This post is a bit overdue because of recent events. I've used J&M Motosports for many years now for exhaust installs and misc other car work. I took my TT there many times, and now I have taken my S2000 to them several times. While they are no S2000 "expert" they have learned from my car, and they are performance car experts and that's what really matters.

They installed my exhaust, my J's racing 4.44 final drive gears, my fuel pressure gauge sensor, supercharger maintenance, dyno runs and VAFC tuning. They can do any work to the differental that you might what. This is the only place I will let touch the rear end of my car. They put tons of Vortech superchargers on Mustangs and other domestics and imports. They are experienced with NOS, AEM EMS(in other cars), turbos, etc. They have 5 lifts, and 1 dynojet in floor dyno.

I've known the owner Mike for almost 10 years now. He doesn't give discounts on labor(EVER!) but he will on parts(but he can't compete with the internet except on superchargers). The labor rate and dyno rate is a bit steep, but these guys are worth every penny. $72.50 an hour labor and $125 an hour dyno with air/fuel.

As the year goes on, they will be installing my new mods like Kaaz differental, Comptech strengthening mod, new injectors and pulley for supercharger and more dyno tuning(AEM EMS). Once done, they should have a pretty good understanding of the ins and outs of the S2000.

Mike is willing to host ANY S2000 events there that we want. Be it sparg plug install, or dyno session or group exhaust install whatever. All we have to do is plan it and confirm a date with him.

Here is the info:
J & M Motorsports
299 BROAD ST, MANCHESTER, CT 06040
(860) 645-6389

Here are the results of my last tuning session with them:



Just to sum it up before I went in for tuning I was running lean and had to run 100 octane. We added 11% fuel in most areas with the VAFC. We also lowered VTEC to 5000rpm and gained 20hp at 5200rpm. With the fuel tuning and VTEC change I gained an average of 10hp from 5000-8300rpm. Plus I don't have to run 100 octane anymore

I did find out that I am maxing out my injectors, so the solution down the road for me is smaller pulley and new belt for the charger(aka more BOOST!), AEM EMS, and 550cc injectors from RC Engineering. All of this will go in at once to minimize tuning costs.