ZZ4 scrap value
Bill
Last edited by wmf62; Sep 4, 2018 at 06:17 PM.
You don't have to replace a head with what came off it. There are other choices.
If you don't want to do that, strap that engine on a pallet and ship it to me via FastenAll. I'll be happy to pay the shipping. Might even throw in a gift card to Texas Road House.





You may find some salvageable parts to sell, or to help someone else out (one head, a crankshaft, spare rods, etc.).
It has 15,000 miles, even the bore looked good in the photos but photo's can hide a lot sometimes.
The Best of Corvette for Corvette Enthusiasts
The new ZZ6 with 405 HP
https://www.gmperformancemotor.com/parts/19351532.html
Realisticly I could have that fixed in 2-3 days back good as new. I hope 66RBS takes it to someone that knows what they are doing for evaluation.
The new ZZ6 with 405 HP
https://www.gmperformancemotor.com/parts/19351532.html
Sold the old ZZ4
Last edited by 66RBS; Oct 9, 2018 at 06:45 AM. Reason: spelling

BH
The ZZ4 is discontinued and replaced by the ZZ6 family which uses Vortex style fast burn heads. The port design requires that the intake manifold sits a little higher than non vortec head thus my concern for hood clearance.
I did not get the ZZ6. I was concerned about hood clearance and if I remember correctly GMPP told me the dual plane manifold on the 19333157 was shorter.than ZZ6. Also to get 405 HP the ZZ6 requires a 770 cfm carb and I planned to reuse the 670 CFM Holley I had on The ZZ4
The SP 350/385 HP seems to be nearly identical to ZZ6. ZZ6 has roller rockers, 385 has stamped steel. Both use the same roller cam. 385HP uses dual plane manifold which GMPP said is 1/2" taller than ZZ4. ZZ6 uses single plane and it looks taller. Both ZZ6 and 385HP use the angled spark plug aluminum fast burn heads. Similar to ZZ4 so I could hopefully reuse my block hugger headers. As you can see I tried to minimize the additional work/parts on the install. I did not go the 383 route as I have a 3.70 rear end and saw no need for more torque.
Check my post on ZZ4 crate motor failure for the 3 small problems on the install.
another forum member advised the 19333157 385HP motor fit in his 66 just barely clearing the small block hood. I ended up with 3/4" clearance with a 2" drop air cleaner
It does idle smoother than the ZZ4 but the ZZ4 had the LT4 hot cam which yielded 12" vacuum. don't know what vacuum I have on the 385HP. Another forum member mentioned that the LT4 cam installed in a ZZ6 gets you the 430HP that GMPP made.
Randy














