This was an interesting job I did a few years ago that I thought I’d share. I met a guy who had just acquired an AW11 Toyota MR2 that already had a turbo conversion. He planned to use it for rally racing and wanted to upgrade the existing turbo to a larger unit. The problem he faced was that the existing turbo had a T3 inlet flange and the larger turbo he already had used a T4 inlet profile.
No problem I thought so I got to work measuring both parts and creating an adapter plate to fit them together. It was a relatively straight-forward job and to evaluate the fit I offered to 3D print a test part before commiting to a more expensive stainless steel item. I’m happy to report that it fit perfectly first time.
Unfortunately I wasn’t able to get any pictures of the finished stainless part or the car itself… I have heard on the grapevine that he has the car up and racing now. I’m sure he’s a talented driver but I’m not sure it’s what I’d want to be driving as a rally car with the MR2’s reputation for snap oversteer… Good luck though mate!
A custom exhaust manifold for the 4AGE engine with a T3 turbo flange.
(Not the customer’s car!)
Picture courtesy of Manon Racing Products. https://www.mrpltd.co.nz/product/4age-turbo-aw11-manifold/
Gallery - Toyota MR2 Turbo Adapter
