Tried out a 4777 650dp.

[JoeDust451]

Its one i picked up, its a 4777-7, the jetting is 67/73, the throttle responce sounds better, but IMO, its not reacting like the 3310 in the power , its like 1/4 throttle it has pep (somewhat), but after that its not impressive like the 750, its running fine, just feels like it needs more, i would play with jetting, but they should be close from the factory, i guess that settles it for my combo, it likes the 750. So i'll soon have a nice 650dp up 4 sale.

 

[needsaresto]

Are you running it on your 451? WAAAAY undercarbed IMHO due...

I think min 750 800 cfm and more like 1000 to 1100 if you wanna go racing seriously. The smaller carb would boost the vacuum signal and give better throttle response but your going to lose hp bigtime on the topend.

 

[JoeDust451]

Are you running it on your 451? WAAAAY undercarbed IMHO due...

I think min 750 800 cfm and more like 1000 to 1100 if you wanna go racing seriously. The smaller carb would boost the vacuum signal and give better throttle response but your going to lose hp bigtime on the topend.

No, its on a 360 magnum in my dart, the 451 i installed a TR lol. I'm going to try the PF main body for the 3310 once i sell the 650.

 

[JoeDust451]

Update, i jetted up the 650 & milled off the choke tower, it had 67/73s, i installed 70/76s, it feels so much better & actually pulls strong, i'm going back to the track this friday, see how it does.