Problems with Supercharger on L98
Thread Starter
Heel & Toe
Joined: Sep 2002
Posts: 18
Likes: 0
From: Norman OK
Problems with Supercharger on L98
I have an 88 Coupe with 85k miles. Our car ran perfectly prior to us installing the supercharger 2 weeks ago & ran fine for a week afterwards. The supercharger is a Paxton with 6psi running. Now 2 weeks later, the car is pinging, leaking oil around the oil cooler (replaced the gasket & still leaking), the intake is leaking, the idle is at 1500 rpm in park (tried to adjust it but it keeps jumping back to the 1500).
I am aware that I need to fix the oil leaks (it's in the shop as we speak) but obvious backpressure. How can I relieve this? (we already have a valve cover breather) Also, will a chip help for the idle/pinging?? Already running 93 octaine.
Thanks in advance
I am aware that I need to fix the oil leaks (it's in the shop as we speak) but obvious backpressure. How can I relieve this? (we already have a valve cover breather) Also, will a chip help for the idle/pinging?? Already running 93 octaine.
Thanks in advance
Team Owner
Joined: Aug 2000
Posts: 24,125
Likes: 3
St. Jude Donor '14
Re: Problems with Supercharger on L98 (88vetteZ52)
Pull the oil re-fill cap off, rev the engine a bit, and put your hands over the opening. If you feel air hitting your hands, that pretty much says you've got serious problems.
Drifting
Joined: Dec 2001
Posts: 1,313
Likes: 1
From: providence ut
Re: Problems with Supercharger on L98 (88vetteZ52)
He's talking about piston blowby, if you have it at idle you will have more at boost and will have to deal with the crankcase pressure......vent every hole in the valve cover with filtered breather caps including the oil filler cap and you'll be OK . by the way you are not boosting at idle so the supercharger can't have any effect on your ping at idle, it must be something else, did you get a new chip from carrol?
Racer
Joined: Jun 2001
Posts: 406
Likes: 7
From: Ellicott City Md
Re: Problems with Supercharger on L98 (88vetteZ52)
It is a carroll kit.
Thread Starter
Heel & Toe
Joined: Sep 2002
Posts: 18
Likes: 0
From: Norman OK
Re: Problems with Supercharger on L98 (Blown Vette)
Went to the shop and got a partial write up of what is wrong with the car:
(we are also going to retard the timing to take care of the pinging at high rpms)
oil pan leak
oil cooler leak
intake gaskets
new throttle body
valve cover leak
Guess we'll get these fixed & look at a rebuild later. :cry
This way we can drive it like hell and not feel bad because it's got a new engine in it :cool:
Besides, I've got a couple races coming up real soon (Z3 M roadster & a turbo focus they are :crazy: thinking they have a chance :smash: ) :D
[Modified by 88vetteZ52, 10:16 PM 9/17/2002]
[Modified by 88vetteZ52, 12:20 AM 9/19/2002]
(we are also going to retard the timing to take care of the pinging at high rpms)
oil pan leak
oil cooler leak
intake gaskets
new throttle body
valve cover leak
Guess we'll get these fixed & look at a rebuild later. :cry
This way we can drive it like hell and not feel bad because it's got a new engine in it :cool:
Besides, I've got a couple races coming up real soon (Z3 M roadster & a turbo focus they are :crazy: thinking they have a chance :smash: ) :D
[Modified by 88vetteZ52, 10:16 PM 9/17/2002]
[Modified by 88vetteZ52, 12:20 AM 9/19/2002]
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Intermediate
Joined: Sep 2002
Posts: 33
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From: Dallas PA
Re: Problems with Supercharger on L98 (88vetteZ52)
I'd say the 1500 idle is a gasket in the intake area leaking air in to the engine. I have a Ati Procharged 84 C4. I put on a tuned port a few monts prior to installing the blower. This meant that all intake gastets were in top shape. I had a good friend set me straight on what I needed to do before I installed the procharger. We really went over every thing well just to make sure things would work. I find around 8 or 9 psi the dip stick blows up spraying oil all over the pass side of the car . And it goes smoking down the street. I watched a video of me at the local strip and the croud let out some loud "ooooooo's" when the car smoked up towards the end. It was too funny. As for the pinging, I really don't know about you supercharger system. I wonder if its intercooled?
Melting Slicks
Joined: Mar 2001
Posts: 2,150
Likes: 304
From: Timra, Sweden
Re: Problems with Supercharger on L98 (88vetteZ52)
A question just to make sure ...
Do you still have the hose between the PCV valve and intake connected? If you do then you will boost your crankcase too and then it WILL leak all over.
Do you still have the hose between the PCV valve and intake connected? If you do then you will boost your crankcase too and then it WILL leak all over.
Thread Starter
Heel & Toe
Joined: Sep 2002
Posts: 18
Likes: 0
From: Norman OK
Re: Problems with Supercharger on L98 (JoBy)
The PCV valve on the drivers side is still connected. As for the passanger side open hose that goes to the intake manifold, it has been disconnected & is being vented now. I have purchased K&N breather/filters for the passenger size & for the oil fill cap. If I need more relief than this, I'm pretty sure I'm lookin at an overhaul.
Thanks for all the help!
Thanks for all the help!
