turbo n52 blown engine tear down 14psi find out what broke 🤔
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- Опубликовано: 7 фев 2025
- Engine tear down to see what blew in the turbo n52 hit boost spike a few to many times hitting 16psi spikes 🤷♂️ it happens lol. Let’s see where the weak point was.
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super excited to see how this keeps on progressing, love the content! have an e90 325i and always love to see people pushing the limits on the n52
@@yyskrta thanks I appreciate the positive feedback 👍 this new setup should hit the dyno sometime after Christmas holidays.
Yessir rebuild time 🔥🔥
Thanks for posting mate... Just had my supercharger bracket delivered for my n52, really interesting to see these failure modes, and its not just wrist pins being the weak point. Are you doing anything on your top end?
@@evensisftw top end is all stock besides having fully tunable valvetronic settings as well as boost with my one of one standalone made by popformance other then that stock head studs stock valves and springs. The weak point isint wrist pins or even pistons it’s piston rings when they touch Itill blow out the wrist pin because Itill bind in the cylinder the stock gap in these cars is super tight that’s how I went through 2 motors prior all same issue to much boost piston rings touch each other and part of the piston decides to go swimming in the oil pan. If you boost more then 11psi u gotta gap the rings at the very least I went a bit farther and put in low compression pistons as well so I can run 18-20psi own the new setup it’s just waiting for good weather to hit the dyno.
@@rumrunnersracing Makes a ton of sense mate, nice one for that. Yeah no plans to go beyond 10 pounds lol, will definately want to get that bottom end done looking at this as won't be long till get used to the power :D Looking forward to your dyno results!!!
@ yea buddy I’ll keep u posted I can’t wait to get the new setup dialed in and if you have any questions that u don’t find answers in my other videos feel free to hit me up again in the comments I don’t mind spreading the knowledge good luck on the supercharging 👍
So do you believe that the piston ring needs upgraded just for the ring itself for the n52 in order to run over 14 psi to 19 psi of boost or we can still stick to the stock one that’s fully brand new and we can still run 14 psi to 19psi or boost or do you believe it’s gonna keep blowing up even if you get a brand new stock one
The piston rings need to be gapped for boost in any n/a car you can boost a naturally aspirated car but only low boost as n/a cars run high compression to make power. turbo cars use low compression with boost, The rings being new or not has little to do with anything. When u add boost u add heat to the cylinders and the rings expand with heat. If u add extra heat and pressure in the cylinder without lowering compression or gapping the rings the piston rings will expand and contract in the cylinder like it does but if the piston ring gap isint big enough rings ends touch each other then it binds and snaps off the piston ring land. So more cylinder temps and pressure u add u need more ring gap. long story short low boost 7psi on stock motor is fine with stock rings higher boost needs a bigger ring gap. Boosted cars like lower compression ratios and more ring gap then n/an applications if you want the engine to last. My issue wasent heat it was the high compression ratio with to much boost creeping over 14psi to 16psi ide say 10psi max if you don’t intend on opening the motor and using stock pistons and rings. Any more ur gunna wanna do internal work.
You keep blowing the same cylinder because that corresponding injector is probably clogged/partially clogged, and its running super lean. Suggest having your injectors cleaned and/or buying new injectors
That’s not it the tune was checked it’s fine fueling and timing we’re both set conservative. the issue is without opening the head and gapping the piston rings these motors run to high compression ratio to go anything over 14psi without gapping the piston rings for boost even with a healthy tune. Injectors were flow tested to be good and Theyr genuine Bosch injectors from a porches they were 1100$ for 6. These engines just have weak ring lands it’s the #1 weakest point when trying to make big power with these motors. My issue was wastegate diaphragm was to small turbo was to big at 6500rpm it started to boost creep logs showed it hit 16psi a few times when drifting to close to the limiter and that did it. Plus driving it hard af all the fine didn’t help longevity 😆
@@rumrunnersracing Ok, you should put all this in the video it would make great content, also how about stacking two headgaskets to bring the compression down a bit? my mitsubishi eclipse has a factory 7.8:1 CR and with the right turbo it was very fast, if you bring yours down from 11:1 to like 9:1 maybe that would help. Or maybe aftermarket pistons or pistons from another car that fit the rods, idk lots of dumb ideas
@@alexj.9268 you can buy a thicker head gasket it would lower compression but you don’t know by how much and it makes it more likely to blow the head gasket. But it is a great option if you want to go for the 13-14psi range. Alternatively you can do what I’m doing and get lower compression piston heads I’ll be doing a review on this engine overhaul kit I’m testing. And I can definitely put up a video elaborating on the piston rings 👍
@@rumrunnersracing yes make a video about it, what pistons are lower compression? n51?
@@alexj.9268 I just bought a kit on eBay to get ones made for the n52 I just put up another video it’s the unboxing the link to the kit is in the description