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The mkiv Supra Owners Club

what is the internal measurment of the restrictor ring


mikeyh

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i measured my restrictor ring today as im geting over boosting problems:(

 

thought i might need a smaller one now im running envy hybrids have any of you guys come across this problem when going the hybrid route:)

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I'm pretty sure thats the correct size for the 2.5in decatt pipes CW supplies. I get 1.25 bar below 10degreesC, 1.1 ar 20degreesC

i measured mine today and it was 52mm do you think this is to big only problem being im not sure what size my decats are or what make they are:rolleyes:

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i measured mine today and it was 52mm do you think this is to big only problem being im not sure what size my decats are or what make they are:rolleyes:

The size is perfect if you're reaching the boost you want to run.

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when i went to buy a restrictor ring i thought it would be some well made bit of kit,that needed to be just right.....OHHHHHH how wrong i was!!!!!!!!took it to my local custom exhaust maker and he pissed himself laughing...then went on to tell me he woulda made me 5 for the price i had paid:d

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The size is perfect if you're reaching the boost you want to run.

thats the problem im overboosting like mad and thought that maybe there was a problem with the restrictor ring now im running hybrids:)

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It really seems to depend on the car. I know several people with the same CW decatt pipes and restrictor ring as me, some struggle to see 1 bar, others (like mine) hit fuel cut any time its a little chilly! If you're on hybrids thats probably even more difficult to predict.

 

Trial and error is your best bet - Start with a highly restrictive ring and keep refitting until its where you need it to be. At least if you fit the ring between the 1st and 2nd pipes its easy to remove & replace.

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when i went to buy a restrictor ring i thought it would be some well made bit of kit,that needed to be just right.....OHHHHHH how wrong i was!!!!!!!!took it to my local custom exhaust maker and he pissed himself laughing...then went on to tell me he woulda made me 5 for the price i had paid:d

 

As mine are laser cut heavy gauge steel I suspect you didn't source it here then....

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can it cause any damage to turbos if a put one in that was to small say 45mm

 

the reason i ask is because i was thinking of puting a small one in and seeing if it made any difference but dont want to break nething else:search:

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