Whipple at 19 psi on stock motor?

[CannibalCobra]

I just bought a whipple (old stlye) off of a car that injected racing is doing a twin turbo setup on.

I have a BAP, MAFextender, 60 lb injectors, and i'm getting it dyno tuned.

Will i be ok to run 15 psi on 93 octane and 19 psi on 111 octane? Will the motor last?

What kind of numbers would you expect at 19 psi? Right now I have an FIPK and exhuast (stock headers).

 

[CannibalCobra]

come on guys. i was told by my installer that it would be unsafe to run 19 psi on a stock motor for too long. is this true?

 

[kingcobra8541]

From what I have seen most of the stock motors with KB's and whipple's that run high boost will break eventually it depends how hard you run the car.IMHO

 

[JohnsDSGVert]

new motor

I am running a 3.25 upper on the old Whipple and 4lb lower......19.5 boost......twin focus, 60lb injectors, custom rails, 1/2 fuel line, good tune on 93 octane, blah blah blah.......I am looking to rebuild my blown motor......lasted about 100 miles

 

[03outlaw]

Depends

It is all in the tune and FUEL! If you have a Whipple or a KB mix your fuel. Forget 93 octane, At least 95+. According to a good friend of mine 111 is over kill and will end up killing your 02 sensors. I use straight 103, now I also put about 500 miles a year on the car so the wallet does not get hit real bad. Also run more on the conservative side when it comes to AF. I would like to know the AF of these guys blowing their engines. Also remember the temp out side plays a roll as well. :beer:

 

[FireRed04Vert]

I think Sambandit runs some ungodly boost...I would ask his opinion.

 

[Fang]

Sambandit is now on a aftermarket block. I run 19psi but I am at altitude. Holding up for now.

 

[JohnsDSGVert]

tune

it was not my tune.......11.3 - 11.5 nice and smooth.... I honestly think I had a bum piston / cylinder from the get go.....my HP and TQ numbers were always a little lower than others with same mods.......kinda glad I am getting a built motor.

who would you use?

 

[CannibalCobra]

I am running a 3.25 upper on the old Whipple and 4lb lower......19.5 boost......twin focus, 60lb injectors, custom rails, 1/2 fuel line, good tune on 93 octane, blah blah blah.......I am looking to rebuild my blown motor......lasted about 100 miles

could it have been 19.5 lbs on 93 octane? i plan on running race gas. but i think i'll go with 17 lbs.

 

[CHINI]

Well my car blue up from injected racing tuning! It will be fine just make sure you get the best tuner out there.

 

[HISSMAN]

You should be fine if you stick to the parameters that you listed and have a great tune.

-Jeff

 

[SlowSVT]

On a stock block engine running that much boost you will have problems, count on it! At 93 octane I would go no higher then 16 perhaps 17 lbs. It's all a matter of degree. The more you push it the greater the likelyhood of something going wrong. Ultimately you will have more fun with a reliable car then one that gives you constant grief.

 

[HawkMech]

I agree with SlowSVT. Most information seems to show that the safe limit for stock internals is around 16-17psi. I've been running 17lbs for over a year now on a stock block without any issues (knock on wood), but I have a lot of faith in my tuners abilities as well.

 

[HISSMAN]

He is going to be running 111 on 19 PSI. He will be fine if he sticks to that.

-Jeff

 

[CannibalCobra]

He is going to be running 111 on 19 PSI. He will be fine if he sticks to that.

-Jeff

yes, and i will be running 111 pretty often since i can get it for 3.18 per gallon.

 

[HISSMAN]

I will say this though just so that I am not misleading. On your average 03/04 stock short block anything over 575-590 is borrowed time.

 

[sambandit]

If you use 111 all the time, you could prolong your stock SB for a long time. But, anywhere near 600 RWHP on pump is asking for trouble. It may not go today, or tomorrow, but it will happen.

 

[CannibalCobra]

well i plan on running 15 psi on 93 octane and 17 psi on 111 octane. i plan to have very safe tunes.

 

[HISSMAN]

So is it 17 or 19 lbs? With 17 and 111 your motor should last a very long time.

 

[Doc]

Your fine. I wouldn't worry about it at all. Enjoy the ride.