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Originally Posted by drgnframe24
im new here so i figured id post my question and get started. well im looking to get a mkIV supra and kinda want to get a non turbo because of insurance. im 21 so its still kind of expensive. i want to make it twin turbo after. how hard and what am i looking to spend. a rough estimate is good. i know some people that can install and all and im pretty good with cars myself. thanks guys
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To get the engine upgrade only, you're probably looking at about $5K or so for a 100% complete US-spec 2jz-gte (including us-spec wiring harness!) for a Supra (not a jap-spec 2jz-gte from an Aristo!!!), about $500 for an oem tt ecu, and about four or five hours (at least $250) of labor
by a shop extremely familiar with the mkiv supra to do the swap. Alternatively, you could choose a jap-spec aristo 2jz-gte for about $3k, but then you're looking at $1000-$1500 in additional parts to make it work (including a us-spec 2jz-gte harness, possibly oil pan(s), gaskets, etc.), plus about 15 hours (at least $750-$1000) of work, again
by a shop extremely familiar with the mkiv supra.
If you're going to try to do the work yourself and with "some people that can install", you should at least double those estimated hours, and please, please, please do not even begin planning for the job without purchasing a set of Toyota Supra Repair Manuals (TSRMs) for the jza80 from Toyota. When you're doing the work, be sure to torque every single bolt to spec according to the TSRMs ... and if you want to be able to drive this car at its full potential, treat this car like a Ferrari when you're working on it (i.e. not like a Corolla or a Chevy pickup truck)...this isn't just another car.
Lastly, note that there's
MUCH more to the full TT version of the Mkiv Supra than just the engine & turbos. For example, the brakes, transmission, and differential from the non-turbo are
significantly less capable than the TT equivalents. In my opinion, if you want to end up with a FULL TT-spec Supra when you're done, you'll go through less cost and far less trouble if you wait until you can afford 'the real deal' right from the start.