The carb is a edelbrock 500cfm. Still getting use too this carburetor I was too use to my holley 600. The startup on this eddy took me by surprise when the idle shot up to 1000 rpm until the choke opened up. But other then that performance is there and plenty of get up and go

 

Sweet! I like it--the look of the entire engine with the black and the blue dui. It all adds up to look sharp. Nice job.

 

Agreed. A very sharp looking setup. I like it!
What size edelbrock?

How's the performance difference between the two?

 

Most excellent!

 

Thanks guys! Appreciate the comments!!!

 

Well I didn't get to drive the truck with the holley when the dui was in but eventually I will! But for now I like it !

 

Hi guys so I seem to have a problem or not? I've never ran a edelbrock before so I'm not sure if it is normal but when I first start up this thing is screaming at like 2k and then I hit the gas and it drops to 1800. Is there any way I could lower the cold start idle?

Also how are the Autolite 4100 carbs on our engines??

 

The Autolite 4100's work quite well.

 

https://www.google.com/search?q=Fast...utf-8&oe=utf-8

 

The Autolite 4100's: I find them usually over priced, due to the collectors of 'stangs running the price up for oem stuff. Besides that you're playing with a nearly 50 year-old carb that has been rebuilt untold times, had parts swapped, and shafts worn so they suck like a ... vacuum cleaner. But other than that, sigh, they're nice carbs.

There are four types. 'Yes, four.' The 1.08 venturi, which is a 480 cfm 4v, the 1.12 venturi, a 600 cfm 4v, and a 1.19 venturi, a ...iirc a 750 cfm. That's correct, that's only three, because I differentiate between two types of the 1.08. Ford made the 480 cfm in two configurations, for a sb and a bb engine. The latter was made and put big blocks for emissions. There is a site that lists the serial #s so you can look them up. The limitation of looking them up is that the highly regarded annular fuel discharge heads came in clusters with the air bleeds and fuel feed passages all as one. Although they are labeled with a serial number no one knows what they numbers mean, and therefore can't tell if the 480 cfm carb you have, that the numbers stamped on the carb mounting toe say if for a 289, has the discharge cluster for a 427. And After nearly fifty years of making the rounds, many of the 4100's have been altered, making for an interesting afternoon of cursing in several languages as you try to tune a ... Frankenstein carb.

It's a real shame that Jon of Pony Carbs did not put pen to paper before he died and record his vast knowledge about the 4100.

 

If you push the throttle back all the way you will see the fast idle adjusting screw on the throttle arm below the curb idle screw.