17prospective buyer

Just a cool little thought i have had for a while when thinking about space constraints with the 928 motor, i dream alot about doing all these crazy things to my car.

Then i realized it had actually been done in real life in a few motors, first one i noticed is when i had to work on a Duramax 6.6, i thought it was just so cool that the turbo was in the middle of the V. It was a "why didn't i think of that" kind of thing.

Then of course i realized you'd have to reverse the intake and exhaust flow to simplify the turbo manifold routing or else it wouldn't be worth the trouble to make a turbo manifold for it.

Anyone else think about putting a turbo in the middle of our V8's before?? I know it would be a lot of work, but probably no more work than any other conventional method of turboing a 928 motor.

Hell, maybe you could even reuse the "spider" intake runners to make the intake manifold (which would now attach to what was the exhaust ports).

depami

Do you mean in the valley?

What would you do with the exhaust, stack up through the hood?

ptuomov

Go and take a look at the BMW V8 in your nearby showroom.

BC

You turn around the heads, and go down behind the engine to the normal exhaust workflow. The issue is cams, head castings, and space for the exhaust. Packaging this, you may as well do it Todd's way or buy a damn turbo car.

17prospective buyer

The Mercedes Bluetec V6 uses it too.

Depami; Good point, everyone here will chime in on the difficulties and engineering challenges and bring me back to reality. Heat would be a huge problem too, you would REALLY need those oil coolers after that.

Lizard928

The amount of changes needed to do this would be insane.
Think new heads insane.

TexasDude74

Diesels can do it because they don't need a intake manifold. Therefore, the valley is just wasted space. So why not put the turbo there? Gas engines need an intake and plenum and don't like heat in them either. So it would require some serious engineering. If you want to go down that path, a duramax will fit in a 928 engine compartment. My God, I can't imagine the communities reaction to an oil burning shark!

jheis

Yeah, just design new heads, cams and all the ancillaries with the flow reversed - piece of cake....

IcemanG17

This is popular in many of the turbo V engines found today....basically reverse flow to what our engines do....possible....YES....insanely expensive..HELL YES.....

Honestly you can accomplish the same thing with a roots-twinscrew style supercharger....sits right in the area you are talking about....take a look at the 928gt kits

Roy928tt

Hang on guys, Think about this one.

The heads can be bolted on in the required manner ( and getting the cam boxes off will be easier)

The cams are going to have to remain on their original bank to have the correct length. Ditto the distributor.

Timing belt path will change a bit, possibly not a big issue. I think length will change but that is no big deal.

No, guys, it is a wild and crazy concept but on a 16 valve I don't see it as being so impossible.

Imo000

The aluminum spider will have a very short life as an exhaust manifold.

9x8

You will also have to turn pistons 180 degrees and (most importantly) modify water passages somehow. Way too much work for questionable results. But a very cool project for "Why? Just because I can!" guys.

123quattro

Several diesel engines put the turbo in the V and just run the exhaust right between the heads/firewall to get it up there. You don't have to flip the heads around, but it makes packaging harder.

BMW and Audi turbo gas V8 are also use "hot V" design now. Intake plumbing design/volume is not nearly so important when you jam 15 psi in there.