Supercharger Discussion For all you misguided souls.
Sponsored by:
Sponsored by:

rotrex restrictor/wastegate

Old 03-29-2013, 10:21 AM
Senior Member
Thread Starter
iTrader: (22)
Join Date: Oct 2007
Location: bay area, ca
Posts: 550
Total Cats: 19
Default rotrex restrictor/wastegate

Are any people with the rotrex buying the bigger head units and running a restrictor plate or wastegate (to bleed off the intake) to limit peak power? Do IATs noticeably increase when spinning it faster vs giving up area under the curve and running a bigger pulley without a restrictor?
orion4096 is offline  
Old 03-29-2013, 02:52 PM
Junior Member
Join Date: Sep 2008
Posts: 60
Total Cats: 2

I did use a WG for bleeding off boost on a c38-61, built NB. The problem was that the Rotrex never gave enough omphh making any boost control necessary even when overspinning it 10%. If you ever consider a Rotrex build on a built engine go C38-81 or even 91 with a WG before IC. The real challenge with a rotrex build is making the mounting bracket stiff enough + a 8-rib setup.
If I was about to do that again on a BP I would place it down low where the AC pump is located. Good luck.
arildh is offline  
Old 04-19-2013, 11:36 AM
Join Date: Feb 2013
Posts: 22
Total Cats: -2

I read on the Rotrex A/S site (been a year or so back) that restricting the compressor does limit maximum boost, and by using a smaller pulley to speed up the compressor, would create boost earlier on a restricted compressor, ie. fatten the midrange. I'll see if I can find the info and link it. I was reading all I could find on the Rotrex when trying to decide which way I wanted to go. I ended up with the C30-74 unrestricted @9psi. Not in the realm of the great turbo monsters, but I can dust quite a few surprised Mustangs and Camaros, and run with many of the big dogs now.
Burnout is offline  
Old 10-11-2013, 03:38 AM
Senior Member
iTrader: (6)
Join Date: Jun 2010
Location: San Rafael, CA
Posts: 1,359
Total Cats: 69

I expect IAT's to increase from restricting the intake no so much EGT's. Bleeding off boost via wastgate will affect IAT's. Depending on your perspective it will go up or down. It's best to plot it out on a compressor map to understand the effect.

Last edited by k24madness; 10-11-2013 at 11:38 AM.
k24madness is offline  
Related Topics
Thread Starter
Last Post
Engine Performance
11-22-2015 04:11 AM
Lincoln Logs
Dynos and timesheets
09-23-2015 12:26 PM
09-20-2015 04:54 PM
Supercharger Discussion
02-14-2014 12:42 PM
Supercharger Discussion
04-13-2011 08:04 PM

Thread Tools
Search this Thread
Quick Reply: rotrex restrictor/wastegate

Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to and affiliated sites.