Quote:
Have been running a 750 3310
for the last year but got a great deal on a street
avenger 670 and was thinking that might be a bettercarb for what I have. The Dart is also a 4 speed.
I have a 360 that is producing approximately 370 HP. I have had both a 3310 750 and a 670 Street Avenger on it (as well as a 600 Holley and a 725 Demon).
I have a self imposed 6000 rpm redline and up to that point the butt dyno can not tell a difference between the 670 and 750. BUT, the throttle reponse and below 3000 rpm driveability with the 670 is dramtically better. Plus the 670 gives my 5 mpg more than the 750.
The 670 is wet flow rated compared to the 750 so if it had been dry flow like the 750 it would be more like a low 700 cfm rating. Also, if you look down into the venturis of the 670 you will notice that the primaries are smaller than the secondaries (even though the throttle blades are all the same size). This accounts for the excellent low rpm driveability.
The 670 is staying on the engine until the day I decide to go EFI.
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