Carb spacer feedback - Mr Gasket

Hello All:

I need to add some space beneath my Qjet in order for the throttle arm to operate properly. I have Mr. Gasket part number 1932 on hand (see link below).

Is this style OK or should I pick one that looks like the spreadbore design? Summit claims the piece I have will work for a Qjet. (my car is not hi performance)


http://www.summitracing.com/parts/mrg-1932

 

I just went through the same thing earlier this year. I bought a gasket/spacer set from Summit, but I can't seem to find it on their website now. It came with alternating aluminum and fiber gaskets. I think three of each and was 1/2" thick total. I'll look for the package tonight when I get home.

 

engine ? intake ? i'm guessin stock cast spreadbore intake .
and no - that is actually an adapter to mount a holley pattern carb onto a q-jet style intake .
what you want is actually a spread bore design , straight , no taper , 4 hole - NOT open. should not need more than an inch probably . check a mr.gasket #3406 as a reference .
for street use ( dual plane intake ) the adapter pictured or the open ( 1 hole ) spacer will probably decrease flow n performance a little .
and there are some stock cast intake mods you can do that will help also . info on here . check for "doc's dual plane plenum mod's" . that and some basic port matching .

 

This is the one I used:

http://www.summitracing.com/parts/mrg-86b

 

that'll work but more of a heat thing than a space thing i think . two or three metal plates and a bunch of gaskets correct ? use caution when tightening the carb down - more gaskets equal more compression - equals more of a chance to warp/crack your base plate if not tightened evenly . holleys were great for that .
plus for me more gaskets seem to equal more places to leak .
bought a couple of the 1" mr. g's at a swap for like $5.00 each . they're out there .

 

Hmm, I think I know where you could get a deal on one. :Smarty: :laugh:

http://www.v8buick.com/showthread.php?288018

 

I have used that Moroso 64941 phenolic several times for just that TV clearance purpose.

A thick basegasket and that spacer will be enough clearance

Its available on summit too.

 

I generally use doubled 1/4" composite gaskets that I pick up from Cliff Ruggles to use a 4M4 Q-Jet on my nailhead intake, and allow the fast idle cam to clear the bump for the heat passages. I've run it both ways, but these days I leave the 4 holes intact in both gaskets.

 

Are additional top/bottom gaskets required? It doesn't seem to come with any.

 

you will want to use a gasket on either side of the spacer, yes.

 

Stagecoached, if you want mine it's yours for the shipping. I can mail it for something like 5 or 6 bucks.

I'd rather it go on a Buick than anywhere else.

 

Thanks for the offer.

I haven't received my new throttle base plate yet so I don't know how much space I will need yet beneath the throttle arm.

I need to keep hood clearance in mind as well as a hope to still use a factory fuel line.

If I use a 1/2 spacer, can I still manage to use a factory steel fuel line?

 

My factory steel fuel line worked with my 1/2" spacer...

 

I installed the spacer with two fresh gaskets today. I could not get the idle beneath 1600 rpm even after adjusting mixture screws all the way in and backing the idle screw off completely.

Given the slick surface of the spacer, should I have torqued the carb bolts much tighter than normally? I sprayed starter fluid along the base of the carb with engine running and that had no effect. However, I covered the primaries with my hands and it took several seconds for the car to begin to die.

I am convinced I have a vacuum leak because the carb was working fine prior to installing the spacer with gaskets.

I hate to tighten the carb bolts to tight but I have run out of ideas.

Thoughts?

 

I'm confused. Back in post #3 it was pointed out that the item you linked to is not a spacer, but instead an adapter between spread bore (q-jet) flange and square bore (holley) flange. If you're working with a quadrajet on a stock intake manifold, that's not what you should be using for a spacer. The square bore side may not be sealing properly.

I think what you need is a true spacer like one of these:

http://www.summitracing.com/parts/trd-2544
http://www.summitracing.com/parts/mor-65018
http://www.summitracing.com/parts/ctr-85-250

Devon

 

Hi Devon:

I should have clarified I did order/install the Moroso 64941 phenolic piece Ken from Everyday recommended above with a base gasket on each side of the spacer as the Summit Tech recommended. The spacer is very slick on both sides which seemed odd. I wish there were instructions included from Moroso.


http://www.summitracing.com/search?...rder=Ascending&keyword=Moroso 64941 phenolic