Stock engine and stock head gasket, i was running stock pulley before and can hardly believe the owner before change head gasket to a thicker one.
I could live with this also, the car is fast enough and gave 200 kw at 6300 rpm on a rolling road that did not went more than 200 kw

 

nice!! that's good power @ 6300 rpm, should be on point to make about 280 - 290rkw @ 9k

 

Question. Did u make 10 psi on a separate gauge reading or did u log aem ems during the pulls? Stock map sensor won't read much over 10 psi. So if you are reading the map sensor then u prolly are making 12 psi but that sensor will not know it.

Get a gm or aem 3.5 bar.

 

This is what i was referring to . You are probably making 12 psi but you cant log it with the stock map sensor .

 

I bought a cheap analog boost gauge today, just to make sure that the boost was ok.
At redline 9200rpm it was just below 0,9bar= 13psi.
Seems to be as it should?
It´s a cold day here in Sweden with only +3C= 37,4F
With that result and that the log showing the boost rising till redline, i´m happy.
It´s probably like you guys says, that the map sensor don´t read over 10psi.

/Broman

 

Sounds like thats normal. I've hit over 13 psi on a cold day with the 4" pulley.

 

Perfect, finaly i can let go off this!
How much hp did you get?

 

I made 406whp on a dyna pack dyno.

 

Yeah, here is a dyno sheet of mine a few months back. This sheet has two back to back pulls on it. One on the dyno with the hood open, one with the hood closed, thats the only difference.

Notice the drastic variation of psi from just the intake temp differences. PS: this is a 3.4" pulley which is supposed to be 15psi, however, due to my J's header and testpipe, it is lower.

 

10PSI is very good for a 4" Pulley, I was using a 3.33" and was only making 12PSI @80000 RPM since I had a 8000 REV Limiter. Still making 405HP @ 97F Ambient Temp.

Wanna 3.33", I sell you mine for $60 incl. S&H