How To: Fit Carpenter Racing 210/240/265hp Kit (Inc. Dialling In Cams)

Penner

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The lobe centers that are recommended by Carpenter look pretty high to me. It is well over 110.
Did anybody ever try smaller LCs like 105 with this configuation?
 

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The lobe centers that are recommended by Carpenter look pretty high to me. It is well over 110.
Did anybody ever try smaller LCs like 105 with this configuation?

Can't say that I did anyway, wish I had a dyno so I could experiment..
 

Jvheli

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The lobe centers that are recommended by Carpenter look pretty high to me. It is well over 110.
Did anybody ever try smaller LCs like 105 with this configuation?
I can tell you that the cam profile and overlap selected by Carpenter idles like stock and the throttle response is instant and powerful.
 

Penner

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The LC you dial a cam in is a compromise.
High LCs usually get better top end, low LCs better midrange.
There is always a too much above or below these, but within that range you can make it fit your personal preferences.
What you get also depends on the exhaust system and the intake flow, lenght and diameter.
 

Jvheli

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The LC you dial a cam in is a compromise.
High LCs usually get better top end, low LCs better midrange.
There is always a too much above or below these, but within that range you can make it fit your personal preferences.
What you get also depends on the exhaust system and the intake flow, lenght and diameter.
I’d say since Bob Carpenter is a drag guy, max power at high revs makes sense.

Which is why I chose a slightly more restrictive exhaust with long runners. I feel I get the most out of it. The only science I used was looking at others dyno graphs and noted the bottom end wasn’t where I’d like it.

It would be fun to experiment tho, just to see response to changes.
 

Penner

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I agree, that this looks like a cam timing that probably works for maximum hp and drag racing. And that you will always have to try modifications until you know. Plus there are some other things that you have to take care of until you really know. Such as exhaust and intake length fitted to each arrangement.
The only thing I am pretty sure of is, that midrange power will be significantly higher with these cams and smaller lobes.
 
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