holly street avenger 670

bodean · 09-21-2010, 05:49:45 PM

would any one be willing to maby gimme a lil advise on giving me a safe setting to start with this holley 670. concerning my fuel setting screws. just to insure it will even start so i can break this fresh 355 in.carb is new still in box .if someone has the time and feels like it ide say a big thank u to you sir

80-z28 · 09-21-2010, 06:24:52 PM

I bolted mine on straight from the box and it ran fine, only needed a small adjustment to the idle screws.

bodean · 09-21-2010, 06:27:43 PM

i havent opend mine yet.if i understand u rite are u implying the fuel mixture screws already have a factory set to them or are they closed or open all the way.would a turn an a half be a little to far to start with

jthomas · 09-21-2010, 06:46:01 PM

The Street Avenger carbs are wet flow tested and set at the factory. The settings are very close to what you need right out of the box. Bolt it on and fire it up. Do the initial breakin and then fine tune the carb after that.

bodean · 09-21-2010, 07:20:33 PM

thanks for taking the time.i am curious .if i made the perfect carb selection . heres my engin specs.355 flat top pistons202 heads ported and polished with true roler rockers screw in studs guides as well stock hyd lifters. performer intakeis stock in configureation . cam has .214intake 224 exhaust.. 2000-4500 rpm range. 288 intake 298 exhaust adv. duration. @.050. valve lift 443 intake 465 exhaust lobe c/l 112.

CamaroMan79 · 09-21-2010, 07:55:55 PM

You probably could of gotten away with something a little smaller, but that 670 will still be a nice carb for that engine.

CorkyE · 09-21-2010, 08:12:37 PM

Bolt it on and go... Like said, they're pretty much set out of the box. Buddy of mine has ran one on a 383 in his 'vette for 5 years The idle is a bit high with choke engaged but he refuses to touch it.

DesmoEd · 09-21-2010, 08:47:22 PM

Idle screws 1.25 turns out and tune from there with a vacuum gauge

They are set up baseline but it wont hurt to verify settings

Sounds like a good carb selection but tranny and gearing are also important factors as well

5spd540 · 09-22-2010, 03:47:24 AM

Most of these carbs do not need a lot of adjusting on them if you have the correct carb for your motor.

jayb53guy · 09-22-2010, 08:39:22 AM

X5 on above mentioned. Bolt on and go. I swapped out the spring on mine to make the secondaries open quicker and that was it. Its a good carb butI prefer Demon.

bodean · 09-22-2010, 10:38:14 AM

I cant thank u guys enuff. an forgot to metion its a factory 4 speed car borg warner t 10 .373 gears. I hope im abel to achive my correct timing .using trusty ballancer tape hope she stays on .

marlin · 09-22-2010, 12:01:45 PM

Do you text alot................?

bodean · 09-22-2010, 01:30:12 PM

yeppers .ny I do..i mean mr. marlin

DesmoEd · 09-22-2010, 04:31:46 PM

Quote:

Originally Posted by bodean

I cant thank u guys enuff. an forgot to metion its a factory 4 speed car borg warner t 10 .373 gears. I hope im abel to achive my correct timing .using trusty ballancer tape hope she stays on .

If thats the case I prob would have gone with a 650 DP - vacuum carbs are great on automatics

Get a book on Holleys and learn the basics - they are very easy to tune if you know the different circuits and how they overlap.

The 670 SA has 2 corner idle - it will only have idle screws on the primary side. Lightly seat each one and count the turns. They should be the same and around 1-1.25 turns out.

Thats a good baseline setting

Let us know how the vacuum carb works on a stick/3:73 car

bodean · 09-22-2010, 08:27:03 PM

wonder if jegs will hassel me if I bolt it on an dont like it.then ask if they mind letting me swap it for that 650 dp.just got complete drive traine put bak in tonite .tomorrow will prime it .if all goes well then the pumping up oil preasure. and pullys goes on .trying real hard to fire it thursday nite .wife gone aheadan planed mny wk. end for me .rite when im nearing home base. im laughing my hind end off now