Have a look at the Supra's bare chassis and drivetrain

[mas921]

Looks like the engine block isn't quite behind the front axle line. Shame.

that's what you get with a -long @$$- I6 ,, but at least the engine mounts are quite a bit behind the axle. Not front mid-ship/S2000 for sure though

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[yalpeR]

 

[Pheonix]

Wow so that turbo manifold has only 2 primaries? I though it would be 6 seeing how it's an I6? Never seen a manifold like that before.

 

[Pheonix]

This car would be insane at 2800lbs. Especially as a street car.

2800lbs and you aren't a "street" car any more. We are talking fully stripped interior, fully gutted, passenger seat missing, no AC, no radio, all airbags removed and fully caged up. I think the most common weight reduction mods for a street driven car would be seats, steering wheel, wheels, suspension, full titanium exhaust, and maybe some dry carbon body parts (read very much $$$$), and removal of sound deadening materials. Hopefully we can get close to 3100-3000lbs like that.

 

[Nurburgring]

Wow so that turbo manifold has only 2 primaries? I though it would be 6 seeing how it's an I6? Never seen a manifold like that before.

Manifold is partially integrated in the head itself. Pretty common in latest generation turbo engines from many manufacturers (civic type r, vw gti, toyota ar-series)

 

[Pheonix]

So what if we wanna do a full single turbo build and improve exhaust scavenging? We have to swap out the head for that?

 

[Nurburgring]

For most realistic power goals it probably won’t be necessary. People are doing >600whp on the 1.5 liter Honda engine with integrated manifold (L15B7). We´ll have to see.

 

[kona61]

So what if we wanna do a full single turbo build and improve exhaust scavenging? We have to swap out the head for that?

US B58B30O1 head or last gen B58 head. Although, I believe the last gen B58 has different components so the head won't fit without modification.

 

[Matador]

So what if we wanna do a full single turbo build and improve exhaust scavenging? We have to swap out the head for that?

Absolutely not.

 

[elpadrino]

Hopefully this kills that side intake talk once and for all.

 

[justbake]

I believe it will be even easier to upgrade to a bigger single with this head. Instead of a full manifold being made, you just need to create a T4/Vband 'adapter' that bolts to head similarly to how the turbine housing connects to the head now

 

[AHP]

I believe it will be even easier to upgrade to a bigger single with this head. Instead of a full manifold being made, you just need to create a T4/Vband 'adapter' that bolts to head similarly to how the turbine housing connects to the head now

Huh..? That V-band is only to mate the downpipe/cat to the exhaust housing outlet. Considering the manifold, CHRA, internal WG, etc.. is all one cast component, the path of least resistance for a turbo upgrade will be to machine the OEM housings for bigger compressor and exhaust wheels. Also considering the convoluted wastegate/BOV contraption is all integrated, the aftermarket has several problems to solve for outside of re-wheeling the OEM unit.

 

[justbake]

Huh..? That V-band is only to mate the downpipe/cat to the exhaust housing outlet. Considering the manifold, CHRA, internal WG, etc.. is all one cast component, the path of least resistance for a turbo upgrade will be to machine the OEM housings for bigger compressor and exhaust wheels. Also considering the convoluted wastegate/BOV contraption is all integrated, the aftermarket has several problems to solve for outside of re-wheeling the OEM unit.

Huh? There are many turbos that use Vband inlets for their turbine housings and is becoming more and more popular.

Yeah its a single cast unit but instead of going from head -> turbo, you would go from head -> manifold (I loosely used the term adapter since the manifold is inside the head) -> aftermarket turbo.

As for the wastegate, this is where flashing the DME comes into play as it has already been done with the current b58.

Obviously upgrading the turbo's internals is the easiest but that isn't what we are talking about.

 

[AHP]

I see what you're saying now; I misunderstood your previous post. In that case whether it's V-band or bolted flange doesn't really matter unless space is a big constraint (which could be the case). Then the question is can you cast or fab a head-to-turbo adapter and still have the inlet/outlet land in the same location, for bolt-on simplicity.

 

[kona61]

I see what you're saying now; I misunderstood your previous post. In that case whether it's V-band or bolted flange doesn't really matter unless space is a big constraint (which could be the case). Then the question is can you cast or fab a head-to-turbo adapter and still have the inlet/outlet land in the same location, for bolt-on simplicity.

I am certain it’s possible. The length of the turbo inlet with the adapter thing is quite long which gives plenty of space to create an adjustment.

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