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Can you convert a gt neo gearbox to a gtt gearbox


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Hi guys

have done some serious work to my engine atm:

2.9L stoker kit

Neo ultimate head

Tomei 260 camshafts 

Yellow jacket coil pack

otaku garage forward facing intake plenuim with a 90mm throttle body

and I’m not even on my L plates yet

thats why I’m doing all this work so when I get my p’s I can do an actual gtt turbo not a plus t setup

so if anyone has suggestions on what I’m doing and what I could do better please let me know 

but back to my main question 

can you convert the internals of a gt gearbox to a gtt

ive heard there the same just internally different but want to be sure

and should I be upgrading diff and drive shaft

thanks jack

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No. The NA gearbox is physically much smaller. Like half the size.

You don't need to upgrade either the diff or driveshafts. Not for strength reasons anyway, as the diff is the same strength as the turbo item and the axles are nearly as good. But.....you will want an LSD centre on a turbo.

Note that I said driveshafts. You said driveshaft, and it is not clear whether you meant the tailshaft or the axles. Not that it matters, as both are strong enough.

It's also not clear what the stroker kit and other parts are fitted to. The NA engine? A turbo engine in the shed? If you've done it to the NA, complete waste of time. If you've done it to the turbo, well, the yellowjackets are not a good choice, but beyond that, everything else is OK, if largely a waste of money.

You will need brakes. And, are you sure that you will be allowed to drive a turbo on your P's?

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49 minutes ago, Jacks red r34 gtt said:

Hi guys

have done some serious work to my engine atm:

Yellow jacket coil pack

otaku garage forward facing intake plenuim with a 90mm throttle body

 

perfect example of why not to fit that style of plenum. lost 1000rpm of response and a bucket load of power. Green is factory plenum, the others are a short runner style plenum. Bin the yellow jacket coils and get a PRP r35 coil kit.

IMG_20191210_110548.thumb.jpg.0992b12b5b24dc9dfd1ed6f4e5c3daad.jpg

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13 minutes ago, Jacks red r34 gtt said:

Ok thanks

just wish the stock didn’t go over the valve covers

looks ugly and is really inconvenient when working on your engine 

and do r35 coils stick out of cover?

It's really not hard at all to remove the crossover pipe as required, which is not often.

Get split fires if you want it to all fit factory. You will have trouble with yellow jackets

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19 minutes ago, robbo_rb180 said:

perfect example of why not to fit that style of plenum. lost 1000rpm of response and a bucket load of power. Green is factory plenum, the others are a short runner style plenum. Bin the yellow jacket coils and get a PRP r35 coil kit.

IMG_20191210_110548.thumb.jpg.0992b12b5b24dc9dfd1ed6f4e5c3daad.jpg

But look at the peak gain! And how much cleaner the engine bay looks.

 

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17 minutes ago, Jacks red r34 gtt said:

Btw could you link the coil kit

cant find it

http://letmegooglethat.com/?q=Prp+Rb+coil+kit

2 minutes ago, Ben C34 said:

But look at the peak gain! And how much cleaner the engine bay looks.

 

I don't like the look of most of those plenums and fitting the new plazmaman ones with engine in is a pain with the water hose/pipe underneath. 

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1 hour ago, Jacks red r34 gtt said:

and the n/a block is exactly the same as the turbo

No its NOT mate, no piston oilers for a start, and past experience of these blocks found that the turbo oil supply gallery has not been drilled either, or the turbo oil drain hole as well.

Edited by Rusty Nuts
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