pezzler Posted November 25, 2008 Share Posted November 25, 2008 does anyone have a template with measurements to make a restrictor ring? also, what would be the minimum level of restriction? would i be able to set a boost controller to run 1.2bar, with say for example, a ring fabricated for 0.7? cheers Quote Link to comment Share on other sites More sharing options...
Stonkin Posted November 25, 2008 Share Posted November 25, 2008 I believe someone like CW will be able to make you a ring of any size, think most people either go with a 1.0 or 1.2 bar though. 0.8 is the standard boost, so cant imagine it being a good idea to go any lower. I doubt someone will give you measurements for them, it may only be a piece of metal, but the likes of Chris spent time originally working this out, and for the price they are from him it would be easier to just buy one mate. Quote Link to comment Share on other sites More sharing options...
pezzler Posted November 25, 2008 Author Share Posted November 25, 2008 i was under the impression that restricting the exhaust flow to regulate the boost pressure was a matter of trial and error due to the variables with each individual car. i would buy one but i dont see the point in buying a 1bar restrictor ring if it doesnt restrict me to 1bar. it would be quicker and free to make one at work using trial and error to get it perfectly catered for my car. was just wondering what diameter hole is the norm on a "1 bar" ring so i could work from there. the reason why i want to restrict to 0.7 or 0.8 bar (stock levels) is purely to reduce possible wear and tear on my engine, but still have the ability to boost upto 1.2 with a controller when required. just needed to know if increasing boost to a peak level of 1.2 bar with a ring cut for 0.8 bar is perfectly safe to do. cheers Quote Link to comment Share on other sites More sharing options...
Stonkin Posted November 25, 2008 Share Posted November 25, 2008 i know a lot of people fit 1.0 bar rings and turn up the boost to 1.2 without an issue. I cant imagine a 0.8 ring will cause any problems, only thing i can think of is heat build up, but im sure someone will clarify that shortly Im not able to help you on sizes im afraid, but one thing to remember is that with changes in air temperature (its getting very cold) you will be unlikely to ever get the boost to exactly be and stay at, the size ring you fit, all year round. There are so many people on here that have bought a certain size ring and been happy that boost stays very close to that level. I do not believe the variables will differ that much on everyone cars. Its up to you mate, but seems a lot of hassle to make one, when it could be in the post to you on its way. Quote Link to comment Share on other sites More sharing options...
pezzler Posted November 25, 2008 Author Share Posted November 25, 2008 cheers for the info; intersted now to see if any has fitted a sub 1 bar ring Quote Link to comment Share on other sites More sharing options...
Dave17 Posted November 25, 2008 Share Posted November 25, 2008 I can't really think why it would be a problem to do this, except as mentioned above, a smaller diameter hole is going to cause higher EGT's, which won't be beneficial to anything. Quote Link to comment Share on other sites More sharing options...
merckx Posted November 25, 2008 Share Posted November 25, 2008 (edited) Fit a 1 bar restrictor ring or there abouts and use your right foot to control the boost if you want less by taking your foot off the accelerator. Edited November 25, 2008 by merckx (see edit history) Quote Link to comment Share on other sites More sharing options...
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