carb decesion - Team Camaro Tech
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post #1 of 11 (permalink) Old May 23rd, 13, 08:21 AM Thread Starter
Rick
 
Join Date: Feb 2013
Location: Springfield Mo
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carb decesion

Hey everyone looking for a new carb.
Issues with holley 670 avenger hesation off idle hear its a pretty common issue..
Anyone have or tried the new street demon trying to decide between that or the elebrock
had decent luck in past with them just not the performance
of a holley any help greatly appreciated thanks.
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post #2 of 11 (permalink) Old May 23rd, 13, 08:34 AM
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Ty
 
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Re: carb decesion

Without knowing more about your problem, it could very well be something else and not the carb.

Anyway, I am partial to the Quick Fuel Carb.
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post #3 of 11 (permalink) Old May 23rd, 13, 08:58 AM
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Guess
 
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Re: carb decesion

How old is the 670 Avenger? Has it been cleaned? Has it been tuned? Has it been tuned on that engine?
If all it needs is some tuning, you're not going to fix the issue with another carb... it'll need tuning as well.

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post #4 of 11 (permalink) Old May 23rd, 13, 10:14 AM
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Re: carb decesion

What Joe said is dead on correct. All carbs need to be tuned to the engine.

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post #5 of 11 (permalink) Old May 23rd, 13, 10:44 AM Thread Starter
Rick
 
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new carb choices

Hi everyone I am sure this is a pretty common question but been having trouble with
my volley. Its a 670 avenger has an off idle hesation that I can't seem to get rid of.
Tryed adjusting mixture screws does not help so ready for a new carb.
Anyone tried or know anyone that has the new Barry grant street demon.
Only other real choice is an eldebrock have had them in the past but they just don't have
the performance of the volley.
So any help would be great just can't live with hesation issues I've been having with the holleytganks again..
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post #6 of 11 (permalink) Old May 23rd, 13, 11:09 AM
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Re: carb decesion

I combined your two threads about the carb, because you only need to post one thread about the same subject.

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post #7 of 11 (permalink) Old May 23rd, 13, 12:02 PM
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Chet
 
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Re: carb decesion

What size engine?
Cam specs?
Vacuum reading at idle?
What is intial timing set to on engine?

Get the idea? Not a single carb out there that can't be tuned to an engine unless there is a physical problem with the carb itself. Most carbs are set pretty close from the factory but still need tweaking.
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post #8 of 11 (permalink) Old May 23rd, 13, 12:51 PM Thread Starter
Rick
 
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Re: carb decesion

Thanks foe the input .
Engine is tuned pretty well runs decent other than the off idle hesatio .
Engine is 350 with vortec heads dual plane intake cam is comp cams

274 high energy really no other issues other than the hesation
which I hear is a pretty common problem with avenger carb.
The hesation is wright around 1800 rpms so if you try to ease into
the throttle that's when you get rhe hesation mash it a little harder
not so noticeable.
The accelator pump seems to be ok no slop in the linkage.
Thanks again.
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post #9 of 11 (permalink) Old May 23rd, 13, 01:07 PM Thread Starter
Rick
 
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Re: carb decesion

Sorry left out a couple other specs timing is set about 38 degrees total
I believe no pining or nothing though.
Turbo 350 trans with 10 inch converter not sure what gears in rear
Had a eldebrock performer on it for awhile ran ok just didn't
have that performance that the holleys do.
Really don't think its a tuning issue though could be wrong
Thanks again.
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post #10 of 11 (permalink) Old May 23rd, 13, 01:16 PM
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Tom
 
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Smile Re: carb decesion

Try setting the transfer slots. Do a search on them. Has been discussed many times.

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post #11 of 11 (permalink) Old May 24th, 13, 05:14 AM
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Chet
 
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Re: carb decesion

Transfer slots, pump shot, spring that controls rate of secondary opening, are all things that need to be considered. Total timing is useless. Need to know INITIAL TIMING, also need to know if you are running ported or manifold vacuum.
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