JMS custom chips

[1995MGTS]

I started off with a JMS chip. I ordered it because I didn't know when I would be able to go to a dyno after the installation of the supercharger. I am not knocking JMS, because I truly believe they did the best job they could with a mail order chip. Anyway, my first run with their program resulted in 344rwhp/361rwtq. I then had their chip reburned on the dyno and my best number was 391rwhp/377rwtq, as in my sig. My car ran like crap with the JMS chip. It backfired, spit out black smoke, and bucked consistently. After my dyno, all my problems went away. Just my .02

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FMS/Powerdyne 6psi SC, 73mm maf, 65mm TB, Cobra u/l intake, 24lb inj, 1.7" rockers, GT-40Y aluminum heads, Steeda #19 cam, MAC 1 5/8" long-tubes, MAC 2 1/2" pro-chamber, Dynomax Super Turbo mufflers, MAC 2 1/2" chromed exhaust, BBK 255lph fuel pump, FMS aluminum drive shaft, FMS 3.55 gears, and custom chip dyno-tuned by Swanson Performance. 391.0rwhp/377.5 rwtq SAE corrected