forensicsteve

Good luck with and enjoy the build

ApexStang

Damn, I have a stock block and a Whipple that is producing 12 psi. Now I am worried big time!

hotairgypsy

man i am playing with the a grenade also...At WOT on the top end i am at 12 lb of boost at 4700 elevation. Mine sits at 10lbs until i think about 5k and then it goes to 12lbs of boost. My tune is by JDM. They emailed me my tune and once installed i sent to texas hotrod and had them dyno it to see if we were close. It needed adjustment and so THR and JDM talked about the adjustments and the sent a second tune that corrected the areas which needed correcting. Hope mine holds up betting so i do not blow it too quickly.

zkiller

You think 12.0 - 12.2 is "spot on"A/F for a supercharged motor at 12 PSI?

You should be at 11.5 - 11.6 tops on your air/fuel. If you had 12.0- 12.2 A/F that is way lean for pushing 12 PSI.

What kind of gas were you running?

Brent tuned my car and it is at 11.5 across all RPMs at WOT - I am compl;etely surprised he would say that an A/F of 12.2 was "spot on"

Only a fool would run 12 PSI on a stock block without a custom dyno tune. How dou you run 12 pounds of boost and only turn 12.5 quarte-mile times?

kolb02

Sorry dude but thats what I heard. And thanks for the fool comment.

Vcoat

Sorry to hear about your motor!...I defitnetly could be next...I am at 12.7 A/F running almost 13psi Dynoed at 525 rwhp. I have no problems todate and i have been getting on it....

06Saleen3V

Do I hear a 298 stroker motor calling your name

john111987

Are you sure you weren't making more than 12 psi? The 3.0 is suppesed to be around 13-14 psi plus whatever boost that overdrive pulley is worth.

07BOSSGT_S197

hmmm glad I read this thread!! I'm on a "stock" KB pulley at 10.5psi of boost with approx 11.5 A/F @4900rpm. I was thinking of going down a notch to a smaller pulley. No sir-eee!!! I want my stock lower end for a "just in case" scenario.

Sorry for the luck man...sounds to me like you almost "wanted" it to happen for that forged bottom end!

zkiller

Well, actually that comment was for the guy (hotairgypsy) running 12.5 on a Saleen with 12 PSI and a canned tune.

Since you hade a dyno tune I would have expected a safer A/F than 12.2 though.

93 octane gas is not sufficent for 12 PSI either!