switched eddy 750 to holley 750

[donpr]

I switched my eddy 750 to holley 750 and found I'm getting more power and better fuel economy. Still think I need lighter vacuum spring tho. Has anyone else noticed the difference in these carburetors ? The eddy was just to sluggish. Here's what its in

[jayoldschool]

Big block? An Edelbrock 750 is too big for a small block. I run a 1405 600CFM Edelbrock on my my 71 350.

[donpr]

its on a 383 stroker, 86 k20. jasper engines class 2, I dont think its too big ...got lots more power now .

[hugger6933]

the only time I saw a 750 Edelbrock work on a small block was with a underhood blower. Jim

[leddzepp]

Any carb can work fantastic...or any carb can work like crap. Doesn't matter the manufacturer if you don't know how to tune it.

[donpr]

I tried all the different metering rods and different jets in edelbrock 1489 calibration kit with no luck. I finally had enought and put on 3310 yesterday. Im glad I did.

[geezer#99]

Originally Posted by donpr

I tried all the different metering rods and different jets in edelbrock 1489 calibration kit with no luck. I finally had enought and put on 3310 yesterday. Im glad I did.

And it likely wasn't even a carb problem!!
Good move on the holley though.
Now before you start tweaking the holley, optimize your timing first!

[donpr]

It could be timing , it was 16* at idle, but I dont trust my dissy. I bought a complete other one, but ran out of time to install. This carb still pulls harder than eddy did... just my opinion

[geezer#99]

And it'll start better too!
Especially when it gets colder this fall.

You did plug your vac advance off when you checked timing, didn't you?
Have you proved your balancer/timing tab are correct?

[donpr]

yes I plugged vacuum advance and no I didnt prove timing tab. That is a good point. Will check .

[geezer#99]

Info for you.
http://www.crankshaftcoalition.com/w...op_dead_center

[donpr]

very good reading ...will read later..

[donpr]

heres my engine specs http://www.jasperengines.com/pdf/Cla...20Stroker%2009

[Daman]

I swapped everything over to Holley a couple years ago. The reason was how far Holley has come with their products. Power, mileage everything. Back to set it and forget it.

Don't get me wrong I'm a carb guy and have had Edelbrock, Quadrajets, old Holleys and a few oddball ones. These are all on daily driven vehicles and one weekend fun/race vehicle.

[HeavyD]

Using the term set it and forget it and Holley in the same sentence? I guess things have changed.

[EARNHARDT#3]

You haven't lived until you have a 1bbl Rochester B. LOL

[Jonlopes]

Sorry to go off topic but is 750 cfm too big for a stock 396/402?

[elkniks]

Originally Posted by Jonlopes

Sorry to go off topic but is 750 cfm too big for a stock 396/402?

In my experience it depends on how much flow your engine has. I just installed a 770 cfm on a 350 that I am putting larger jets in this weekend because it is running too lean.