FRC Joe

Has anyone used a restrictor plate with the newer style plastic inlet elbow from the A&A kit? I'd be interested in seeing the method of mounting you used. I'm not crazy about just leaving the plate held in by friction in the filter. In several test fittings it's been very easy for the plate to accidentally slip out into the filter. I've got a couple of ideas for mounting it securely but would love to get a peek at other solutions. Thanks!

Warp Factor

Make something like this?
Mine has a second smaller restrictor attached, so ignore that part.
Use nyloc nuts, maybe some loctite too. Don't need those parts going through the blower.
I guess stainless button-heads would have looked nicer than philips screws, huh.

FactoryRaceCar

Joe I have the plate out and I will take a picture for you later on when I get back home. It fits VERY snug and wont slip and drop into the filter.

FRC Joe

That looks like a great design . Unfortunatley for me the A&A filter is an offset outlet model with no usable lip on the inside for more than 180°. I thought about a simlar plate that would only be secured on one side, but now am leaning towards making the restrictor(s) 1/4" thk and able to slide into the end of the tube with an interference fit. The thickness will be enough to drill and tap into the sides for #8 fasteners. I figure a minimum 3 flat head fasteners in countersunk holes through the plasitic elbow. The filter clamp can then be really cranked down without fear of deforming the plastic elbow since the restrictor will be directly under it. I dunno though, I cant help but thinking a simpler solution is out there.

FreddyG

Here's an idea that I had that might work for you:

If you cut it out of some type of thinner gauge sheet metal, then you can bend the tabs up towards the motor and then put the filter over the tabs and clamp it down. The tabs will hold the restrictor and the clamps/air filter will hold the tabs. Make sure that the hole size is right because I don't think that you'd want to mess that up or it could be a Big mess!

Good Luck!

Warp Factor

I've wondered if one of the prefilters, or filter cover "socks" might reduce flow enough, and provide better filtering at the same time.

Such as THESE

JeremiahsC5

Going to follow this thread. Very interested in getting this set up done right.

SLPRC5

Restrictor Plate? Please tell me the purpose of the plate.
Thank you

FRC Joe

Thanks Nouman!

I was thinking of something similar, using a different, thinner material for tabs. Something like .250" wide strips of stainless shim stock riveted to the plate. The thinness would be to prevent an air leak back into the filter. It also worth noting that the "fold" of the material will be trying to conform to the round shape of the inlet tube, so having a wide tabs will cause problems.

A restrictor plate limits the amount of air able to go into the supercharger inlet. At lower RPMs, the plate is able to flow enough air to keep the pressure at the inlet at or near atmospheric, so the blower makes boost normally. At higher RPMs when the blower's demand for air is greater, the restrictor lets less air through. The pressure at the blower inlet then begins to drop below atmospheric, and the boost the blower is able to make is similarly lowered. A restrictor allows you to run a small pulley that will make boost early, but them limit the top end boost to preserve a stock motor. I'm having 5 plates made with the area of the openings in .25in² increments from 5in² to 6in². Hopefully one of them will land me at 10psi max boost, or out comes the power drill!

SLPRC5

A restrictor plate limits the amount of air able to go into the supercharger inlet. At lower RPMs, the plate is able to flow enough air to keep the pressure at the inlet at or near atmospheric, so the blower makes boost normally. At higher RPMs when the blower's demand for air is greater, the restrictor lets less air through. The pressure at the blower inlet then begins to drop below atmospheric, and the boost the blower is able to make is similarly lowered. A restrictor allows you to run a small pulley that will make boost early, but them limit the top end boost to preserve a stock motor. I'm having 5 plates made with the area of the openings in .25in² increments from 5in² to 6in². Hopefully one of them will land me at 10psi max boost, or out comes the power drill![/QUOTE]

Okay, thanks for answer to my question

Warp Factor

Good thoughts, Joe.
I'd be a little wary about going small on material in a high velocity air stream though. Funny resonances can happen, fatiguing a material to failure.
Maybe Skunkworks will comment........I'm convinced he knows much more about some of my pro areas than I do.

Moving air can make flexible things dance around like butt-cheeks in a chile breeze.

C5kid

something like this???



i made a couple of these at work with different diameter holes, those small tabs go around the outside of the intake tube adn the air filter pinches down on them so it's held in place pretty good

FactoryRaceCar

Mine looks just like that! Only with 2 tabs

undertaker

A&A does restrictor plates now too?

Skunkworks

Dude it's a concept older then your and my age put together and then multiplied by X...


Mike

FreddyG

Yep!

undertaker

sweet....so thats where those super dooper plates under the carbs on nascar crapboxes comes from under that carburator thingie majig...

DOUG @ ECS

Concept yes, made Corvette mainstream by. . . .


When we started using these no one had a clue as to why, we had to explain it to everyone, and if you recall.... you were very much against the idea...

Skunkworks

Uhm yes and no... If I remember correctly, concern was over inlet pressure distortion which can be a surge trigger. I think close coupling was the big concern... The Novi 2K has turned out to have a wide operating range and works well with restrictor disk.


Mike

FRC Joe

Man that's the one. Unfortunately I'd already arranged to have these cut with a "laser".



Time for me to get crackin!