Carb Spacer Question... - Chevy Nova Forum
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Old 23rd-June-2008, 03:26 PM   #1
62bandwagon
 
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Carb Spacer Question...

I have a 750 square bore Holley carb & a Performer RPM Air-gap intake. I am considering trying out some carb spacers, do I want to use the 4 hole style or the open center type with this intake?

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Old 23rd-June-2008, 03:55 PM   #2
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Talk to a couple friends and see who has what that you can borrow. Then go to the track and see what works best for your car.
EVERY motor is different and will even act different at different elevations. There is absolutely NO way to say what motor will respond to any kind of spacer.
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Old 23rd-June-2008, 03:55 PM   #3
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I just finished installing the RPM Air-Gap intake on my 355 yesterday. I am running a BG Road Demon 625cfm square bore carb. I used the 1" phenolic spacer for square bore.
http://www.jegs.com/i/Mr.%20Gasket/720/3404/10002/-1
I am very pleased with the results!
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Old 23rd-June-2008, 04:00 PM   #4
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Quote:
Originally Posted by Gota66 View Post
I just finished installing the RPM Air-Gap intake on my 355 yesterday. I am running a BG Road Demon 625cfm square bore carb. I used the 1" phenolic spacer for square bore.
http://www.jegs.com/i/Mr.%20Gasket/720/3404/10002/-1
I am very pleased with the results!
Ill be ordering this soon!!
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Old 23rd-June-2008, 04:21 PM   #5
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I guess what I was really wondering was if either a 4 hole or open center spacer is recommended on my dual plane intake. Sounds like I can use either, is that correct? I plan on trying some different heights of spacers.
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Old 23rd-June-2008, 04:58 PM   #6
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I have a 4 hole spacer on mine now.

This pdf seems to have some good info. http://www.gnetworks.com/v4files/bar...h%20images.pdf
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Old 23rd-June-2008, 05:07 PM   #7
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Quote:
Originally Posted by D-Man View Post
Talk to a couple friends and see who has what that you can borrow. Then go to the track and see what works best for your car.
EVERY motor is different and will even act different at different elevations. There is absolutely NO way to say what motor will respond to any kind of spacer.
What he said !
That said.
Mine liked it on the open on the Hurricane and the Air Gap .
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Old 23rd-June-2008, 05:20 PM   #8
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I thiink if you need a few more upper RPM go with a 1 inch open and see if it likes it ? But you can run any type spacer ,its your choice !
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Old 23rd-June-2008, 05:31 PM   #9
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Plastic , aluminum or phenolic for street use?
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Old 23rd-June-2008, 06:04 PM   #10
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Originally Posted by 62bandwagon View Post
Plastic , aluminum or phenolic for street use?
They say aluminum for the street... but I've been using phenolic for years now with no problems.
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Old 23rd-June-2008, 06:50 PM   #11
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Ive been using a plastic spacer. I dont have any problems with leaks or cracks. It also keeps the carb away from the manifold to keep it cool.

-dan
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Old 23rd-June-2008, 08:34 PM   #12
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Thanks for the info guys!!
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Old 23rd-June-2008, 09:59 PM   #13
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Are the HVH spacers worth the money? ~100 vs. the 30 for the plastic spacers?
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