ECS restrictor plate
Thread Starter
Drifting
Joined: Nov 2007
Posts: 1,813
Likes: 0
From: Tampa Fl
ECS restrictor plate
I wouold like to see a pic of this restrictor plate i hear so much about. Im am interested in purchusing one and i would like to know how much they cost and how they bolt up. Thanks mike
Le Mans Master
Joined: Sep 2001
Posts: 8,840
Likes: 43
From: State of Confusion.
It doesn't bolt up. It's snug fit into the air cleaner and is held in place by the intake tube/bridge. As far as cost, the best thing to do is call ECS or A&A.
Here's a picture of one installed:
Here's a picture of one installed:
Le Mans Master
Joined: Oct 2005
Posts: 7,088
Likes: 1,829
From: Metro Detroit Michigan
Caution....
Just a snug fit will not stay snug usually and the plate will either drop down inside the filter or go sideways. You need to support it with either a second side plate with screws to keep it in one place or 2 small zip ties wrapping around the inside edge and then through the filter media edge which will hold it in place (how mine is and works just fine).
Some filters do have a underneath "shelf" the plate can rest on but usually not.
Just a snug fit will not stay snug usually and the plate will either drop down inside the filter or go sideways. You need to support it with either a second side plate with screws to keep it in one place or 2 small zip ties wrapping around the inside edge and then through the filter media edge which will hold it in place (how mine is and works just fine).
Some filters do have a underneath "shelf" the plate can rest on but usually not.
At the time of the photo, I had a second smaller plate mounted to the larger one.
Melting Slicks
Joined: Nov 2006
Posts: 2,836
Likes: 8
From: Still the Fastest (still running) Stock Bottom End Blown LS1/ 2010 ECS CC 10.50 CHAMP Hamilton, NJ
3 full seasons plus track rentals and many other track days. Air filter holds it in, nothing else. never had a problem, never had it come loose... 280+ passes at the track! 
Le Mans Master
Joined: Sep 2001
Posts: 8,840
Likes: 43
From: State of Confusion.
Someone with more pulley knowledge than me hopefully will chime in!
Premium Supporting Vendor
Joined: Oct 2004
Posts: 23,599
Likes: 1,224
From: Providing the most proven supercharger kits for your C5/6/7 609-752-0321
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
How Much Horsepower Every Corvette Engine "LOST" in 1972
Joe Kucinski
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!
Michael S. Palmer
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)
Joe Kucinski
Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!
Verdad Gallardo
Top 10 Corvettes Coming to Mecum Indy 2026!
Brett Foote
Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!
Michael S. Palmer
Premium Supporting Vendor
Joined: Oct 2004
Posts: 23,599
Likes: 1,224
From: Providing the most proven supercharger kits for your C5/6/7 609-752-0321
Caution....
Just a snug fit will not stay snug usually and the plate will either drop down inside the filter or go sideways. You need to support it with either a second side plate with screws to keep it in one place or 2 small zip ties wrapping around the inside edge and then through the filter media edge which will hold it in place (how mine is and works just fine).
Some filters do have a underneath "shelf" the plate can rest on but usually not.
Just a snug fit will not stay snug usually and the plate will either drop down inside the filter or go sideways. You need to support it with either a second side plate with screws to keep it in one place or 2 small zip ties wrapping around the inside edge and then through the filter media edge which will hold it in place (how mine is and works just fine).
Some filters do have a underneath "shelf" the plate can rest on but usually not.
incorrect.
Racer
Joined: Dec 2006
Posts: 322
Likes: 0
From: Alexandria Louisiana
St. Jude Donor '08
Comparisons
Doug - Have U ( or anyone ) done some back to back dyno runs comparing the use of your plate? My understanding is that it will help get the blower into boost a little sooner but at the expense of some loss of top end power. I'd like to see how much power is "lost" ( or perhaps "delayed" is a better word ) at the higher rpms so that I can more easily make the decision as to whether or not it fits my own needs. 
Gene
P.S. Found this thread & although it doesn't have dyno sheets it DOES add some pretty good info. "search" is my friend!!
http://forums.corvetteforum.com/show....php?t=2138253
Gene
P.S. Found this thread & although it doesn't have dyno sheets it DOES add some pretty good info. "search" is my friend!!
http://forums.corvetteforum.com/show....php?t=2138253
Last edited by Mean Gene55; Sep 24, 2008 at 11:04 AM. Reason: add hyperlink
Advanced
Joined: Apr 2008
Posts: 53
Likes: 0
From: Europa, Estonia
What happens if I make intake piping same size as restrictor size ?
its inside diameter is 2,75" .
From filter to supercharger 2,75" piping, in the end near novi pipe that makes 2,75 to 4" so it fits SC , is this same as big 4" intake piping with restrictor or is it not... ? Problem is that I cant put filter to standard location beacuse of custom install and have to use smaller pipes ... logically thinking,airflow should be same,beacuse max diameter allowed is still 2,75" so it should not matter ... is this limiting car power somehow or not ?
It seems that there is not much info on that case, I did the search :-/
its inside diameter is 2,75" .
From filter to supercharger 2,75" piping, in the end near novi pipe that makes 2,75 to 4" so it fits SC , is this same as big 4" intake piping with restrictor or is it not... ? Problem is that I cant put filter to standard location beacuse of custom install and have to use smaller pipes ... logically thinking,airflow should be same,beacuse max diameter allowed is still 2,75" so it should not matter ... is this limiting car power somehow or not ?
It seems that there is not much info on that case, I did the search :-/
Last edited by Maikmadi; Apr 12, 2009 at 11:47 AM.
Team Owner
Joined: May 2006
Posts: 21,473
Likes: 356
From: Palmdale, Ca----- 2009 Cyber Gray 4LT A6 F55 452 RWHP 422 RWTQ- RIP 1998 C5 734 RWHP & 585 RWTQ-----
Without restriction I gained 2.5 PSI of BOOST so on the flip side you could see a loss of that or more depending on the restictor size!
This is what I would probably need to do if I go to a D1SC
Thanks,Matt
This is what I would probably need to do if I go to a D1SC
Thanks,Matt
