i recently got into a discussion with a guy on a local forum out here in tennessee. he claimed that the stock seals would break apart once the boost level hit 14.7 psi. im very sure this is bunk. soooooooooooooooo, can any of you guys gimme your highest boost numbers on STOCK seals.

thanks,
paul

heres a link to the thread if you wanna read:
http://www.tennesspeed.net/forums/sh...5&pagenumber=1

 

That's what Ray is running from PFS on the stock seals.

 

point proven!!!! thanks a lot guys!!!!


thirtyfreakintwomotherfucking P-S-I!!!!!!!!!!!!!!!!!!!! what in the hell?!?!?!?!?! that is crazy. haha. i want that on my car. haha. anyways, thanks again guys.

paul

 

maybe the guy means stock seals with a stock ecu. then I could see 14.7 being a limit. Otherwise like rikki said it's all in the tuning.

 

all these high #s, you guys don't mean always running that high right? i can't imagine 32 pounds will last long.

 

I absolutely believe 32 psi if he was using race gas and the proper tune. What people don't understand about boost is that there is no "magic boost number" that will blow a motor. As long as you don't ping, you can run a ton of boost. My friend has a grand national and he runs 28 psi at the track with a tank full of C-16.

 

wasn't sure if the original question was what's the highest boost that won't blow the engine vs what's the highest boost you can realistically run. but i guess i doesn't matter.

 

time to pin that motor if you wanna run that kind of doost. it's like buying insurance.....i did. now i need a turbo that can suck like a 2$ hoe to spit all that "air" into my built motor....

broke and taking donations...

 

I agree with Rikki. GOOD tuning, GOOD fuel, there should be no problems with running high boost on stock seals. I'd be more concerned about the turbo holding up at high boost levels than the motor. But higher boost is going to wear everything quicker...you're not going to get 80,000 miles out of a motor running 30 psi.

 

Well, the original question was the highest boost the engine (in particular, the stock apex seals) will take. Now, that is going to be a different number than the highest boost the stock turbos will take.

Slap a single turbo on there, and with the proper tuning as Rikki said, you can crank up some serious numbers.

 

atock seals aren;t the problem with proper tuning, etc. it is the rotor housing. elongated usage and mileage at 15psi will warp rotor housing. You start to decrease the life of the egnine after 15psi. Dave at KD rotary was telling me how at 18-20 psi engine has a signiicantly lower life maybe only 20k miles. obvisouly depends on many factors.

 

I've heard the 14psi thing as well.
Jim

 

which is why you can do "things" as rikki and i stated that can strengthen the engine itself. there is no reason to simply say that it will be signifigantly shorter. however, i do agree that if the proper course of action is not taken, the engine will suffer the debitriment of not following through with these procedures.

however, again, if you have an engine built for 30psi, 1. it generally never sees the road or 2. it sees 30psi once in a blue moon, and you stick to 18-20psi....

 

well ray doesnt need to worry about any 'reliability' issues considering he works for FARRELL lol....im sure he can rebuild a motor in an hour or 2......

 

you can haev all the "things" you want, still doesn't change the fact that rotor housings are seeing 15+psi. I didn't say you could run 30 psi, read my post again. and yes there are plenty reasons to say why engine life will be shorter, namely warped rotor housings.