School me on head upgrades

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Oct 17, 2010 | 08:03 AM

#41

s2000Junky

Community Organizer

Joined: Jun 2007

Posts: 31,070

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Quote:

Originally Posted by ChefJ,Oct 17 2010, 06:10 AM

I bumped my f20 to a redline of 10,200 because when I do shift I want it to be higher in the rev range while entering the next gear. The higher the rpm's in the next gear the higher the hp/tq. in my case anyway.

So you over rev... letting it fall on its face for aprox 1k miles to catch a split second of your max power band in the next gear? If you even make max power at that rpm

Oct 17, 2010 | 08:03 AM

#42

ChefJ

Registered User

Joined: May 2006

Posts: 7,659

Likes: 3

From: Braselton, GA

Quote:

Originally Posted by Sideways,Oct 17 2010, 07:07 AM

I'd like to see the dyno with you going 10,200 rpm.

Is the power still climbing at that point?

I see it climbing at 9600 rpm and haven't gone further.

Mine peaks out right around 9400 and starts to decline. The tq drops a small amount. I have a t4 equal length with the s372. ar is only 1.00 and it can't breath that well up top. I need to swap it our for the 1.25 when I have the time. I'll try and post the plot later when I get home. I also haven't went with oversized valves on the exhasut side yet although the head was built to handle higher rpm's.