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The mkiv Supra Owners Club

1st decat for TT


k9l3

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Wouldn't be so sure on that one. With your car being a UK, you will not require a restrictor ring at all.

On a J-spec with first de-cat only, I don't think the second cat will provide enough resistance to keep the boost level in check.

Therefore a restrictor ring would be necessary.

 

You could always fit a 1 bar restrictor ring and use a boost controller to increase the boost.

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You won't need a RR if you're just removing the 1st decat as the 2nd one is enough of a restriction. Mine held at 0.8bar with the 2nd cat and a Nur Spec R in place.

 

hi mate that's great even cheaper. so far so good on the new Rad looks nice i can tell difference in size . just got check for leaks now . if the coolant level stays the same in the bottle that means its ok Ye?

 

so the cat. if I got a hks super drager I need a 2.5 inch preferble ye ?

and will I notice a difference doing just the one as that's all I going to do for now.

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Wouldn't be so sure on that one. With your car being a UK, you will not require a restrictor ring at all.

On a J-spec with first de-cat only, I don't think the second cat will provide enough resistance to keep the boost level in check.

Therefore a restrictor ring would be necessary.

 

You could always fit a 1 bar restrictor ring and use a boost controller to increase the boost.

 

I don't want to get boost controller at the moment so should I still use only a 1 bar rr

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Wouldn't be so sure on that one. With your car being a UK, you will not require a restrictor ring at all.

On a J-spec with first de-cat only, I don't think the second cat will provide enough resistance to keep the boost level in check.

Therefore a restrictor ring would be necessary.

 

You could always fit a 1 bar restrictor ring and use a boost controller to increase the boost.

 

Apparently they may be hybrids, not sure though, but the boost did go up when removing the 2nd cat and no RR.

 

hi mate that's great even cheaper. so far so good on the new Rad looks nice i can tell difference in size . just got check for leaks now . if the coolant level stays the same in the bottle that means its ok Ye?

 

so the cat. if I got a hks super drager I need a 2.5 inch preferble ye ?

and will I notice a difference doing just the one as that's all I going to do for now.

 

Yeah, if you filled it and parked facing up a hill (or front jacked up) with the heather on full hot and let all the air bubble out then topped it up until it stopped, it should be fine :)

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ok I thought there should be. well so far I glad because before a month ago I use to have problems with the gearbox and I changed the oil 3 or 4 times and nothing now works lovely after I got oil cooler then when Rad started leaking started again when got low now Rad in working fine .

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