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Austen Menze
Goo Roo
WA
GT-TL

Posts: 1192
Reg: 07-2009

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Sunday, October 17, 2010 - 09:23 pm, by:  Austen Menze (Mercyfulfate) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

A little bit confused here and hope somebody can clear it up.
I've noticed on Toyodiy
http://www.toyodiy.com/parts/p_J_1993_TOYOTA_SOARER_JZZ30-ACPZZ_1701.html that there is a gasket which seals in between the turbo housing and the exhaust manifold.

But I've never read anything about it, and mine didnt have any when I took them off.

What gives?
Scott Wilkes
Goo Roo
Tasmania
92 TT Factory Manual, 70 HG GTS Monaro

Posts: 1822
Reg: 10-2008

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Sunday, October 17, 2010 - 09:30 pm, by:  Scott Wilkes (Scottywilkes) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

it will have 1, it will be squashed to buggery.

Basically its just a metal donut which will slot into a recess in the manifolds. Its worth replacing as it gets compressed so far that it wont seal 100% next time you torque the turbo up.

I replaced mine the first time i had them off with a couple from a exhaust shop, didnt bother the next 2 times though.
Austen Menze
Goo Roo
WA
GT-TL

Posts: 1193
Reg: 07-2009

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Sunday, October 17, 2010 - 09:46 pm, by:  Austen Menze (Mercyfulfate) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)


Upload

The ring around the port? THAT is a gasket? haha that's some funny

How did you go about removing the old one?
Scott Wilkes
Goo Roo
Tasmania
92 TT Factory Manual, 70 HG GTS Monaro

Posts: 1823
Reg: 10-2008

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Sunday, October 17, 2010 - 09:55 pm, by:  Scott Wilkes (Scottywilkes) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

it is my friend, just used a pick :-)

If thats your manifold it can be opened up more than that, and worth enlarging and smoothing out the manifold internally as thats just as restrictive
Austen Menze
Goo Roo
WA
GT-TL

Posts: 1194
Reg: 07-2009

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Sunday, October 17, 2010 - 10:21 pm, by:  Austen Menze (Mercyfulfate) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

Ahh ok. Yeah that's mine mate. Do you have any pics of your manifold? I'm looking to open it up as much as I can before putting the hybrids on :-)
Scott Wilkes
Goo Roo
Tasmania
92 TT Factory Manual, 70 HG GTS Monaro

Posts: 1825
Reg: 10-2008

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Sunday, October 17, 2010 - 10:43 pm, by:  Scott Wilkes (Scottywilkes) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

a few photos, not the best to show how much i opened it up though









this is before i finished cleaning the dags up and polished the runners

BTW, new manifold gaskets to^^ haha
Austen Menze
Goo Roo
WA
GT-TL

Posts: 1195
Reg: 07-2009

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Sunday, October 17, 2010 - 10:53 pm, by:  Austen Menze (Mercyfulfate) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

Thanks Scott.
Looks like a LOT of time has been put into that haha! I spent a couple hours on mine today using ali oxide grinding wheels.

What tools and bits did you use?

I think I'll get new manifold gaskets too :-) What's this pick you used?
Jeff Bedsor
DieHard
QLD
TT

Posts: 936
Reg: 10-2006

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Monday, October 18, 2010 - 09:17 am, by:  Jeff Bedsor (Jeff_bedsor) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

A smooth one -

Upload
Austen Menze
Goo Roo
WA
GT-TL

Posts: 1197
Reg: 07-2009

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Monday, October 18, 2010 - 09:26 pm, by:  Austen Menze (Mercyfulfate) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

Thanks guys. I opened up the turbo port a bit more today and took a bit more meat off the inside exiting the turbo port.

Tried to use bearing blue to give me an idea of how far to open it but the castings are a bit too rough for that to be effective.

Jeff, it doesn't look like you have taken much off the inside as the casting marks are still there? Did you just mainly work around the ports?
Boris Siljanoski
Goo Roo
Western Australia
LS400 + Soarer.

Posts: 1174
Reg: 11-2007

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Monday, October 18, 2010 - 09:57 pm, by:  Boris Siljanoski (Z2tt) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

Interested in this mod.... Make much of a difference?
Scott Wilkes
Goo Roo
Tasmania
92 TT Factory Manual, 70 HG GTS Monaro

Posts: 1830
Reg: 10-2008

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Monday, October 18, 2010 - 10:10 pm, by:  Scott Wilkes (Scottywilkes) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

i had to enlarge my wastegate ports 2.5mm each as after i performed this the turbos were overboosting BAD, would peak to 26psi haha.

Cant say if this was directly related to this or not, but i didnt change anything else.

Once the gates were opened up slightly i could hold a steady 14psi, of course i upped that to 20psi for daily duties :-)
Austen Menze
Goo Roo
WA
GT-TL

Posts: 1201
Reg: 07-2009

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Monday, October 18, 2010 - 10:26 pm, by:  Austen Menze (Mercyfulfate) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

Oh crap.. I don't want 26psi through hybrids I'll bust my transmission.

Do you have pics of the wastegate porting too?
Boris Siljanoski
Goo Roo
Western Australia
LS400 + Soarer.

Posts: 1176
Reg: 11-2007

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Monday, October 18, 2010 - 10:35 pm, by:  Boris Siljanoski (Z2tt) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

Peak to 26 PSI? What did it used to peak at normally.
Jeff Bedsor
DieHard
QLD
TT

Posts: 939
Reg: 10-2006

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Tuesday, October 19, 2010 - 08:24 am, by:  Jeff Bedsor (Jeff_bedsor) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)


Austen Menze wrote on Monday, October 18, 2010 - 09:26 pm:

Jeff, it doesn't look like you have taken much off the inside as the casting marks are still there? Did you just mainly work around the ports?



Austen - not sure what you mean, but I didn't enlarge the actual port just open up the inside. When I take then off to put the new turbo's on I might do some more.
Scott Wilkes
Goo Roo
Tasmania
92 TT Factory Manual, 70 HG GTS Monaro

Posts: 1832
Reg: 10-2008

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Tuesday, October 19, 2010 - 05:47 pm, by:  Scott Wilkes (Scottywilkes) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

when i say peak it would spike to 26psi, was the most i was keen to hold the throttle haha.

Im guessing this was due to the extra flow the wastegates couldnt divert enough flow and as such the gases continued to spool the turbo up

Before porting i could hold 14psi no worries, ran at 20psi generally
Austen Menze
Goo Roo
WA
GT-TL

Posts: 1208
Reg: 07-2009

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Tuesday, October 19, 2010 - 08:58 pm, by:  Austen Menze (Mercyfulfate) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

Just opening up the manifold exit wouldn't make it boost uncontrollably will it?
Jeff Bedsor
DieHard
QLD
TT

Posts: 945
Reg: 10-2006

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Wednesday, October 20, 2010 - 08:32 am, by:  Jeff Bedsor (Jeff_bedsor) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

No, I would say the wastegates weren't opening.
Scott Wilkes
Goo Roo
Tasmania
92 TT Factory Manual, 70 HG GTS Monaro

Posts: 1838
Reg: 10-2008

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Wednesday, October 20, 2010 - 05:35 pm, by:  Scott Wilkes (Scottywilkes) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

if they wernt opening they would spike to over 26psi as soon as they would start to spool up.

It would hold reasonably steady until about 5000rpm then start to creep upwards

Im having the same problem with my GT3076R now with a 38mm turbosmart wastegate, the gate is to small to control the exhaust gases and as such im getting boost creep. A 45mm tial gate will solve this problem :-)

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