ok i want to put an eldabrock performer air gap intake on my motor,does anyone know if i do this will my duel snorkel breather system clear under the hood?i have a 1'' spacer on my stock intake now to run my holly carb and the breather just nicks the hood.any reply is better than none.

 

I'm not 100% sure, but the stock air cleaner housing may not fit. I have a performer RPM (same height), but I have a drop-base open element housing which drops more than the stock housing does, and I had to use a banjo fuel fitting to get it in. One way to find out - do it! If it doesn't fit, go open element.

 

If you are talking about the "performer air-gap" and not the "performer RPM air-gap" it will fit if you lose the 1" spacer. You atleast have a Camaro and not a 'bird. The bird hood is even lower. Oddly enough, it has a lot to do with the motor mounts. 20 year old original motor mounts are a big help with this.
(engine sits lower) If you can run a 1" spacer on the stock manifold I'd bet you still have the stock mounts. The one thing you can't get is the A&B measurements for the stock manifold.
And now for the obvious question:
Will the "performer RPM air gap" fit? It should be .2" too tall in the front with new mounts. Now you see why the mounts are important. The downside with the old mounts is that the motor will move more when the torque of take-off hits.

 

so what youare saying is,the air gap performer RPM intake WILL fit with my same mounts?and if i put new mounts in it wot clear.

 

It will "maybe" fit. Depends on how worn the old mounts are. If you have new mounts it will be approximately .2" too tall.

 

well i'll check it out but if i think its not gonna fit i'll just go with a regular one.Supervisor42 are you familiar with Edalbrock's steet master intake,i can get one 4 a good deal wondering if its any good?

 

Edelbrock doesn't make the "streetmaster" anymore. They made it from '74 to mid 80's. I don't have any info on it other than it's a low rpm towing & economy.
What's wrong with using the performer (non-rpm) (non air-gap) manifold?
It will fit just fine and will give a near stock 305 all it wants. It also has provisions for an EGR valve and exhaust crossover to help on cold days.
It's ideal to beef up a stock engine that is a daily driver.
Unless you have done headwork, valve spring & cam changes you don't need the "RPM" manifold anyway. It'll just cost you low rpm torque.

 

ya,i'm gonna go with the air gap one,its the same height as the normal performer one so might as well.thanx 4 the input guys

 

Be sure and come back and let us know how it works out for you.

 

Edelbrocks EPS is also good, I think that's what they're calling the performer nowadays.

 

EPS is basically the same as a Performer, but has a sqaurebore flange. The Performer uses a Qjet flange.

 

well then,i'm useing a 670 holly carb,it should bolt up to the Edelbrock intake right?i'm painting the engine bay this weekend so i should have some pic's of that by monday or tuesday

 

really? I didn't know that, I thought EPS was a new thing, and was kinda between performer and performer RPM... huh, learn something new everyday.

 

Its just a very slightly tweaked 'Performer' that has a Holley flange instead of a Qjet flange. I had one for awhile, although I didn't use it, before I got my RPM Air Gap. It was noticeably shorter than the Air Gap RPM is for sure.

The only problem arises when you use a double pumper carb. Because of the location of the fitting hole for the brake vacuum port, you can't have a 90* fitting there and use a double pumper at the same time unless you get a carb spacer.

Edelbrock sells a low profile 90* fitting that will work with a Holley that doesn't have a secondary accelerator pump, like a vacuum secondary carb, but it is still too tall to clear the double pumper. Heres a pic of the problem someone posted before.

It works just fine with a vacuum secondary carb, like your 670, but not with a double pumper. The only way to make it work with a double pumper is to either use a carb spacer, or plug that hole and drill and tap a new one somewhere else.

 

thanx 4 that info too

 

Hey air adam. I have all my parts lined up, installation later this week. Just want to get my research done.

I have a holey 4150 series (4779 model) carb. Its a double pumper mech secondaries. And an RPM Air Gap manifold.

Its going on a 1987 firebird with a trans am, nostril style hood.

Will it fit? UP till now, i had thought it would, but i didnt know it would matter if its mech. or vac. secondaries.

Worst case scenario, if it doesnt work, im gonna see if my body guy can "fabricate" me a 2" cowl out of the hood, or a cheaper version would be to purchase the $80 motor mounts from UMI performance. Do you think UMI's solid mounts would do the trick? They are a stock replacementa nd look like they sit quite a bit lower.

Forgot to mention:
My carb still has the choke horn on it, i dont plan to get rid of it, because those two horn things in front and behind are just as tall. I have a drop base air cleaner that i got for $5 at a swap meet. Its somewhere between a 1.5 and 2" drop. Hard to measure since its at an angle, but its definately more than 1.5". I beleive also, i will need a minimum of a 3" air cleaner, when you take into account the drop, and the height of the choke horn. This will be topped off with one of summit's open element air cleaner lids.

 

What I did, and a friend of mine with a Demon DP on the same RPM air gap intake, is just use a plug in the hole behind the carb base. I drilled and tapped one of the intake port injector bosses (lots of metal for that there) to put in a fitting for the power brakes. I used a 1/8" pipe thread tap, and a 1/8-3/8 adapter, so it would thread into the small hole and have a 3/8 hose barb on the other end. Worked nice! Use the port on the back of the carb for PCV.

With my buddy's 406ci, he didn't use PCV, so just plugged the hole and hooked the brakes to the carb.