Jayl13

Any one use the Edelbrock marine carbs on their boats?
They offer a great carb for cars and have had nothing but great feedback on their automotive imitation of the carter AFB.

Was wondering if their marine brother is as good on a mercruiser?
Anyone have any experience with these?
Im thinking that it would be a step up from the rochester?

Here is my thoughts and my plan at this time

one of my engines needs some attention (twin 454-330's)
I have to tear the one apart and find out what my banging noise is (under load at 1800+ rpm's)
was thinking of trashing the stocker GM crapola intakes and tossing on new edelbrock preformers on there (jegs 150 bones each) and pop the rochester quadra junk carbs back on
Then i saw the edelbrock 750 cfm marine carbs for 261 each new (not rebuilt) in the jegs catalogue.
I said HUMMMMM that is a great deal price wise but I wonder how they run?
Now the preformer manifold is a spread bore not a square bore and i dont want to play with the adapters ect, for 5 bucks more I can get a square bore manifold or 25 more get the torker manifolds (which I believe comes on the HP500???)
Now my engine only rev's out about 4800-ish range
the torker is from 2500-3000 on up rpm range-ish

The stock rochester is 750 cfm and the Edelbrock is 750 cfm
so fuel efficiency wise I should see basically no gain or loss from any of this (regardless what jegs catalog says)

What do you all think ???
was looking to purchase used marine 750 holleys for around 200 - bucks but have had minimal luck finding marine holleys used to begin with

Do you think this investment is worth it or am I just more or less wasting time, money and energy?

Should I just opt for the spread bore performer and leave the rochesters?

Note -- the rochesters work well, no problems with them what so ever

Thanks guys
just need a little boost in a direction
thanks
Jason

Jayl13

TTT
no one has ANY input on this?
Come on now guys
Thanks
Jason

ROLNTHUNDER

Jay i used them and the only good thing is they are easy to make changes to,other than that they are like a qjet in proformance

Brad Perry

I used a 750 Edelbrock like you are suggesting on a mild 454. It ran great, but ALWAYS stumbled off idle. In the cool dense air, it wood even pop through the carb when accelerating. I bought the tuning kit and worked and worked to no avail. Then all my buddies chimed in and said I needed a Holley because the pump shot could be increased to much more than the Edel. I guess it has to do with a much higher load off idle than in a car.

There you go.

panteraman28

Dont waste your money, get holley 800s or demons, you will be happier

Jayl13

What is the difference between the car carbs and marine carbs?
I noticed the J tube instead of the straight up vent tube
but what else?
Can these parts be purchased cheaply and just take a holley and redo it?
Jegs has the zinc plated holleys for 239 $$
750 Vac secondaries double pumper
Should I be looking for mechanical secondaries?
talk to me people
Thanks much
Jason

NW_Jim

Besides the J-tubes, they have sealed throttle shafts.