Technical edelbrock carb spacer help needed

i have a edelbrock performance intake im putting a edelbrock 750cfm carb on it and im taking off the square open spacer and putting a square bore to quad jet spacer.. i bought this one but the outter threaded pegs are bigger than the spacers ones and vice versa the inner hole on the spacer are bigger than the manifolds one... did i get the wrong spacer? if so what do i need...if not how do i go to modify this one? thanks

 

little hard to understand exactly what you are saying. I think you need to drill out the stud holes in your spacer to fit the studs in your manifold? If so, whats the problem? Drill the to fit.

 

You have to move the studs to the inner holes on the manifold.
Things should line up then.
KK

 

Just wondering, why are you using that spacer? It looks like it will restrict the secondaries, if that is an issue for you. I have a 5/8 thick plastic spacer w/ the correct holes you can have for the cost of the postage. Got it w/ another spacer, doubt I'll ever use it. K6

 

read the instructions , you pull the studs out of the manifold then use the supplied large head flat blade screws ( filster bolts ) to attach the adaptor and gasket to the manifold ( they go in the inner holes ) , leave them loose at first then line the gasket and everything up then tighten them down , then put the new studs in the adaptor to mount the carb ( double nut them down and use a drop of blue locktite on the adaptor threads do not do apecrap tightening as it will strip out easily ) . install the carb and gasket then finger tighten the nuts then open all 4 barrels up to make sure they do not get hung up on the adaptor then tighten down and check the throttle blade action again (no need for lock tite on carb side threads )

 

do what stimpy says...

 

UPDATED INFO: you have the wrong spacer - you have a spread bore manifold - ** Take a look at Edelbrock 2732 Adapter Plate for mounting Edelbrock square bore carb to a Edelbrock spread bore intake manifold - needed to close up gap difference between square & spread bore - then you should be able to use the Trans-Dapt square bore 1" swirl spacer that will improve bottom end performance.

 

thanks for the info...i was told i needed that spacer but alot of people are saying dont use it so when i get my carb here i will pull the studs that are there on the outter holes and use only the inner ones and bolt in down there just the carb right against the manifold no spacer... what do you think was the reason why i was told to get that spacer when the edelbrock 750cfm carb should just directly bolt up?

 

Edelbrock actually has a special plate to seal the carb to the manifold without using an adapter

 

you do need an adaptor. The intake is a spread bore and the Edelbrock is a square bore.

 

so what adapter do i need? i thought i bought the right one

 

Save your self a lot of headaches and find a square bore intake and change out the Intake you have now. The big problem with the adaptor is that the area on the edge of the spread bore intake can be a place for the carb to intake to leak vacuum. Why would you even put a square bore carb on a spread bore intake. Spread bore intake are for replacement of the cast iron intake and then you can use the spread bore carb. If it were me I would put one of the thick spread bore gaskets between the manifold and spacer, that thicker gasket will seal better then a thin one. Just my 2 cents worth.

 

Go back and read what Stimpy wrote. Two or three times. Your adapter should get the carb on the manifold. It did come with some screws, right?

 

I would be putting a Q jet on there it would be a much better carb.

 

ebay.com/itm/361356442769?_trksid=p2057872.m2749.l2649&ssPageName=STRK%3AMEBIDX%3AIT this is all i got when i bought one off ebay rich fox....

 

no instructions no bolts...but if it will work with the adapter i got i will have to hunt down the proper bolts and i will use this adapter spacer...

 

http://www.edelbrock.com/automotive/mc/install-items/

#2696 is for use on OEM spread bore manifolds.
#2732 is for use on Edelbrock spread bore manifolds
You don't need an adapter at all. The #2732 is a .100 thick plate for reinforcement and for proper gasket sealing. You will need standard length carb studs which any auto parts store will have.

 

It looks like your intake was made for the AVS or Thunder series or Performer Edelbrock carbs:

http://www.edelbrock.com/automotive/mc/manifolds/oldsmobile/performer-bb.shtml

I would call their tech line tomorrow and tell them you are not using that carb, and what adapter do you need . Why keep spinning your wheels when help is a phone call away ?

Don

 

xracer....so i dont need a spacer? i know my carb will bolt to the manifold but isnt the reason for the spacer to stop heat transfer? and dons hot rods i called them today and they said use spacer #2732 so i wrote it down..then after i looked it up...its a open square....people on the internet told me by using that i lose the dividing of the two sides of the manifold and that would be bad..

 

that's used to seal the carb to the manifold, not really as a spacer.

If you want to slow down heat transfer, you need a non-metallic spacer.

 

quick question what is the difference and effects given by the one spacer thats beveled vs one that has straight holes?

 

people on the internet told me by using that i lose the dividing of the two sides of the manifold and that would be bad..

That's a whole different can of worms and it's hard to state anything for sure without dyno testing,but your in luck Edelbrock has already done that for you. You are using their intake and their carb and they recommend #2732 spacer. It's hard to out think those guys they have the engineers,equipment and experience.

 

yep threw me for a loop when he said use the one i have being all these people were saying by using it it wouldnt allow each manifold side to be isolated would cause all kinds of problems...

 

opps it was this one they said....

 

How big is your engine, 750 cfm is a lot for a small block ......................

 

I am a little confused you don't need an adapter with that intake to run a spread bore carb the manifold is made to take one. Just get a standard spread bore spacer and be done with it.

 

The instructionss are on the heel !!!

 

Or the Holley equivalent. I never liked those Edelbrock AFB knockoffs anyway and adapting it to the spreadbore manifold, is too much like work.

 

I wouldn't have washers and nuts laying loose on top of the manifold with out the intake opening being taped off, just my thoughts.