I'm not insane!! Better Exhaust = Better Spool

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Sep 27, 2013 | 07:54 AM

#21

pdexta

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From: Knoxville, TN

I'm sure you'd see more at higher boost, but it's still an 8hp peak gain and 20hp gain down low. I certainly wouldn't call it a bust by any means.

I love the before and after comparisons, we need more of this on the site. Prop worthy for sure.

Sep 27, 2013 | 11:41 AM

#22

hornetball

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From: Granbury, TX

Quote:

Originally Posted by albumleaf

I don't think I'd want to be at 12.5:1 at 10 psi. That half point of AFR might be hiding a bit of power, but I wouldn't go any leaner than the 12:1 you're at now.

Agree. Noticed that AFR difference. More comfortable with what I have now, although it probably costs a bit of power like you said. I've also managed to improve that lean spot I had at low RPM.