so i just picked up a 01 s2000 with a comptech sc. it has a blitz bov, invida q300, act clutch and flywheel, 255 fuel pump. And i also have a new 1000cc injectors, smaller pulley, and a gready emanage that are not on the car.

I believe it has the 6 psi pulley on there now. when i hit vtech it bounces up and down from like 3-4 psi. could this be the belt slipping?
i wanna add the injectors and pulley to get 10psi, but i also wanna figuer out whats going on first with this lower psi.
does anyone have any ideas or what to look for.
i also have a comptech fuel reg that i need to put on, it has a cheap one on there now.

 

Pull on the belt, there shouldn't be more than 1/4" of play there. Try to twist the belt, you shouldn't be able to twist it more than 90 degrees.

I have a hunch you might have a leak, check coupler between the Blower and the Aftercooler on the bottom, it could be rubbing on the beam below and have a hole in it.

Also check your blow off valve.

 

Are you making 3 to 4 psi at redline or just in vtec? You wont hit 6psi till at redline with a SC

 

ok, so i just tighten the belt. seemed to be a little loose. how do i check the bov. what am i looking for?

 

at idle it sits at -20.
it doesnt show really anything untill i hit vtec then it will hover around 2-4 up to redline. but when its showing boost it doesnt stay still its very shaky. any ideas what this might be

 

http://i875.photobucket.com/albums/a...psk0kl9sej.jpg

http://<a href="http://s875.photobuc...kl9sej.jpg</a>

That should give u a idea what I'm working with.

 

Oh wow that is old school, no aftercooler and all .

You will need Aftercooler with Higher PSI application dude. 10psi too? Your intake temps will be ridiculous. I really doubt anyone would recommend running anything above 6psi without one.


Anyways, I'd check for a vacuum leak, so check all the vacuum hoses on the intake Manifold and where they go.

Keep in mind if you see 6psi at the Redline, then you should be okay. PSI will fluctuate a bit as you go up in RPM which I've seen on mine.

Something like (1-2-3-3-4-3-4-5-5-6psi) but as long as it gradually builds up to 6psi you should be fine. Honestly, you might not even see 6psi just because you hit it so quick for such short period of time that the gauge never registered it.

 

If you have an analog boost gauge with a needle it will definitely fluctuate. Bumps in the road and shakes will make the needle move

 

Agree with the aftercooler...if you want to run anything above the base psi, you will need an aftercooler, a large heat exchanger and a nice water pump. While you are checking for boost leaks, you may also want to check the gauge, where do you have it hooked up to? Make sure the vacuum line to the gauge is not cracked or leaking as well.

 

Take it to a competent tuner and have it put it on a dyno for a good diagnosis. The in car boost gauge can lead you astray.