Type3max

iTrader: (2)

I have a V2 supercharger on my car with an 11lbs pulley. When I first got my car dyno and tuned I made 280whp. I recently just dynoed my car again because it felt sluggish and it only made 250whp. The A/F ratio is still the same as the previous run. The boost gauge used to read 11lbs and now I can only boost up to around 8lbs. That is probably where my power went. I was wondering if anyone had a similar problem before, and I curious as to see what the problem was. Any input would be apreciated. Thanks

The Wizard

iTrader: (43)

I would like to help, but you're going to have to be more descriptive. ie. Have to done any modifications since your original dyno? ie. new bov etc etc If not, state so.

Have you done the obvious and check for boost leaks?

matty

iTrader: (54)

Check your belt tension

-matt

Flava_24/7

iTrader: (46)

Definately, I would imagine over time it has stretched some.

ptatohed

iTrader: (12)

I know what it is. You installed an UR lightened crank pulley which was supposed to be stock diameter but ended up being smaller than stock......
http://forums.maxima.org/showthread.php?t=492218

I hate it when that happens.