Holley Street Avenger 570 or 670?

wikdsvt

wikdsvt

Club Member
`Stock 302 with Cam, intake and headers,
However, this fall it'll be a 347 with aftermarket heads.

Which is the better Carb to use now and can still use when upgrade?
 
Stay away from that avenger series garbage. Just get a mechanical Holley 650. Easiest carb in the world to use.
 
wikdsvt said:
part number for 302? there are 100's of holley carbs and I get confused!
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There isn't part numbers for carburetors based on engine family. But almost ANY Holley carb that claims 650cfm with a mechanical secondary, and a dual feed will be great for you. You can get them in an electric or mechanical choke. Most popular and most advertised today are the ones with electric chokes it seems. Something like this is what you would want.

http://m.summitracing.com/parts/hly-0-4777c

It's inexpensive and will work great. It gets more costly if you want to "pretty" up the carburetors look. I've used this carb on bigger cubic inch engines and have even been decently fast with it in a 3,300lb vehicle. Of course this was after slight tuning.
 
camaromann said:
There isn't part numbers for carburetors based on engine family. But almost ANY Holley carb that claims 650cfm with a mechanical secondary, and a dual feed will be great for you. You can get them in an electric or mechanical choke. Most popular and most advertised today are the ones with electric chokes it seems. Something like this is what you would want.

http://m.summitracing.com/parts/hly-0-4777c

It's inexpensive and will work great. It gets more costly if you want to "pretty" up the carburetors look. I've used this carb on bigger cubic inch engines and have even been decently fast with it in a 3,300lb vehicle. Of course this was after slight tuning.
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Does that carb allow for the kickdown on a Ford AOD trans? That seems to be a problem that I'm having finding the right carb. Or is there an aftermarket piece to attach for the AOD kickdown.
 
wikdsvt said:
Does that carb allow for the kickdown on a Ford AOD trans? That seems to be a problem that I'm having finding the right carb. Or is there an aftermarket piece to attach for the AOD kickdown.
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They sell a seperate linkage for that. It's not uncommon at all. I've personally never used one for a Ford, but plenty of Chrysler products.
 
I'm rusty at Holley carb numbers but isn't an 80777 a 650 with C4 provision? I know back in the day they made a holley carb with a C4 Kickdown already installed.

Also to get away from Holley common issues check out AED. we've had a few and with tons of luck and the price is right. The avengers are junk.

Edit: Just noticed you are saying AOD, you have to purchase that adapter seperately.
 
I'm running a 670 Street Avenger right now, it's been pretty decent. What is everybody experiencing that makes them "garbage". It ran pretty decent right out of the box for me. Plugs have looked good, part throttle has been good, and I'm running it tonight at Milan, though I'll be messing with the trans cal more than carb tuning..

Sent from my DROID BIONIC using Tapatalk
 
beertestr said:
I'm running a 670 Street Avenger right now, it's been pretty decent. What is everybody experiencing that makes them "garbage". It ran pretty decent right out of the box for me. Plugs have looked good, part throttle has been good, and I'm running it tonight at Milan, though I'll be messing with the trans cal more than carb tuning..

Sent from my DROID BIONIC using Tapatalk
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EVeryone i've used have been hard to tune ran good one day, bad the next. And everyone i know who has used them said the same thing.
 
Billydroveit said:
EVeryone i've used have been hard to tune ran good one day, bad the next. And everyone i know who has used them said the same thing.
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Guess I'll find out when I start to do some tuning, but it has run pretty consistent for me. Not perfect, but decent for a carb. If I compare my runs between last fall and last Wed, the mph's have been pretty consistent, albeit a little slower this past week. I want to believe the 35 degree hotter ambient temp had a bigger part in that.
 
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