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Old 05-04-2003, 06:53   #1 (permalink)
wes
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holley carbs

bit of a carb problem, got 600holley with vac 2's (brand new) on mild 351 clevo, no choke (auto/manual) ... unless engine is getting up to operating temp forget about moving, touching the throttle seems to just flood and kill the eng.... but when its warmed up a bit (say after 5mins or so) look out (onto 2nd set engine mounts!)
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Old 05-04-2003, 07:08   #2 (permalink)
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Welcom to the world of holleys :)

but seriously,
check the float levels first, and is it flooding, or leaning out ?
Usually flooding will occur more when hot, not cold.

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Old 05-05-2003, 01:54   #3 (permalink)
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float levels ok, tips of the exhausts bit black maybe jetted too high??? doesn't blow any smoke at idle or under accel (not that i can see anyway)
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Old 05-05-2003, 02:28   #4 (permalink)
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Why no choke, that's what they are there for. That would be the first thing I would fix for your problem.

It may be that you need a bigger accel pump cam. Does it flatspot when you floor it when hot?
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Old 05-05-2003, 03:34   #5 (permalink)
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Cs123

Although its there, no Holleys like choke, regardless of what anyone tells you.
Thats just the way they are......

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Old 05-05-2003, 04:19   #6 (permalink)
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Have a look at http://www.holley.com sepeciallyn http://www.holley.com/HiOctn/TechSer...o/FMCTech.html and http://www.recarbco.com/technical/newtrouble.html
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Old 05-05-2003, 04:23   #7 (permalink)
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Check out for intake manifoid leaks, then make sure you have right power valve, use vacuum gauge. Worth a try.
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Old 05-05-2003, 04:31   #8 (permalink)
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get the jetting checked. My 750 was very dicey until I got it rejetted and now it purrs even when cold... but I still don't get too excited until it's warmed up a bit
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Old 05-05-2003, 04:34   #9 (permalink)
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Quote:
Originally posted by 9psi EB
Cs123

Although its there, no Holleys like choke, regardless of what anyone tells you.
Thats just the way they are......

9psi EB
I've never seen a Holley used in street applications that had a choke problem. Most problems I have seen have been from people not setting them up properly.

I have seen Holley's that have been extensively modified to remove the choke and air horn but a 351C running a 600cfm Holley should have no problems.

Can you elobrate on the problems they have?
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Old 05-05-2003, 05:57   #10 (permalink)
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Quote:
Originally posted by cs123
Why no choke, that's what they are there for. That would be the first thing I would fix for your problem.

It may be that you need a bigger accel pump cam. Does it flatspot when you floor it when hot?
had same carb on previous eng with no choke, never had any probs. But sometimes when you tramp it it does miss, but not always. It runs c4 auto, if u hold it in 1st and dump it sweet, but sometimes when in drive is when it tends to stall out
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