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Bad Turbo Fitment

s13_Skyline_inside
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s13_Skyline_inside Proficient

s13_Skyline_inside

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hey guys, its an rb26/30, xtr manifold from gcg, t04z turbo, exaust housing was supplied by gcg, the thing doesnt seat on the manifold properly and the compressor housing fouls on the side of the engine bay, doesnt matter which way i twist it it hits the casing for the captive nut that the top camber arm bolts through.

gotta wait till tonight to load photoshop and shrink the pics so i can upload them

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https://www.sau.com.au/forums/topic/316151-bad-turbo-fitment/
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s13_Skyline_inside Proficient

s13_Skyline_inside

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yeh ill give them a call on monday, but obviously they are not open today :blink: the rb30 30mm taller as you know so mayby it doesnt account for that as it was for an rb26, the exaust housing is a .82 so its not the big one. ill give my exaust place a call to see if they can cut and weld the flange at a different angle, the space between the housing and the valve covers is huge. i bought the manifold of gcg over a year ago so they'll prob just tell me to buy another manifold.

Edited by s13_Skyline_inside
discopotato03 Grand Master

discopotato03

Posted
Posted

Well something to note is that a T04Z is a T4 P trim based turbo meaning it uses a T4 turbine housing and not a Garrett GT30 based one like GT30 and GT35 BB turbos are supposed to have .

The manifold may have been designed for a GT BB turbo , anyway ask GCG because they should know .

A .

GTScotT Grand Master

GTScotT

Posted
Posted

something tells me that turbo and manifold werent a paired combo on production...

cant honestly think of an economical way to fix that other than to swap the manifold or turbo for an alternate option (resell rebuy)

bubba Grand Master

bubba

Posted
Posted
What does 30mm of the block have to do with it?

The head doesn't change position in any other way than upwards.

It's 38mm and it doesnt just push the head straight up, our engines are inclined towards the passenger side of the car so it pushes the head laterally somewhat too.

I had a similar issue with the 6boost manifold and GT35R on my 25/30, had to send it back to Kyle and he moved the turbo flange forward 25mm, that combined with slotting the drivers side engine mount (to tilt the engine up a few degrees) got the turbo to fit.

GTScotT Grand Master

GTScotT

Posted
Posted
do you think it would be an option to get an exaust place to cut and re weld the manifold?

it is an option, however i would consider it a less economical option based on product quality.

personally i would want to have a new manifold made as if you think about it, a slight change will require quite abit of work. shortening or repositioning any of the runners of collector will change the angle at which the pipes need to run at the moment meaning the changes will be fairly major. essentially meaning time consuming and tedious, which results in costly and CAN result in a poorer quality item.

if you arent too concerned about quality etc and just want it on, you can try find somewhere to do it for cheap. otherwise id resell and start over, hope that helps.

s13_Skyline_inside Proficient

s13_Skyline_inside

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makes two of us then, well anyway went to see the guys at castle hill exaust today with pics and they dont think it'll be an issue, the manifold can have the flange cut of and welded on at a different angle, ill chuck some pics up in a few weeks after i get the work done

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