Lost AGAIN!

1995MGTS · 07-27-2001, 02:36 PM

One thing to remember about ours cars is the computer sucks. Even after you install your intake and heads, the car may not run good. It may even run a bit worse, like mine did, after I installed my GT-40Y heads. Your car will need tuning, be it a dyno-tune with custom chip or some other custom tuning device. My car stuttered and hesitated during acceleration on a regular basis. Unfortunetly I never had the car dyno-tuned in its naturally aspirated form so I can't say what my numbers were. However, if you check the readers rides on this site and look under 94-98 conv., a guy by the name of fweathers has an excellent write-up on his GT-40 set-up and his gains from his dyno-tune/custom chip. He went from like 255/290 to 270/305 at the wheels with his tune. I really recommend it, very good info and reading. Good luck.

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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

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07-27-2001, 02:36 PM	#1
1995MGTS Registered Member Join Date: Mar 2001 Location: Chesapeake, VA USA Posts: 69	One thing to remember about ours cars is the computer sucks. Even after you install your intake and heads, the car may not run good. It may even run a bit worse, like mine did, after I installed my GT-40Y heads. Your car will need tuning, be it a dyno-tune with custom chip or some other custom tuning device. My car stuttered and hesitated during acceleration on a regular basis. Unfortunetly I never had the car dyno-tuned in its naturally aspirated form so I can't say what my numbers were. However, if you check the readers rides on this site and look under 94-98 conv., a guy by the name of fweathers has an excellent write-up on his GT-40 set-up and his gains from his dyno-tune/custom chip. He went from like 255/290 to 270/305 at the wheels with his tune. I really recommend it, very good info and reading. Good luck. ------------------ 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