weber cfm flow rates

sen2two · 02-14-2010, 09:44 PM

Now i posted that for reference for my question. Im building an old school twin dizzy 12a with a moderate to large sized peripheral port. I have a Holley 465 that i was wanting to use, but i also have a holley 600, wich is now seeming to be the better choice.

I have seen time and time again, people try and succeed on getting a 600 to run good on a 12a, but a 465 still seems to be the better choice. But these are on street and bridge ports. Im thinking a 465 might be to small for a PP if a 48mm weber can choke a PP and having well over 100cfm more flow.

So would i be better off using the holley 600 in this case? or porting and modifying the 465 some?

About how much cfm does a PP need? This might help me in picking a carb...

02-14-2010, 09:44 PM	#1
sen2two KTEC Join Date: Jan 2009 Posts: 642 Rep Power: 0	Now i posted that for reference for my question. Im building an old school twin dizzy 12a with a moderate to large sized peripheral port. I have a Holley 465 that i was wanting to use, but i also have a holley 600, wich is now seeming to be the better choice. I have seen time and time again, people try and succeed on getting a 600 to run good on a 12a, but a 465 still seems to be the better choice. But these are on street and bridge ports. Im thinking a 465 might be to small for a PP if a 48mm weber can choke a PP and having well over 100cfm more flow. So would i be better off using the holley 600 in this case? or porting and modifying the 465 some? About how much cfm does a PP need? This might help me in picking a carb... __________________ what I have: 1985 Gs:12a All motor Drag car - 1973 Rx2: Play car What I had: 93 Touring: TRADED - 91 Coupe: TRADED - 90 GTU: RHD - 88 10AE: SOLD - 87 Base: SOLD - 86 Base: SOLD - 1985 GSLSE - 85 Gsl: SOLD - 80 Gs: TRADED - 1972 Rx2