Building a (functional) rear diffuser has been on my list of things I wanted to do for a while, but getting it to fit nicely around the exhaust was always a problem. My new center exit exhaust solved that, so on to the diffuser build!
A few months ago I posted about a new exhaust that I built for my 2GR swapped MR2. It sounds great, it looks awesome (especially in combination with the rear diffuser that I built around it, write-up on that coming soon), but I very quickly found that it had one major drawback. TERRIBLE drone at about 2500rpm. This wouldn't be a big deal if I never drove my car on the street, but I do, and so something had to be done!
Have you found the electronic throttle on your 2GR swapped MR2 to be a little too sensitive? It turns out, there is a reason for that, and also a $15 solution!
For a while now I have been wanting to build a new muffler section for my car, mostly to replace the 27lb Berk Technology muffler with something a bit lighter weight. From there the project evolved into a low profile, center exit design to better accommodate a rear diffuser that I would like to build some day. Having something unique is of course a plus as well.
While building a set of my custom coilover housings recently, I thought that maybe people would like to see what the process of taking these from a pile of parts to a finished set of housings looks like. So here we go!
Toyota rates the 2GR at 269hp (at the flywheel), give or take a bit depending on the application. My swapped MR2 dyno'd 280hp (at the wheels). Assuming 17% drive train loss, that's 337hp at the flywheel, or a gain of 68hp vs stock and a specific output of 96hp per liter. Not bad for a stock motor with intake / headers / exhaust, but that doesn't mean there isn't room for improvement!