MattW

iTrader: (1)

im thinking about getting one
but i dont know if i will have clearance problems or not

could i just like get a low profile air filter and b ok?
thanks

z28onTweenkies

well, the regular performer manifold wouldnt fit under my stock hood with the stock carb on my 87 z, so i bought an ascd big block hood and that was the end of my problems.

ronterry

I think my Carb(1407) by itself (no air cleaner) set above the hood line.

The RPM is a little taller then the regular performer. You'll need an after market hood for sure.

Ron

mcconahay37

iTrader: (3)

I have an 82 sport coupe. With a Performer RPM and a holley carb, I have no clearance problems. I'm using the air cleaner found on LG4 cars, although it is a little umm.... modified to actually flow air. The carb stud extends about 3/4"-1" above the air cleaner and I have no problems with clearance. I also have new poly motor mounts, so the engine is sitting as high as it's supposed to.

Dragula

Shouldn't as long as you don't get a crazy big air cleaner...mine is topped with a K&N 4 1/2" Cleaner, under a ASCD SS hood, though. But you should still have room!

Sitting Bull

Most people have found, if you do a search of the forums, that the Performer RPM does NOT fit under that stock Camaro hood and the Firebird is even worse.

A regular Performer fits perfectly under both hoods.

To use the RPM they have had to go to a dropped base aircleaner that allows only 1 or 1 1/2 inches of filter above the top of the carb. This has been thought to be detrimental to hp and torque, due to limited air flow to the engine.

However, the latest issue of Car Craft has shown that the size of the air filter is almost meaningless. They dynoed a 520 hp engine with no filter, a teeny-weeny filter, a decent sized filter and a humongous one and found they all made the same power!

So the answer is: Performer RPM with a dropped base aircleaner :sillylol: :hail:

Dragula

Nah.....if you get a regular air cleaner you can justify a new hood :lala:

MattW

iTrader: (1)

what about that edelbrock type air cleaner

mcconahay37

iTrader: (3)

Those tend to disappear into the carb and make bad stuff happen.

ronterry

The one thing the test failed to analyze, was testing each air cleaner after 1000, 3000, 6000, or greater miles.
The bigger one is going to flow more, longer.

A long as the air cleaner can keep up with the CFM requirments of you carb for a period of time between cleaning or replacment of the filter, then your fine.

Ron

Sitting Bull

Well, the average K&N is 12 to 14 inches in diameter and at least a couple inches high. That should be good for two solid years of fun before it needs a bath, don't you think?

Ray87Z

I'm running the Performer RPM with a drop base cleaner with a 3" tall 14" diameter Summit "K&N" copy filter. Ran that for awhile with no problems. (new motor mounts with engine swap BTW). It looked like I wouldn't even be able to shut the hood with just the carb on their as I was installing everything, but it fits fine with the stock Z28 hood.

Then I started to buy into this idea that the drop base is no good. So I tried the above mentioned Edelbrock triangle filter thing, wouldn't quite fit. The studs on the bottom of the Hood that hold the louvers on where hitting it and bending it. Returned it to the parts store...

I finally just ended up adding the K&N XStream airflow lid with the drop base 14x3 filter again. Didn't notice any change with the lid though. And now car crafts article proved it, the drop base filter doesn't affect power one iota, so screw it. Go with the RPM and drop base setup...

riggs86iroc

what do you mean disappear they have a gaurd to keep it up i use it on my iroc with stock manifold and it has a real low profile and freeflowing as a k&n i think!

better to then to fade away

Sitting Bull

People have found that the Edelbrock triangular filter element tends to disintegrate over time and get sucked through the engine

Chuck Everly

This is a loaded question. I think it depends on the car, motor mounts and heads. I put a Performer RPM on the 91 RS with after market heads and new motor mounts. The hood would not fit with out an air cleaner.

On the other hand I know other people that have put Victor Jr. intakes under the hood of an 89 IROC. Go figure.

I would like to also throw in my .02 cents about the foam air cleaners. Do not get one.

bubafett

I does fit. I have done it. Use a Holley and a drop base filter. Dont look for problems, dont use a triangel crap air cleaner. The air cleaner is not the weak link or the flow bottle neck. Do it already.

F-BIRD'88

Depends which air cleaner u use.
the Factory Genuine GM Z28, L-88 drop base air cleaner
is a good 1" lower than most aftermarket ones.
And provides plenty of room.
Check out these pics

F-BIRD'88

this is the Moroso base (typical aftermarket)
Note the base plate clearance at the distributor, in both pics.

F-BIRD'88

The old GM L-88 design fits and works fine
the Moroso and simular designs will be about 1"
higher with the same filter element.

F-BIRD'88

Here's another pic of the GM air cleaner (L-88)
Hope this helps....

Metalifann

Where did you get that GM air cleaner. Do you hae a part #?

F-BIRD'88

I picked up this air cleaner in the '70's.
I've used it on chevelles and my old 454 1970 firebird.
It was used on 1967 to 1971 or so Corvettes
with 427/454 big blocks.
It's refered to as the L-88 air cleaner.
I don't have a part number.
I don't know if the open element air cleaners
sold buy GM performance parts are the same or not.
But the Moroso base ( typical aftermarket) definiatly doesn't sit as low as this one does.
As you can see, it is a much more complex stamping.
Check out the "lawn mower muffler" valve cover breather.

F-BIRD'88

Eckler's Corvette sells the L88 aircleaner base

http://www.ecklers.com/product.asp?d...&pf%5Fid=31632

http://www.noahperformance.com/Restoration.html

JPrevost

My RPM intake with a holley 670cfm TB unit fits under my stock hood. I did have to make some adjustments. First off I ditched the spacer wring but then I had problems with the IAC and some other little stuff. So I took a ball end hammer and made room. I used a dremel to cut a little bit of the air cleaner and sealed it with silicone, it fits great and no problems. I also cut out the underhood bracing in the general area so when the engine moved it didn't lift the hood.
Oh yeah, not to mention I'm running a 1" adaptor/spacer plate so you should definatly be able to get a drop base with a 1" spacer to fit so long as you cut the under bracing. A pair of metal shears worked great and took less than 10 minutes. The ball hammer was only required to cleare my TPS and IAC, the throttle fit with no adjustmints! You should definatly be able to get everything to fit, so long as you're determined to make it work.