carb question

[silversol]

I got my hands on a holley carb #list-4452-1-3411 I know its a factory ford carb it came off a 67 ford with a 390. Its a 600cfm I am wanting to put it on my 67 mustang with a 302. Is this a good carb? it looks better then the edelbrock 1406 I currently have on it. my question is if this is a better carb?

[My427stang]

Ford actually used the 4452-1 as a replacement carb on anything from 302-429 in 1968.

It will work fine, if it doesn't, there is a setup or rebuild problem, it shouldn't need rejetting or any modification, these are pretty easy carbs to bolt on and go

As far as better, it should make a little more power at the peaks, but on a 302 it won't be significant. Edelbrocks are pretty responsive down low, so it really depends on how you drive it and how the Edelbrock is tuned

I doubt the 4452 will have electric choke though, unless it was modified, so if that is a concern, I'd probably leave yours alone if its running good.

The benefit of the 4452 is that it will look more factory stock, and lots of Holley guys out there to help tune, but I wouldn't expect anything drastic.

If you are looking for power, consider a recurve of the distributor if you havent done it. Stock Ford distributors have too slow of an advance and a secondary issue of too much once it comes in. A performance recurve really helps drivability

[silversol]

Thanks for the info. I like the idea of making more power. Im looking more from a drive ability stand point it does have a automatic choke on it. The distributer has been up graded to a msd one.

[My427stang]

Sounds good, those did have an automatic choke, but I was asking if it had electric choke. From the factory it used a hot air tube that took air from the exhaust manifold. If it hasn't been converted to electric choke, you'll need that hot air tube setup, more difficult if you run headers.

I would guess the Edelbrock has a fully electric choke, which is very different

How did you set up the ignition curve on the MSD? They also deliver very slow advance. Having it set at 14 initial, 22 degree bushing to have it all in by 2600 will make it feel like it added a cylinder

[silversol]

Originally Posted by My427stang

Sounds good, those did have an automatic choke, but I was asking if it had electric choke. From the factory it used a hot air tube that took air from the exhaust manifold. If it hasn't been converted to electric choke, you'll need that hot air tube setup, more difficult if you run headers.

I would guess the Edelbrock has a fully electric choke, which is very different

How did you set up the ignition curve on the MSD? They also deliver very slow advance. Having it set at 14 initial, 22 degree bushing to have it all in by 2600 will make it feel like it added a cylinder

Damn you're right about the choke! To be honest i just dropped the distributer in and didnt touch it. Where can i find a 22 degree bushing for it?

[My427stang]

It should have came with a bushing kit. If not, get an advance curve kit for it and set it up for all in by 2600 or so. Depending on your initial, you could run a 20-24 degree bushing out of the kit, and make up the rest with initial timing.