Help me pick carburetor

[mustangguy289]

I currently have a DaVinci modified Holley 650 that flows about 730. For a while now I have been thinking it is a little too big for my motor and looking at changing to a true 650CFM carburetor.

I am really looking into getting the Holley Street HP 650 which is a more street friendly version of the HP 650. Does anybody have any experience with this carburetor or have anything thing else they would recommend?

289 C.I. Naturally Aspirated/Pump Gas
AFR 185 CC HEADS
Victor Jr intake ported to match heads
10.4:1 comp
.607/.614 lift solid roller cam
4 speed standard transmission
4:30 rear gear
roughly 3100 lbs race weight with driver.

The current setup with the Davinci carb has run an 11.82 @115 mph.

Any advice would be nice. I want to spend $500 or less and it needs to be street friendly but also work well at the track.

[STRONGNUFF]

Damn 25 years ago I ran a Holley Dominator 650 double pump with mechanical secondaries, back then it was a great carb but I'm out of the loop now a days

[mustangguy289]

Damn 25 years ago I ran a Holley Dominator 650 double pump with mechanical secondaries, back then it was a great carb but I'm out of the loop now a days

I don't even think they make a Dominator in less than 950 CFM anymore.

[slow55]

Damn 25 years ago I ran a Holley Dominator 650 double pump with mechanical secondaries, back then it was a great carb but I'm out of the loop now a days

I've always had good luck with Barry Grant street demons. I haven't messed with the new HP series from Holley yet but heard they are good carbs. They basically made them to compete with the Barry Grants anyways.

[Damnittsteve]

love my proform650

[sickpony]

from holley the the 650 and 750 share the same baseplate and butterflies. I would be interested to see what all is modified on your carb. Could be as simple as interchanging a few parts and jetting. Sounds like one hell of a 289 and it is running some good numbers. So why do you think it is too big? My 302 ran much better with a larger carb than anyone recommended and was very streetable.