1987 Toyota MR2 - Tech Support

We know how difficult it can be to work on cars; believe us, we’ve had more than our share of problems over the years, too. Good thing we’re willing to share this knowledge of problem solving with you and act like we know something technical about cars. Feel free to ask us about any of your tech problems by writing to Super Street at tech@superstreetonline.com or Super Street, Attn: Tech Support, 831 S. Douglas St., El Segundo, CA 90245. We’ll try out best to answer your questions but can’t answer every one we receive personally or in print, so if your issue is urgent, we highly recommend you seeking the help of a nearby mechanic! Also, try to do some basic research online; while the Internet and forums aren’t all foolproof, it is a very good start as there are many excellent resources to look at. If it helps to include a few photos to describe/illustrate your problem/project, please do so.

They Call Me Mister Fast

Q I recently purchased a naturally aspirated ‘87 MK1 MR2; they seem to be rare and not very popular in the street scene. My main concern is: where should I begin with the build? I’ve owned several Hondas but I really want to make my MR2 stand out and perform well power-wise. I love the magazine; keep up the good work!
Bobby Gordon
Fairmont, WV

A Whenever you take on a used car for a project, one of the first things we always recommend is a thorough inspection of the car so that you’re aware of what condition it’s in and how well it was maintained. Always make sure that everything is in good working order; check to see that all fluids are clean and at proper levels (and change as needed); and inspect the brakes and suspension to see if the car needs a tune-up or any repair work. This will also help you determine which direction you should go to for your mods. If your brakes are shot, you shouldn’t be looking at a new muffler first; or if your car is idling funny then that needs to be fixed before you look for wheels. Once you assess the condition of your car, then that will help you find that route for your modifications.

Switch ECUs or No?

Q I have a ‘78 Toyota Celica and doing the swap from a 20R to a 22RE. I used the 22RTE rebuild kit, using the 22RTE turbo and manifold, but I’m having trouble with the ECU. I’m not sure if the stock ECU from the 22RE can be used with the 22RTE turbo? I heard I might have to use MegaSquirt but before I go and buy an expensive aftermarket ECU, can you tell me if I can just use the stock 22RE ECU? Or, if there’s a less expensive option—I’m open to suggestions!
Peter Velasquez
Via e-mail

A It is highly recommended that you use the turbo ECU if you are trying to do a turbo conversion. Reason being: how does the car know to give more fuel and adjust timing in the correct circumstances if the ECU you use is from the normally-aspirated (non-turbo) model? It would “think” your car is non-turbo. If you are doing any other upgrades to the turbo conversion like intake, downpipe, exhaust, or intercooler, basically anything aftermarket—it is also recommended that you use an aftermarket ECU so that it can be tuned to work in conjunction with the additional modifications. There is no easy way around engine management and it’s very essential as engine tuning is one of the most important factors to making sure your car runs well. It is basically the glue that holds everything together and makes all the parts work in conjunction with each other.