Holley Carb Gurus... Help..
Thread Starter
Pro
Joined: Mar 2003
Posts: 553
Likes: 1
From: Valparaiso IN
Holley Carb Gurus... Help..
Why is this carb so much cheaper than some of the other Holley 750s? Do I lose some of the adjustability or tuning ability? Anyone using this carb? <This is from the Summit catalog> I want to mate it to a dual plane RPM Air gap on this crate motor. What do you think?
Crate Engine
HLY-0-80508S
$267.95
Overview
Superior performance and drivability in an easy-to-tune pacakge.
Carburetor, Gasoline, 750 CFM, Electric Choke, Dual Inlet
Vendor Holley
Product Line Holley Model 4160 Carburetors
Number of Barrels 4
Carburetor Flange Square bore
Choke Electric
Fuel Gasoline
Secondary Type Vacuum
New or Remanufactured New
Fuel Inlet Dual
CFM 750
Carburetor Finish Silver
Ford Kickdown Yes
Booster Type (Not Specified)
Throttle Linkage Type Universal
Quantity Sold individually.
Notes (Not Specified)
Crate Engine
HLY-0-80508S
$267.95
Overview
Superior performance and drivability in an easy-to-tune pacakge.
Carburetor, Gasoline, 750 CFM, Electric Choke, Dual Inlet
Vendor Holley
Product Line Holley Model 4160 Carburetors
Number of Barrels 4
Carburetor Flange Square bore
Choke Electric
Fuel Gasoline
Secondary Type Vacuum
New or Remanufactured New
Fuel Inlet Dual
CFM 750
Carburetor Finish Silver
Ford Kickdown Yes
Booster Type (Not Specified)
Throttle Linkage Type Universal
Quantity Sold individually.
Notes (Not Specified)
Tech Contributor
Joined: Aug 1999
Posts: 14,380
Likes: 6,390
From: At my Bar drinking and wrenching in Lafayette Colorado
That model 4160 is their entry-level carb. It does not have a secondary metering block (uses a stamped steel plate), the parts and components are crudely finished, and it does not have idle fuel discharge on all 4 barrels (no idle fuel crossover passage in the baseplate). Therefore, it does have limited tuning capability, and it's not the best choice for a well-cammed engine. The carb will run reasonably well on near-stock engines and mild mods, but the higher-end carbs do run better....
Last edited by lars; Aug 19, 2004 at 03:20 PM.
Tech Contributor
Joined: Aug 1999
Posts: 14,380
Likes: 6,390
From: At my Bar drinking and wrenching in Lafayette Colorado
The motor you have is a pretty aggressive build for a street engine. I would highly suggest using a carb that employes 4-corner idle metering screws and the ability to do some tuning. My own personal preference on a carb that meets that requirement is the BG Speed Demon 750 mechanical secondary - no choke. This carb has 4-corner idle screws, but more importantly, the new Speed Demons have an idle air bleed adjustment screw that eliminates the need to do any throttle plate drilling on big-cammed engines. This makes tuning really nice, and will make that engine produce the best idle quality possible. The carbs run about $450 through Summit.
Thread Starter
Pro
Joined: Mar 2003
Posts: 553
Likes: 1
From: Valparaiso IN
Thanks Lars..
The Dude,
send me an email with details, model, pix if possible, srh31@aol.com..
I am interested
The Dude,
send me an email with details, model, pix if possible, srh31@aol.com..
I am interested
Thread Starter
Pro
Joined: Mar 2003
Posts: 553
Likes: 1
From: Valparaiso IN
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