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Sep 24, 2006 | 07:36 AM

Black_80

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Carb advice

I put a ZZ4 in my 1980 last year. I have an Edelbrock performer 600 on it and it runs great with a lot more power than the original motor. I have no fuel filter yet and can't run the original drop base air cleaner. I am thinking I might get a little more power with a 650. Should I:

1-keep the 600 and use the $60 Edelbrock fuel line (that hugs the carb) and filter and $40 fuel line. Not sure if the air cleaner will clear the auto choke to allow the original air cleaner but I would otherwise be ok.

2-Change the carb for an Edlebrock Thunder 650 with the fuel line and filter above.

3-get my original Q-jet rebuilt, add an electric choke, and set up for the ZZ4. Who should I have do this? Does Lars still do this? This would get me my a fuel filter and the original air cleaner. I have rebuilt carbs with kits but am not at all sure I can tune it right for the ZZ4 motor. I see a Haynes manual for q-jets.

Thanks for any advice.

Dec 23, 2006 | 11:31 AM

BigBlockk

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From: North Bend Ohio

Rebuild the 'Jet yourself. We can step you through the tuning.

BigBlockk

Later.....

Dec 23, 2006 | 01:29 PM

a1sensei

Melting Slicks

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From: Orange Park Fl

Quote:

Originally Posted by BigBlockk

Rebuild the 'Jet yourself. We can step you through the tuning.

Dec 27, 2006 | 02:51 AM

duntovlives

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From: Buffalo MO

Dec 27, 2006 | 09:14 AM

spedaleden

Safety Car

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From: Mundelein Illinois

[QUOTE=Black_80;1557028414]I put a ZZ4 in my 1980 last year. I have an Edelbrock performer 600 on it and it runs great with a lot more power than the original motor. I have no fuel filter yet and can't run the original drop base air cleaner. I am thinking I might get a little more power with a 650. Should I:

1-keep the 600 and use the $60 Edelbrock fuel line (that hugs the carb) and filter and $40 fuel line. Not sure if the air cleaner will clear the auto choke to allow the original air cleaner but I would otherwise be ok.

I did the same thing two years ago. I used the original air cleaner because I liked the way the stock set up got cool air to the motor. I did cut out bottom sections of the air cleaner for linkage issues and choke. I had a Edelbrock 750 which was good. Per the forum and others I changed to a Holley 750. Just got it dialed in (Lars Tuning)and a BIG difference, a lot more power. Still using the original air cleaner.

Dec 27, 2006 | 01:45 PM

BlueL36

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From: End of the Ike IL

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Nice pics spedaleden

Jan 27, 2007 | 07:59 AM

Black_80

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Thanks for the advice! I have decided to redo the Q-jet. I read the Doug Roe book and bought the new Cliff Ruggles book. My Q-jet is completely dissassembled and clean. I am now in the process of following one of Cliff's "recipies" that involves measuring everything and slightly resizing some of the holes for the best transition from idle to off-idle to part throttle to full throttle. I sent him an email with questions and he told me to call him. We talked for about 45 minutes. He could do the work for me but he is backed up through September so he gave me some more help on the phone. If I do most of the work, he can rebush my primaries and reduce the size of my main air bleeds and turn it around in a week. I will be enlarging my idle tubes, accelerator pump discharge holes, secondary tube restrictions, etc. If he is right and I do things right, this should come out great. I might just do a little fine tuning following his and Lars suggestions.