What do yall think?
Thread Starter
|
Senior User
Joined: Nov 2003
Posts: 115
Likes: 0
From: Bagdad Az
What do yall think?
I'm finally on the final stages of my 390 rebuild and Im gonna be putting a holley 600cfm double pumper on it with the stock RV cam and long tube headers. it is going into a 74 highboy what do you guys think of this combo?
thanks
thanks
Elder User
Joined: Sep 2003
Posts: 794
Likes: 1
From: Portland, OR
Double pumper and heavy vehicle is a bad combination. I'd go with the old standard holley 1850. Double pumper's have two accelerator pumps vice one and machanical secondaries. You need a big cam that does not make much low end power to run one. I've seen a double pumper holley work on lightweight off road rig with a mild 351w, but believe the only reason they worked was the weight of the vehicle. If you need more accelerator pump you can always change the pump cam and even change the pump size up to 50CC. You need a very nasty cam profile to handle a 50cc pump.
