Hi guys,

I've got a comp-tech charger installed on a 2002 S2000 and have noticed lately that the car doesn't feel as fast any more. Looking at the boost gauge, im only getting around 2 psi instead of 5-6psi like normal. I tried to tighten the adjustment pulley on the charger assembly, but it doesn't seem to help. Does any one know if the belt could go bad and need to be replaced? The only thing I can think of is the belt is slipping slightly and not turning the charger as much as is should. Here's some details...

-After cooler installed
-roughly 40,000 miles on motor
-8,000 miles on charger
-Greddy e-manage dyno tuned by Church
-no out of the ordinary noises from the engine

Belt doesn't look glazed or more shiny than normal... but then again I don't look at it all the time so maybe it is. Any one have experience with this? Thanks!

 

boost leak? maybe? can you datalog with the greddy?

 

check the tension on the belt. it should be fairly snug. 1/4" deflection at the most.

 

Loose belt or boost leak sound to be the culprit. How tight is the belt?

 

Mine is doing the same thing. Got a new hose from the boost gauge to the tap fixed it for a day and now it's only going no higher than 4. Which it should be going to 7.

 

I have the same Comptech s/c & a/c on my '02 S. Check air filter element and
clean as necessary. Remove all air hoses between air filter/supercharger/intercooler/intake
manifold and check for debris' or crack(s) or holes. Check PVC valve (it is only to allow air
to pass one way). I found out that my OEM PVC would sometimes allow supercharged air to pass,
so I installed a (straight line) PVC (metal) valve (for a turbo Toyota) in the PVC hose in
addition to replacing the OEM PVC (plastic) valve. Start engine and check intake on supercharger
to see if it is spitting out oil droplets (if so, the supercharger needs to be sent back to
Paxton to have a new internal oil gasket installed). Clean and reinstall all blower hose & clamps.
Check your aftercooler coolant level and add any if needed. Without starting your engine, turn
ignition switch on and listen for noise of aftercooler recirculation pump running; if coolant pump
is not working, then the hot supercharged air is not being cooled by 40-50 deg. F, and your engine
will make less power.
NOTE: An easy way to chek the supercharger belt tension, is to reach in between the supercharger
and the aftercooler--and with thumb and one finger rotate belt (anti-clockwise) 90 degrees. If you
can easily rotate the belt more than 90 degrees the belt is too loose, if less--too tight.
Also, once every 10,000 miles or every 3-years (whichever comes first) check the torque of the small
bolts that hold the bottom supercharge belt pulley to the engine crank pulley. Those small bolts
should have been installed with Locktite to the recommended torque in the Comptech s/c install
instructions. If one (or more) of the small bolts is loose, clean bolt(s) and reinstall (using drop of
Locktite on threads) to the recommend torque reading.

jmoore2k

 

I had the same issue on mine. Running the Godzilla BOV and found that the valve was not seating properly in it so it was still bleeding off my boost when I was on throttle. Fixed the BOV and it was like new again.