Re: Ez plate system
 

when running a 4150 carb, there is no better than the adjustable restrictor plate manufactured by Willys and sold through Summit, Jegs and others.

Been using this plate since 2008. Previously to slow my 9 second Chevelle to 10.0 and since 2009 to slow my 8 second Firebird to 9.0 enabling me to run 9.0x all season long at every track I compete.

http://i381.photobucket.com/albums/o...ICTORPLATE.jpg

This 1" 4 hole plate has 18 turns of adjustment in it from fully open 1.75" bore(s) to 1.00"

Each turn is worth ~.04 and can easily kill 100HP.

Nothing to take apart or swap out, couldn't be easier or simplier. Adjustment(s) take a few seconds and as Rich has stated, infinitely adjustable.

Several competitiors and friends are now using it on their 8 to 11 second rides to slow them to make ET cutoffs and/or index classes as well I know of 1 former Division 1 Super Street Champion now using it after hearing about and seeing it in use on my car.

Re: Ez plate system
 

If you turn it in 3 or so turns, do you have to lean out the carb to make up for the reduced air flow ?

Re: Ez plate system
 

No, I never touch the jetting.