Weber carb on V8 engine

[1-tonmudder]

I have liquidated some automobiles around here and am gonna build a work truck outta the stuff I have layin around.I have a good 305 engine thats less a carb and intake.I have both 2 and 4 barrel intakes for it but no 4 barrel carb.I have a near new Weber 3236 two barrel carb Id like to use but Im not sure if it will be enuf for a stock 305 on a 1/2 or 3/4 ton (havent decided yet) truck.So whatcha think,use it ir pony up the benji's and buy a four barrel???.Its been at least 10 years since I daily drove a carbed vehicle so I'm not real enthuzed either way.

 

[ryoken]

that was a pretty common Mercruiser package back in the day in the boats.. i still see em here and there.. gets the job done...

 

[ccarley]

You know you want 4 IDA's on there

Clay

 

[meanboyjr]

The Weber 32/36 is a pretty common swap for Jeeps with the 258 CI 6 cylinder. The 305 is a little bigger.

The old formula for carb CFM is engine displacement x maximum rpm / 3456. The formula assumes 100% VE. You can multiply that result by .85 or .90 (85 or 90% VE) to get a more realistic CFM number.

Anyway, assuming a 4500 RPM redline, 305 x 4500 / 3456 = 397 CFM. 397 x .85 = 337 CFM.

IIRC, the 32/36 flowed 300 CFM. I'd say you're right in the ballpark for a used, stock 305.

 

[1-tonmudder]

The Weber 32/36 is a pretty common swap for Jeeps with the 258 CI 6 cylinder.

Thats what it was on.

 

[diesel4me]

I bet a 305 will run better with that Webber 2 bbl carb than one would with a 4 bbl,maybe a Q-jet would be OK due to the small primary barrels,but I've had a few 305's with Edelbrocks and AFB's and they seem over-carberated when you booted the 4 barrels in,they ran stronger on the primary barrels...a stock GM Rochester 2 bbl carb is somewhere between 250-350 cfm depending on which version it was,so I say leaner is meaner,try that Webber out and tell us how it panned out..