Carburetor size Question

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I had used a 500 cfm on a 318 cop car motor with 360 heads and a mp 340 cam in the mid 90's, only thing i did to it was change the cam and that thing was alot of fun. So I then went to a 625- carter- made it more fun. Then I went to hell with it and put a 750 manual choke afb- that carb made a big difference right out of the box. So it depends on what you want to do. i know they say too much carb blah blah blah, but i have found some engines like a larger carb when it should not call for it. And i have found engines that perform better with a smaller carb. Based on what you have i would try a 750 avs/ afb or a Holley equivalent.
 
Yeah, someone got up on the wrong side of the bed this morning. He straightened his mistake out, and you kept busting his balls?
Get a life.
 
CRUZE 418 said:
Yeah, someone got up on the wrong side of the bed this morning. He straightened his mistake out, and you kept busting his balls?
Get a life.
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I have only one side of the bed to up on.....he post the wrong part number for pistons....I post that they are the wrong ones.....so I am the asshole for pointing that out...LOL...So next time I will say go for it...order them...LOL
I only commented on the information that was posted......

Get a life.....that is funny......how about post the right ****...LOL.....so someone points out something is wrong....they are the asshole...FO
 
CRUZE 418 said:
Yeah, someone got up on the wrong side of the bed this morning. He straightened his mistake out, and you kept busting his balls?
Get a life.
Click to expand...

We have angered one of the FABO Gods. May we repent and grovel for mercy.

@70aarcuda Please forgive me for I have got one digit wrong. The information “bouncing between my ears” has failed me. May 107’s be replaced by 167’s for the rest of my days. Please forgive me, I am not worthy of your advice.
 
I aint no FABO God.......I just corrected your wrong information....and you dont like the fact I pointed out that you can not run those pistons and a 3.31 stroke crank....You get over it...
People answer your post with correction...and you get all bend out of shape...Next time I will just say....great combo...those kb107 will fit that 318...with the 3.31 crank.....Go for it....

And you wonder why alot of people quit trying to help......
 
I see a picture of alloy heads; are those going on?
At 9.75 Scr?

If yes, then the 224 cam well do well, altho the next smaller cam will make more pressure and thus more low-rpm power.
The 224 will powerpeak up around 5000 with headers, which with 3.23s and say 225/75-15s is about 46 mph in First gear. If the power march starts at 3000, with no tirespin, that would be 28 mph .....
jus saying
 
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70aarcuda said:
I pointed out that you can not run those pistons and a 3.31 stroke crank....You get over it...

People answer your post with correction...and you get all bend out of shape...Next time I will just say....great combo...those kb107 will fit that 318...with the 3.31 crank.....Go for it....
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Well, the KB167's are already installed. Wasn't asking about which pistons to use. I just accidentally typed 107 instead of what is already installed, KB167. Seems like you didn't actually comprehend the post and focused on one piece of information that happened to be a mis-type.
And Buddy, I didn't get bent out of shape. I just commented on you being grumpy like someone pissed in your Wheaties. I think it's kinda funny actually. Calm down fella.
 
AJ/FormS said:
I see a picture of alloy heads; are those going on?
At 9.75 Scr?
Click to expand...

Thanks for the reply.

Yes, those are the Speedmaster heads. The builder has blended the bowls and done some other work. I asked today to remind me of the CR. I thought he had said 9.5:1 before but he said it will come in closer to 9.75.

I was planning on running a 275 or 255/60-15, 28" and 27.1 respectively.

My drives in this truck are going to be in mountainous terrain/ canyons, rolling hills, and a fair amount of interstate. I live out in the sticks and I can drive 15 minutes to get to the interstate (70-75 mph or 112-120 kph) or go the scenic route to the big city which is avg. about 45-55 mph (72-88 kph). It's 45 minutes interstate or about an hour taking the scenic route to get to the city if I'm hauling ***.

I'm looking for performance in that type of driving rather than from a stop.

Would you recommend going with a 3.55 gear with that tall of a tire? I leaning toward those tire choices because I have 15x8's and I want to fill the wheel well as much as I can on the truck.

Looking at Spicer Engine RPM Calculator
it looks like I might want to go witht the 3.55.
 
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I have 255/60/15's on my Dart with 3:55's, rpm at 55mph is 2500. If you are driving that far, I would go 3:23, maybe 2:76, but that's just me. It doesn't sound to me like you want drag strip fast. She's gonna go through gas if you run her hard.
 
IMO, I would go with the smaller tire and one cam size down. Drop 8*’s on the cam with a stock converter.
Or up the converters stall and stick with your cam and still run the 27 inch tire with the 3.55’s.

AJ & I both run cams @ 224@050.
I run a 26” tire w/3.55’s. The engine is a .030 over 360.
The converter is a few hundred above stock. That would be relatively tight.

Keep on the tune, carb and distributor.

EDIT — Sorry, I wasn’t thinking truck. I was thinking A body.
 
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CRUZE 418 said:
I have 255/60/15's on my Dart with 3:55's, rpm at 55mph is 2500. If you are driving that far, I would go 3:23, maybe 2:76, but that's just me. It doesn't sound to me like you want drag strip fast. She's gonna go through gas if you run her hard.
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With 3.23’s and a 255 tire it would be 2270 rpm @ 55 mph. A 275 tire would be 2189 rpm @ 55 mph.

A 3.55 rear and 275’s would be 2400 rpm @ 55 mph. As you stated, 3.55’s and a 255 would be 2500 @ 55 mph.

The MPG choice would be a 2.76:1 with the 275 tire putting it at 1870 rpm @ 55 mph.

Leaning toward a 275/60-15 with 3.23’s.
 
The only reason I suggested those was because it sounds like you have to do alot of hiway driving.
The 275's and the 3:23's might work for you, it won't be a speed demon, but at least you can get out on the hiway.
Good Luck!
 
go-fish said:
A 275 tire (w/3.23’s) would be 2189 rpm @ 55 mph.
Leaning toward a 275/60-15 with 3.23’s.
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This above is correct?
But do you travel this speed as a norm?
Do you travel the interstate?
What is the normal interstate speed and at what rpm would that be for this combo?
What would it be for 70/75 mph?

I’m curious. So far, for the elevated speeds, I’m mentally guesstimating the rpm may fall into the cams sweet spot where it is really more efficient.

Thanks
 
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rumblefish360 said:
This above is correct?
But do you travel this speed as a norm?
Do you travel the interstate?
What is the normal interstate speed and at what rpm would that be for this combo?
What would it be for 70/75 mph?

I’m curious. So far, for the elevated speeds, I’m mentally guesstimating the rpm may fall into the cams sweet spot where it is really more efficient.

Thanks
Click to expand...

Good point. For me, I probably need to gear for the interstate speeds with this particular vehicle. If you aren’t going at least 70 mph in Southern California you’ll get ran over.

In a BFG Radial T/A the 255/60-15 is 27.1” and the 275 is 28”

For you and A/J @ 75 mph it would be 3500 but driving a more conservative 65 you would be at 3000 rpm.

One thing to keep in mind is that a D100 is about as aerodynamic as an open umbrella in a hurricane.
 
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Just don't go 75. I ran my 65 with 4.30s and 28 11.50 ET Streets for over three years on the street....and interstate everyday. 55 it was around 2700-2800. It wasn't even breathin hard. With 3.55s at 55, it'll be a cakewalk. It never bothered me to go 55.
 
@go-fish I made a edit to my post stating my thinking was a mistake. I wasn’t thinking truck but car…

But yea! I was concerned with interstate driving speeds. To small of a tire and the limitation of a 1:1 final drive ratio can leave the car (or truck LOL) hummmming a little high.

If you had it in your wallet, I’d suggest a OD in the future. This would help make the vehicle more flexable on the get up and go with the low gear and EZ revs on the Hwy. Yup! I know, EZ’er said than done while I’m internet cash spending your money.
 
rumblefish360 said:
@go-fish

If you had it in your wallet, I’d suggest a OD in the future. This would help make the vehicle more flexable on the get up and go with the low gear …
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Gear Vendors is about 45 minutes away from me. Drive right past them when I go to San Diego.
I have called them about return units or seconds/ blems but they said they don’t have anything like that so buying a new unit is what I would have to do.
 
go-fish said:
Gear Vendors is about 45 minutes away from me. Drive right past them when I go to San Diego.
I have called them about return units or seconds/ blems but they said they don’t have anything like that so buying a new unit is what I would have to do.
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Holy crappola Batman. A GM 200 and adapter kit would be cheaper I believe.
 
go-fish said:
Gear Vendors is about 45 minutes away from me. Drive right past them when I go to San Diego.
I have called them about return units or seconds/ blems but they said they don’t have anything like that so buying a new unit is what I would have to do.
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Just get an A500 or A518. As close to a bolt in as u can get. Any wrecking yards near u? Kim
 
oldkimmer said:
Just get an A500 or A518. As close to a bolt in as u can get. Any wrecking yards near u? Kim
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Oh, yes! Big one down by the border. I might just try to secure one Kim. Thanks for throwing that out there.
 
That’s the one thing I would never ever do is a GV-OD. Way to expensive. The OE units will work fine. Before I go to a GV, I’ll spend on something else. IDGA CRUD how’s trans it is.
go-fish said:
Gear Vendors is about 45 minutes away from me. Drive right past them when I go to San Diego.
I have called them about return units or seconds/ blems but they said they don’t have anything like that so buying a new unit is what I would have to do.
Click to expand...
 
Getting back to the carb. The 500 AVS with the better breathing heads, bigger cam & dual plane intake will work well & give great response & economy. But if you wanted to get a little more hp from the new parts, the 650 AVS2 would be better. Economy & throttle response would still be great because the '2' version has annular primary boosters.
 
Bewy said:
Getting back to the carb. The 500 AVS with the better breathing heads, bigger cam & dual plane intake will work well & give great response & economy. But if you wanted to get a little more hp from the new parts, the 650 AVS2 would be better. Economy & throttle response would still be great because the '2' version has annular primary boosters.
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Yeah, got a little off track there but it brought up some good things to think about.

The truck had a Carter AFB 9605 600 cfm on it. I had heard about the tunability and crisp throttle response of the Edelbrock AVS2 so I bought one and was pleased with it on the 318. Took a bit to tune it (my inexperience) but it did live up to the reputation as having really responsive throttle inputs. Given that experience I would be inclined to go with another in 650 cfm form.

I will definitely hang on to the 500 cfm one I have and break the engine in with that. It's good to hear other options. Thanks for the input, guys.
 
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