Which jets
Thread Starter
Racer
Joined: Dec 2004
Posts: 336
Likes: 0
From: crystal lake Il.
Which jets
I replaced my 670 street avenger with a 650 double pumper with mechanical secondaries. I dynoed the car with the 670, the jets were 68 & 70. Should I have the same with the 650?
Le Mans Master
Joined: Nov 2008
Posts: 5,691
Likes: 12
From: columbus oh
no..they are metered differently, surprisingly you may want to richen the dp or at least give it a try...on the other hand, the street avengers are jetted too lean out if the box....good luck
Race Director
Joined: Oct 2000
Posts: 15,044
Likes: 79
From: central FL, near the beach.
71 & 76 is what my book says, stock.
that is race carb
that series is infamous for running rich out of the box. All 5 circuits will need tuning for proper street use.
Good for the drags & dyno if that is your hobby.
what intake do u have?
that is race carb
that series is infamous for running rich out of the box. All 5 circuits will need tuning for proper street use.Good for the drags & dyno if that is your hobby.
what intake do u have?
Last edited by Matt Gruber; Sep 25, 2009 at 04:49 PM.
Race Director
Joined: Oct 2000
Posts: 15,044
Likes: 79
From: central FL, near the beach.
if u r happy with the way it runs, no black smoke, go get a dyno test. 
.
if u or anybody else with a gas sucking drag car want to convert it to a 17-19 mpg cruiser with NO LOSS OF POWER at the track, there are several ways to do that with a double pumper made for the street.
My favorite combo for u:
4165 holley DP 650cfm
performer RPM Q-jet #7104
base gasket 108-21
.
if u or anybody else with a gas sucking drag car want to convert it to a 17-19 mpg cruiser with NO LOSS OF POWER at the track, there are several ways to do that with a double pumper made for the street.
My favorite combo for u:
4165 holley DP 650cfm
performer RPM Q-jet #7104
base gasket 108-21
Last edited by Matt Gruber; Sep 26, 2009 at 12:36 PM.
