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Anti sure housing makes them abit doughier onto boost, and generally need more pressure for the same power.

Oh really? I never realized this! From what i can see there is no replacement comp cover without the anti surge

Might just have to sell this turbo then and go for something else.

Generally speaking what would be the best kinugawa for 400rwhp on an rb25 these days? something that doesnt need 4000rpm to start spooling! Oh also it seems i have the smaller exhaust housing of the 2 that are available, would getting the bigger one make it more laggy ?

it seems the anti surge is meant to act like somewhat of a blow of valve? very weird because when i got my car tuned i asked not to put a blow of valve on the pipework but it kept blowing of inter cooler pipes so we had to install one...

Just recently got my rb25 tuned ... I only got 350rwhp out of the td07 t25g with 10cm anti surge comp housing @ 18 psi... I was thinking its good for 400hp at those psi levels ? ...

Any ideas why it didn't hit 400?

Typical supporting mods, 550cc inj, z32 afm, powerfc, 3" dump intO twin 2.25 no cat, big fmic and forward facing plenum.

Who tuned it, and how do other RB25 compare on that dyno? Odds are that it's nothing to do with the turbo itself.

Anti sure housing makes them abit doughier onto boost, and generally need more pressure for the same power.

I've heard this quite a bit but haven't seen the testing which confirms this - is there a thread or some results which show this? I'm still really impressed with the only Kando turbo I've used so far, it appears to have no issue at all with spool or making power per psi - with an 8cm internal gate making 20psi by 3600rpm on a stock SR20DET, 250rwkw at 16psi on E85. If a non-antisurge one is substantially better, then wow.

I will backup the anti surge housing also, I had the t67-25g with anti surge, replaced it with his normal cover and gained nearly 800rpm response on same boost, brought it alive, this is all on e85 and 22psi. I wouldn't bother with the anti surge housing in the first place.

Hey Methz, I was totally wracking my brain to remember who it was who tried... I couldn't find your post in the 280 odd pages.

Thanks for chiming in.

Do you have the graphs to support?

I will backup the anti surge housing also, I had the t67-25g with anti surge, replaced it with his normal cover and gained nearly 800rpm response on same boost, brought it alive, this is all on e85 and 22psi. I wouldn't bother with the anti surge housing in the first place.

Interesting - what were the relative spool and power numbers? Was there absolutely no other change in the whole setup? Probably no need for the anti-surge in most cases anyway, but still... I'm surprised that there is that big a difference. I'm not surprised there is perhaps a slight difference - though.

no graphs, car came off dyno made 455rwhp 22psi stock rb25, drove around for a few weeks, was real slow onto boost, around 4800 I was making fullboost on dyno and road testing. had a mate with normal front cover lying around so I switched them and on the road its all on at 4k, nothing else was changed.

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Yes - as far as I know they are. The 16Gs from all I have heard have tended to be a little more flow friendly in the "TD06" compressor housings that most of them come from Kando with, not sure exactly how true that is but the 16G cars with the bigger housings seem to punch the better numbers... we treated that as plausible enough that it's what was decided on

Can someone tell me, is the trust t517Z comp wheel and the TD05 16G6 comp wheel the same wheel?

cheers

darren

YEZZZ is same.

The numbering is simple, T517Z for TD05 16G6 and 518 for 18G variant. Likewise T618Z is TD06 18G.

MHI do have a 17C compressor but it is not a suitable candidate, so don't fret its definitely not 517 for 17C.. They called it a 517 because the 16G6 is a larger version of the original 16G.

I will backup the anti surge housing also, I had the t67-25g with anti surge, replaced it with his normal cover and gained nearly 800rpm response on same boost, brought it alive, this is all on e85 and 22psi. I wouldn't bother with the anti surge housing in the first place.

Mines making 20psi and 250rqhp at about 4700 rpm at the moment on 98 pump fuel, maybe changing to non anti surge housing will help , but what rear housing did you have ?

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