SBC C4B intake vs a Holley 300-36?

[pdq67]

Maybe Big Joe 1 will know?

How do they compare?

pdq67

[Carnut1]

Paul, there were 2 different c4b designs. One I like one I don't. The big Holley is better than both.

[user-612937456]

Any Air Gap is superior by every standard with exception you need that extra 3/4" hood clearance

[Carnut1]

Any Air Gap is superior by every standard with exception you need that extra 3/4" hood clearance

GVX, where did you get this info? I know the airgap is a newer design only 25 years old vs. 50 but I have never seen a direct comparison. I think the Holley is a solid design. I hate the notched plenum divider on airgap.The Holley has a slight dip in the plenum divider I never liked.

[bigjoe1]

There is VERY LITTLE DIFFERANCE between dual plane intake manifolds- NOT EVEN ten HP





JOE SHERMAN RACING

[Walter R. Malik]

The Holley 36 is the exact same design as the Z28/ LT1 Chevrolet intake manifold with very slightly larger runners and a squared-off carb pad, plenum entry.

[novadude]

There is VERY LITTLE DIFFERANCE between dual plane intake manifolds- NOT EVEN ten HP





JOE SHERMAN RACING

Seems like this is the conclusion everytime this comes up (and I believe Joe). Makes me feel better about running my GMPP "performer" style manifold on my vortec heads, since no one makes a spreadbore RPM-style hi-rise for Vortecs.

[pdq67]

Paul, there were 2 different c4b designs. One I like one I don't. The big Holley is better than both.

Charlie,

I didn't know there were two C4B intakes out there.

What's the difference between them?

Can you post a couple of pictures showing their differences?

pdq67

[BOOT]

http://www.hotrod.com/articles/dual-pla ... mparisons/

I think modern intakes are better even if the runner is smaller, they are just more efficient. I'd choose the Holley because it's looks to be more modern design.

[Carnut1]

images.jpg

top one Is the later design just before they came out with the performer. I have never owned one. I hate the shape of the runners and notched plenum. Bottom I like but only with the oval opening carb pad. This manifold I have used and I made an oval notch in the divider. The divider with a notch evened up some flows on different runners. Ran quite well.

[pdq67]

Thanks Charlie!

pdq67

[Carnut1]

Glad to help.

[dr5375]

Carnut1, those are C3BX. The C4B had a 4 hole carb pad. I tried all those old Edelbrock and GM dual planes back in the 70s because the "stock" class I was running required a stock type intake. The best one I ever ran was the GM 350 LT1, but like Big Joe said it was very little difference in the whole bunch.

[Walter R. Malik]

images.jpgtop one Is the later design just before they came out with the performer. I have never owned one. I hate the shape of the runners and notched plenum. Bottom I like but only with the oval opening carb pad. This manifold I have used and I made an oval notch in the divider. The divider with a notch evened up some flows on different runners. Ran quite well.

As far as I know and has been said, these manifolds shown are C3B and C3BX manifolds ... all the C4B's are the same with 4 holes in the carb pad..

[Carnut1]

Yep, my mistake.