A link to me (R/TErnie) trying to explain how a shorter geared tranny is better than a longer geared tranny for turbo applications. needless to say it didn't work. I used some of the info(verbatim) from here to try and convince them, but they kept saying no. Go a head and vent your frustration on them if you want...I cant take it anymore. BTW I side with the Honda crowd. Also may I add that you guys in general know more **** than Id hope to know. Honda-tech

http://www.neons.org/forums/vi...21514

 

I guess I go against the grain then, because I believe the longer geared LS tranny is better suited to boost because you get to stay in the powerband longer, and spend less time shifting.

Remember, for the 1/2 - 1 second it takes you to shift, you're slowing down.

Also, remember that the turbo has the power to grind through the gears with little effort, unlike a all motor car that may strugle with the long gears of an LS tranny.

Lastly, the LS tranny has a higher top speed in each gear past 2nd over the GSR/SIR/ITR tranny's assuming you are using the same boosted engine.

Oops, I forgot to mention that just getting a shorter geared tranny doesn't mean you are staying in your powerband properly.

For instance, let's establish a few points on a test car.

Redline is 8000
Peak torque comes in at 4800
Peak HP comes in at 7600

If you have a short geared tranny, let's say each shift is a drop of 20% in RPM.

So, if you shift at 8000, you land at 6400. Not exactly where you want to be if your peak torque is 1600 RPM lower than your shift point.

If you have a long geared tranny, let's say each shift is a drop of 30% in RPM

So if you shift at 8000, you will land at 5600, this is only 800 RPM off your peak torque numbers.

Of course, this is just a test. There are ways to calculate max speed and rpm drop of a tranny if you know all the gear numbers, the FD, and your tire rolling diameter.

Remember, Torque wins races, HP sells cars. Be a winner!!!

 

there is a thread that beat this to the ground. I feel that it is different for the neon because of the strong even torque curve...but I will stop there.

 

I agree that a longer gearing will help stay in boost. But as pointed out... it depends on your powerband.

shorter gearing has you shifting sooner and often... but what are we talking about here... straight dragging, autox or overall driving ?

X2