Which avenger?

[71Duster]

Still have an urge to try a Street Avenger carb on my Duster. I just don't think I have the gearing for the 650 speed demon with mechanical secondaries.

I assumed 670 would be the right cfm but I see guys up around 770 as well.

It's a warmed over 340 with a 3000rpm stall and 3.55 gears.

Here's the specs:
edelbrock rpm intake

Stock J Heads 2.02 intake 1.60 exhaust and Crane Gold 1.5 ratio rocker arms.

3.55 gears and a 727 with 3000 stall from SMR, stage 2 shift kit from transgo.

It runs a Hughes cam #heh2328al

111deg lobe seperation/installed centerline 108deg
intake lift .506/ exhaust .524
[email protected] Intake223deg/ Exhaust 228deg

Engine is .060 over with Keith Black Hypereutectic pistons on stock rods and a stock forged crank.

Ignition is an FBO box

 

[dgc333]

I am running a 670 on a 360 that is built about the same. I have tried a 725 and a 750 and the bigger carbs don't run any harder on the top end as measured by the butt dyno but the 670 has much better low and mid range response not to mention it gets about 5 mpg more fuel mileage.

Of your car is primarily a street car you will be happier with the 670 street avenger.

 

[71Duster]

It's about 99% street duty, haven't found a used one show up in my area so might have to shell out for new. Just want somthing to compare to the demon, its just kinda a dog off the line but once it can take the fuel it goes.