![]() |
|
![]() |
#1 |
Registered User
Join Date: Sep 2005
Location: bedford Indiana
Posts: 70
|
new zz4 engine
Has any one put a new zz4 engine in their truck? How does it run and what fuel mileage do you get with it and with what gear ratio you use?
|
![]() |
![]() |
![]() |
#2 |
Senior Member
Join Date: Jan 2000
Location: Cincinnati, Ohio
Posts: 1,492
|
Re: new zz4 engine
I bought three of these ZZ4 engines new. All three have unfortunately had problems. I'm probably one of the few that got bad ones. Still have one in my Blue K20 and it does well with the 4.11 gears and 35" tires. That one had defective valve springs, dropped valves and cracked the aluminum heads. GM finally owned up the the problem and fixed it. The 2nd one was in my other K20 when it had the same problem. GM fixed it also and I still have it on the shelf. I went back to more of a torque motor in that truck. I recently installed the third one (out of warranty by now
![]() I hope I have better luck with the 502 I'm getting ready to order.........no wonder I drive a toyota everday to work...... |
![]() |
![]() |
![]() |
#3 |
Registered User
Join Date: Sep 2005
Location: bedford Indiana
Posts: 70
|
Re: new zz4 engine
Dean, sorry about the problems you had with the engines. sounds like I might be rebuilding the old 350. What kind of fuel mileage did you get out of them?
|
![]() |
![]() |
![]() |
#4 |
Senior Member
Join Date: Jan 2000
Location: Cincinnati, Ohio
Posts: 1,492
|
Re: new zz4 engine
I have never really checked the mileage, but doesn't appear to be much different than any of my other 350s. I'm running it with an Eldebrock 1406, original exhaust manifolds, HEI and Borla mufflers. It isn't really a problem because you can wind it up, but they are not low end torque motors.
|
![]() |
![]() |
![]() |
Bookmarks |
Thread Tools | |
Display Modes | |
|
|