Help! Stock ZZ4 Intake - fuel log

bobfabie · Nov 28, 2022

I’m installing a Holley 4150 double pumper on a factory zz4 intake manifold. Will I have any interference issues installing a fuel log type gas line? I don’t want to pull the trigger on the fuel log unless I’m sure it will work.
Thank you
Bob

Bob Tiley · Nov 28, 2022

You shouldn't. If it is made for a Holley Double pumper it should fit.

bobfabie · Nov 28, 2022

Thanks, Bob. My real concern is whether the stock zz4 intake - with its egr and choke protrusions - will interfere with the fuel log. Further thoughts?
Thanks
Bob

ZZ_430 · Nov 28, 2022

You didn't mention what fuel log you were thinking about. There is a chance that a -8 log with straight fittings won't clear without a 1/2" phenolic spacer that I like to use.

Edit: sorry to step on Bob's post I just noticed.

bobfabie · Nov 28, 2022

Thanks for helping out, Don. I plan to use Earls billet fuel log -6AN part 101175. Your suggestion about using a spacer may provide the clearance - if needed. Any further thoughts?
Bob

ZZ_430 · Nov 28, 2022

bobfabie said:
Thanks for helping out, Don. I plan to use Earls billet fuel log -6AN part 101175. Your suggestion about using a spacer may provide the clearance - if needed. Any further thoughts?
Bob

Bob, I have used that same part before.

I would still go with the phenolic carb spacer. The heater hose fitting on the front of the manifold will contact the fuel line. Also, it's always a good thing to keep heat away from the carb.

bobfabie · Nov 29, 2022

Thanks to each of you. I will follow your advice and purchase a spacer. I’ll try to remember to send a picture of the new intake, carb and fuel log when it’s all installed.
Bob

bobfabie · Nov 30, 2022

bobfabie said:
Thanks to each of you. I will follow your advice and purchase a spacer. I’ll try to remember to send a picture of the new intake, carb and fuel log when it’s all installed.
Bob

Bob & Don
I’m having some difficulty finding a square 1/2” spacer and wonder if using a 1” instead might cause fuel/air intake issues?
Thanks again.
Bob

ZZ_430 · Nov 30, 2022

Bob, how about this one?

https://www.summitracing.com/parts/sum-g1405-1

bobfabie · Nov 30, 2022

Thanks, Don. I ordered it. Best always. Bob

Bob Tiley · Nov 30, 2022

I would recommend these spacers but the thick one is only 1/4" plus the 2 gaskets in thickness.

The wood/Phenolic one should also work well.

Order Products

Heat Shield & Spacers come in standard thickness of .155. Most style Heat Shield & Spacers as listed below also available with a thickness of .232. Colors may vary. Limited time only!!...

www.coolcarb.com

bobfabie · Nov 30, 2022

Thanks, Bob. I will assume the one I ordered will work for me. I appreciate your r response. Bob Fabie

ZZ_430 · Dec 1, 2022

Those heat shields that Bob posted brought back a lot of memories.

In 1985 I was working at the Pontiac dealer...well they had heat soak problems with the computerized Q-jets. After driving a while and then sitting, those Trans-Ams with the 305 motors would buck and surge like nobody's business!

The fix was re-jetting and stacking FOUR of those longer heat shields under the carb. This was directly from the factory rep that visited us. The air cleaner would hit the underhood insulation, but hey! It's what they wanted us to do. I didn't mind because it paid very well. 2.5 hours. LOL

bobfabie · Dec 1, 2022

Great story, Don. Thanks for sharing it with us. Bob Fabie

Help! Stock ZZ4 Intake - fuel log

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