Ok, my Holley is now installed, and i had to use a parts store Adaptor item. My squarebore Holley mounts to this which is mounted to the spreabore intake manifold. Since this is the OE intake manifold with the 2 big holes in back, and 2 small holes in front. Question is: Will fuel from the carb go from each single port on the manifold from the carb? the holes on the carb are smaller than the 2 big holes in back.

Just want to know if something weird will happen before i fire it up. Thanks.

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--Steve S--
1984 Trans Am 305 LG4, 5 speed
Daily Driver, Flowmaster 80 Series
NOW FEATURING: Holley 600 cfm & vacuum advance

 

It's not an ideal situation, that manifold will cost you some power. THen again, it would no matter what

But nothing BAD will happen.

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"American made baby. 100% American iron. The muscle among the masses. My hero. Yep, you can take your ergonomically designed, space age, computer controlled, 4 door, cup holding map lighted split double wishbone split fold down retractable cargo covered moon roof piece of transportation and keep it. For I have felt the thunder. And I know the difference!"
JSP Motorsports
ICON Motorsports

 

ok, so i guess that manifold vacuum won't be short on demand here. Also, fuel won't splash onto the metallic circle dividers, and go directly into the manifold?

 

The idea of an engine is supposed to be that it will suck in the fuel and the fuel won't be shoved/sprayed in. It may be a problem, If I could do it again I'd dremel out the center the extra metal in the enterance for the primaries. I used to find gas on my air cleaner lid constantly, no such happenings since with same set-up but performer intake manifold. You basically have to remove the intake to dremel it otherwise you risk getting metal shavings into the engine which would be far worse then the occasional spray of gas on the aircleaner lid. It's not a performance piece for sure. You may have luck getting a cheap intake manifold from a junkyard that is squarebore and not spreadbore.

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1984 WS6 Trans Am Hartop
Former L69 Car under restoration
1984 Trans Am T-tops
4-bolt main 350, performer intake, headers, Holley 650, T-5, hayes clutch, dual elec. fans and 3.23's.
Daily driver and restoration
13.98 @ 101

 

I think my point was misunderstood. Will having an open SPACER affect the fuel delivery to the 4 hole intake manifold. I don't want the fuel to hit the metal, and was wondering if a 4 hole spacer was mandatory.

 

this isn't an answer to your question but i want to tell you i used one of those afew years back and i constantly fought vacuum leaks. the bolts that hold it to the manifold would loosen up over time. just so ya know

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86 camaro 405 sm. blk. th 350 tranny 3.42 gears

 

Your question is not misunderstood. Here is the idea, take in a depth breath. Your lunges are creating a vaccum, much like a piston moving down in the bore does. Does any of that wind hit your face? Nope. The pressure difference isn't there. Just like the engine, the air is being sucked into the "holes" and not being shot down at the manfiold (in theory!). The problem with the theory is that an engine isn't a turbine, it's a piston pump so one pump creates a nice velocity of fuel which then is all the sudden no longer being pulled that way, but now in a different direction and it will hit other objects in the process. Fuel pressure also plays a little into this also.

Short answer: No, it's not manditory. I don't think they sell ones with 4 holes for an adapater because the taper for the primaries would inhibit the throttle blades. Plus the division of vaccum would really mess up the operation of the carb because most of the airflow would have to try to be drawn through the secondaries. Like I've mentioned before, not a performance piece, barely a daily driver piece, if I were you I'd go try to pick up a cheap aftermarket manifold used or find a stock squarebore one or even buy a used spreadbore and grind it yourself. Heck, I'd cut and sell you my Q-jet piece of Iron for $20 just need to be swapped.

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1984 WS6 Trans Am Hartop
Former L69 Car under restoration
1984 Trans Am T-tops
4-bolt main 350, performer intake, headers, Holley 650, T-5, hayes clutch, dual elec. fans and 3.23's.
Daily driver and restoration
13.98 @ 101

 

Jesus, you follow my posts like i'm the man himself.

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--Steve S--
1984 Trans Am 305 LG4, 5 speed
Daily Driver, Flowmaster 80 Series
NOW FEATURING: Holley 600 cfm & vacuum advance