[pwpanas]

Originally Posted by sausa

Thanks, so i can make it a single turbo, but a twin one ?
It is possible ?

1. Yes, it IS possible, but it would be VERY difficult. It would also be much, much more expensive than a single turbo...unless you know how to weld and you're willing to put a LOT of your own time into the project (I'd estimate 200 hours+++). For example, that HKS Twin Turbo kit you mentioned will NOT fit or bolt up to the non-turbo Mkiv Supra cylinder head...not even close. In other words, for a twin turbo on a non-turbo Mkiv Supra, the entire turbocharging system would have to be completely custom-fabricated (in addition to changes to the engine, to deal with the higher compression ratio of the 2jz-ge).
2. Why do you think you want to have a twin turbo? The ONLY advantage to a twin turbo for an inline-6 engine is if you can have the two turbos operate sequentially (as they do with the oem setup). All aftermarket twin turbo kits (including the HKS twin turbo kit you mentioned) do not operate sequentially, and therefore perform almost identically to a large single turbo.
3. For the same reason that the HKS Twin turbo kit would not fit, you also can not install the Mkiv Supra Turbo's oem (sequential) twin turbos (from the 2jz-gte) onto the Mkiv Supra non-turbo engine (2jz-ge), because (again) the cylinder head is a very different configuration (when compared with the turbo Mkiv Supra engine).
4. Your easiest and most cost-effective alternative is to go with one of the many plug-and-play / bolt-on single turbo kits for the non-turbo Mkiv Supra...such as this one:
   http://www.boostlogic.com/parts/supr...oKitStage2.htm
5. Lastly, note that if you do turbocharge a non-turbo Mkiv Supra, the unfortunate news is that you still won't have anywhere near the overall level of GT sportscar that the Mkiv Supra Turbo is. There are many, many other very significant differences between the two cars, such as the transmissions, the differentials, the ignition system, the entire braking system, etc., etc. In other words, if what you really want is an Mkiv Supra Turbo, then (fow what little my opinion might be worth) I'd strongly suggest you save your $ for a longer period of time, and then purchase the car you really want.

P.S. What did you mean when you said "homologation"? Did you mean the customs & import fees to legally import the car from the UK to France? If so, would these fees be different for an Mkiv Supra Turbo vs. an Mkiv Supra non-turbo?