Hows My Driving? With Vid

Rpm sounds low on the shift not to mention you shift like my grandmom.... Just being honest.
Now the real question is how did you hold the camera, steer and shift? If you were driving with one knee on the wheel shifting left handed and video taping all at the same time, kudos to you!!!
 
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As far as gears go, guessing from the rpms/mph you were shifting I'm GUESSING you have something like 3:55s. You can jack up your rear end (both wheels up) and rotate your tires one turn and count your drive shaft rotations to get an idea. Sometimes (like on my axle) there is a tag stating what gears are in it. The guy that installed my 3:73's was nice enough to bolt the tag on the diff cover.
 
There's no point guessing where you need to shift until you know where your peak power is. If you peak at 4800 rpm, why go farther?

Where you shift depends on your power curve, but you would rarely want to shift right at peak horsepower. Most time revving past the peak point will still keep you in a power band that makes more horsepower than it would if you shifted to the next gear and lost rpm.

Example: let's say peak power is 300hp at 5500rpms, and a gear change will cost you 2500rpms. You would have to look at your power curve and see where to shift. If you shifted at 5500rpm, then you would need to see what hp you are making at 3000rpms. Now adjust shift point to 6000rpms, and compare the power you are making there to what you would be making at 3000rpm. Where would you gain the most acceleration from spending your time running? Most likely you are makin more hp during the 5500-6000rpm pull then you would be at the 3000-3500rpm pull.

Then again, it all depends on your power curve and gearing.

Joe
 
You may need to adjust your clutch cable. Do you have a firewall adjuster?

Regarding gears, I went from 2:73's to 3:73's. When I had the stock 2:73's I didn't reach 5k rpm till about 35 mph, 2nd gear maxed about 50'ish and so on. I haven't pegged my car with my new gears since when they were getting installed they found that my drivers side torque box was torn so i've taken it easy on my T-top since then.
 
I always shifted a stock Mustang around 5500 rpms. The stock tachs are so bad, it's hard to say. If you want to save your T5, that's a good way to shift. If you want to go fast, you're going to have shift it harder and faster.

Kurt
 
Agree with the other folks.
I would say you are shifting too early on the 1-2 and 2-3 shifts. The motor never sounds like it starts to fall off... the 3-4 shift sound pretty close, but I'd give it another 100-200 and see what happens.
Your shifting was somewhat spirited, but by no means fast. No offense meant, everything takes time a practice.