Cam going flat?
Race Director
Joined: Feb 2004
Posts: 12,518
Likes: 19
Teach me your tricks, and I would appreciate it greatly.
Tech Contributor
Joined: Oct 2008
Posts: 3,729
Likes: 190
From: Custer, WI
Le Mans Master
Joined: Oct 2008
Posts: 9,758
Likes: 49
From: Houston Texas
You can put other induction on a ZZ4. Doesn't have to be a carburetor. Besides the 650 on the crate engine isn't pulling what EFI could.
Top Flight Corvette in San Diego replaces L98 engines all the time with ZZ4s. A tuned right ZZ4 will produce nearly 400 hp at the fly wheel. I've talked to him about a ZZ4 in my '92. Jerk out the LT1 with opti, insert a ZZ4 with '91 ECM. He says he's done it before. Get more HP, TQ and no opti problems. The HEI distributor will fit under the hood because it does on a '91 (same hood).
Top Flight Corvette in San Diego replaces L98 engines all the time with ZZ4s. A tuned right ZZ4 will produce nearly 400 hp at the fly wheel. I've talked to him about a ZZ4 in my '92. Jerk out the LT1 with opti, insert a ZZ4 with '91 ECM. He says he's done it before. Get more HP, TQ and no opti problems. The HEI distributor will fit under the hood because it does on a '91 (same hood).
Melting Slicks
Joined: Jan 2009
Posts: 3,482
Likes: 196
From: folsom california
lucky to live in Texas or any other state with liberal smog laws.
in California replacing an L98 with a ZZ4 crate engine would be doable; just don't brag about it to the smog man.
but you would never, absent some special permission from a smog referee, be able to replace an LT engine with a gen 1 (traditional) small block. no how. no way.
in California replacing an L98 with a ZZ4 crate engine would be doable; just don't brag about it to the smog man.
but you would never, absent some special permission from a smog referee, be able to replace an LT engine with a gen 1 (traditional) small block. no how. no way.
