I routinly use the ZZ4 rotating assy as a replacement engine for many marine applications. Absolutly no problems with these engines. We found the brand new ZZ4 rotating assy to be no more money than a reconditioned engine. Good luck Al
I put one in my '91 Z28 back in 1998 and topped it off with the stock TPI set up. It was perfect. I put 70,000 hard miles on it over the next few years, swapped heads on it a few times. Swapped cams and intakes a few times. Never 1 problem with the motor at all. I highly reccomend them to anyone wanting a replacement GEN1 small block.
The roller lifters, 1 piece rear main seal, and o-ring-type plastic timing cover are all far superior to the what came in our C3s originally.
Location: Rohnert Park/Sonoma Co. ca/born in NY Rockaway Beach
Originally Posted by TopGunn
I think it's a great engine and runs like a top. I was disappointed with the power, changed the cam and heads and it's much better to me now.
I would have to agree... I jsut did the ZZ4 in mine, ANd I sure wish I should have done the LT-4 hot cam package with it..
I have even thought maybe the 383fast burn was the way to go..
It was just a little light on the HP for me.. I dyno'ed at 260 ..
I have shorty headers, 2.5 all the way with magnaflow, curved dist, and built carb.. And I just wish I had about another 50-75
Oh well ... i plan on the cam swap here soon.with a 200r swap as well..
I put a ZZ4 in my 80. I love it. Also it was one of the very few crate engines I could find that would fit under my stock hood. That 383 has a higher rise intake that won't fit. Even with the ZZ4, I need a drop-base air cleaner and now it just barely clears the hood. Of course you can get a big block hood for more clearance, but that's another $600-700.