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Location:
Colac, Victoria
Registered:
May 2002
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Gt4 turbo clocking
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Mon, 27 September 2004 09:18
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Anyone here attempted to clock the ct26 on a Gt4 before - and if so - was it possible without major arsing about ?
having some issues with my intercoler piping that requires the turbo to be flipped 180 deg or there abouts so that its facing sorta down ..
help!
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I supported Toymods
Banned User
Location:
Brisbane
Registered:
May 2002
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Re: Gt4 turbo clocking
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Mon, 27 September 2004 09:29
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The only problem you'll have is the wastegate actuator mounting. I turned the housings around on my CT20B but then had to modify mounting for actuator. This is probably what you consider arsing about.
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Location:
Colac, Victoria
Registered:
May 2002
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Re: Gt4 turbo clocking
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Mon, 27 September 2004 09:40
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as in the small plate that bolts the actuator to the turbo housing ?
i can see that to be a problem but im sure some crafty bracketry can get around this - ie small extended bracket to go around the turbo inlet to keep the actuator in the same place. from whast i can barely see ( fucking cramped place ) its just bolted on with one small bolt
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I supported Toymods
Banned User
Location:
Brisbane
Registered:
May 2002
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Re: Gt4 turbo clocking
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Mon, 27 September 2004 09:43
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It should be bolted on with 2 bolts.
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Location:
Colac, Victoria
Registered:
May 2002
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Re: Gt4 turbo clocking
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Mon, 27 September 2004 09:55
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theres 2 bolt threads on the turbo housing - only one is used to mount the wastegate on ..
had another quick look - the outlets going to be so close to the radiator thermo fan its not funny - ideally a smaller fan would be better for space - as everything else seems to have room for 2" piping
got some pics hopefully coming
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Location:
Colac, Victoria
Registered:
May 2002
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Location:
newcastle
Registered:
April 2004
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Re: Gt4 turbo clocking
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Tue, 28 September 2004 02:31
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stu,
PM sent 
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Location:
Brisbane, Queensland
Registered:
January 2004
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Re: Gt4 turbo clocking
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Tue, 28 September 2004 08:17
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As far as i know stu, its just a matter of loosening the bolts, and turning the turbo. Then fabricate up the bracketry....
Orrrr you could be a crafty bugger, and get yaself a modded exhaust manifold and get a external wastegate. Then weld your stock wastegate shut, and voila... I'd go that route personally. (Been told having an external gate helps to stop turbulence in the exhaust... having the wastegate join later down the path... worth a look)
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Location:
Colac, Victoria
Registered:
May 2002
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Re: Gt4 turbo clocking
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Tue, 28 September 2004 08:24
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yup - thats how to clock it - i was hopong on some info for those who have done it in where they might have struck problems ..
Re the turbo setup - its only a stopgap swap till i can get the Gt28 in there - which will require a new dump pipe , and external gate anyhew !
and for thise who care - the Gt4 is off to WOLFEMS to get its ecu swap done this weekend - shes booked in for friday so alls sweet!
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I supported Toymods
Banned User
Location:
Brisbane
Registered:
May 2002
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Re: Gt4 turbo clocking
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Tue, 28 September 2004 09:15
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There is a cottor(spelling) pin between housings you need to remove before it will turn.
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Location:
Colac, Victoria
Registered:
May 2002
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Re: Gt4 turbo clocking
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Tue, 28 September 2004 09:22
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I was talkig to allan about this a while ago - he mentioned the pin - and i believe theres a notch in the housing or something to set where the pin will line the turbo up ?
Is that correct ?
If so will i need to re-notch the turbo to get it clocked and set in the right position
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I supported Toymods
Banned User
Location:
Brisbane
Registered:
May 2002
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Re: Gt4 turbo clocking
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Tue, 28 September 2004 09:24
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The pin was pulled out of mine and tossed into the bin. Its not required if the clamp around the housing is tight.
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Location:
Colac, Victoria
Registered:
May 2002
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Re: Gt4 turbo clocking
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Tue, 28 September 2004 09:27
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cool - will keep this in mind 
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Location:
Brisbane
Registered:
March 2004
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Re: Gt4 turbo clocking
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Tue, 28 September 2004 12:12
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What i did was to cut off the right angle bit of pipe off the intercooler and weld that onto the compressor housing so much easier
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Location:
Colac, Victoria
Registered:
May 2002
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Re: Gt4 turbo clocking
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Tue, 28 September 2004 12:31
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Hmms - i dont think that will work for how i hope to have the turbo clocked ...
once the ecu is in ill be able to make some space in that corner to puut piping up and down all over the place
Did you leave the turbo in the stock position or clock it
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Location:
newcastle
Registered:
April 2004
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Re: Gt4 turbo clocking
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Tue, 28 September 2004 21:54
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clocked mine without that much drama
removed locating pin and rotated housing
you will need a slimmer thermo fan and elongate the wastegate
actuator rod and modify the water pipes from turbo to top hose
the photos I'm sending you will show some of it
with more to follow
also, how big is your FMIC??
I ended up cutting a section out of the rio to
fit mine ( re-strenghtened it of course  )
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Location:
Colac, Victoria
Registered:
May 2002
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Re: Gt4 turbo clocking
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Wed, 29 September 2004 02:47
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still havent got the photos in the email mate ..
try again plz ?
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Location:
newcastle
Registered:
April 2004
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Re: Gt4 turbo clocking
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Wed, 29 September 2004 03:40
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Stuart,
email re-sent
my fault, I didn't downsize photos enough
before
cheers
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Location:
Brisbane
Registered:
February 2003
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Re: Gt4 turbo clocking
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Wed, 06 October 2004 03:52
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i'm not a huge fan of the turbo clock on the GT4. The main reason people want to do it is to eliminate the 180 degree bend off the turbo down to the battery area. Fair enough. Problem is that when you clock the turbo, you still have to do a tight 90 degree turn towards the driver's side to avoid hitting the front engine mount.
Now the pipe is travelling towards the drivers side, and now you have to do a 180 degree turn to get it attached onto the intercooler inlet. Which is precisely what you were trying to avoid in the first place.
And unless your I/C has inlets on the same side, your throttle body to intercooler pipe now has to cross over the cam cover, over the air intake and then down near the battery.... combine this with the pipework on the hot side, and you've got a system with actually more pipelength and just as tight bends.
I'd say do the 180 degree bend straight off the turbo, down past the battery and onto the I/C pipe. On the cold side, go from the throttle body, over the front of the cam cover, then down to the aircon pump area, and onto the cooler.
To me its actually the cleaner route.
The only real reasons I can fathom for the clocking is to hide some of the intercooler piping and reduce the need to muck around near the aircon and water inlets.
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Location:
newcastle
Registered:
April 2004
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Re: Gt4 turbo clocking
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Wed, 06 October 2004 04:47
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| spectral wrote on Wed, 06 October 2004 13:52 |
i'm not a huge fan of the turbo clock on the GT4. The main reason people want to do it is to eliminate the 180 degree bend off the turbo down to the battery area. Fair enough. Problem is that when you clock the turbo, you still have to do a tight 90 degree turn towards the driver's side to avoid hitting the front engine mount.
Now the pipe is travelling towards the drivers side, and now you have to do a 180 degree turn to get it attached onto the intercooler inlet. Which is precisely what you were trying to avoid in the first place.
And unless your I/C has inlets on the same side, your throttle body to intercooler pipe now has to cross over the cam cover, over the air intake and then down near the battery.... combine this with the pipework on the hot side, and you've got a system with actually more pipelength and just as tight bends.
I'd say do the 180 degree bend straight off the turbo, down past the battery and onto the I/C pipe. On the cold side, go from the throttle body, over the front of the cam cover, then down to the aircon pump area, and onto the cooler.
To me its actually the cleaner route.
The only real reasons I can fathom for the clocking is to hide some of the intercooler piping and reduce the need to muck around near the aircon and water inlets.
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when I clocked my turbo I ran my pipe off the turbo to the passenger side ( slim line thermo meant bend was
not as harsh)
and from throttle body down past AC as you said
Yes this way worked better as pipework was kept to a minimum
difference was noticed straight away as interwarmer was gone
and I didn't have the ugly horseshoe bend coming off the turbo
Stu has some pictures for reference
everyone seems to do it diferently 
each to their own
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Location:
Colac, Victoria
Registered:
May 2002
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Re: Gt4 turbo clocking
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Wed, 06 October 2004 08:25
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nods - saw the pics and using the slimline thermo as well -
looking at this stage to do a 2 inch 45ish off the turbo as there will be room , then a more diagnal rout to the drivers side then an increase to 2.5" 90 straight 90 to the cooler . from cooler its all 2.5" 90 straight up-90 past where the battery was , then 90-45 into a long straight to a 45-intake which at this stage will have to be reduced back to suit the intake rubber ( though i plan to increase this up to all 2.5 when money permits )
Reasoning -
less ugly pipes over the motor
piping from turbo will pass all hot/hotter things before it gets to the cooler , like dump pipe radiator core etc .
there may be more piping but the " look " will be neater and in theory dso far its a heap less obstructive than having to run past the dump pipe / aircon setup to the intake .
ive tried 2 jigs so far in 2 and 2.5 inch piping - and 2.5 inch piping fouls EVERYWHERE if i run past the dump pipe to the intake
2.5 inch piping doesnt foul once if i run from the battery side on the path to the intake.
Ive also planned turbo clocking as a hindsight to my larger turbo UPGRADE - as this will sit further across and give even more clearance again once the adaptor plate + custom dump pipe is made up
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