#63868, "Finally found out what happened when I blew my motor"
Well for you guys that have been on here awhile or ever paid attention to my sig, I blew my motor on the dyno about 2 years ago when I asked the guy to turn up the boost from 4 1/2psi to 8psi. The first time it was at 6psi, then 10 1/2psi then turned it down and still hit 10 1/2 psi then finally went down to about 8psi but it was to late. On those two runs hitting 10 1/2psi I had a lot of oil coming out of my breather and I needed a new motor or I could rebuilt my own. Someone on here was ready to buy my turbo kit so I bought a stock motor and I had the motors switched and the turbo kit taken off. During that process the guy changes his mind saying he has no $ but buys another turbo kit a couple days later so I put the turbo kit back on another stock motor when I would of just done a Howell rebuild. Anyways I sold that motor to Corbin this past weekend and he just took it apart and told me I cracked the ring lands in cylinder #1 and #4, which I had guessed happened since my compression sucked in those cylinders but now I know for sure. Just thought I'd share what happened after all of this time. -Dave
2009 Corolla S - waiting until 2012 for my next toy! *SOLD* 1992 3000GT VR4 - pearl white and 45,6xx miles! *SOLD* 2007 Subaru Legacy GT sedan *SOLD* 95 Mitsubishi 3000GT VR4 - BPU *SOLD* 97 Eclipse GS Star Stage 2
nothing like driving with the windows down and the music low: i love hearing the turbo spool, swwwhhhttt!!!! thanks for www.kaptainmyke.com for the sig hosting
#63887, "RE: Finally found out what happened when I blew my motor" In response to Reply # 3
So basically a stock block is only good for around 8psi. What cause the ring lands to crack?? The high cylinger pressure, detonation, lean?? I was told that the rods are the weakest point, but it seems like the ring lands are the weakest.
#63897, "RE: Finally found out what happened when I blew my motor" In response to Reply # 4
Statistically on this board, it seems blown motors--cracked ringlands and/or piston--occur between 8-10 psi. I guess our stock piston just can handle that much boost:shrug
___________ Kon C
"Sometimes, a man has to do what a man has to do."
#63901, "RE: Finally found out what happened when I blew my motor" In response to Reply # 6
i thought the pistons/rings/ringlands are what can't handle much boost there are a few here (can't remember names) who are running between 14-20psi on stock rods with upgraded pistons and rings and such...
but once again im a noob dont take anything i say too seriously lol
#63908, "RE: Finally found out what happened when I blew my motor" In response to Reply # 8
Originally posted by flamineclipse How do the stock rods hold up with forged pistons?
Some people get forged pistons, new rings and get the stock rods shot-penned (sp?) Supposedly our rods can handle about 300-350WHP but it varies from car to car. We might all have 420A's but none of us have the 420A in the same condition. Everyones car is different. I was turbo'ed for 3 months and blew my motor while Corbin has been turbo'ed for liekk 4 years or more even on the stock bottom end. It's a little luck along w/ not being greddy and saying around 6-8psi intercooled w/ a decent fuel setup. -Dave
2009 Corolla S - waiting until 2012 for my next toy! *SOLD* 1992 3000GT VR4 - pearl white and 45,6xx miles! *SOLD* 2007 Subaru Legacy GT sedan *SOLD* 95 Mitsubishi 3000GT VR4 - BPU *SOLD* 97 Eclipse GS Star Stage 2
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