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Old 09-08-2008, 04:14 PM   #29
JEFF2010SSMANUAL
JEFF2010SSMANUAL
 
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Drives: IOM 2SS/RS LS3
Join Date: Aug 2008
Location: Northern IL
Posts: 1,953
Quote:
Originally Posted by rayhawk View Post
The reason the numbers are not coming out right is that the car won't shift 6 times in the 1/4 (at least I think that is what you meant). Actually, the manual car will shift into second just before 60 (about 55), and the auto shifts into third at 66, which is why the auto runs much better to 60mph. And in the quarter the manual uses third gear through the 1/4 mile (to 114 mph), while the auto shifts into 4th gear at about 102. This is why the auto has a slight edge, it is geared more aggressively for acceleration than the manual. Don't ask me why they did that, I would think you could dedicate 4 gears to the 1/4 mile run with a 6 speed manual tranny, and still have plenty of room for overdrive, but oh well. They really geared this thing to keep revs low to help fuel economy I suppose.

As for the calculator, the manual car will shift only twice (1-2, 2-3) in the 1/4.

I guess 4.5 auto, 4.8 manual
12.9 auto, 13.0 manual, both at 108 mph



You really think the SS manual will do 13 flat in the 1/4. 1320 feet?

I would dirty my diaper if it did. More like 13.5 IMO. With me driving. Which is a good thing. My first car@17 was a 1971 LT1 Chevelle with an m-22, and I could speed shift like a pro in 2 weeks.
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