Carb choice for CI head

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Fatboy
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Carb choice for CI head

Post #1 by Fatboy » Thu Sep 29, 2016 7:41 pm

Hey guys I'm trying to get some opinions on what carb to use, my current set up is a 200, clay smith 264 110 cam, dui, headers , 355 rear, c4 trans, CI aluminum head ported, bottom end rebuilt and an edelbrock 500. The car runs pretty good but idles a little rough till it warms up my mechanic feels it's over carbed, I am thinking of putting a Holley 390 on but would like some input, any advice?

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65-coupe
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Re: Carb choice for CI head

Post #2 by 65-coupe » Thu Sep 29, 2016 8:32 pm

I have a 390 on mine and it runs great.
1965 Mustang coupe, Poppy red with black interior, I6, DUI, CI alum head ported, 264/264 110 Clay Smith cam, 1.65 roller rockers, Autolite 2100 300CFM, Lokar pedals and throttle calbe, Spectre air intake. Shelby mod to front suspension, CI headers stainless with Jet-Hot ceramic coating, CI Stainless 2" impostor dual exhaust, 17x8 Coys C-67 wheels,

Fatboy
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Re: Carb choice for CI head

Post #3 by Fatboy » Fri Sep 30, 2016 7:46 am

65 Coupe did you have a problem clearing shock tower?

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65-coupe
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Re: Carb choice for CI head

Post #4 by 65-coupe » Fri Sep 30, 2016 9:57 am

No it was close but cleared.
1965 Mustang coupe, Poppy red with black interior, I6, DUI, CI alum head ported, 264/264 110 Clay Smith cam, 1.65 roller rockers, Autolite 2100 300CFM, Lokar pedals and throttle calbe, Spectre air intake. Shelby mod to front suspension, CI headers stainless with Jet-Hot ceramic coating, CI Stainless 2" impostor dual exhaust, 17x8 Coys C-67 wheels,

gus91326
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Re: Carb choice for CI head

Post #5 by gus91326 » Fri Sep 30, 2016 11:07 am

I decked the block on mine and went with the HSC pistons and am a hair over 10:1. I run a 600 holley that I jetted down from 65 to 61 jets. It's close. Idles at about 900 rpm and I have an a/f of 13.5-14.0 at idle and is about 11.8 at WOT.

I think the idle issues are because even while the CI intake is better than the log, I am still not convinced that all the cylinders are getting the same amount of fuel. I'm contemplating adding port injection using the bungs on the intake.

I oriented my carb east/west to clear the linkage. While I did not issues with the intake hitting the shocktower I did have to trim my export brace. I recently used CoupeBoy's adjustable motor mounts and was able to move the motor about 1/4" over and have had no intereference problems since.

Fatboy
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Re: Carb choice for CI head

Post #6 by Fatboy » Sun Oct 02, 2016 12:46 pm

Gus thanks for the info sounds like a nice set up you have

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Re: Carb choice for CI head

Post #7 by Fatboy » Fri Oct 14, 2016 6:17 pm

Well I put the Holley 390 on and it runs pretty good I think it just needs a little more tuning, only issue I am having is clearing the hood with the air cleaner, 65 Coupe could you post some photos of your set up?

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65-coupe
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Re: Carb choice for CI head

Post #8 by 65-coupe » Fri Oct 14, 2016 8:39 pm

Image


Low profile carb hat. I also have a 10inch round filter with a 1 3/4 air filter. I do not have a pic of it.
1965 Mustang coupe, Poppy red with black interior, I6, DUI, CI alum head ported, 264/264 110 Clay Smith cam, 1.65 roller rockers, Autolite 2100 300CFM, Lokar pedals and throttle calbe, Spectre air intake. Shelby mod to front suspension, CI headers stainless with Jet-Hot ceramic coating, CI Stainless 2" impostor dual exhaust, 17x8 Coys C-67 wheels,

Fatboy
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Re: Carb choice for CI head

Post #9 by Fatboy » Fri Oct 14, 2016 9:39 pm

Did you use any spacers for your carb to clear the linkage?

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65-coupe
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Re: Carb choice for CI head

Post #10 by 65-coupe » Fri Oct 14, 2016 9:45 pm

Fatboy wrote:Did you use any spacers for your carb to clear the linkage?

Yes I have a 1/2 spacer and also had to notch the hood bracing for clearance.
1965 Mustang coupe, Poppy red with black interior, I6, DUI, CI alum head ported, 264/264 110 Clay Smith cam, 1.65 roller rockers, Autolite 2100 300CFM, Lokar pedals and throttle calbe, Spectre air intake. Shelby mod to front suspension, CI headers stainless with Jet-Hot ceramic coating, CI Stainless 2" impostor dual exhaust, 17x8 Coys C-67 wheels,

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