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David Barnes
TryHard
Qld
Celsior V8

Posts: 300
Reg: 06-2008

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Thursday, September 03, 2009 - 03:19 pm, by:  David Barnes (Toyota_celsior) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

Hi everyone,

Just changed the oil in my TT yesterday for the 1st time since taking ownership, anyway I could swear that its down on power now.

Using Nulon Fully synthetic 10w-40.

This is the 1st turbocharged car I have owned and im normaly use to high powered v8's and normally from an oil change one can expect to gain back a bit more power, do the turbos like crappy old oil or something haha?

2nd question related to increasing the boost, At the moment I have only replace the very rear section of the exhaust from the rearmost flanges back with just pipe instead of the mufflers and running the stock intercooler.

Can I increase the boost at all (if even only by a little bit) with the factory pipes in place or does it generate too much heat in the turbos hence failure?

Thanks :-)
Peter Nitschke
Junk Filterer
South Australia
UZZ30 UZZ31

Posts: 10823
Reg: 11-2004

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Thursday, September 03, 2009 - 04:24 pm, by:  Peter Nitschke (Pen) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

Changing the oil is not normally a power mod unless the old oil was really thick and chunky in which case the new oil might appear to add power.
Marc Hoffmann
Tinkerer
Vic
Soarer TT

Posts: 45
Reg: 07-2009

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Thursday, September 03, 2009 - 04:34 pm, by:  Marc Hoffmann (Rushed) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

i run the same oil after buying my soarer, and motor felt a tad better afterwards the oil that was in it was rancid.

reset the ecu using the guide after buying a soarer is a nice idea to try.

i have just a cat-back and front mount and i get 11psi naturally, i did a full BFI and got no increase boost, im sure im limited by the front half of the exhaust but am waiting to get my hands on a set of dump pipes before changing it.

from a bit of reading you'll find that a dump back (often with std dump) exhaust will generally increase boost to boost cut without the need for a boost controller, how stable it is at that boost is another issue, and also help the turbos last longer etc etc.
David Barnes
TryHard
Qld
Celsior V8

Posts: 301
Reg: 06-2008

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Saturday, September 05, 2009 - 01:44 am, by:  David Barnes (Toyota_celsior) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

Is it safe to increase boost via a boost controller with stock exhaust less rear mufflers?
Aaron Casey
Goo Roo
nsw
'94 jzz30 gttl, 2 mini's one supercharged :-)

Posts: 1314
Reg: 08-2005

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Saturday, September 05, 2009 - 10:48 am, by:  Aaron Casey (Blownminiturbo) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

yeah just try not to go over 12.5psi depends on your turbo's cause they are ceramic they dont like high boost and you will hit boost cut at 14
Jeff Bedsor
DieHard
QLD
TT

Posts: 645
Reg: 10-2006

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Monday, September 07, 2009 - 07:51 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)


Aaron Casey wrote on Saturday, September 05, 2009 - 10:48 am:

yeah just try not to go over 12.5psi depends on your turbo's cause they are ceramic they dont like high boost




Why are you guys stuck on this ceramic wheel not being able to take high boost? There are a lot of us running 17+ psi with no problems. I have run 20-22 thorough mine for over 12 months and both wheels look like new.
Aiden Cheese
Tinkerer
QLD
Soarer jzz30

Posts: 13
Reg: 09-2009

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Monday, September 07, 2009 - 08:07 am, by:  Aiden Cheese (Chillpen) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)


Jeff Bedsor wrote on Monday, September 07, 2009 - 07:51 am:



Not sure about you but I watched one of these explode and ruin a motor. It was in a r33GTST, wound the boost up to about 14psi and when the throttle dropped the ceramic blades shattered and went through the engine.

I'd be careful.
David Barnes
TryHard
Qld
Celsior V8

Posts: 303
Reg: 06-2008

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Wednesday, September 09, 2009 - 11:48 am, by:  David Barnes (Toyota_celsior) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

Well I did it,

Bought a Boost (manifold positive pressure) gauge from a truck wreckers for nothing, the bloke said just take it. Also got a random (Air filter restricting gauge) basically a very very light vacuum gauge which you tap in just after the filter, as it becomes clogged the reading will get higher.

I made a boost tap from 2 barbed air compressor fittings, put a light compression spring and a ball bearing in the middle, cost me $5 :-)

Anyhow, the car does make slightly more power with stock exhaust and more boost (more so when the temp dies down at night), but you can really tell the stock exhaust is holding it back, the engine simply cant make any more power and is no doubt just creating more heat. Also I happened to met our friend boost cut while playing around with the boost tap, gee its not very friendly.

But I will be taking the car out to Willowbank for a test and tune over the next couple of weeks and will remove the exhaust from the dump pipe completely so increasing the boost wont be an issue.

Today im going to make a intercooler water sprayer as the poor side mount is getting heat soaked very easily, There is a noticeable difference in power if you put your foot down a few times in a row in a short period of time.

Question, when sitting stationary with the engine running does the intercooler build or loose heat soak?
Aiden Cheese
Tinkerer
QLD
Soarer jzz30

Posts: 20
Reg: 09-2009

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Wednesday, September 09, 2009 - 12:05 pm, by:  Aiden Cheese (Chillpen) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

I don't know.

I want to still make the guess that "yes it builds heat soak" because without airflow the car will maybe be cooling down a bit but you're not leaving any of the hot air behind you.

Hence the benefit of a water to air intercooler system i guess.

(just a guess)

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