cmac

anyone ever do this? i know lots of people run compound turbos. i saw a jap car with true twin turbos. it was a straight 6 with a split exhaust manifold running two turbos. cant remember what kind of car it was but has anyone done this with a CTD? it would definatley be different!

AH64ID

I am sure it has been done, but the plumbing would be a nightmare, and you probably wouldn't get the performance of the compund setup.

patdaly

Gasser requirements are different, you wouldn't gain the same boost as you would with a compound, yet if you tried a compound on a gasser you would drive over the crank.

Tate

Was it a supra?

Twins double the flow, but the pressure ratios stay the same. Compounds keep the flow the same (of the big turbo), but multiply the pressure ratios. Thats benefecial to low rpm engines like ours.

1-5-3-6-2-4

sounds a lot like batteries in series and parrallel

Andy505

I was just going to say the same thing....

cmac

it wasnt a supra. it was a car that is only sold in Japan, he had it shipped here. it was right hand drive and all.

so it would flow more air but at the same PSI as one of them right? so pardon the ignorance but how would this not be good?

nkennedy

Probably a skyline, or simular Japan only car.

Andy505

I think its an issue of not enough pressure and too much volume. The HX35 was designed to put a max of 35 PSI into an engine with 5-6.5 liters in capacity. It a compound configuration I think it would be fine (being one turbo feeds the other) but in a twin configuration (being both turbo's feed the engine directly) your gonna be putting in 35 psi to a volume of 10-13 liters (volume doubled) but the capacity of your engine is 5.9 liters. So both of your turbos (if you can spin them fast enough) are going to reach their max efficiency pretty quick with each of them not pushing a normal volume of air and your only going to get 35 psi out of them.

Thats my guess anyway.

Chili

maybe it was a Prius.......

cmac

it was a skyline GTR or something like that. definatley a skyline though. ok so basically it would be a waste of time. thanks anyway

patdaly

On a diesel it would be. Most remotely street driven gassers don't see north of 10-12 Lbs of boost. I'm not sure my truck even spools till past that.