prochareger
Registered User
Joined: Feb 2005
Posts: 599
From: Colorado Springs, CO
Cylinder 5 showed 50% on a leak down test (not good). You can make it last for a while, but you need to get it on the dyno and make sure your running on the richer side. You should also add colder plugs (i run the ngk tr-6). If you get the air/ fuel ratio to around 11.5:1, you should be ok...just try not to beat the **** out of it every stoplight and itll be OK for a little while...There are guys out there running on the stock bottom end, but its really hard to say how long it will last..
Registered User
Joined: Jan 2005
Posts: 440
From: West Palm Beach, FL
I ran 8psi, 3 row ProCharger IC, 24 lb SVO inj, FMU, in-line pump, stock timing, no dyno tune for quite a while with no problems. I never opened up the needle valve on the FMU to make sure it always ran rich. But for the good luck I had there's plenty of others who broke pistons within a couple thousand miles or less. Luck of the draw, I guess. But eventually, I did crack some ring lands. I bet if a few degrees of timing were pulled on the top end it would of lasted longer.
Registered User
Joined: Jan 2005
Posts: 440
From: West Palm Beach, FL
Kinda hard to say exactly but about 15-18,000 miles. I changed my setup later so that I went with a dyno tune, ported heads, delete FMU, bigger inj. My boost dropped by 2 lbs. but HP went up. BTW, keeping tabs on fuel press. is pretty important. You should install a fuel press. guage also.
Last edited by joe-96z1le; Feb 6, 2007 at 08:38 PM.
Registered User
Joined: Oct 2002
Posts: 3,225
From: IN
IMO, 6-8#'s intercooled you will probably be alright for a while. But even if you play it safe, it is still risky on how long you will last, and the odds are that at best you might survive 25,000 miles or less.
If you only run 4#'s, you'll probably last twice as long, however at that point it goes back to what I originally was saying about not being cost effective (thousands of dollars, with minimal HP increase)
If you think eventually the motor is going to be rebuilt anyway, just put the small blower on, and let the good times roll. Then when it blows, do the rebuild to handle boost, and then you can go with a smaller blower pulley and have some REAL fun.
When it comes down to it, you need to ask yourself if you would be happier with a blower car for a short amount of time? Or would you rather save the $ needed to build a motor to handle boost for a long time? You can always spend (probably less) $ elsewhere and go with a good head and cam combo that will make more power than a blower would at only 6-8#'s anyway.
If you only run 4#'s, you'll probably last twice as long, however at that point it goes back to what I originally was saying about not being cost effective (thousands of dollars, with minimal HP increase)
If you think eventually the motor is going to be rebuilt anyway, just put the small blower on, and let the good times roll. Then when it blows, do the rebuild to handle boost, and then you can go with a smaller blower pulley and have some REAL fun.
When it comes down to it, you need to ask yourself if you would be happier with a blower car for a short amount of time? Or would you rather save the $ needed to build a motor to handle boost for a long time? You can always spend (probably less) $ elsewhere and go with a good head and cam combo that will make more power than a blower would at only 6-8#'s anyway.
