SBC Manifold Comparrisons

Cylinder Head and Manifold Discussion

SBC Manifold Comparrisons

Postby Chad Speier » Wed Dec 12, 2012 10:33 am

I have all these manifolds here at one time. I took the time to photo them next to each other. I thought some would benefit..

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Re: SBC Manifold Comparrisons

Postby Chad Speier » Thu Dec 13, 2012 8:55 am

Sizes. Measure in middle of opening and lengths in middle of runner.

Holley 300-110
inner runner: 2.94 CSA, 4.625 long
outer runner: 3.36 CSA, 5.50 long

Edelbrock 2925
inner runner: 2.89 CSA, 5.58 long
outer runner: 2.85 CSA, 6.56 long

Edelbrock 2970
inner runner: 3.26 CSA, 5.525 long
outer runner: 3.29 CSA, 6.54 long

Edelbrock 2892
inner runner: 3.58 CSA, 5.42 long
outer runner: 3.66 CSA, 6.30 long

Hurricane (Bowtie)
inner runner: 3.34 CSA, 5.54 long
outer runner: 3.70 CSA, 6.42 long

Holley 300-25
inner runner: 3.34 CSA, 4.38 long
outer runner: 3.45 CSA, 5.025 long
Chad Speier
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Re: SBC Manifold Comparrisons

Postby Chad Speier » Sun May 12, 2013 10:10 am

RHS SBC available in carb or with fuel rails.

inner runner: 3.20 CSA, 4.76 long
outer runner: 3.48 CSA, 5.600 long

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Re: SBC Manifold Comparrisons

Postby Orr89rocz » Wed May 15, 2013 8:11 am

I am curious what carb version intake is similar to edelbrock victor E efi single plane? It was barely 1205 port out the box, now opened to 1207 and seems large
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Re: SBC Manifold Comparrisons

Postby Adger Smith » Sat Aug 17, 2013 8:51 pm

Chad,
Question?? Which manifold has the best entry angle? Could you go back and post your thoughts on that in the port size listing chart? That is great info on port lengths. I'm always second guessing my measurement of port length.
Thanks,
Adg
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Re: SBC Manifold Comparrisons

Postby xe5800 » Mon Aug 19, 2013 3:10 am

Chad Speier wrote:RHS SBC available in carb or with fuel rails.

inner runner: 3.20 CSA, 4.76 long
outer runner: 3.48 CSA, 5.600 long

Image

Hi Chad,

What are your thoughts on the RHS intake?
Compared to say the edel or holley?

Thanks for the info mate,
Troy
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Re: SBC Manifold Comparrisons

Postby Chad Speier » Wed Sep 11, 2013 8:17 am

xe5800 wrote:
Chad Speier wrote:RHS SBC available in carb or with fuel rails.

inner runner: 3.20 CSA, 4.76 long
outer runner: 3.48 CSA, 5.600 long

Image

Hi Chad,

What are your thoughts on the RHS intake?
Compared to say the edel or holley?

Thanks for the info mate,
Troy



I like it, it's designed well.
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