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Old 12-31-2011, 05:23 PM
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Holley Aluminum VS Traditional

Ok everyone has convinced me to go with the Holley 650 DP.

My question now is should I go with the polished aluminum or traditional steel version? Do you guys have any thoughts? Besides the price being a little extra? Is there any performance differences besides the weight? I don't know like heat or warpage, etc? I think the finish would last longer on the aluminum?

Again anything you can give me is appreciated. Thanks

http://www.summitracing.com/parts/HLY-0-76650BK/

http://www.summitracing.com/parts/HLY-0-4777C/

Dave

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Old 01-01-2012, 07:16 AM
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Or how about the Holley Street Avenger? What do you guys think of this one?

http://www.summitracing.com/parts/HLY-0-80681/

Thanks
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Old 01-01-2012, 07:43 AM
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I would avoid aluminum carbs as they tend to vapor lock in the summer.

I would save some cash and get this carb.

http://www.summitracing.com/parts/HLY-65-3310/
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Old 01-01-2012, 11:28 AM
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Quote:
Originally Posted by 454C10
I would avoid aluminum carbs as they tend to vapor lock in the summer.

I would save some cash and get this carb.

http://www.summitracing.com/parts/HLY-65-3310/
Looks like real good advice to me.
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Old 01-01-2012, 07:57 PM
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I agree with the 3310 reman. That 3310 is a great street carb IMHO and is pretty easy to tune. The DP's are harder to dial in and for street use I'd stay away from it.
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Old 01-02-2012, 08:19 AM
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Well I will throw my two cents in here. There is a difference in weight on the two carbs I once had the aluminum 670 street avenger and out of the box something was wrong with it as engine would run fine then all of a sudden it starved for fuel. Something was wrong with the metering block.

I sent it back got a replacement and it was fine for the most part but for some reason it seemed very lean and jetting up and tuning the pump shot never helped. So long story short I went ahead and got a traditional zinc 670 holley street avenger and it did not have all the problems like the aluminum one did and just a jet change and some minor adjustments it ran fine on my engine.

I am currently running just a holley 600 cfm 1850s model at the moment which is similar to 670 just with different fuel bowls and 70 cfm less flow. Not saying there bad or anything they are good carbs and I never had any problems with vapor lock during summer or anything with the aluminum ones. I have a proform 650 all aluminum carb on my other truck and it runs like a charm with no problems.

Main thing with either carb is not to run any fuel with ethanol in it cause if it gets any moisture in it you will have all kinds of problems with it eating up your gaskets and maybe even your carb as it has happened to some on here. Bottom line I think only advantage of aluminum is the shine will last longer and easier to polish and less weight.

Most of the aftermarket company's such as quick fuel and others are getting away from zinc carbs and making nothing but aluminum ones so there is something to think about there. The old holley 3310 750cfm and 1850 600cfm carbs are some of the best and easy carbs to tune for a street engine.

Quick fuel also cam out with a new line of carbs called the street slayer and they are about the same price for a brand new 3310 but with way more tuning features and have jet changing ability in the rear and changable air bleeds as well you might want to check them out as well.
Take care

Eric
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Old 01-02-2012, 08:39 AM
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Quote:
Originally Posted by eric32
Quick fuel also cam out with a new line of carbs called the street slayer and they are about the same price for a brand new 3310 but with way more tuning features and have jet changing ability in the rear and changable air bleeds as well you might want to check them out as well.
Take care

Eric
I just checked those carbs out
vacuum secondary carbs
mechanical secondary carbs
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