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JBL930 JBL930 is offline
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Join Date: May 2006
Location: UK
Posts: 1,172
Quote:
Originally Posted by EmptyGarage View Post
Has anybody got charts that show the maximum acceleration shift points for stock 930? Is it simply the REDLINE?
For a 930 with a 4 speed box and stock 16" wheels the best way to do a 60-130 run, after you have let your data logger calibrate, is to crawl along in 2nd gear at about 30mph then punch your foot to the floor up to near the red line, then change to 3rd and hold it to the limiter, this will net around/under 133mph.

This is a run with a stock 4 speed and stock wheels, the change from 2nd to 3rd is a round 6800rpm, so roughly 88mph in 2nd and a top speed in 3rd of just under 133mph




This is a recent run, still with the stock 4 speed, but with Ruf speedlines and 285/40/17's. Notice a top speed in 2nd at around the same rpm of about 95mph. I backed off way before the limiter in 3rd as i knew i'd hit 130mph already




I'll be back at the airfield in the next couple of months, with the G50/50 installed, and will get some data from 0-300kph. I'll make sure i change gear at the same 6800rpm point if possible, and post a graph.
The last time i did a 300kph run i didn't start from stand still, and i didn't go hard through the gears as i was just looking for what the car would do flat out, so the times are pretty useless, but here's the data anyway, with G's over laid





If you have a dyno chart with flywheel torque, you can input the data into this calculator, it'll give you pretty accurate info http://vlsicad.ucsd.edu/~sharma/Potpourri/perf_est.html
With my old tire sizes and stock gearing it gave me a max of 186mph at 7000rpm, i actually managed 187.4mph. And a 60-120mph of 6.0secs and i actually did it in 6.01. Pretty bloody close right!
With the new wheels and tires, and new G50/50, my top speed at 7000rpm is 208mph (with the 4 speed and these tires 205mph). I don't have the power for over 200mph i don't think, but should punch into the 190's
Will post the graphs when i have them
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Jonathan.
87 930, 993 turbo engine, RS Tuning 520PS/515lbf-ft, Arrow Rods, ARP hardware, Solid lifters, G50-50, RS Flywheel, 890nm Sachs clutch, RSR coil overs all round, 993 C4 calipers front, 930 fronts on the rear, Ruf Speedlines.....
Old 540 BMW, XB12S Modified, for being a total hooligan
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