robb4964

Thinking of getting a procharger for my LT1.
I am getting ready to install a hotcam and mid length headers.
Is 8lb's of boost going to be to much for the car to handle? It will be an intercooled setup "procharger" And probably wont get ran hard very often.

With the cams/Sc/headers and 8lb's how much power would I be pushing?
Think the stock LT1 will handle it? My past LT1's held up for a long time and I have a few friends that have been running 175 shots thrue stock LT1's for quite some time and they are still running pretty good!

Im thinking if I put the blower on there as long as I dont drive it to hard it should last me a while.

BTW, the milage on the car is around 110,000.

Bryan 94 Z28

You'd be really pushing it. If you were to give it a conservative tune you may be able to run 8 psi.

I broke a compression ring on my #1 piston while running 6 psi. Engine only had about 50,000 miles on it at that time. My tune had a few degrees of timing taken out of it and I was using an FMU.

Everett

with the mods in sig i have over 20 thousand on the moter and not a problem yet so if you dont beat the living heck out of it you sould be fine.

Shane

robb4964

Ill probably send it to PCM for less and have Bryan tune it.

Did you beat the car regularly? How many miles was the Procharger actually on the engine before it blew?

Im not gonna drive this car everyday so Im thinking if it will at least last me a year I should be in good shape. After a year and a half or so Im gonna build a forged LT1 that can withstand a crazy amount of boost...

lethal93ta

I drove mine for 2 years with 9 lbs on it, I seen up to 10 lbs on the gage when I took it up to around 6800 RPM, and thats the reason mine blow, the LT4 springs couldnt handle the RPMs and I got valve float braking a retainer droping a valve, I could have just did a valve job and put it all back together but I decided to build a motor thats made for boost with lower compression so I didnt have to run some race gas to run full timing.

robb4964

2 years is a pretty good lenght of time.
The more I read and hear the less I worry.
My z28 went 200k without a hitch being beat pretty good 99% of the time.

Thanks guys, Keep'em coming!!!

5.0THIS

Dont run 8 psi, (or really any PSI for that matter) if you cant afford to have it blow up and be sitting around until you can build the motor.

quickmedic1

I have a 94 25th TA and my engine lasted 10k miles on 8psi before it started to puff smoke from the dip stick and breathers. The motor has 50k miles on it now. I will be putting one of Golens 383s in it with the procharger.

lethal93ta

you need to make a good evac system for it, I took a breather tank from jegs one that normally has a breather filter on top of it, I mounted that to the rad support, I drilled a hole in each valve cover and ran a 3/4 inch hose from each valve cover to the tank, I also ran a line from the PCV valve to the tank, instead of the filter I ran a 1 inch hose down to the inlet of the super charger I used the hole where the factory recerculation valve went in the line sence I have a BOV on mine, that way any oil gets cought in the tank and the extra vapor just gets sucks back into the motor and burnt, I was blowing oil out of my dipstick tube and that compleatly solved my problems. no more oil leaks after that, a vaccum pump would be even better but that costs money and the way I did it worked.

quickmedic1

Thanks lethal 93ta for the advise. I may have to do that on the new combo. Do you have any picks of the set up? I still think I have lost the rings due to the boost used. I will look at it when I get it out.

lethal93ta

it wasnt purty on that set up, when I put the new motor in this time Ill probably use all braided line.
this is right behind the driver head light

quickmedic1

I see you still have the fmu. I had Bryan from pcmforless tune around mine and it really helped the power and drivability. My new combo will be 60lb injectors and 12 psi hopefully. Thanks for the pics. I will be in touch when I get my new motor in if that is ok.

robb4964

Is there an alterative to this remedy? Sounds like you did your homework on it. Thanks for the pics as well.

lethal93ta

its just basic, whne your pushing oil out of the breathers and dip stick you have to much crank case pressure and you have to get rid of it, thats about the only way to do it, the stock rings will have some blowby and thats what happens if you dont vent everything.