head work?

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Jun 29, 2009 | 01:32 PM

Thread Starter

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head work?

How much difference did have your heads re-worked make? ie. ported and polished

Jun 29, 2009 | 03:13 PM

Centerline

Road Warrior

Joined: Nov 2008

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From: Double Oak, Texas

There are so many variables, but I will hazard a wild guess that something less than 1/2 the upper range RWHP my bike gained (it gained 42 hp over stock) was due to ported heads and revalved heads.

Jun 29, 2009 | 03:33 PM

cHarley

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From: Boynton Beach, FloriDuh

Quote:

Originally Posted by Centerline

There are so many variables, but I will hazard a wild guess that something less than 1/2 the upper range RWHP my bike gained (it gained 42 hp over stock) was due to ported heads and revalved heads.

From headwork alone? Man, I'd like to see that before and after dyno sheet. Wonder where the torque went?

Jun 29, 2009 | 04:05 PM

Slowpoke84

Road Captain

Joined: Feb 2007

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From: Clark County, WA

Quote:

Originally Posted by cHarley

From headwork alone? Man, I'd like to see that before and after dyno sheet. Wonder where the torque went?

Check out his signature. More than just head work.

Then, in my signature, you can see what I gained from the 95" kit with headwork and cams.

Jun 29, 2009 | 04:24 PM

dyna2319

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From: Northern VA

Heads are just part of the system that makes power. You have to remember that you can build them for high HP, which is not really usable on the street. Or you make some torque which is very usable on the street. You are looking for high flow rates at moderate RPMs for street use and the outrageous velocity for the track use. This has to work in unison with the cam, compression, exhaust etc. that you have selected. You may have all the best parts but they don't work together as a team.

Jun 30, 2009 | 05:46 AM

Thread Starter

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Reason I'm asking is I have a 07SG with a 103 stage 2. Was thinking maybe reworking the heads or going with a different set would bump up the uper rpm range some. Seems to fall off some after @4500rpm