Blowby pb600
Thread Starter
Heel & Toe
Joined: Apr 2004
Posts: 24
Likes: 0
From: Racine WI
Blowby pb600
I just installed a pb600 procharger in my 87 vette. Took it to the strip and did ten runs to see what the improvement would be. Best time was 12.9 v/s 14.2 before installation. I see 8lbs boost on the gauge with a 10lb pulley. The engine has 58000 miles on it. The second time to the strip times were similiar but I noticed more blowby. Have others had this problem? I think the rings are going with the added stress of the supercharger. Any ideas.
Second item: Procharger says the stock chip will work just fine. Is this true I assume Procharger is conservative in their approach and it seems a custom chip would help. New to the supercharger world any information valued.
Second item: Procharger says the stock chip will work just fine. Is this true I assume Procharger is conservative in their approach and it seems a custom chip would help. New to the supercharger world any information valued.
Pro
Joined: Jan 2004
Posts: 503
Likes: 0
From: Forney Texas
I just installed a pb600 procharger in my 87 vette. Took it to the strip and did ten runs to see what the improvement would be. Best time was 12.9 v/s 14.2 before installation. I see 8lbs boost on the gauge with a 10lb pulley. The engine has 58000 miles on it. The second time to the strip times were similiar but I noticed more blowby. Have others had this problem? I think the rings are going with the added stress of the supercharger. Any ideas.
Second item: Procharger says the stock chip will work just fine. Is this true I assume Procharger is conservative in their approach and it seems a custom chip would help. New to the supercharger world any information valued.
Second item: Procharger says the stock chip will work just fine. Is this true I assume Procharger is conservative in their approach and it seems a custom chip would help. New to the supercharger world any information valued.
As far as using your stock chip, I can't comment as I never ran my stock tune. I had hyper pistons and I was too afraid of detonation if the stock tune did not pull sufficient spark advance or add enough fuel. My personal opinion is FI is not a simple plug-n-play system if you use the boost often and expect the engine to last any reasonable length of time. You will of course get different opinions and you will be well served to listen and see if they make sense in your situation.
If you elect to stay the FI course, be prepared to spend some bucks to get the car to run as expected and stay together. Good luck.
90Indy
Thread Starter
Heel & Toe
Joined: Apr 2004
Posts: 24
Likes: 0
From: Racine WI
In response to how the car is setup. The supercharger kit included 10lb pulley, intercooler, fmu, dump valve. The engine is stock with ported heads and intake, MSD al6, tpis headers, power effects cat back, high flow cat, no pre cats, stock cam, 2800 stall converter, beefed up 700r4, stock rear so far with 3.07's. I run the mufflers open so other than the cat there is little back pressure.
Other than the noisy supercharger which gives off the same sound as a gear cam drive I like the drivability and overall power. I am guessing deeper gears 3.75, or 3.55 would do a lot to keep the engine in boost at the strip and lower times. I am fast coming to the realization I need to redo the engine forged everything, and since cost is nearly the same, go the 383 route. It would seem going to a FAST or other engine controller would be good to eliminate the fmu, and taylor the fuel curve to the engine. I don't know how hard that would be.
As I write this is strikes me that many of us have this crazy compulsion to keep modifying. It must be the journey not the destination.
Other than the noisy supercharger which gives off the same sound as a gear cam drive I like the drivability and overall power. I am guessing deeper gears 3.75, or 3.55 would do a lot to keep the engine in boost at the strip and lower times. I am fast coming to the realization I need to redo the engine forged everything, and since cost is nearly the same, go the 383 route. It would seem going to a FAST or other engine controller would be good to eliminate the fmu, and taylor the fuel curve to the engine. I don't know how hard that would be.
As I write this is strikes me that many of us have this crazy compulsion to keep modifying. It must be the journey not the destination.
Melting Slicks
Joined: Aug 2003
Posts: 3,394
Likes: 393
From: Lakeville MI
Are you pulling any timing with a boost retard module? If not, this would be good justification for a custom chip.
Even with the intercooler, it is likely that you will want to run about 8-10 degress less advance under boost compared with what you have now (likely 36-38 degrees without knock retard present).
Perhaps someone with a similar combination can provide more reasonable spark advance values.
Even with the intercooler, it is likely that you will want to run about 8-10 degress less advance under boost compared with what you have now (likely 36-38 degrees without knock retard present).
Perhaps someone with a similar combination can provide more reasonable spark advance values.
Drifting
Joined: Dec 2001
Posts: 1,313
Likes: 1
From: providence ut
Basicly you just vent the heck out of the engine.........some use pvc system or vent to the supercharger filter and some use a vac pump............a new engine is still going to have blowby.......it's the nature of forced induction........with the intercooled procharger kit and 8 psi they didn't require timing retard but I guess it wouldn't hurt.....might lose a few ponies...........I was at full timing for years at 8 psi but my 85 had forged pistons.
Instructor
Joined: Nov 2002
Posts: 142
Likes: 0
From: Coos Bay OR
Back pressure
My 87 had the same problem shortly after install; Cats were plugged up. Started blowing oil out the back of the intake and on the exhaust under boost. Get your car tuned. It will run smoother and stronger.
Burning Brakes
Joined: May 2004
Posts: 1,230
Likes: 27
From: Athens Ohio
I am running a filtered vent to the atmosphere on both valve covers. No PCV. I did have to replace my oil filler cap because the rubber gasket was so hard. It leaked a little oil there. I haven't seen any since I replace the cap.
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In response to how the car is setup. The supercharger kit included 10lb pulley, intercooler, fmu, dump valve. The engine is stock with ported heads and intake, MSD al6, tpis headers, power effects cat back, high flow cat, no pre cats, stock cam, 2800 stall converter, beefed up 700r4, stock rear so far with 3.07's. I run the mufflers open so other than the cat there is little back pressure.
Other than the noisy supercharger which gives off the same sound as a gear cam drive I like the drivability and overall power. I am guessing deeper gears 3.75, or 3.55 would do a lot to keep the engine in boost at the strip and lower times. I am fast coming to the realization I need to redo the engine forged everything, and since cost is nearly the same, go the 383 route. It would seem going to a FAST or other engine controller would be good to eliminate the fmu, and taylor the fuel curve to the engine. I don't know how hard that would be.
As I write this is strikes me that many of us have this crazy compulsion to keep modifying. It must be the journey not the destination.
Other than the noisy supercharger which gives off the same sound as a gear cam drive I like the drivability and overall power. I am guessing deeper gears 3.75, or 3.55 would do a lot to keep the engine in boost at the strip and lower times. I am fast coming to the realization I need to redo the engine forged everything, and since cost is nearly the same, go the 383 route. It would seem going to a FAST or other engine controller would be good to eliminate the fmu, and taylor the fuel curve to the engine. I don't know how hard that would be.
As I write this is strikes me that many of us have this crazy compulsion to keep modifying. It must be the journey not the destination.
