EvilKyote

Does anyone know if it is possible to modify a scooby engine so it can be a twin turbo? I was thinking a smaller light weight turbo that would spin up ultra quick and give you boost as low as 1800 - 2000 rpm and then your standard turbo to carry on when the little one gets a little tired! Basically like a Supra!

Anyone heard of this being done or if it is possible?


Evil

GavinP

http://www.autospeed.com/A_0882/page1.html

Deep Singh

Most highly modified Supras and Skylines go the other way ie trade two small turbos for one big one!

nom

It's really tricky doing things that way round - why the skylines & supras swap back.
Easiest thing for early spool-up seems to be a small nitrous system.

Deep Singh

You thinking of running some Tom?

rally colin

I have a legacy twin turbo engine for sale less the turbos £500

nom

Heh.
Not yet!

kurt

Colin I'm looking in the possibility to covered my GT turbo euro spec in to a twin turbo set up and I might be interested in your twin turbo engine if can get my answer on the following Questions are the internals of the engine better than the ones in my standard engine (218 bhp gt turbo impreza old shape MY00) this being a 280 power plant
And is it possible to keep my on engine in the car and change the parts that need to be change to make the twin turbo conversion (inlet and outlet manifold and maybe the injectors because they are 480 cc in stet of 440cc in my car) or do I have to change something else?
Do I have to change something to the electronics of the car except of course a descent remap of the ECU

DuncanG

EvilKyote/Kurt, I have a Legacy GT (MY97)twin-turbo and previously had a MY99(UK) Impreza turbo. IMHO the twin-turbo setup is a lot more trouble than its worth.

When it works right it is nice to have both a good bottom-end response and a top-end that holds on to 6500+rpm but the down-side is that you have a pretty large hole in the torque delivery at 4000-4500rpm (so-called VOD Valley of Death). You can drive round it but you end up with a narrower usable power-band and not the wider power-band you are probably hoping for.

You'll need lots of parts -
prim + secondary ex manifolds,
exhaust link pipe,
prim + sec up pipes,
prim + sec turbos,
intercooler (2 inputs),
inlet plumbing,
solenoid box with about 20 vacuum hoses,
ecu + harness,
downpipes,
custom centre exhaust,
etc

I don't think you need to change engine but it would be easier to transfer complete engine from a Legacy donor car.

When you've done all that you'll have a car thats (at best) no faster than a lightly tuned single-turbo and you'll have a maintenance / upgrade nightmare!

Don't do it - get a hybrid turbo matched to your requirements if your not satisfied with the TD04/05!


[Edited by DuncanG - 1/4/2003 1:33:44 PM]