Twin Turbo Kit ?

[SalM]

Originally Posted by glorydays

Other than the cool factor, even I can't see the point. Twin charged makes sense but not twin turbo

Optimistically minimal lag out of twins compared to a single, but the kinks can always be worked out.

[DriftEm]

Subaru used to have a twin turbo setup in their JDM SUBARU EJ20 BOXER LEGACY B4

http://www.jdmracingmotors.com/engin..._EJ208_TY754VB

[D K]

The reason why its more difficult on a boxer engine is the engine pulses.

You would have to run the 2 fronts together and the 2 rears.
This makes it a very complicated exhaust setup.

[cdrazic93]

Originally Posted by raven1231

Twin turbos are always faster than single

Cant tell if serious or...

[JackSmiley]

LOL

[raven1231]

Originally Posted by cdrazic93

Cant tell if serious or...

Bro when it comes to laying down rubber I don't kid.... Live my life one fourth mile at a time

[D K]

The REAL way to do it would be a sequential...

[Reaper]

You couldn't put big enough tires on this car to ever need a sequential.

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[Poodles]

Originally Posted by carlitosway6891

IMO the only way a twin turbo setup would work because of the low displacement setup we have is if it was a compounded system like say a factory toyota supra setup or something where you have one small turbo for quick low end spool and then switch over to a bigger turbo for high RPM boost through switching valves...

but then you have the added weight and cost of running two turbos...im sure if sized right for your goal and needs, you could get great spool and power....with this cars high compression and direct injection features, lag with a bigger turbo is not as bad as ppl think it is. im running a gt3582r turbo and you can hear mine start spooling as low as 2800RPM and full song by 3200RPM then i still have over 4k RPM to play with. this motor loves to push big turbos for sure

You're confusing compound with sequential. Also, both turbos on the Supra are the same size.

Originally Posted by SalM

Optimistically minimal lag out of twins compared to a single, but the kinks can always be worked out.

Possibly, but with modern turbo technology, it's pointless (better impeller and housing designs + ball bearing turboes = no lag)

Originally Posted by Reaper

You couldn't put big enough tires on this car to ever need a sequential.

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You can fit tires and wheels as big as the stock setup on the MKIV Supra Turbo... So yeah, not an issue.

[cdrazic93]

As stated before, the high compression motor allows for larger turbos to spool rather quickly. The need for a sequential is when a larger turbo doesnt spool until the end of an rpm band, which is then aided by a smaller turbo to spool faster. Which is not needed in this case.

If someone were to build an 8:1 or 7:1 motor the a small TD05 turbo and a GTX35 or something would be a nice combo with high hp applications.

That market would bo so limited to a very select number of people looking to spend 10k at a minimum on just a TT kit wouldnt be worth producing the cost IMO.

[Reaper]

And I'm lighter than a TT supra and make more tq with only one turbo. So why again?

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[Reaper]

Crawford made 475tq with one twin scroll turbo and their driver said it was uncontrollable on the track. They ended up spending most of their time trying to tone it down.

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[carlitosway6891]

Originally Posted by Poodles

You're confusing compound with sequential. Also, both turbos on the Supra are the same size.

Thanks for the correction on sequential vs compound, my mistake but also to clarify, both turbos on a stock supra are different sizes, well, maybe depending on generation....I'm referring to the mk4

52mm/44mm (inducer/exducer)
58mm/39mm (inducer/exducer)

[Sellout]

Originally Posted by carlitosway6891

Thanks for the correction on sequential vs compound, my mistake but also to clarify, both turbos on a stock supra are different sizes, well, maybe depending on generation....I'm referring to the mk4

52mm/44mm (inducer/exducer)
58mm/39mm (inducer/exducer)

I've seen it claimed both ways, actually. I've never been able (never cared really) to get to the bottom of which models had which set of turbos, but it seems both Toyota and Mazda at different times used different turbos in some and identical turbos in some of their sequential set ups. Hashed that out about 10 years ago on the Supraforums...

Also: those measurements you listed are the measurements for the compressor and turbine wheels in the export spec (non-jdm) Supra, not two different turbos, just the two wheels in the CT12B turbo.

The vast majority of them have identical turbos, I've never actually seen one that didn't have identical turbos, only seen somebody's evidence that they existed way back then...