gear ratios and top speed?
01-24-2007, 04:05 PM
#6
Join Date: Dec 2006
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Posts: 45
RE: gear ratios and top speed?
I can reach top speed on the backstretch ofMosport Int'l Raceway (road course). With my stock 19885.0L engine (C4 auto trans) I was hitting 215 to 220km/h before it wouldstop pulling and I'd maintain this speed for the last few hundred metres before the braking zone (with the engine revs just at the redline - a blown motor does me no favours). I've switched the gears to 3.55sand it is now considerably slower -around 190 to 195km/h at the same engine rpm.With the higher gear ratio the engine gets into the redline sooner at a lower overall speed.
01-24-2007, 11:52 PM
#8
5th Gear Member
Join Date: Jun 2006
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Posts: 4,089
RE: gear ratios and top speed?
With an OD tranny, you can likely obtain a higher top speed with a 4.10 than a 3.00 gear ratio. The engine will have an easier time overcoming the aerodynamics and gearing torque division with the higher rpm.
For a non-OD tranny, you'll reach a top speed limit much quicker.
For a non-OD tranny, you'll reach a top speed limit much quicker.
01-25-2007, 11:18 AM
#9
Thread Starter
Join Date: Jan 2007
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Posts: 39
RE: gear ratios and top speed?
ORIGINAL: Not4you
I can reach top speed on the backstretch ofMosport Int'l Raceway (road course). With my stock 19885.0L engine (C4 auto trans) I was hitting 215 to 220km/h before it wouldstop pulling and I'd maintain this speed for the last few hundred metres before the braking zone (with the engine revs just at the redline - a blown motor does me no favours). I've switched the gears to 3.55sand it is now considerably slower -around 190 to 195km/h at the same engine rpm.With the higher gear ratio the engine gets into the redline sooner at a lower overall speed.
I can reach top speed on the backstretch ofMosport Int'l Raceway (road course). With my stock 19885.0L engine (C4 auto trans) I was hitting 215 to 220km/h before it wouldstop pulling and I'd maintain this speed for the last few hundred metres before the braking zone (with the engine revs just at the redline - a blown motor does me no favours). I've switched the gears to 3.55sand it is now considerably slower -around 190 to 195km/h at the same engine rpm.With the higher gear ratio the engine gets into the redline sooner at a lower overall speed.
thanks
joel