650cfm vs 600cfm
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Senior User
Joined: Jan 2003
Posts: 382
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From: Prairieville, Louisiana
650cfm vs 600cfm
Just got my 302 back in my bronco and got the timing set. Trying to get the air/fuel mixture right but its still running rich. Its a holley 650 double pumper. I have put the smallest jets in the holley jet kit on the carb and my plugs arent the right color when I pull them out.
My question is would stepping down to a 600 be that much of a difference or would I be wasting money. If so what carb do most of ya'll run on your rigs? My motor is somewhat built: Edelbrock performer intake, ported E7 heads, 204/214 cam, hedman long tubes.
My question is would stepping down to a 600 be that much of a difference or would I be wasting money. If so what carb do most of ya'll run on your rigs? My motor is somewhat built: Edelbrock performer intake, ported E7 heads, 204/214 cam, hedman long tubes.
Elder User
Joined: Jun 2009
Posts: 907
Likes: 6
From: nw pa.
hey
im thinking that is the double pumper is killing you .
they are made for the track
if i remember right you can adjust when the secondaires open and when the
2nd accelerator pump works.
hows your power valve?
idle mixure screws ?
how does it run?
im thinking that is the double pumper is killing you .
they are made for the track
if i remember right you can adjust when the secondaires open and when the
2nd accelerator pump works.
hows your power valve?
idle mixure screws ?
how does it run?
Laughing Gas
Joined: Feb 2010
Posts: 781
Likes: 8
From: Sanford, NC
You'd be much better off with a vaccuum secondary 600cfm carb on your truck than a
double pumper. As mentioned above the double pumpers are primarily very high performance type carbs for hot street cars or race cars.
double pumper. As mentioned above the double pumpers are primarily very high performance type carbs for hot street cars or race cars.
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