Tom H has been coming to Z Car Garage with his Salt Flat Crew for many years. We helped tune their early Studebaker and Sprint cars that went on to make several record passes.
Tom has owned this Cobra since 2000 and he replaced the small block with a 427 fed by four Weber carbs. For the last two years he was fighting driveability issues. Rob found the transition between the pilot circuit and main circuit had a big hole in it and the car would fall flat on its face under wide-open-throttle, eventually catching up with itself.
After ~20minutes on the dyno Rob turned a stumbling car into a totally driveable beast making 404hp and 480 tq to the wheels!
Phillip V is a Z Car Garage customer and former 350z/current 370z owner. We installed an Injen exhaust system on his 350z and he absolutely loved it so naturally he wanted one for his 370z. We didn’t sell these exhaust systems for the Z34 and this was our very first install. Here is a before/after:
More exhaust details:
Rear end view of the exhaust tips:
On the intake side we added JWT dual Pop chargers:
Dyno Tuning
To maximize gains from the bolt-ons we UPREV tuned the Z. We started with 284hp/235tq and the JWT POP chargers made a significant increase up to 294hp/241tq:
The Injen exhaust was good for ~4hp/3tq for a total of 298hp/244tq:
UPREV tuning yielded even more power for a final output of 311hp/258tq to the wheels, gains of 27hp/23tq to the wheels:
