Thread: Supercharger boosting half way when warm?

Are you basing boost level on lego blocks or do you have an actual boost gauge?

When I put headers in both my GTPs, I never made "full boost" according to the block. But on my Boost gauge I was between 6-7PSI.

You're not building as much boost, but you are flowing better.

Sounds like you need a real vacuum/boost gauge.

But I am thinking you have a different problem here.

Clogged exhaust.

And I wouldnt romp on the car when cold, its not really good for it.

Maybe.

If you don't have any gauges to monitor the car then its really hard to say what it going on.

And codes?

Did this start before or after you replaced the BBV? If you install the lever wrong, you won't hit full boost.

Change your SC Belt, look for Vac Leaks. Maybe your just knocking too much. I think someone mentioned KR Sensor activates at 160*. Dont quote me on that though.

Intake and headers without a tune? Might be running lean and retarding timing. It might also be worth checking out your mass airflow sensor (MAF).

Knock Retard Sensor.

Reason why you get full boost and faster when cold is because the KR sensor isn't activated. So you can knock for days, and nothing is going to stop it.

When warm, the KR sensor monitors the engine. My guess is you are knocking, and the engine is retarding greatly to prevent you from blowing it up.

yes. it is helping you. if you are having too much knock it is keeping you from screwing your engine up.

if it is knock and the car is retarding the timing. you have a problem that is causing the knock. you will have to hook it up to a scanner while driving it to find out how much knock.

did this just start or something?

maybe you need different spark plugs.