Realistic Octane Requirements

General engine tech -- Drag Racing to Circle Track

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MadBill
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Re: Realistic Octane Requirements

Post by MadBill » Thu Dec 06, 2018 6:17 pm

Olds455 wrote:
Thu Dec 06, 2018 6:06 pm
F-BIRD'88 wrote:
Wed Nov 28, 2018 3:08 pm
Use the correct old gm air cleaner base so you can use a high rise dual plane manifold. None of the aftermarket bases are right or as good as this gm muscle car air cleaner base.
You mean a drop base air cleaner? I remember watching a video of some different filters and bases tested and the drop base showed a power loss over a standard base air cleaner. Whichever you use, fit the tallest air filter possible. I see a lot of C3 owners going with a 4" filter and a 2" drop base, it seems like.
An apples to apples comparison would be a 4" filter with a 2" drop base vs. a 2" filter with a zero drop.
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grandsport51
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Re: Realistic Octane Requirements

Post by grandsport51 » Thu Dec 06, 2018 7:35 pm

See Old HRM Comparo.

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Re: Realistic Octane Requirements

Post by grandsport51 » Thu Dec 06, 2018 7:36 pm

I apologize it didnt post as a link

https://www.hotrod.com/articles/air-cleaner-assembly/
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Re: Realistic Octane Requirements

Post by F-BIRD'88 » Fri Dec 07, 2018 1:42 pm

My real testing on various cars says different.
I
This is the best air cleaner, and it also FITS the car.
You really just need the base.
Remove tge choke horn (holley) or use a hp style carb body.

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