I don't want to derail the other thread, so I started this thread.
My issue is with the Holley 390 cfm carbs...namely the price and driveability. I have a little GM 2.8 V6 and an Edelbrock Torker II manifold with a 4bbl top for it. The Holley 390 is the recommended carb for it.
From the very beginning I've been suspect of that recommendation. Every cfm calculator I've tried comes up somewhere in the 250-270 cfm range. Additionally, over on the bay I regularly see used 4bbl tops for the manifold...and I've yet to see a 2bbl top. That leads me to think folks are having problems with the 390s. Then over on the original Carb advice thread, Dave wrote:
The other half of my reluctance to go with a Holley 390 is that they are absurdly expensive compared to what I see with other 4bbl carbs...new, rebuilt, core, or carcase.
I've not found any other small 4bbl alternatives, and I keep getting gas mileage horror stories about going with the Holley 350 2bbl. The only other 2bbl I've found with TV cable linkage available for my 700R4 is the old Rochester 2Gs
At this point I'm between biting the bullet and going with a Holley 390, going rogue with a 2G, or pretending the problem doesn't exist, and maybe it will go away by the time to put the engine together (the philosophy I've been following the last few months).
My issue is with the Holley 390 cfm carbs...namely the price and driveability. I have a little GM 2.8 V6 and an Edelbrock Torker II manifold with a 4bbl top for it. The Holley 390 is the recommended carb for it.
From the very beginning I've been suspect of that recommendation. Every cfm calculator I've tried comes up somewhere in the 250-270 cfm range. Additionally, over on the bay I regularly see used 4bbl tops for the manifold...and I've yet to see a 2bbl top. That leads me to think folks are having problems with the 390s. Then over on the original Carb advice thread, Dave wrote:
....The 390's are positivley "piggy" compared to he 450's... don't waste the money......
dave
The other half of my reluctance to go with a Holley 390 is that they are absurdly expensive compared to what I see with other 4bbl carbs...new, rebuilt, core, or carcase.
I've not found any other small 4bbl alternatives, and I keep getting gas mileage horror stories about going with the Holley 350 2bbl. The only other 2bbl I've found with TV cable linkage available for my 700R4 is the old Rochester 2Gs
At this point I'm between biting the bullet and going with a Holley 390, going rogue with a 2G, or pretending the problem doesn't exist, and maybe it will go away by the time to put the engine together (the philosophy I've been following the last few months).