zz4 engine question?
Drifting
Joined: Jun 2001
Posts: 1,704
Likes: 458
From: Mass Mass
The ZZ4 is pretty much an L98 with higher compression, little bigger cam, and 4 bolt mains.
Few small things: (That I can remember
Use Fuel pump block off plate from your old engine.
Use L98 water pump (not the one that comes with the ZZ4), and have to grind a little on this bolt - to make it fit.
Some use the smaller diameter harmonic balancer from the vette L98, but you can use the larger ZZ4 balancer, if you dent the crossmember down a litttle...
Think that's all, any more ??? let me know
Last edited by SuperL98; Feb 2, 2009 at 07:24 AM.
Le Mans Master
Joined: Aug 2000
Posts: 8,838
Likes: 31
From: Australia
Same head , same casting ; better (LT4 ) springs fitted
http://forums.corvetteforum.com/1564259341-post3.html
http://www.sdpc2000.com/product/2450...ateEngine.aspx
http://www.jegs.com/i/GM+Performance...02609/16051/-1
http://paceperformance.com/index.asp...&ProdID=194446
Last edited by rodj; Feb 1, 2009 at 09:25 PM.
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Safety Car
Joined: Apr 2002
Posts: 3,531
Likes: 1
From: Conroe TEXAS!
Cruise-In X Veteran
ZZ4 has the same 58cc , angle plug 113 heads used on late L98's
Same head , same casting ; better (LT4 ) springs fitted
http://forums.corvetteforum.com/1564259341-post3.html
http://www.sdpc2000.com/product/2450...ateEngine.aspx
http://www.jegs.com/i/GM+Performance...02609/16051/-1
http://paceperformance.com/index.asp...&ProdID=194446
Same head , same casting ; better (LT4 ) springs fitted
http://forums.corvetteforum.com/1564259341-post3.html
http://www.sdpc2000.com/product/2450...ateEngine.aspx
http://www.jegs.com/i/GM+Performance...02609/16051/-1
http://paceperformance.com/index.asp...&ProdID=194446
LT4 valves too.
Plus a forged crankshft, PM rods, LT1 pistons
Thread Starter
Racer
Joined: Nov 2008
Posts: 252
Likes: 0
From: Morehead KY
I have an 88, but everthing should be the same..
The ZZ4 is pretty much an L98 with higher compression, little bigger cam, and 4 bolt mains.
Few small things: (That I can remember
Use Fuel pump block off plate from your old engine.
Use L98 water pump (not the one that comes with the ZZ4), and have to grind a little on this bolt - to make it fit.
Some use the smaller diameter harmonic balancer from the vette L98, but you can use the larger ZZ4 balancer, if you dent the crossmember down a litttle...
Think that's all, any more ??? let me know
The ZZ4 is pretty much an L98 with higher compression, little bigger cam, and 4 bolt mains.
Few small things: (That I can remember
Use Fuel pump block off plate from your old engine.
Use L98 water pump (not the one that comes with the ZZ4), and have to grind a little on this bolt - to make it fit.
Some use the smaller diameter harmonic balancer from the vette L98, but you can use the larger ZZ4 balancer, if you dent the crossmember down a litttle...
Think that's all, any more ??? let me know
Thread Starter
Racer
Joined: Nov 2008
Posts: 252
Likes: 0
From: Morehead KY
Thread Starter
Racer
Joined: Nov 2008
Posts: 252
Likes: 0
From: Morehead KY
also another question what kind of performance are you looking at with using your original intake with the zz4. I know it wont produce as much as buying the whole carburated setup, but still about how much power should i be looking at?
Drifting
Joined: Jun 2001
Posts: 1,704
Likes: 458
From: Mass Mass
I've got a blower on mine, so my results won't help you much...
One other thing, I was told (by quite a few people) is the ZZ4 oil pan didn't have as good baffles, as the Corvette, and it would stick down to much.
Turns out that wasn't exactly true, the baffles look the same and although the ZZ4 does hange down lower, it is still above the transmission pan. I glued a skid plate on it anyway, but I don't think you need it.
I wanted to leave the ZZ4 long block as untouched as possible, if I ever had any warranty problems, and I thought I might pull it out and sell it off someday, when I rebuild the original motor
Thread Starter
Racer
Joined: Nov 2008
Posts: 252
Likes: 0
From: Morehead KY
If your ALL stock, intake, exhaust, etc .... You might see 10+ HP & Torque (not much), with headers, better exhaust and intake a bit more.
I've got a blower on mine, so my results won't help you much...
One other thing, I was told (by quite a few people) is the ZZ4 oil pan didn't have as good baffles, as the Corvette, and it would stick down to much.
Turns out that wasn't exactly true, the baffles look the same and although the ZZ4 does hange down lower, it is still above the transmission pan. I glued a skid plate on it anyway, but I don't think you need it.
I wanted to leave the ZZ4 long block as untouched as possible, if I ever had any warranty problems, and I thought I might pull it out and sell it off someday, when I rebuild the original motor
I've got a blower on mine, so my results won't help you much...
One other thing, I was told (by quite a few people) is the ZZ4 oil pan didn't have as good baffles, as the Corvette, and it would stick down to much.
Turns out that wasn't exactly true, the baffles look the same and although the ZZ4 does hange down lower, it is still above the transmission pan. I glued a skid plate on it anyway, but I don't think you need it.
I wanted to leave the ZZ4 long block as untouched as possible, if I ever had any warranty problems, and I thought I might pull it out and sell it off someday, when I rebuild the original motor
Thread Starter
Racer
Joined: Nov 2008
Posts: 252
Likes: 0
From: Morehead KY
IM planning on upgrading the intake with edlebrock baseplate and runners. What style would I need? My car is an 89, but since im changing the engine over to zz4 do i go with something else. On jegs it shows the intake as either being for 85-88 sb chevy's or 89-92 sb chevys? which one would i use with the zz4?
http://www.jegs.com/p/Edelbrock/749252/10002/-1
http://www.jegs.com/p/Edelbrock/749252/10002/-1
Le Mans Master
Joined: Aug 2000
Posts: 8,838
Likes: 31
From: Australia
89-92 sb chev refers to the late F=body iron heads with changed bolt angle
Team Owner
Joined: Dec 2000
Posts: 90,675
Likes: 304
From: SE NY
Cruise-In II Veteran
I suggest you freshen up the #113 heads with 2.00"/1.56" valves, at least a 3-angle valve job and some pocket porting along with some chamber cleanup and 1.6:1 RRs, springs, etc.
You could also siamese the intake base to get some more high end torque out of the engine.
You could also siamese the intake base to get some more high end torque out of the engine.