 Anyone understand IR manifolds, And how they affect carb sizing ? |
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| got914? |
 Jul 29 2015, 01:20 PM
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Member  Group: Members Posts: 133 Joined: 8-October 14 From: Niagara Member No.: 17,993 Region Association: None  |
Im looking at putting carburetors on a motor and trying to figure out how to select the carb size ?
Is it all based on head flow or is that only part of it ? There isnt much on the internet other than proven engine combos. Now a 250 Chevy straight 6 can run triple webers that flow 250 cfm per choke for a total of 1500 CFM, this is where i know IR manifolds work with higher CFM because obviously a single 1500 carb on a common plenum manifold would be way over carb'd. Now its a 3.3 Subaru motor H6 boxer engine. 202 CI HEad flow data found here http://speedtalk.com/forum/viewtopic.php?p=189677 States it maxs out at about 165 cfm SO I would assume I can use that as part of the calculation. Obviously you cant go higher than that or your over carbing. What are your thoughts ? |
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Posts in this topic
got914? Anyone understand IR manifolds Jul 29 2015, 01:20 PM
Mueller As copied from Jenvey:
What is the best throttle ... Jul 29 2015, 01:46 PM Mark Henry Might help if you state what engine you have in mi... Jul 29 2015, 03:12 PM got914?
Might help if you state what engine you have in m... Jul 29 2015, 03:31 PM Mark Henry Three 40mm IDF webers on a custom mild steel tube ... Jul 29 2015, 03:48 PM DBCooper This is a 2.2 with Dellorto 36's:
http://www.... Jul 30 2015, 07:55 AM
got914?
This is a 2.2 with Dellorto 36's:
http://www... Jul 30 2015, 03:55 PM rgalla9146 Call PMO The Porsche carb specialists
Th... Jul 30 2015, 09:10 PM a914622 On the 3.3 the head casting is the biggest restric... Jul 31 2015, 07:51 AM  |
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