using a blow gun and some creative problem-solving techniques. "I was gonna post this on YouTube," he joked, as he touched the ignition switch to see if it would turn over. Although this approach didn't ultimately solve the problem, it did provide a humorous moment in an otherwise frustrating day.

As the hours ticked by, Grayson and his friend Justin continued to work on the car, trying everything from checking the fuel system to attempting to get the engine running using a makeshift starter motor. "We tried pretty hard today," Grayson reflected, acknowledging that despite their efforts, the car remained stubbornly silent.

Despite the setbacks, Grayson was determined to get his car running. He took inspiration from a previous experience where he had worked on a transmission for two hours before finally getting it working again. "I thought I fought a transmission for like two hours," he joked, as he continued to work on the engine.

As the day drew to a close, Grayson and Justin decided to take a break and try something new. They brought in a digital multimeter to check the electrical systems of the car, hoping that this might provide some clues about what was going wrong. "I'm gonna get a redemption," Grayson joked, as he set up his equipment to see if they could finally figure out why the car wasn't running.

The final test was a close-run thing, with Grayson and Justin having to coax the engine into life using a combination of gentle prodding and careful manipulation. "It's like turning a key," Grayson joked, as he carefully turned the ignition switch by hand. The result was almost immediate, with the car finally roaring into life.

As the day drew to a close, Grayson reflected on the lessons learned from their experience. "Don't build these cars at home" was his advice to anyone considering taking on a similar project. And yet, despite the setbacks and frustrations, he couldn't help but feel a sense of pride and accomplishment at having finally gotten his car running.

For those interested in restoring or modifying their own vehicles, Grayson offered some words of encouragement. "Make sure to check out offline performance," he recommended, pointing readers to his original formula detail brand, which makes life easy for car owners with products such as a quick-wipe microfiber cloth and a tire shine kit.

Finally, as the article came to a close, Grayson thanked his audience for watching and invited them to share their own experiences and tips in the comments section. With that, he bid farewell to readers, looking forward to seeing what the future holds for his restored Coyote-powered boxer motor.

"WEBVTTKind: captionsLanguage: enhey everybody here at off the line performance with mr grayson he is working on a car you might recognize so i'm here in des moines iowa once again i was only here about a month ago-ish i would say and i was going to review this subaru wrx which had a really cool engine set up in it hybrid setup different setup i've never done before and made 800 wheel and then something happened something really bad happened really bad really bad it blew up the car just blew up i'm sorry i broke your car are you concerned no so while i was gone grayson and the guys here at off the line figured out what exactly happened and it is a very easy thing to do it's not one of those things where it was just random it was premeditated in some ways and it could have been stopped but at the same time things just happen but first we'll let you know what happened and then second we're going to talk about subarus in general and building subarus because off the line are some of the best subaru builders in the country and even they will tell you there are some things that i think a lot of people don't realize goes into it that you probably shouldn't do at home yeah yeah what exactly happened on the faithful day what happened all right so this owner um he brought the car to us to kind of leave it here for a while um because we were having an open house party and obviously it has our graphics all over it so he was gonna let us borrow it for a little while and display it and then david told me that he was coming so um i was like hey let's do a video on this thing we had previously asked the owner we're like hey have you driven it like does it run okay and he goes yep yep runs fine that's fine foreshadowing i honestly think one of my favorite things or edits in the video is when i literally say in the beginning of the video i say my experiences with subarus have been inconsistent and that it's just like foreshadowing long story short this that's what happened that's the main thing that happened but there are other things as well so first things first you can't have a kink in your line like this you cannot because if you think about this you're dealing with low displacement you're also dealing with a lot of cylinder pressure i mean a lot in a boxer format so you have to have the flow be essentially perfect second the fuel pump had settled on time so that means e85 might have gunked up or kicked up in there which made the fuel pump fail which then leans out the motor therefore it broke up well it sounds cool breaking up so i actually love driving supers they're a ton of fun just like how i love driving mitsubishi evos i love them both they're great cars but they have their limits which i have unfortunately found any any professional shop will tell you that every platform has their limits has their finicky things and subarus in particular for example how many places do you need to look at while timing a build super uh it's like six or seven also here's another thing is with the boxer engine and the subaru engines what is the number one thing that you told me was say you have a subaru fail on you and then you try to build it by yourself at home what is the main thing is it the clearances or what is it it's everything so as soon as you take your stock motor and you break the case abs apart right down the middle because that's how you put internals into a subaru you split the block basically as soon as you do that all of your bearing tolerances go right out the window and block has to be a line honed on a machine that i don't have so there's two or three shops in the country that have that machine to do that correctly for this engine for this engine this engine so not like an ls or something where you just throw it back together it's not like an ls or like a 4b11 or something like that where you can take it to your mom and pop machine shop and they can kind of get it done it's not that simple it has to be done by people that have been doing it for many many many many years and the people that we have out front who does the majority of our engines they've been doing it since like 1993 or 1994 or something like that to give you perspective they built very high horsepower sand rails under heavy abuse like heavy abuse yeah i just thought we could open this video by saying these can be complicated yeah and i think a lot of people don't realize that when they go into it it's one thing to take a low displacement four-cylinder platform and build it at your house like a honda or something like that like you see a lot more success stories with that because hondata is user friendly b series are user friendly k series are user friendly when you start turning everything sideways and clearances are different cylinder pressure is different there's a lot that goes on one of my favorite explanations was from jay at real street yeah he came over we were having some issues with the car at texas one year and it was late at night and i looked over at the real street booth and i saw him kind of walking around and he was kind enough to come over and look at the car and give us some insight because jay's you know one of the most a wizard yeah just incredible mind and after he consoled us about you know all the issues that it could be he said there's two issues with this car one of them the car was yellow and then he goes the second one is the pistons go like this yeah let's take a head gasket for example which was the main issue of what happened due to leaning out and overheating so you're putting this all back together is there anything that's super vital or super tricky that people could mess up on their own um torquing the heads down that's a big thing especially with this block this has half inch head studs so we torque the block to depending on how much power we're trying to make with the car anywhere from 100 to 120 foot pounds so it's a lot for six studs that's a lot yeah to distribute all that yeah yeah we didn't open the block we didn't take the heads apart um we just hot swap the head gaskets um yeah unlike what we mentioned earlier yeah which is literally tearing the block down and that's where things get really tricky anytime a block has to be uh re-machined or it needs to have internals put in it it gets put in a box and gets sent out to out front got it and for perspective again they know what they're doing okay like in the video when it broke everyone was like oh my god why would i go to a shop or car brakes i'm like you have not been around modified cars long enough one it's like when you go to a dino day when does a dino day ever go perfect almost never but the thing is is they built the rsti that i reviewed and that thing ran like a freaking champ like i told you 20 minutes ago as soon as you push these cars over 700 the engine becomes a wear item a wear item yeah it's a service item after that here they come grayson they're coming for you yeah keyboards what's the easiest way to change spark plugs on a subaru okay so remove as much as you can no for real like remove the battery remove the washer tank this one's okay it'll be all right but just create as much space as you can and then i use uh the tool that i had in my hand like three minutes ago that i don't know where it is this guy right here i use a spark plug socket and then rather than put an extension because if you put an extension on then you can't get it back out oh i didn't think about it because not enough leverage right yep so now you have to put a socket over your socket so that it slips off that's that's the way that i do it here comes david comparing a boxer motor to a coyote or an ls right now update soaked in fuel absolutely so and and we weren't even cranking on it today so that means there's a fair bit of fuel in there so i'm going to try to get a blow gun down on the cylinder or something like that yeah dustin last time we hung out we were in this car getting towed by a tow strap hopefully not again let's break it yep crank it good that one was 170 170. so let's hope there's not a zero oh gosh we had a zero one time no way zero yep like i like like that piston didn't even exist yeah i think it was like like flicker but he did it and then we were like all right well zero and then went back to we're like we should just double check sure enough zero it was zero literally just it's fine all right grayson what am i doing i'm checking the coils for spark so basically checking the harness and the coils at once good okay this is what i got my college degree for turning a key yeah put it on tape there's no tape son it's the digital hey i'm gonna post this on youtube all right are we doing this yes crank it yeah all right jazz hands up wait wait wait wait first justin touch it yeah i was gonna say we have to touch it yeah touch it because justin if justin touches it it works i'm gonna boop it i thought i fought a transmission for like two hours justin came over done yeah that was sweet i barely cranked it too i only i only did a half a turn real quick yeah yeah there's a lot of fuel in there go ahead do it again yeah i i took my blow gun and blew out the cylinder so hopefully i helped try it again it again it's doing something keep going justin's gonna give it a little bit of throttle do you have a uh a trickle charger with a startup mode yeah plug that baby in optimism is key all right let's do it all right wait that was so close so clutch down floor all the way down yep yep let's see what it does oh that's the closest it's gotten yet that means it's full of fuel yeah do it again just keep it floored yep okay now crank it a little bit and then for it do that again wake up wake up put a little makeup i want you to let me film you why are you no running lucky failure all right hold on let me feel the starter it might be getting a little hot so at the end of the day kind of unfulfilling but it's okay what's the problem grayson i think there's something electrically wrong because it has everything that it needs to run it has spark it has fuel has everything and it has 170 psi of compression which is crazy a lot it's a lot it's enough it's enough for it to it's enough yeah and it won't turn on and i guarantee you as soon as my plane's wheels take off from iowa you'll i'm gonna get a text off that crappy delta wi-fi it'll be like hey it started turn around ask the pilot turn around yeah turn around yeah thankfully ice cream cruise is only in a couple months so i'll probably fly out for that and hopefully we'll get this there you get a redemption maybe we can get a redemption we tried pretty you tried real hard today he did you did a lot of work and yesterday i mean this thing wasn't together last week yeah we assembled i called him last week and he was like they can get it back together so at least give grace in it off the line the credit of getting to this point because the motor wasn't even in the car basically at one point so oh well once again lesson learned don't build these cars at home i think it's a good easy thing to say and yes your buddy magically made 1200 horsepower and daily drives it every single day i know on that note make sure to check out offline performance and i will see you guys next time take it easy have a wonderful day goodbye if you guys like these videos and want to support my channel make sure to head over to patersoncarcare.com it is my original formula detail brand that makes life so easy washing your car everything from cleaning your wheels in just around a minute or any other product that is just as easy to use thanks so much for watching this video and i will see you guys next timehey everybody here at off the line performance with mr grayson he is working on a car you might recognize so i'm here in des moines iowa once again i was only here about a month ago-ish i would say and i was going to review this subaru wrx which had a really cool engine set up in it hybrid setup different setup i've never done before and made 800 wheel and then something happened something really bad happened really bad really bad it blew up the car just blew up i'm sorry i broke your car are you concerned no so while i was gone grayson and the guys here at off the line figured out what exactly happened and it is a very easy thing to do it's not one of those things where it was just random it was premeditated in some ways and it could have been stopped but at the same time things just happen but first we'll let you know what happened and then second we're going to talk about subarus in general and building subarus because off the line are some of the best subaru builders in the country and even they will tell you there are some things that i think a lot of people don't realize goes into it that you probably shouldn't do at home yeah yeah what exactly happened on the faithful day what happened all right so this owner um he brought the car to us to kind of leave it here for a while um because we were having an open house party and obviously it has our graphics all over it so he was gonna let us borrow it for a little while and display it and then david told me that he was coming so um i was like hey let's do a video on this thing we had previously asked the owner we're like hey have you driven it like does it run okay and he goes yep yep runs fine that's fine foreshadowing i honestly think one of my favorite things or edits in the video is when i literally say in the beginning of the video i say my experiences with subarus have been inconsistent and that it's just like foreshadowing long story short this that's what happened that's the main thing that happened but there are other things as well so first things first you can't have a kink in your line like this you cannot because if you think about this you're dealing with low displacement you're also dealing with a lot of cylinder pressure i mean a lot in a boxer format so you have to have the flow be essentially perfect second the fuel pump had settled on time so that means e85 might have gunked up or kicked up in there which made the fuel pump fail which then leans out the motor therefore it broke up well it sounds cool breaking up so i actually love driving supers they're a ton of fun just like how i love driving mitsubishi evos i love them both they're great cars but they have their limits which i have unfortunately found any any professional shop will tell you that every platform has their limits has their finicky things and subarus in particular for example how many places do you need to look at while timing a build super uh it's like six or seven also here's another thing is with the boxer engine and the subaru engines what is the number one thing that you told me was say you have a subaru fail on you and then you try to build it by yourself at home what is the main thing is it the clearances or what is it it's everything so as soon as you take your stock motor and you break the case abs apart right down the middle because that's how you put internals into a subaru you split the block basically as soon as you do that all of your bearing tolerances go right out the window and block has to be a line honed on a machine that i don't have so there's two or three shops in the country that have that machine to do that correctly for this engine for this engine this engine so not like an ls or something where you just throw it back together it's not like an ls or like a 4b11 or something like that where you can take it to your mom and pop machine shop and they can kind of get it done it's not that simple it has to be done by people that have been doing it for many many many many years and the people that we have out front who does the majority of our engines they've been doing it since like 1993 or 1994 or something like that to give you perspective they built very high horsepower sand rails under heavy abuse like heavy abuse yeah i just thought we could open this video by saying these can be complicated yeah and i think a lot of people don't realize that when they go into it it's one thing to take a low displacement four-cylinder platform and build it at your house like a honda or something like that like you see a lot more success stories with that because hondata is user friendly b series are user friendly k series are user friendly when you start turning everything sideways and clearances are different cylinder pressure is different there's a lot that goes on one of my favorite explanations was from jay at real street yeah he came over we were having some issues with the car at texas one year and it was late at night and i looked over at the real street booth and i saw him kind of walking around and he was kind enough to come over and look at the car and give us some insight because jay's you know one of the most a wizard yeah just incredible mind and after he consoled us about you know all the issues that it could be he said there's two issues with this car one of them the car was yellow and then he goes the second one is the pistons go like this yeah let's take a head gasket for example which was the main issue of what happened due to leaning out and overheating so you're putting this all back together is there anything that's super vital or super tricky that people could mess up on their own um torquing the heads down that's a big thing especially with this block this has half inch head studs so we torque the block to depending on how much power we're trying to make with the car anywhere from 100 to 120 foot pounds so it's a lot for six studs that's a lot yeah to distribute all that yeah yeah we didn't open the block we didn't take the heads apart um we just hot swap the head gaskets um yeah unlike what we mentioned earlier yeah which is literally tearing the block down and that's where things get really tricky anytime a block has to be uh re-machined or it needs to have internals put in it it gets put in a box and gets sent out to out front got it and for perspective again they know what they're doing okay like in the video when it broke everyone was like oh my god why would i go to a shop or car brakes i'm like you have not been around modified cars long enough one it's like when you go to a dino day when does a dino day ever go perfect almost never but the thing is is they built the rsti that i reviewed and that thing ran like a freaking champ like i told you 20 minutes ago as soon as you push these cars over 700 the engine becomes a wear item a wear item yeah it's a service item after that here they come grayson they're coming for you yeah keyboards what's the easiest way to change spark plugs on a subaru okay so remove as much as you can no for real like remove the battery remove the washer tank this one's okay it'll be all right but just create as much space as you can and then i use uh the tool that i had in my hand like three minutes ago that i don't know where it is this guy right here i use a spark plug socket and then rather than put an extension because if you put an extension on then you can't get it back out oh i didn't think about it because not enough leverage right yep so now you have to put a socket over your socket so that it slips off that's that's the way that i do it here comes david comparing a boxer motor to a coyote or an ls right now update soaked in fuel absolutely so and and we weren't even cranking on it today so that means there's a fair bit of fuel in there so i'm going to try to get a blow gun down on the cylinder or something like that yeah dustin last time we hung out we were in this car getting towed by a tow strap hopefully not again let's break it yep crank it good that one was 170 170. so let's hope there's not a zero oh gosh we had a zero one time no way zero yep like i like like that piston didn't even exist yeah i think it was like like flicker but he did it and then we were like all right well zero and then went back to we're like we should just double check sure enough zero it was zero literally just it's fine all right grayson what am i doing i'm checking the coils for spark so basically checking the harness and the coils at once good okay this is what i got my college degree for turning a key yeah put it on tape there's no tape son it's the digital hey i'm gonna post this on youtube all right are we doing this yes crank it yeah all right jazz hands up wait wait wait wait first justin touch it yeah i was gonna say we have to touch it yeah touch it because justin if justin touches it it works i'm gonna boop it i thought i fought a transmission for like two hours justin came over done yeah that was sweet i barely cranked it too i only i only did a half a turn real quick yeah yeah there's a lot of fuel in there go ahead do it again yeah i i took my blow gun and blew out the cylinder so hopefully i helped try it again it again it's doing something keep going justin's gonna give it a little bit of throttle do you have a uh a trickle charger with a startup mode yeah plug that baby in optimism is key all right let's do it all right wait that was so close so clutch down floor all the way down yep yep let's see what it does oh that's the closest it's gotten yet that means it's full of fuel yeah do it again just keep it floored yep okay now crank it a little bit and then for it do that again wake up wake up put a little makeup i want you to let me film you why are you no running lucky failure all right hold on let me feel the starter it might be getting a little hot so at the end of the day kind of unfulfilling but it's okay what's the problem grayson i think there's something electrically wrong because it has everything that it needs to run it has spark it has fuel has everything and it has 170 psi of compression which is crazy a lot it's a lot it's enough it's enough for it to it's enough yeah and it won't turn on and i guarantee you as soon as my plane's wheels take off from iowa you'll i'm gonna get a text off that crappy delta wi-fi it'll be like hey it started turn around ask the pilot turn around yeah turn around yeah thankfully ice cream cruise is only in a couple months so i'll probably fly out for that and hopefully we'll get this there you get a redemption maybe we can get a redemption we tried pretty you tried real hard today he did you did a lot of work and yesterday i mean this thing wasn't together last week yeah we assembled i called him last week and he was like they can get it back together so at least give grace in it off the line the credit of getting to this point because the motor wasn't even in the car basically at one point so oh well once again lesson learned don't build these cars at home i think it's a good easy thing to say and yes your buddy magically made 1200 horsepower and daily drives it every single day i know on that note make sure to check out offline performance and i will see you guys next time take it easy have a wonderful day goodbye if you guys like these videos and want to support my channel make sure to head over to patersoncarcare.com it is my original formula detail brand that makes life so easy washing your car everything from cleaning your wheels in just around a minute or any other product that is just as easy to use thanks so much for watching this video and i will see you guys next time\n"