Carb Size...

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Posted by Marty [50.68.51.62] on Thursday, September 05, 2013 at 12:55:53 :

In Reply to: Re: 2bb / 4bb posted by Ray Marzolf [98.200.65.42] on Thursday, September 05, 2013 at 07:15:33 :

..is tricky because it depends on what you want out of your engine. A big carb makes the most power at WOT on a dyno but a smaller carb will give you better acceleration.
Edelbrock claims this is the best formula for street driven vehicles...multiply your cubic-inch displacement by the maximum rpm limit and then divide by 3,456 to represent the volumetric efficiency.
So a 230 that you want to be able to run to 3000rpm...they say you want a 200CFM carb.

Follow Ups:

Marty pretty much has it down - Bruce in BC 14:05:37 09/05/2013

Re: Marty pretty much has it down - w200 Tim 14:38:37 09/05/2013
- One cfm per cid. - Chris Case 21:25:08 09/05/2013
  - Biggger carb = 20% more HP at freeway speed. - Chris Case 21:27:04 09/05/2013
    - Re: Biggger carb = 20% more HP at freeway speed. - Kaegi 11:33:13 09/06/2013
    - Re: Biggger carb = 20% more HP at freeway speed. - Dave 02:29:09 09/06/2013

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