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We get numerous requests or engine swaps, mostly using the readily available engine or 1/2 cut packages imported from japan by various specialists. Having performed a large number of these, we thought it would be worthwhile relating a few problems that have to be solved.
The most common conversion request is the Gen3 3SG or 3SGTE into earlier model MR2 , GT4 or Celica. Whilst they look similar to earlier models, and will physically bolt in, all of the 3SG family engines after Oct 93 (identified by oil filter on the sump) require considerable effort to get all the electrics working as they should and look like factory fitments. The biggest advantages of the post 93 engines is they don't use the bulky flap type air flow meter which frees up room in the bay, and they have a better sump system with improved surge control. Of course, the later BEAMS (NA) engines also are the most powerful due to their VVT and better inlet manifold design and the Altessa engine changes to coil-on-plug which is great if you want to increase the boost.
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