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Author	Topic: Help with comparison question
Jerry Piner Gearhead Posts: 224 From: staunton, va Registered: Dec 2001	posted 02-12-2004 11:32 AM I know a couple of guys and have read about several Chevy guys running the ZZ4 motor either basically stock or with small changes and their cars run 7.30's-7.60's. When you look at the specs on this motor it looks rather mild. I mean most of this guys are only shifting around 5800. Basically I am wondering how can this motor run so good with such a mild combination. What would you have to do to a 351W to get it to run similar to one of them. IP: Logged
Mpcoluv Gearhead Posts: 1333 From: Charlotte NC usa Registered: Apr 2001	posted 02-12-2004 02:17 PM I think those ZZ4 crate engines have a high velocity, high swirl cylinder head. The cam is moderate I think. The ZZ4 is just am example of a well matched combo. No rocket science involved. A 351W with AFR 185 heads, 10:1, moderate cam and a RPM airgap with a 750 holley should run as good or better than the ZZ4 motors. IP: Logged
Rustang Gearhead Posts: 805 From: Clarion PA Registered: Nov 2000	posted 02-12-2004 05:01 PM How much HP are those chebby motors rated at? A 3000lb car would probably need about 375-400 flywheel hp to go 11.60's. That's probably in the 7.30-7.60 range if I remember ------------------ '68 mustang 351 clevor- 10.92@124 '67 Stang, 351W -11.18@118 '69 351C Torino-14.90@100 '78 Pickup 351W-15.56@88 '79 Pickup 460 ET=?? IP: Logged

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