Thread: 283 question

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Originally Posted by NTFDAY

Tech,as I posted earlier in this thread I believe they were somewhere around 300cfm. I had a matched pair years ago and the front carb for all practical purposes was gutted. The throttle bores were about the size of a quarter.

I think the Dual Quad WFCBs had a rating of 385 CFM each. I run a pair on the street.

Bob

Originally Posted by Bob W

I think the Dual Quad WFCBs had a rating of 385 CFM each. I run a pair on the street.

Bob

We have over heading,over caming,here is an example of carburetors that are to large for an application.
A pair of 385's will flow enough air for a 327 that turns 8,100 rpm's.

Originally Posted by erik erikson

We have over heading,over caming,here is an example of carburetors that are to large for an application.
A pair of 385's will flow enough air for a 327 that turns 8,100 rpm's.

Maybe, but that's what Chevy used on the 1956 to 1961 265s and 283 dual fours. In stock trim they allways run a little rich.

Originally Posted by erik erikson

We have over heading,over caming,here is an example of carburetors that are to large for an application.
A pair of 385's will flow enough air for a 327 that turns 8,100 rpm's.

And a mildly built 265 will do the same thing. Been there done that and long before you were born.

Originally Posted by NTFDAY

And a mildly built 265 will do the same thing. Been there done that and long before you were born.

Good,someone else that knows something of air flow.

Originally Posted by erik erikson

Good,someone else that knows something of air flow.

It's a shame that you weren't around in the early to mid '50's, you could have been a great influence to Duntov and the Chevrolet engineers.

Originally Posted by NTFDAY

It's a shame that you weren't around in the early to mid '50's, you could have been a great influence to Duntov and the Chevrolet engineers.

Your sarcasm is great.
When do you take your act on the road?
What exactly is your point?
We have established you are old enough to be my father.
I have listed to a few of you older guys bable about the past,
make up complete BS stories in order to impress one and other.
I was born at night but not last night.
I have worked with performance engines for about the last 15+ years.
It pays my mortage and lets me live very well.

Originally Posted by erik erikson

Your sarcasm is great.
When do you take your act on the road?
What exactly is your point?
We have established you are old enough to be my father.
I have listed to a few of you older guys bable about the past,
make up complete BS stories in order to impress one and other.
I was born at night but not last night.
I have worked with performance engines for about the last 15+ years.
It pays my mortage and lets me live very well.

I wouldn't call it "BS Stories".

I still have my 283 race engine in the garage and I still drive my Dual Quad 57 Corvette .
I don't know much but I do know 283s and 265s. I learned alot racing Stock Classes at the drags when you had to use basicaly a stock bodied car and all the stuff to make it an assembly line looking car..

Originally Posted by erik erikson

Your sarcasm is great.
When do you take your act on the road?
What exactly is your point?
We have established you are old enough to be my father.
I have listed to a few of you older guys bable about the past,
make up complete BS stories in order to impress one and other.
I was born at night but not last night.
I have worked with performance engines for about the last 15+ years.
It pays my mortage and lets me live very well.

It never ceases to amaze me that when a position becomes untenable attacks on integrity are shortly forthcoming.

well then i better go tell the guy who has a 1050 dominator on his 350 hes wrong. car runs 10's but wait 1050 is impossible on a 350 isnt it? i helped assemble his new rear and front suspension he took a 301 out and put a 13-5-1 compression 350 in it with a 1050. the last 15 years? thats to new to know what were talking about 350iszed i say!

Originally Posted by gassersrule_196

well then i better go tell the guy who has a 1050 dominator on his 350 hes wrong. car runs 10's but wait 1050 is impossible on a 350 isnt it? i helped assemble his new rear and front suspension he took a 301 out and put a 13-5-1 compression 350 in it with a 1050. the last 15 years? thats to new to know what were talking about 350iszed i say!

Nobody said a 1050 wouldn't work. However comparing an all out drag car and it's carb requirements (or what you can get away with with a bunch of tuning) with the recomendation for correct carb sizing on a street machine is comparing apples to oranges..... If the old carb setups, like the dual quads on 327's and tri-powers on big blocks were still the hot set up, then that's what the aftermarket manufacturers would still be peddling... Just because it was the hot set up in '62 doesn't mean it is the hot set up today.... Yeah, it still works. Big deal.

Duntov and the boys did a heck of a job with the technology that was available and the parts they developed. I'm just really glad we aren't stuck with that technology today, a 275 horse small block just isn't that competitive anymore. And of course there are exceptions to that, too. If you think the old setups are still the best then by all means stick with them. Just don't try and of the new technology setups though, the performance improvements would scare the heck out of you!!!!!

Originally Posted by gassersrule_196

well then i better go tell the guy who has a 1050 dominator on his 350 hes wrong. car runs 10's but wait 1050 is impossible on a 350 isnt it? i helped assemble his new rear and front suspension he took a 301 out and put a 13-5-1 compression 350 in it with a 1050. the last 15 years? thats to new to know what were talking about 350iszed i say!

You are comparing apples to oranges.
Why not call Holley,Barry Grant etc. and ask them for a carburetor recommendation?
350 you say.
To use all of the 1050 cfm carb the engine would need to be turned to 10,300.All I can say is WOW!!!
Do your self a favor and call someone who knows carbs. if you don't believe me.

Everyones wrong the proper size for a race carb is one that gets the vaccume to less than 1 at wot,ideally you want almost 0 vac at wot .If you punch it to the floor and have 2in vac then you are not up to potential.

Originally Posted by shawnlee28

Everyones wrong the proper size for a race carb is one that gets the vaccume to less than 1 at wot,ideally you want almost 0 vac at wot .If you punch it to the floor and have 2in vac then you are not up to potential.

Ahhh,very interesting.

erik, you are talking about building a few motors, to suite your need. they are expensive and don't work well for the masses. GM and ford built some strong motors over the yrs, sold them to the masses, good h.p., reasonable priced, decent gas mileage and up to 6,000 rpm, they stayed together. you cant compare that to a motor you might build in your shop. you don't have to meet no smog rules either. most any good machine shop can build a better motor than GM, but they can't build millions of them, better than GM can.