Quote:
|
Originally Posted by Cobra #3170
1600cc Formula Atlantic's used to run 50mm DCOE Webers feeding a 24.4 CID cylinder. A 58 mm Weber feeding a single 53 CID cylinder seems a little under carbureted, the more area the better to a point where velocity suffers.
.
|
Weber has a published graph recommending a specific size carb based on cylinder size and max rpm. For any given cylinder volume, the higher the rpm, the larger the carb needed, and the reverse is true, the lower the rpm, the smaller carb. I'll look tonight for their recommendations.
Quote:
|
Originally Posted by Cobra #3170
1600cc Formula Atlantic's used to run 50mm DCOE Webers feeding a 24.4 CID cylinder. A 58 mm Weber feeding a single 53 CID cylinder seems a little under carbureted, the more area the better to a point where velocity suffers.
A single cylinder that has a large plenum available to feed it along with multiple throttle blades will be less restricted and produce more power.
|
The benefit of a weber, IR type intake, is the "ram tuning" effect, of getting greater than 100% cylinder filling from a specific runner length. Also, IR intake systems generally are easier to get equal fuel distribution as opposed to an opne plenum intake, which may not get as ideal air-fuel distribution.