View Single Post
Old 04-30-2008, 03:28 AM   #1
edevlin
Registered User
 
edevlin's Avatar
 
Join Date: Jul 2006
Location: Virginia
Posts: 916
Speed at Redline in Fifth Gear?

Has anyone under safe conditions approached redline in fifth gear in a base Boxster with 5-speed manual transmission? A recent dyno run got me thinking about actual top speed of our cars. Are the 2.7L cars limited by gearing and redline limiter or power available in order to be able to reach maximum speed in fifth gear.

At 7K redline I am going about 103 mph in third gear. I have never driven to the redline in fourth gear on the road, but on the dyno, the limiter cuts in just over 7K at 138 mph.

Any thoughts about gearing and power of the 2.7L engine pushing toward redline in fifth gear. I would sure like to find a track, salt flat or someplace to see where the cross-sectional profile and wind resistance of our cars runs into the power output and rpm limiter at our top speed.

Ed

:dance:
__________________
My Car Webpage

2000 2.7L Boxster 102K; TTP intake, headers, high-flow cats; Dansk high-flow muffler; Autothority ECU chip; TechnoTorque 2; Bilstein coilovers; Racing Dynamics strut brace; stress-bar suspension kit; Aasco lightweight flywheel, B&M short shiftkit; 18" wheels; spare tire delete; OEM GT3 seats; JL audio speakers and subwoofer; Alpine PDX-5/PDX-2 amps; Kenwood DNX8120 CD/DVD/Nav; litronics, deambered
edevlin is offline   Reply With Quote