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View Full Version : Why not a DP on an automatic car?


MartinNr5
05-02-2007, 04:55 PM
Holley doesn't recommend a Double Pumper on a car with automatic transmission but so far I haven't had any problems with it.

Why are thery recommending against it?

:Do No:
DaWildcat
05-02-2007, 05:00 PM
Good question, perhaps they're afraid people aren't knowledgable enough to tune the accelerator pumps to avoid bog on full throttle. Once I put a double pumper on, I never looked back.

Devon
LARRY70GS
05-02-2007, 07:02 PM
As usual, they only consider Chivvys. Buicks have their own set of rules:TU:
Greg Schmelzer
05-02-2007, 09:53 PM
As usual, they only consider Chivvys. Buicks have their own set of rules:TU:

Larry sure got that right!!! I had one on an old 68 Polara I had and never even thought about a different one. Loved it.
Stage1 Jeff
05-02-2007, 10:48 PM
You know why they build Chevrolets? So Buicks have something to eat!
MartinNr5
05-03-2007, 03:23 PM
As usual, they only consider Chivvys. Buicks have their own set of rules:TU:

I guess that's why their rule for calculating the size of the carb isn't working either. :)

I have a750 cfm DP on my car which according to Holleys rule of thumb for carb size is pretty much the right one but as I understand from other threads I can put on a 1000 cfm without "overdoing" it.

Thanks for the feedback guys. :)