Holley street avenger carb [Archive] - Chevelle Tech

: Holley street avenger carb


Hot66ss
Feb 18th, 01, 1:21 AM
Well, due to an engine fire in my elco (read elcamino fire in bench racing) I need to replace my holley 650 single inlet carb. I went down to the local performance shop and he immediately told me I should replace it with a 570cfm Holley Street Avenger duel inlet carb ($$300).I asked him if this carb would be big enough and he insured me it would be and that it flowed more then holleys advertised 570cfm rating. My elco is running a 355, edelbrock intake, thorley headers, MSD box with HEI with a crane 272 cam and a few other goodies, just a mild daily driver 355. Is this 570cfm carb going to cut it for me?? Has any one used this carb of know anything about it?? looking for any and all impute and information on the subject I can get. Heres Hollys link to the carb, it does sound very nice, but 570cfm?? hmm
http://www.holley.com/HiOctn/ProdLine/Products/FMS/FMSC/0-80570.html

Thanks very much

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Thomas (AKA Hot66ss)
66 Super Sport (http://chevelles.com/showroom/myss.jpg) Now striped frame off Project
67 Malibu (http://chevelles.com/showroom/hot66ss4) getting there. Soon to be 396
69 El camino Beater (http://chevelles.com/showroom/hot66sselco) 350 4 speed (Daily Driver)
Aces Member 2380
Team Chevelle member #262

bottlerat
Feb 18th, 01, 5:18 AM
I don't know anything about those new carbs. but i don't think 570 cfm is going to be enough.i just built a 327 for a guy... dart iron eagle heads 507/510 lift comp cam, performer rpm intake, hooker super comp headers. and i used a 650 double pumper it works great!!! all i had to do was adjust the mixture screws and it was in there. smokes the hides threw third gear.

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Don Edmonds
T.C.Member 1033
1969 Chevelle
2000 Harley softail deuce
www.bottlerats69.homestead.com

Fine69
Feb 18th, 01, 8:08 AM
Vac secondary carbs are very forgiving if you over carb. How did your 355 run with the 650? Jump up to the 670 avenger and you'll gain some flow if needed and can adjust when the secondaries open if it's too much. I have heard good, good, good things about these new Holleys. If the budget can stand it, I will be replacing my 780 with one.

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...Dennis
Topless '69 (http://home1.gte.net/ddunio/topless69)

Hot66ss
Feb 18th, 01, 1:28 PM
The 650 carb that was on there was an emissions carb so it was jetted lean (59 primaries) so I was just getting to the point of dialing it in. I replaced the 59 primarys with 66's its ran way harder in the upper rpm's but it was running way rich and stumbled off the line. I put some 64's in and this is when i had the fire. i guess I'll go and get a 670 avenger. I wonder how much more the 670 is gonna cost me, oh well. any thoughts on this would be appeciated

Thanks

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Thomas (AKA Hot66ss)
66 Super Sport (http://chevelles.com/showroom/myss.jpg) Now striped frame off Project
67 Malibu (http://chevelles.com/showroom/hot66ss4) getting there. Soon to be 396
69 El camino Beater (http://chevelles.com/showroom/hot66sselco) 350 4 speed (Daily Driver)
Aces Member 2380
Team Chevelle member #262

obsessedwithmy72
Feb 18th, 01, 6:41 PM
Are you sure he didn't recommend that carb just because he had it on his shelf gathering dust http://www.chevelles.com/forum/wink.gif Why not go with a street demon 625? You will have to fork out a few more bucks for the BG fuel line.

Mike

JimiHendrix
Feb 18th, 01, 6:54 PM
Hey, I am currently in the process of putting in a 355 sbc in my 67 chevelle. My engine combo is very similar to yours. I went with the 670 cfm Holley Street Avenger and have only good things to say about it. I don't have the engine in the car, running yet, but so far the carb has givin me no troubles. 670 cfm should be just right for your engine. The 570 may be a bit small. Well, best of luck to you in what ever you decide.