Alum ultra HP carbs

1488 Views 6 Replies 3 Participants Last post by wht73, Jul 23, 2012

wht73

Discussion Starter · Jul 23, 2012

Has anyone use these yet?
I'm thinking of trying one for the 406 instead of a custom1 this time.
http://www.holley.com/0-80804RD.asp
They look pretty good with a lot of new stuff like idle air holes in main body instead of drilling plates,extra cap bowls and so on.

Are they the actual cfm? I was looking at the 850. The 950 says "true cfm" next to it.

Any thoughts/reviews?

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Pandora's Box

· #2 · Jul 23, 2012

I was going to buy one but then I found out about Pro Systems carbs. Custom built carbs, built to your engine's specs, bolt it on and pretty much go. A little more than $700 dollars to your door and no messing with it. Comes with full 7 day a week tech support.

Here's a link: http://www.prosystemsracing.com/index1.html

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Wadd2

· #3 · Jul 23, 2012

Never tried the Ultra but if you're in the market for a new carb. my suggestion would be AED. I absolutely love mine. $500 new and they'll custom build it to your combo. I had mine done and the only thing wrong with it was the power valve and that was my fault. I guessed what my vacuum would be on the new motor and it came with a power valve suited to that. The motor didn't make the vacuum and I had to go one step lower with power valve and the carb. was perfect then.

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wht73

Discussion Starter · #4 · Jul 23, 2012 (Edited)

I had a Pro Systems carb on my 355. That is what I have now on the 406 (for now).

I won't say I wasn't happy with it on the 355...just thought I'd pick up a few more et wise then I did.
It does run good at cruze and wot. Idle was a little rich tho even with 21degr initial.
I guess the carb it replaced (750 proform main body) was pretty close to begin with.

Thats why I thought of an HP this time around.

One thing I couldn't understand was the holes in the thottle plates for my 355 with a 227/232 HR cam. It made 14in of vacuum. I wouldn't think it would need it.
Like I said, I'm not bashing Patrick or his co. Just might go a different route this time.

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Pandora's Box

· #5 · Jul 23, 2012

Are you the original owner of your Pro Systems carb?

Did you discuss your issue with Patrick?

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wht73

Discussion Starter · #6 · Jul 23, 2012

Pandora's Box said:
Are you the original owner of your Pro Systems carb?

Did you discuss your issue with Patrick?

Yes I'm the original owner of the carb and I did call about a hesitation I had with it.
I didn't expect a second differance between the two carbs...maybe a couple 10th's tho would have been good.

Like I said it's possible that I just had it dialed as good as that old combo could get with the old carb with the old seat of the pants dyno n vacant road.

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wht73

Discussion Starter · #7 · Jul 23, 2012

I even e mailed him about using the carb on my new 406 and he said to sell it to offset the cost of the new carb and I would need at least a 840cfm with a small venturi/large throttle blade as the 780 will really slow the car down with the smaller throttle blades act as a restrictor plate on our program .

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