Holley HP Series Carbs

[Sieg]

Originally Posted by sik68

I'm running a 780cfm chokeless carb on my 355 (236/242 SR) and on the street it is definitely soft below 2500 rpm, and doesn't really come into its own until 4k. I think if it were more of a driver, I would really appreciate the 650 carb on it.

I dont miss the choke one bit though like the other guys are saying. 2 pumps, fire it up, idles on its own from dead cold.

Thanks Steven, great confirmations!

[Sieg]

This Holley technical document pretty much closed the sale for me: http://www.holley.com/data/Products/...R10565rev1.pdf

That and the functional improvements made to the new Ultra HP over the HP: http://www.holley.com/0-80802HB.asp

Poor man's fuel injection!

[Vegas69]

I wouldn't go that far. It's a cool carb but modern fuels aren't meant for carburetors and I don't see anyway it will prevent heat soak or flooding under heavy braking. Then throw in worse gas mileage and cold performance. Back off the cam a touch and throw EZ EFI on it and be done.

[Sieg]

Originally Posted by Vegas69

I wouldn't go that far. It's a cool carb but modern fuels aren't meant for carburetors and I don't see anyway it will prevent heat soak or flooding under heavy braking. Then throw in worse gas mileage and cold performance. Back off the cam a touch and throw EZ EFI on it and be done.

Todd I know where you're coming from......the EZ EFI would be great but the budget isn't there right now ($2180 less $457 insurance credit).

I typically run clear (non ethanol base) premium in the car. My card lock account has it at a couple local stations, road trips would most likely force the use of E10.

The baffling in the new Ultra float bowl "may" actually help the braking issues: http://www.holley.com/data/products/...geFuelBowl.jpg

[-Freak-]

Have you looked at any of the Quick Fuel carbs?
Ive heard a lot of good things about them.
http://www.quickfueltechnology.com/

[Sieg]

Originally Posted by -Freak-

Have you looked at any of the Quick Fuel carbs?
Ive heard a lot of good things about them.
http://www.quickfueltechnology.com/

I have and they are very nice.......I just don't like the blingy color combo on my car with the orange and blackout theme. The stealth Holley has the function and fits the theme.

[sevillaz28]

Just a quick reply to this. I have a 500hp 383 in my 69 and I went from a Quick Fuel Q-750 to the new Holley Ultra HP 750 and its a world of differance. Better responding carb by far out of the box and after changing jets for my engine and tuning it in I'm going to change out the carb on my 67 to an Ultra HP also.

Holley did an excelent job with this carb and to go from sea level to 9000 feet with no issues for 4 days bouncing around Reno and Tahoe, says a lot for the carb.

[Sieg]

Thank you, that input is very helpful!

[alvin3a]

Originally Posted by GregWeld

.... and one more caveat.

Whatever you do -- stay clear of their "Avenger" POS useless crap of a carb.


Trust me on this one.

Just curious why you say this... please tell us more

Thanks
Alan

[GregWeld]

Originally Posted by alvin3a

Just curious why you say this... please tell us more

Thanks
Alan

No point messing up this good thread with useless info -- but those carbs are just nothing more than a OEM replacement carb and not for replacements on a HP motor.