ZZ4 in a 1981
Thread Starter
Le Mans Master
Joined: Feb 2011
Posts: 5,943
Likes: 61
From: Southern NH
That's what I was thinking, and with the stock intake you can probably use the stock air cleaner. I'm just wondering if the stock intake will hurt the performance. the carb will probably have to be re jetted also.
Race Director
Joined: Jan 2000
Posts: 12,399
Likes: 247
From: San Jose CA
FWIW, the stock intake, edel 3701 (closest thing Edelbrock offers to a stock intake) and the ZZ4 dual plane are all different manifolds.
Original QJet intakes have very obvious carb pads, with 4 ports to match the QJet.
Performance wise, they're all pretty close to each other.
BTW, qwank, I'm running a ZZ4 intake on my 78 with the Q-Jet. Works fine.
Thread Starter
Le Mans Master
Joined: Feb 2011
Posts: 5,943
Likes: 61
From: Southern NH
That looks great Shark Racer!! That's the exact look I want. Stock but with a little extra you can't see. Very nice 
I just haven't seen anyone do it with a stock computer yet.
I just haven't seen anyone do it with a stock computer yet.
Race Director
Joined: Jan 2000
Posts: 12,399
Likes: 247
From: San Jose CA
Only one way to find out... I don't think the computer does much other than try to keep the cruise metering at stoich in those cars. You'll likely need to play with the secondary metering rods a bit and adjust the idle.
Thread Starter
Le Mans Master
Joined: Feb 2011
Posts: 5,943
Likes: 61
From: Southern NH
How about one step further, opinions on a ZZ383 with stock intake/carb? How much would it hurt the performance?
What about stock intake with non computer controlled carb/distributor?
What about stock intake with non computer controlled carb/distributor?
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Race Director
Joined: Jan 2000
Posts: 12,399
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From: San Jose CA
The ZZ383 uses vortec style fast burn heads. So if you want to run that setup with a Q-Jet, you'll need Edelbrock 2116 or GM 12496820.
The description says you'll lose 15-25 hp, which I don't doubt. With the low rise you may pick up a little bit of off-idle and mid range torque, however.
The description says you'll lose 15-25 hp, which I don't doubt. With the low rise you may pick up a little bit of off-idle and mid range torque, however.
Thread Starter
Le Mans Master
Joined: Feb 2011
Posts: 5,943
Likes: 61
From: Southern NH
Oh jeez... I knew the stock intake wouldn't bolt to the heads. 
good to know there's an itake that may clear the stock air cleaner though.
I wouldn't mind losing some top end for so low and mid range power though.
good to know there's an itake that may clear the stock air cleaner though.
I wouldn't mind losing some top end for so low and mid range power though.
Race Director
Joined: Jan 2000
Posts: 12,399
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From: San Jose CA
BTW I forgot to mention this but I think the cam is at the point where you might start running into issues with an E4M. You may wanna scope out thirdgen dot org (a Camaro forum), there are a lot of people tweaking with the E4Ms there.