FI racing air cleaner

[Jerry G.]

I would like to built or adapt an air cleaner air box for my road race FI 64 car. I'm thinking i could use one of those air boxes that are rectangular and have a flat paper air filter in them. i'd like the inlet and outlet to be 90 degress apart but on the same plane. As always with race cars bigger is better. Any ieas about an OEM filter box i could adapt to my needs ? Jerry

[Steven B.]

Re: FI racing air cleaner

Jerry, IIRC the Suburban circa 1999 has a large box with the 90 degree separation you need. in and out of the box is is fed by hose.

Steve

[James B.]

Re: FI racing air cleaner

Jerry, just out of curiosity, with a change like that how do you measure your air/fuel ratio to adapt to changed restriction?

[Jerry G.]

Re: FI racing air cleaner

either on a chassis dyno or using an air fuel braod spectrum measuring device mounted in the car. i've done both.

[Clem Z.]

Re: FI racing air cleaner

did you race the car yet with the FI ??

[Clem Z.]

Re: FI racing air cleaner

I would like to built or adapt an air cleaner air box for my road race FI 64 car. I'm thinking i could use one of those air boxes that are rectangular and have a flat paper air filter in them. i'd like the inlet and outlet to be 90 degress apart but on the same plane. As always with race cars bigger is better. Any ieas about an OEM filter box i could adapt to my needs ? Jerry

i would guess the stock GM FI cold air air cleaner system should be well engineered and there are paper filters to fit it as posted on this website.

[Jerry G.]

Re: FI racing air cleaner

I did race it it Portland last week. it was disapointingly low on power. Not nearly what the dual plane produced. i've got a problem with air inlet restriction in the air cleaner I used. i may also have a problem with nozzel orifices being too small. I'd like to use the stock system but it's hard to find and god awaful expensive. A rectangular box with a flat filter will work if i can find one thats about 12 inches long and 10 inches wide by 6 inches deep.

[Clem Z.]

Re: FI racing air cleaner

I did race it it Portland last week. it was disapointingly low on power. Not nearly what the dual plane produced. i've got a problem with air inlet restriction in the air cleaner I used. i may also have a problem with nozzel orifices being too small. I'd like to use the stock system but it's hard to find and god awaful expensive. A rectangular box with a flat filter will work if i can find one thats about 12 inches long and 10 inches wide by 6 inches deep.

paper air filters are restrictive and a 14" diameter type like used on GM hi perf engines pass about 675 CFM. this info is from holley

[Clem Z.]

Re: FI racing air cleaner

paper air filters are restrictive and a 14" diameter type like used on GM hi perf engines pass about 675 CFM. this info is from holley

i would put the duct work thru the fire wall and put a large air filter inside the cabin. this is the way we did our dirt racecar to keep the filters clean. since your corvette is a open cockpit the inlet air should be close to ambient

[Clem Z.]

Re: FI racing air cleaner

i would put the duct work thru the fire wall and put a large air filter inside the cabin. this is the way we did our dirt racecar to keep the filters clean. since your corvette is a open cockpit the inlet air should be close to ambient

OOPS just remembered that the air intake is on the drivers side so this will not work.

[Duke W.]

Re: FI racing air cleaner

paper air filters are restrictive and a 14" diameter type like used on GM hi perf engines pass about 675 CFM. this info is from holley

At what depression??? Air flow ratings without the test depression don't mean jack sh....

You'll see a dyno test in the next issue of The Corvette Restorer where a '67 327 lost power without the air cleaner relative to the OE air cleaner and a cellulose element.

Duke

[Clem Z.]

Re: FI racing air cleaner

At what depression??? Air flow ratings without the test depression don't mean jack sh....

You'll see a dyno test in the next issue of The Corvette Restorer where a '67 327 lost power without the air cleaner relative to the OE air cleaner and a cellulose element.

Duke

that can be caused by turbulence around the air bleeds of the carb. you need something to straighten out the air flow. that is what that little screen did on top of the carb on the L-88 because most were raced without a air filter because of the restriction. the shape of the air ceaner base also helped with the air flow. a standard trick in NASCAR was to cut slits in the paper filter for quailifing to get more air flow and that is why NASCAR checks the filter before you go out.

[Jerry G.]

Re: FI racing air cleaner

If I can find an air box with a rectangular filter that will fit under my hood do you have any idea what area of filtration will move 700CFM. ie is it a 120 square inches or 150 or??
It really chaps me to think about spending nearly $3000 for a Podel repop.

[Jerry G.]

Re: FI racing air cleaner

At what depression??? Air flow ratings without the test depression don't mean jack sh....

You'll see a dyno test in the next issue of The Corvette Restorer where a '67 327 lost power without the air cleaner relative to the OE air cleaner and a cellulose element.

Duke

I just thought of something. How well does the air filter box work for a 62 FI Corvette. It has the large paper element and it a whole lot less expensive than the 63-65. I can plumb with aluminum tubing to get air to it. What do you gurus think of that??

[Clem Z.]

Re: FI racing air cleaner

If I can find an air box with a rectangular filter that will fit under my hood do you have any idea what area of filtration will move 700CFM. ie is it a 120 square inches or 150 or??
It really chaps me to think about spending nearly $3000 for a Podel repop.

how much do you spend to go to a race and not run well ????