HELP identifying Holley Carb
 

Any one know what type of holley carb this is ON THE AIR HORN IT SAYS
(LIST-4118
1994
:confused:
I NOW ITS A DOUBLE PUMPER

Not to burst your bubble ... but are you SURE it's a double-pumper?
If I'm reading the Numerical Listing correctly, it says it's a 725 CFM 4150 series with a yellow spring in the vacuum secondaries.
http://www.holley.com/data/types/pic...rb%20intro.jpg

IMO, a VS carb is better for MOST street-driven vehicles (especially with an automatic trans) anyways.:thumbup:

I seem to remember it being an older model from the late 60s or early 70s,maybe check oem?

yea is a double pumper

so will i be better off keeping my 600 edelbrock carb??

I just took another look.

Primary fuel bowl #134-103
Secondary bowl #134-102
Which are center-hung fuel bowls. (That's a GOOD thing.)

The primary bowl is listed as possibly being on a MARINE carb?

http://www.holley.com/data/products/...ium134-102.jpg
In any case ... both bowls will have accelerator pumps attached to the bottom of BOTH bowls if it's actually a "double-pumper"

Edit: Sorry, I was typing this while you posted a response to my last one.
My aplogies ... not trying to be argumentative. :D

You'll get a varied response to this question.

I like Holleys because I find them pretty simple to work on.
Your Holley 4418 is supposed to be 735 CFM, which may or may not be a good thing, depending on engine displacement, RPM range, and intended use.

i was going to put it on a mild built sbc 350 bore 40 over

Holley's Interactive Carb Selector recommends a 600 to 650 CFM w/ vac secondaries for a "mildly modified" 350 with a max RPM of 6,000 in a vehicle weighing more than 3100 lbs ... etc.

Here' an actual CFM calculator which accepts some variables (like Volumetric Efficiency).

depends what you call mild? A 650 X is a great little carb.also depends on what intake you are using.

Edelbrock performer RPM INTAKE

650 would work very well on a performer and mild 350 with headers.

A Holley 4118's not a double pumper- it IS a dual feed, however- a lot of guys get this mixed up sometimes. Has vcuum secondaries, was originally a performance aftermarket carb for the 289/302 sized Ford. As long as the linkage can be worked out for the engine you want to use it on, it'll work fine being as how it's a vacuum 2'ndary carb. Might take some tuning, just like any carb.

From http://mustangtek.com/4150/4118.html:
http://mustangtek.com/4150/images/4118002.jpg