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Pampered-Z · 10-14-2008, 04:59 PM

johnjzjz,

I have a question, if you can clearify, or enlighten me.

I was always under the impression that all things being equal, a shorter/longer rod has less effect on top end performance as opposed to mid range. Talking general terms, not full on race motor to squeeze out ever HP. Although I'd like to know which would be better.

Also dewell has less effect on a N/A engine then on an engine with a power adder. I assume that cam overlap would be a big factor?

How would overlap be effected on a N/A engine, I was always under the impression on a boosted engine, you want the dewell to help keep the piston up to keep the cylinder area small so that you use the cam overlap to help clear the cylinder and reduce bleeding off boost.

10-14-2008, 04:59 PM	#7
Pampered-Z Sliderule / Moderator Join Date: Oct 2004 Location: Catawissa PA Posts: 2,294 iTrader: (1)	johnjzjz, I have a question, if you can clearify, or enlighten me. I was always under the impression that all things being equal, a shorter/longer rod has less effect on top end performance as opposed to mid range. Talking general terms, not full on race motor to squeeze out ever HP. Although I'd like to know which would be better. Also dewell has less effect on a N/A engine then on an engine with a power adder. I assume that cam overlap would be a big factor? How would overlap be effected on a N/A engine, I was always under the impression on a boosted engine, you want the dewell to help keep the piston up to keep the cylinder area small so that you use the cam overlap to help clear the cylinder and reduce bleeding off boost. __________________ 93Z M6 Black: The 385 Lives! Supercharged, 3-core front mount intercooler, GTP heads, 3:73's, Street twin clutch, Jethot Longtubes, Mufflex 4" catback/spintech, S+W cage, Spohn Suspenion, Yada Yada Yada 1) Build it 2) Race it 3) Break it 4) Repeat!!!