new carburator

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Aug 24, 2005 | 09:58 PM

WoomaHodal

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From: Dallas, Texas

new carburator

I have a rebuilt 300, with the original single barral carter carb and original manifolds. I was wondering if i wanted to get a new carburator (or used,but i mean a different one), what should i get? and i suppose i'll also need a new intake manifold also.

Thanks,
Matt

Aug 25, 2005 | 11:28 AM

jgetti

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The edelbrock 1403 500cfm 4bbl with electric choke works well on an offy or clifford intake. Others have used the Holley 390cfm 4bbl with success.

Aug 25, 2005 | 03:41 PM

GHog

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I think the 390 would be a better choice with a stock engine.

Aug 27, 2005 | 12:57 AM

Broke n' Down

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The offy intake and holley 390 make a big difference. You get about 500 more RPMS which equates to more horse power, and also more torque. However, when you really notice the torque is lugging the engine. Mine will go into fourth gear at 15 mph with out complaining with my 4.10 gears.

Aug 27, 2005 | 09:23 PM

WoomaHodal

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From: Dallas, Texas

Where is the best place to get the offy intake and Holley 390?

Aug 28, 2005 | 09:45 AM

Motorhead351

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ebay for used, paw performance for new.

Aug 28, 2005 | 11:40 AM

oldhalftons

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From: Spokane WA

the holley 390 is probably the worst carb for a 300.

If your going to get a 4bbl get an ebelbrock 500 or a Qjet

a motorcraft 2bbl on a Offy C-series intake is the best choice for a stock engine.

Last edited by oldhalftons; Aug 28, 2005 at 11:43 AM.

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Aug 30, 2005 | 12:33 AM

GeneStoner

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From: Great NW

Quote:

Originally Posted by oldhalftons

the holley 390 is probably the worst carb for a 300.

Quantify that statement. Even Offy suggests the 390cfm for use with their manifold on the 300cid...

Aug 30, 2005 | 03:31 PM

#10

Gerry Lutz Jr.

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From: centeral Ohio

if you keep your foot out of it you "should" actually get better milage once it's in tune.

Aug 30, 2005 | 05:40 PM

#11

WoomaHodal

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From: Dallas, Texas

If there's even a chance of improved gas mpg, I may consider a new carb. Does anyone else have any opinions on what carb is best? At this point I'm leaning towards the 390 with the offy intake.

Aug 30, 2005 | 07:21 PM

#12

opus

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From: Montana

Do you think you might get enough gas mileage gains to offset the balance of purchasing this stuff and installing it? That certainly would add up to a bit of gas.

Aug 30, 2005 | 11:14 PM

#13

WoomaHodal

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From: Dallas, Texas

Well with gas prices rising by the minute, it might pay for itself after, say, a year or two. I tend to think about investments on how they will affect the future.

Sep 11, 2005 | 08:01 PM

#14

Broke n' Down

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a 390 cfm with the offy intake improved my gas milage by 1 or two miles per gallon. However, my truck has pretty low gears, 4.10 so if yours are higher (numerically lower) you have a better chance for improved fuel economy.