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post #1 of 23 (permalink) Old Jan 16th, 09, 08:45 PM Thread Starter
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Logan
 
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carb choice

I need a new carb for my 68 camaro. Right now i have an edlebrock performer 600. I dont much like it at all, and plus i just dont think its enough carb for my motor. Its a 327 bored .60 over. a 290/297 duration cam, with a .490 lift. It has alluminum heads and alluminum roller rockers. I was thinking of either a holley double pumper 750, or a speed demon 750 with mechanical secondaries, or maybe even trying to find a good ole quadrajet. Im just looking for some different opinions and any help would be appreciated.
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post #2 of 23 (permalink) Old Jan 16th, 09, 09:30 PM
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Chris Robertson
 
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Re: carb choice

I recommend a lil less carb than what you are thinking. 650-ish, and I base that upon info and recommendations that were provided to me by ProSystems, Holley, AED carbs, and Quick Fuel Technologies.

But to be more accurate in giving advice, the following will help people give you a more educated answer:

What type of manifold?
What type of trans?
What rear gear?
What Compression?
What heads specs (runner size, chamber size, valve size)?
What is the intended use of the veh (street/strip, street, strip)?

Frost Green '68 Coupe (yes they made Camaros that year); Dart Alum headed, dynamically balanced 327; Mighty Demon 750; 4sp; Cal-Tracs Rear Susp; ProCar Rally 1000's seats; 15" Rallys. (pretty plain-jane)
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post #3 of 23 (permalink) Old Jan 16th, 09, 10:20 PM Thread Starter
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Re: carb choice

Its got a weild high rise dual plane intake, cant really remember what its called maybe a stealth. A TH 350 with 2800 stall speed. I dont really know the rear end ratio. Teh compression is somwhere around 10.1. Its got 2.02/1.60 68 cc heads.
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post #4 of 23 (permalink) Old Jan 16th, 09, 10:21 PM Thread Starter
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Re: carb choice

Its my street car that i may take to the strip on occasions.
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post #5 of 23 (permalink) Old Jan 16th, 09, 11:06 PM
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Re: carb choice

With that info I would agree with Chris a 600 or 650 is what you need. More carb would only hurt drivability. Now if this was a high winding strip set up then yes a 700 or 750 would be more in order but not for a mainly street driven car with a small cubic inch motor.


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post #6 of 23 (permalink) Old Jan 17th, 09, 04:17 AM
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Re: carb choice

Definately 600-650, vac secondary or mechanical sec. The Edelbrock carb that you have (easy fella's) is a decent carb and if tuned properly could be adequate for you combo, not to mention that you already have it and that saves you $350+.

Good Luck.

Frost Green '68 Coupe (yes they made Camaros that year); Dart Alum headed, dynamically balanced 327; Mighty Demon 750; 4sp; Cal-Tracs Rear Susp; ProCar Rally 1000's seats; 15" Rallys. (pretty plain-jane)
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post #7 of 23 (permalink) Old Jan 17th, 09, 06:50 AM
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Re: carb choice

i was running a 600 edelbrock and it was lazy.i bought a holley 650 dp at a swap meet for $75 bucks and put a $30 rebuild kit in it and wow what a difference.woke it rite up.like having a coplete different motor.my car has a smaller cam then yours but i think around 650 would do the same for you

clayton hicker
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post #8 of 23 (permalink) Old Jan 17th, 09, 10:10 AM Thread Starter
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Re: carb choice

Alright thank you all ill probally look into the 650 dp
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post #9 of 23 (permalink) Old Jan 17th, 09, 02:53 PM Thread Starter
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Re: carb choice

I should be able to get up in the 6500 rpm range with one of the 650s shouldnt I.
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post #10 of 23 (permalink) Old Jan 17th, 09, 03:25 PM
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Re: carb choice

Quote:
Originally Posted by Camaro55 View Post
I should be able to get up in the 6500 rpm range with one of the 650s shouldnt I.
A 650 will supply easily enough fuel & air to so support those RPM. Where (RPM-wise) did your engine make its' power at??

Frost Green '68 Coupe (yes they made Camaros that year); Dart Alum headed, dynamically balanced 327; Mighty Demon 750; 4sp; Cal-Tracs Rear Susp; ProCar Rally 1000's seats; 15" Rallys. (pretty plain-jane)

Last edited by C-ROB; Jan 17th, 09 at 03:27 PM. Reason: Clarification
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post #11 of 23 (permalink) Old Jan 17th, 09, 08:11 PM Thread Starter
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Re: carb choice

The top end kit thats on it is supposed to make it in the 6000-6500 range but who knows till it gets dynoed
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post #12 of 23 (permalink) Old Jan 18th, 09, 01:37 PM
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Re: carb choice

Holley street avenger carb 650.............whoa!! Right outta da box!!!!!!!
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post #13 of 23 (permalink) Old Jan 18th, 09, 04:47 PM
 
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Smile Re: carb choice

"Its a 327 bored .60 over. a 290/297 duration cam, with a .490 lift."

Sucker better be up at least at 11 to 1 CR by me here!

Otherwise if it is a regular almost 10 to 1 CR'd 327, a good old 268/270/272/274 cam will do you nicely.

Know all about this...

pdq67



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post #14 of 23 (permalink) Old Jan 18th, 09, 04:48 PM
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Re: carb choice

Quote:
Originally Posted by C-ROB View Post
Definately 600-650, vac secondary or mechanical sec. The Edelbrock carb that you have (easy fella's) is a decent carb and if tuned properly could be adequate for you combo, not to mention that you already have it and that saves you $350+.

Good Luck.
No disagreement from guys running Edelbrock carbs, the Performer carb is a disapointment, a well tuned AVS is another story.

That said, when I had a 327 set up like yours, I ran a 650 Holley street avenger right out of the box and was very happy.

Lane

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post #15 of 23 (permalink) Old Jan 18th, 09, 05:16 PM
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Smile Re: carb choice

I have an Edelbrock 600 CFM on my 327. I tried to tune a 750 holley on it and I was unable too. A 750 cfm square bore carb. is just too big for a 327. Usually what limits a 327 is the runner size of the heads. My vote NOW, would be for a Quadrajet. You will have a total venturi size of 750 CFM, but much smaller primaries for excellent street performance.

69 Camaro -originally a LM1 car. 327, Edelbrock E-streets, hooker, DUI performance distributors, ultradyne cam, stewart, TRW etc. Vintage Air, AGR steering, Corbeau GTSII seats, 700R4 transmission, 12-bolt w/Eaton 4.11:1
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