4500 vs 4150

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4500 vs 4150

Post  Mike R on January 11th 2013, 11:29 pm

I'm wondering about the streetability of a 4500 vs a 4150 carburetor. The motor is a 528, 13.3 compresssion, Blue Thunder heads, XR-292 roller and will be running E-85 for fuel. If I opt for a Dominator do I want a 2 or 3 circuit carb. Since the car will see more street time than strip I'm more interested in driveablity than maximum HP.

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Re: 4500 vs 4150

Post  Gregaust on January 12th 2013, 5:04 am

Like my 2 circuit 1050 Dom. all street runs real nice . 521 SCJ , XR 292R etc . Was built by these guys http://www.performancecarb.com/

They got me sorted after lots issues with a 3 circuit Demon

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Re: 4500 vs 4150

Post  dfree383 on January 12th 2013, 8:28 am

The dominator will be worth a lot of power for your application on e85 IMO.

The 2 circuits ones are more street tune friendly.

With your compression and cam your leaning more towards a race engine than a street cruiser.
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Re: 4500 vs 4150

Post  Dave De on January 12th 2013, 11:20 am

Dominators have the ability to adjust the progressive ratio where you can make them come in late for the street or early for the track. The HP series Holleys have a fraction of that feature. Streetability is more about power and weight for a car that gets mostly track use and a little grocery getter life.
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Re: 4500 vs 4150

Post  rmcomprandy on January 12th 2013, 1:02 pm

A Dominator, (even a 3 circuit, though more dificult), can be made to run fine of the street with an everyday type vehicle, too ... if you don't need a choke.

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Re: 4500 vs 4150

Post  BigBlockRanger on January 14th 2013, 10:22 am

FYI the linkage names are a little funny.

Soft progressive linkage opens secondaries early and slowly

Progressive linkage is more like a regular 4150. Secondaries open later and quicker.

I just switched from a 950 to a 2 circuit 4500 1050. I have not driven it, (been too cold) but have run it in the driveway. Idles clean and throttle response is NOW. Can't wait to make a pass with it.

Here's a link to my carb build:

http://motorsportsvillage.com/forum/viewtopic.php?f=6&t=9704&sid=a422988d8d45fe838ff5b71d020162e1
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Re: 4500 vs 4150

Post  Mike R on January 15th 2013, 8:10 pm

Okay, Dominator it is. Is there a specific model number carb I should be looking for? I'm not a carburetor guy and will be having it converted to E-85 so I'd like to get the right carb, not just any old Dominator.

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quick fuel

Post  1963hotrod on January 18th 2013, 5:00 pm

Quick fuel makes an e85 4500. I have had very good luck with both the 4150 & 4500.

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Re: 4500 vs 4150

Post  Rich Osmond on March 13th 2013, 4:26 pm

I have yet to put a 4500 carb on a decent engine over 450 ci and not see a performance improvement. As mentioned the 2 circuit carbs seem to work better on the street.

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Re: 4500 vs 4150

Post  Lem Evans on March 13th 2013, 6:57 pm

A 2 circuit 1050 with P.V. in the primary side works good . I've used the FX-4700 several times with good results....pump gas application.

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Re: 4500 vs 4150

Post  John Myrick on March 13th 2013, 7:44 pm

Lem spec'd a 4700FX for my 557 pump gas engine and it ran like a banshee. Very good street ability .

It's for sale too ( shameless plug )
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Re: 4500 vs 4150

Post  Lem Evans on March 13th 2013, 7:49 pm

John Myrick wrote:Lem spec'd a 4700FX for my 557 pump gas engine and it ran like a banshee. Very good street ability .

It's for sale too ( shameless plug )

Sounds like a perfect storm Very Happy

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