Hi !

Have you look on these two different graphs ?

https://www.cobaltss.net/forums/2-0l-lsj-performance-tech-47/psi-fi-kit-installed-5461/ (see post #20)

and

http://cgi.ebay.com/ebaymotors/ws/eB...ayphotohosting

It seems that the air/fuel ratios are near the same ! What are your comments about it ???

Why on the Revitup web site they claim a 45whp gain from the PSI-FI kit, where dyno shows about 25whp and 30 ft torque ? These are nice gains nervertheless...

Personnaly, I bought a 3" pulley from Pulley Technologies, and will install it friday ...

Thanks, have a nice day !

 

The only thing is this and maybe somebody can clarify for me.... I thought the biggest problem with just going to a smaller pulley was that that bypass valve limited you... Ive read that it only begins limiting you at 6k rpm up to redline... On my dyno graph you can see they shut me down at 6k (not very happy about that).... dont know what the air fuel was doing after that point which seems to be the key area your going to look at...

 

the psi-fi kit has the same problem with the bypass unless you disable it.

 

Im dumb... you guys are disabling the bypass huh ?

"Oh man, Im so high. I dont even know whats going on"

 

ExHondaMan I don't think they shut off the dyno pull before your engine reach his own cut-off ... It would be better that they give them a call to verify ...

I have seen dynos that shows as high as a 1000 RPM's difference at WOT relative to the car's tachometer.

The one we use (a Mustang one) shows 6250 RPM on the graph when we achieve the cut-off a (when the tachometer shows 6500 RPM).