Hey guys,

To start of I'm on stage 2 injectors (42.5lb) and yes I've read all about the IDC use and everything. The IAT2 temp debate and everything involving smaller pulleys on 42.5lb injectors.

I have an aeroforce to monitor the IAT2 temps.
I'll soon have a wideband sensor to hook up to said aeroforce.
And as I don't race all the time the injectors will be fine excedpt when I go WOT at the track or back roads once in a blue moon. And since stage 2 runs rich leaning out the a/f ratio by capping injectors at 100% should be fine.

So the question is how much extra boost and power should I see by going from a 2.9 Nates to a 2.8 Nates?

 

Well seeing as you are lucky enough to live in Florida and are pretty much at sea level I would think +/- 19 psi. Here in Calgary we are at 3500' SL and I see +/1 16 psi @ WOT. You probably wont see much in the way of HP gains but your low end TQ will be improved. I have a 2.85" pulley and my TQ is incredable so much so I adjusted my TQ management to compensate in 1st and second gears.

Oh...My IDC @ WOT @ 7000 rpm @ 16 ms IPW = +/- 90 %
cheers

 

I keep hearing all sides of the IDC debate. Ran into some Cobalt guys at the track who ran 2.7 pulleys on 42.5lb injectors laughing saying they've run it for a good year and a half with no issues. And they made multiple passes down the track consecutively.
I figured a 2.85 or a 2.8 would be fine because I can monitor it. I'll still have the 2.9 and stage 2 pulley in case it gets bad.

Right now with the 2.9 I see 16 to 17 pounds at the the 5300 to 7000rpm range and 15lbs instant on the gas.

So an extra 2 pounds maybe?
I remember some one saying for every pound of boost on our cars equals an extra 7hp so 14 hp?

 

should see about 17-17.5 psi at sealevel, thats what i was at with my 2.8

 

You said that is what you were at?
What reason did you change?