Dave,
Think about this, some cars are horsepower limited at Bonneville, some are
traction limited. It doesnt allways follow that the "right" trans gearing
will get you more acceleration, sometimes it just gets you more wheelspin.
At Bonneville the desireability of a multi speed gear box SEEMS to be
inversely proportional to the amount of torque available. With a high
horsepower car you end up feathering the throttle through the lower gears so
you don't end up ng any faster. There are always tradeoffs, we just have to
pick the right ones for our particular situation
Jim in Palmdale, where it just rained 8 drops.
----- Original Message -----
From: dahlgren <dahlgren@uconect.net>
> So if I understand this right then... If I put my pro stock car in 4th
> and leave the starting line that that at the end of the quarter mile the
> car will go the same speed as if i used all the gears?? When you lose 5
> mph at the quarter does your car go the same speed at the 5 as if you
> were not 5 mph down?? Why do all the 'big' streamliners keep wanting a
> longer course ??? How fast does your car or cars you have messed with go
> ??? I am sure that if I start in any gear that my Pontiac i drive on the
> street will go exactly the same speed at the 5 no matter what gear I
> start in.. but going 125 is not much of a challenge either. How do
> explain away the change of shift points in Keith Turks car making 203 at
> the 3 instead of 197 at the 5???? Doesn't having the correct gearing and
> going as fast as soon as possible make the course appear to be longer
> because you are going faster sooner and have more distance left to get
> the last MPH out of the car??
>
> to quote "We got a 225 record with 183cid 3rd gear only??? Nebulous"
>
> Is this the theory you are using?? Do you think the 225 might of been a
> 245 with all gears working??
>
> well we got a 216 record 219 qualifying with a 91cid gas lakester and
> went 213 at the 1/4... used all 5 gears.. which one is more efficient
> ??? and that was on the first pass.... Do you think if we left in high
> gear that the car would of gone 219 at the 5 on 91 inches ??? What's the
> physics behind your theory??
>
> Oh yeah and the e-mail you quote.. what's that thing doing on the long
> course at 179 if you should be going over 175 at the quarter in the
> first place???
>
> Hate to make this sound like a flame but I really can't figure out the
> logic behind it all.. Help me be smarter and tell me how this is all
> supposed to make sense..
> A very confused engineer..
> Dave Dahlgren
>
>
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