Some sleuthing revealed THIS

I've got a nice fuzzy feeling that the RX7's do have carbon seals.

The turbos are both Hitachi HT-12's. One has a 51mm 9 blade compressor and the other a 57mm 10 blade compressor wheel.

I can't seem to find any datasheets though but I reckon these might be worth a play, especially since we're talking low cost here.

Sigma turbo's have the carbon seal standard, it's the set up I use. P.S sorry about the faces, my boy is 'helping' me!

I'm pretty sure 120fly said the front turbo from the twinturbo rotor was the one to use... I cant remember exactly what or why

I haven't looked at them for a while but I think on one turbo the wastegate flapper is on the manifold rather than integral to the turbo.

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yeh I think that was the reason

Could somebody explain how actually the after turbo throttle body functions in a suck through setup? I understand that the basic idea is to prevent the vacuum going in the charger and sucking out the oil. How is the engine running when the throttle is closed?

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Just think of it like when your foot is off the gas on any car, they still idle.

Right Though 'normally' the plate in the first throat is little bit open so the vacuum gets there.

I just don't get that how the vacuum does not get into the charger and simultaneously there is gasoline accessing the engine. Is there some sort of bypass for idle? So the gasoline will bypass the turbo when gas pedal is being lifted and throttle body after turbo is closing and stopping the vacuum... Perharps I am missing some basics of suck through turbo setups... But please do excuse my stupid questions and ignorance

that throttle body after turbo idea is not very convincing to me either.... it cant work

stay away from 32/36s in blow through setup (unless its a HKS one of course)

cheap = unreliable

you need to lock electronic dizzy just the same as points (done it)

injection = much much better

the throttle body after the turbo works, had that stup on my brothers celica when we were first getting it going, couldnt be bothered removing the original carby so just disconnected the fuel to it

there would still be vaccum, just not a hell of alot