Is this possible??? - GT-R Register - Official Nissan Skyline and GTR Owners Club forum

alex h · 16th November 2002, 11:15 PM

I've heard that the latest EVO's come with a sort of actively adjusting exhaust port/flange for their turbo's which I assume is there to improve (reduce) lag....

Have I got my facts arse about face and this "thing" doesn't exist?

If it does exist why the hell don't HKS etc do one?

What are the benefits and probs associated....?

I would ask the Mitsi boys directly...but I just can't be arse to register and don't know what the address of the site is....and if it is true and does help mpre than it hinders I thought it would be a good topic for discussion...

Mycroft · 17th November 2002, 01:06 AM

It is known about and I have desiged a similar device with the help of some of the guys on the MLR forum.

It is part of an ongoing tranche of work regarding Cams/LCA/Reversion designs, have also designed some anti-reversion stuff for them, which should be put to the test soon.

gary · 24th November 2002, 01:32 AM

I saw on it just looked like a twin wastegate poppet valve for each of the seperated exhaust manifold runners to me but I may be wrong
Gary
GT-ART
OFFICIALLY JAPANISE

ebhatti · 28th November 2002, 09:56 AM

i was talking to the director of Ralliart in New Zealand
about what was "new" on the evo 7 and about the bov-
mainfold and he said that the evo 4-7 have a system that only works on the rally cars (but is on the road cars and is not working)
where they have two bov one to the atm and the other goes in to the exaust mainfold to help with anti-lag

the reason i asked him was because i herd that the evo 7 had a system ~as explaned above~
and i wanted to try it out on my car to see if it worked
needless to say i didnt do it...next time and when i pay off the car

hope this helps...
--------------
Phothog

16th November 2002, 11:15 PM	#1 (permalink)
alex h GTR Register Member Join Date: Mar 2002 Location: East of England Posts: 426	Is this possible??? I've heard that the latest EVO's come with a sort of actively adjusting exhaust port/flange for their turbo's which I assume is there to improve (reduce) lag.... Have I got my facts arse about face and this "thing" doesn't exist? If it does exist why the hell don't HKS etc do one? What are the benefits and probs associated....? I would ask the Mitsi boys directly...but I just can't be arse to register and don't know what the address of the site is....and if it is true and does help mpre than it hinders I thought it would be a good topic for discussion...

24th November 2002, 01:32 AM	#3 (permalink)
gary GTR Register Member Join Date: Aug 2001 Location: UK Posts: 1,363	WHEN I saw on it just looked like a twin wastegate poppet valve for each of the seperated exhaust manifold runners to me but I may be wrong Gary GT-ART OFFICIALLY JAPANISE

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17th November 2002, 01:06 AM	#2 (permalink)
Mycroft Banned Join Date: Apr 2002 Location: Up someones nose, apparently Posts: 3,561	It is known about and I have desiged a similar device with the help of some of the guys on the MLR forum. It is part of an ongoing tranche of work regarding Cams/LCA/Reversion designs, have also designed some anti-reversion stuff for them, which should be put to the test soon.

28th November 2002, 09:56 AM	#4 (permalink)
ebhatti New Users Join Date: Dec 2002 Location: wolverhampton Posts: 3	i was talking to the director of Ralliart in New Zealand about what was "new" on the evo 7 and about the bov- mainfold and he said that the evo 4-7 have a system that only works on the rally cars (but is on the road cars and is not working) where they have two bov one to the atm and the other goes in to the exaust mainfold to help with anti-lag the reason i asked him was because i herd that the evo 7 had a system ~as explaned above~ and i wanted to try it out on my car to see if it worked needless to say i didnt do it...next time and when i pay off the car hope this helps... -------------- Phothog