binfieldx Posted May 15, 2015 Share Posted May 15, 2015 What restrictor ring do I need for my decats? 3" to 2.5" or whiftbitz 3" to 2"? Tom Quote Link to comment Share on other sites More sharing options...
Nic Posted May 15, 2015 Share Posted May 15, 2015 (edited) If you have a boost controller then I'd restrict the baseline boost pressure to around 1bar and then use the boost controller to up the boost to say 1.2bar, if you don't have a boost controller then you want to restrict the boost pressure to around 1.2bar in the higher gears. In terms of restrictor ring size there really isn't a correct answer, it will depend on how free flowing your exhaust is, it's a bit of trial and error to get the correct size opening, best to go slightly smaller then if the boost pressure is too low then you can file/dremel out the hole bigger. I'd contact Paul at Whifbitz and see which he suggests. Edited May 15, 2015 by Nic (see edit history) Quote Link to comment Share on other sites More sharing options...
binfieldx Posted May 15, 2015 Author Share Posted May 15, 2015 Thank you sir Quote Link to comment Share on other sites More sharing options...
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