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  #16 (permalink)  
Old 10-13-2010, 03:43 AM
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Quote:
Originally Posted by sqzbox
You need to run a 2 bbl. The streets will be safer for everyone!
think its safe now,wait till she gets new trans,stall and gears
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  #17 (permalink)  
Old 10-13-2010, 05:28 AM
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Afb

My experience is with a pontiac 350. A carter Afb worked great on mine.Though out of production now, it is rock reliable and sized at 625cfm perfect for a mild 350 ci eng.

With the long stroke and good breathing heads of the poncho. The throttle response was instant when you cracked the secondaries.

if you can find a used one........definately don't overlook the old Carter AFB
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Old 10-13-2010, 07:09 AM
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I've had a holley vac secondary 750 on a 383 stroker (86 Monte Carlo, 200r4, 373 rear, street slicks) for 20+ years. Ran good until this summer when I changed the bowls to pretty aluminum with glass sight holes. After weeks of adjustments I still have an occasional stumble when taking off from near idle. It's related to the accel pump and cams I know. Currently using a 37 shooter, 30cc pump (going to try a 50cc), yellow secondary spring.

Car never bogs, never blows smoke, has no choke (I'm in NYC) but needs warming up, idles good, can't complain. Stock jets, stock secondary metering plate, etc etc. My only changes: 4.5 power valve, secondary spring, accel pump shooter, pump cam, fuel pressure regulator with a mechanical fuel pump.

I will say that the 'out of box' version ran great. Had less issues with it stock.
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Old 10-13-2010, 11:14 AM
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Quote:
Originally Posted by 355ci
Ive seen lots of opinions on the best way to carb a 350.but its not that easy.the 350 is a very diverse little motor.from mudding to towing,to drifting and dragging.a lot effects the way we carburate.gears,cam,stall,intake,power band range.a lot of times u read people arguing there difference in opinion.well the difference is welcome here,more for me to study.ive seen all kind of things on top a 350.from 390cfm to 1050cfm. and there owners defend it.I'd like to know what u have and what works for u.what brand do u like,why?I have a 86 iroc-z.1992 L98 block .030 over,zero decked sealed power flat top hyper.pistons,felpro 1010 head gaskets,39 quench,LT4 Hot Cam,218in 228ex @ .50 525in 525ex lift,112 lobe.lunati roller lifters,lunati 7.29 pushrods,procomp 190cc heads i nad them assembled and ported at machine shop.1.6 stainless steel full roller rockers,air gap rpm intake,hooker shorty headers,full hooker exhaust,billit summit dizzy,with accel super coil,edelbrock #1711 130gph mechanical fuel pump.700r4 with shift kit.i think the rest is stock.i dont know the gears,but i know some of u guys know formulas so the car reads 2000rpm @ 60mph,fourth gear is .70,tires are 255-50-16.i have a 750 holly,750 Q-jet,650dp holly,and iv had a 750 eddy on it.i must say the carb fomula has hold true for me.i also have a summit 600cfm that i put 50cc accelerator pump in.im ok at basic carb tuning.my 600 is instant off idle and pulls hard though the range.yhe 650 dp feels a tad shronger 4000+ but the low end trade of aint worth it.my 600 will brake the rear loose at 50-55mph.it feels the best on my motor.i play with my car a lot.light to light,and any time i pull up to a mustang.my speedo only reads 145mph but its still pulling strong. i lke 600cfm and holly on mine
Do any of u know the formula to find out geaars?Whats my rear gear?
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  #20 (permalink)  
Old 10-13-2010, 11:43 AM
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Quote:
Originally Posted by FastOrange
Q-Jet on a stock motor

i bought a new Holley 670CFM Street Avenger for my 350, i love it, worked great right out of the box.
Same here, Holley 670cfm, Street Avenger,vac secondaries. No problems, just a minor air/fuel adjustment and works great. The electric choke works great as well.
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  #21 (permalink)  
Old 10-13-2010, 11:44 AM
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I run a 650 double pumper on my 350.
882 open chamber heads give me about 9:1
Cam is a crane 284h pretty mild but a bump up from performance stock. My Holley has the choke horn but its wired open right now. My truck is garaged and only comes out when the temp is above 60 degrees. The mechanical secondaries require a little getting used to. I also run 3:73 gears and the truck only weighs about 3500#

If you are looking for cold start reliability and simplicity on a mild engine you might try a 750 carter. I have one on the stock 454 in my boat. I starts cold and runs pretty good.
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Old 10-13-2010, 12:49 PM
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QUESTION? How do cars go fast with little carbs?Like NASCAR uses like 500cfm.I know a guy
that has a dodge 440 that hauls butt with a 390cfm.HOW?
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Old 10-13-2010, 01:41 PM
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Quote:
Originally Posted by 355ci
QUESTION? How do cars go fast with little carbs?Like NASCAR uses like 500cfm.I know a guy
that has a dodge 440 that hauls butt with a 390cfm.HOW?
Huh, say what! I did not know that was possible.
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Old 10-13-2010, 01:45 PM
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Quote:
Originally Posted by 355ci
QUESTION? How do cars go fast with little carbs?Like NASCAR uses like 500cfm.I know a guy
that has a dodge 440 that hauls butt with a 390cfm.HOW?
I would like to know the same thing
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Old 10-13-2010, 02:03 PM
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should try to use a line break every now and then when you post. Your post was very hard to read all together like that.

I think you have a 3.36 gear assuming a 26 inch tall tire and a 0.72 OD.

I would use a holley 3310, 750 vacuum secondary. durable, cheap, easy to tune, doesn't vapor lock easily, looks good.

notice the nice line breaks after each group of related statements? Makes it much easier to read.
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Old 10-13-2010, 02:14 PM
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Quote:
Originally Posted by 454C10
should try to use a line break every now and then when you post. Your post was very hard to read all together like that.

I think you have a 3.36 gear assuming a 26 inch tall tire and a 0.72 OD.

I would use a holley 3310, 750 vacuum secondary. durable, cheap, easy to tune, doesn't vapor lock easily, looks good.

notice the nice line breaks after each group of related statements? Makes it much easier to read.
In reference to who?
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Old 10-13-2010, 02:47 PM
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well, though it was obvious after reading the first post.

So, of course I was referring to the original poster for not using line breaks and who happens to also be the only guy who wants to know what gear ratio he might have (another clue).

But, I'll try to be more pointed with my replies in the future.

thanks.
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Old 10-13-2010, 03:07 PM
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Sorry about the bad typing. I can't type. I have a 3310. It's a good carb.It's just not as good as my 600cfm at low rpms. Maybe it's the summits annular boosters. The 600cfm is the only one that no matter how soft i push the gas i feel it. I think a big thing is tuning the fomrula size carb or close as possible to it. My 600cfm was already SO close OUT OF THE BOX it made tuning a breeze. my larger carbs might make a litle more power,5 to 10hp 6000+rpm. ,but in real world driving i can't feel it. But i can feel the small one down low. My car wieghs 3400 with me in it. And comes alive off idle. I can feel every little thing. I would have to over pull my tv cable to rev any higher were i would NEED a bigger carb imo. If I'm wrong please educate me. I want to learn all I can. I enjoy reading what people think and know.
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  #29 (permalink)  
Old 10-13-2010, 03:14 PM
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So your speedo reads 145 and you are still pulling hard Hummmm!!!!!!!!!, how fast are you going then? You think and do you think your speedo is correct at that ?


Cole
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  #30 (permalink)  
Old 10-13-2010, 03:18 PM
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Quote:
Originally Posted by 355ci
QUESTION? How do cars go fast with little carbs?Like NASCAR uses like 500cfm.I know a guy
that has a dodge 440 that hauls butt with a 390cfm.HOW?
Huh say what i am running a Holley 830 p Series carb and it was a official nascar carb at one time anyway. Hummmm has something changed? Where you at Cobalt ?



Cole
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