Well, I ordered an edelbrock power package from jegs with a cam and lifters, manifold and carb along with headers. Much to my surprise, I opened the box and it was a 750 cfm carb. I was expecting a 600 or something smaller. Is the 750 too big? My engine is a completely stock 1975 360 . Should I trade in for a 600 or 650, or mess with this HUGE carb?

 

make sure your jetting AKA fuel metering rods are correct . eidl. has a neat web site and a real good tech line for assistance ,as you can tell , i really like eidlebrock,bob

 

with my experience a 750 on a 360 with stock heads is to big, maybe it will work for you maybe it wont.

 

did you get the RPM power package? That comes with RPM intake and the RPM cam..it's a pretty big cam for a 360 with stock heads (non ported). I can see them shippping that carb with the RPM package.

that carb is overkill for the performer package, in my opinion. Especially with a 360.

 

The manifold and cam are performer, not performer rpm. My buddy has a holley 650 he could hook me up with. Would it be alot better?

 

If the Holley is in good shape, and you can get your money back on the Edel....I'd try the Holley first. It shoudl be more than enough, unless you plan on going with high flow heads and a pretty big cam later.

 

I will be the dissenting vote. I don't think there is anything wrong with a 750cfm carb on any engine over 350ci as long as you are not at a high altitude location. A properly tuned 750 will meter the same amount of fuel to the engine that a 600 would at any given RPM, but not be as likely to run out of carb under full throttle conditions. I am not saying that a 600 wont feed a 360 adequately, just that I don't see the advantage of switching to a smaller carb when he already has the 750 in his hands.

-Scouder

 

I think i'll give the edelbrock a try. the holley has been collecting dust for about 10 years and its ugly. If its really bad, I'll go clean up the holley. Or I could use this as an excuse to port my heads.....

 

I got a bud with a 72 ford with a 390 and a 750 is running way to rich for him. I think if he would ownsize to a 600 he would get better than 9 MPG.

 

The carburetor airflow ie 600,650,750, etc. has NOTHING to do with whether the carb is running rich!! The jets and metering rods affect the fuel mixture no matter what size the carb is. The cfm rating is the maximum airflow capability of the carb.

 

Thank you. You saved me having to type the exact same thing.

-Scouder

 

My brother ran a 750 holley on his stock 390, had dual exhaust only and it ran great, and while rebuilding the 750 we ran a 600 on it and it had more snap with the 750.

 

I run a Holley 670 on my 390 and love it. Plenty of carb for my motor.

 

amen,bob

 

For a stock 360. The Barry Grant site reccomends a 525cfm Road Demon (I assumed the cam duration to be less than 210 degress).

Even if you step up to a 210-220 degree cam and 460 Cubic inches, they still reccomend a 625cfm Road Demon.

There must be some price to pay for having too much carb. I'm thinking you lose some bottom end grunt. How much, I don't know.

this, just for the sake of discussion. There is no doubt you can make it run with a 750.