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18g Turbo


slarti

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Guest DougK

Eric,

Would sourcing a 740 turbo, machining it and getting a 18G turbine cost less than getting a 18T? If not it would be a fun project but not a cost effective one.

I heard that the G turbos are ball bearing turbos and the T turbos were not.

the 740 turbos are smaller than a 15g. They are 13c's.

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Guest DougK

I was thinking the same thing but wasnt sure enough to question the thought.

So, I'm back to the adapter plate or different turbo.

I dont know why your so set on the 18g. Find an 18T with the correct flange and save yourself the cost of the maching the manifold and the adapter plate.

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I dont know why your so set on the 18g. Find an 18T with the correct flange and save yourself the cost of the maching the manifold and the adapter plate.

unless your getting forged internals, i agree with doug, no point in getting a turbo that can support 400+ hp when your motor can't handle it

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the 740 turbos are smaller than a 15g. They are 13c's.

Not the 13C, the 12B. You machine the 12B turbine housing to work with the 18G turbine wheel, because the 12B is the only TD05 with Volvo turbine inlet flange.

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Guest DougK

Not the 13C, the 12B.  You machine the 12B turbine housing to work with the 18G turbine wheel, because the 12B is the only TD05 with Volvo turbine inlet flange.

I see where your going with that. The 12b's are hard to find though aren't they? The improvement on the exhaust side would be intresting.

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I see where your going with that. The 12b's are hard to find though aren't they? The improvement on the exhaust side would be intresting.

i don't think there would be an improvement on the 12b exhaust side, its still 6cm^2 just like all the other volvo turbo (15G,16T,18T,19T), you might as well get a 15G and machine the turbine housing ;)

its a good idea Eric, thinking TD05 bigger housing, but the 12b still small and stinks <_<

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i don't think there would be an improvement on the 12b exhaust side, its still 6cm^2 just like all the other volvo turbo (15G,16T,18T,19T), you might as well get a 15G and machine the turbine housing ;)

its a good idea Eric, thinking TD05 bigger housing, but the 12b still small and stinks <_<

Well, the housing is small, sure. But you'd be moving to a much bigger and more efficient wheel... You'd probably get reasonable spool time though a bit slower than the 12B, and a little high end choking but not nearly as much as the 12B. The main limitation as I see it would be the very small outlet (~2.5").

I think you'd get a noticeably better turbine side than the 15G, and a *much* better compressor side (well, I think we know that :P ).

It would be interesting to see :)

I personally think it would be very worthwhile, but it's just not something I think anyone could prove for certain without trying it.

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