sport, and performance settings. According to Rippie’s catalog, the changes allow the FX-3 system to be used as a tuning tool to maximize the suspension’s performance at both low-speed autocross and high-speed track events. The FX3 is programmable with different chips for different tracks.
Cowgill also upped the ZR1’s stock horsepower with a DRM 500/415 top end kit, which includes a ported plenum and injector housings, K&N air filter, modified air filter lid, 63mm throttle body (from 58), and a custom computer calibration. The neat part for Scott was he didn’t have to send his engine out. He simply ordered the parts and saved money doing the installation himself.
With a set of 4.09 gears replacing the stock 3.45s in the factory Dana 44, Scott’s ZR1 handles good on