[Ryan'stc]

Mostly this is a question for Low, but anybody jump in here if you can help. I was studying manual transmissions the other day and I was trying to figure out how they determine gear ratios. My theory is they dyno an engine and from there calculate the amount of necessary torque needed at different speeds. Am I even close?

 

[doock87]

my .02: they count the number of teeth on one gear and compare it to the gear it's meshing to. as in 3 teeth for every one tooth on a gear.

i'm not 100% sure about the details

 

[lo bux racer]

I don't think that's what Ryan is looking for. Honestly, I have no idea how they determine ratios for street cars. Every gearbox I have owned on a street vehicle has been weird except the Getrag 233 in the Supra. All the rest of them are spaced oddly so that you have terrible gaps between gears that make you fall off the power when you shift, much like the tC transaxle.

It would be interesting to find out how the OEMs decide what ratios to put in a gearbox. I know if I had a choice, the tC box would be completely different.

 

[alas]

supras make me drool soo much. If only they still made them.

 

[basilisk4]

^^^ I hate to say it, but you probably would get yourself killed in a week flat with a Supra.

 

[doock87]

oh, you meant how do they determine the gearing to make use of the power... if only there were a toyco engineer on this forum.

 

[We11Spring]

Actually, I've got a friend working for DCX, I'll ask him and see what he can find out from the enginerds that work with him.

 

[alas]

QUOTE

^^^ I hate to say it, but you probably would get yourself killed in a week flat with a Supra.[/b]

Why would I kill myself? I hate to say it but I think you really are an idiot.

sorry for goin off topic and insulting this guy but i'm tired of his idiotic remarks towards me.

 

[uberingram]

Originally posted by ALaS@Dec 2 2005, 11:02 AM
QUOTE

^^^ I hate to say it, but you probably would get yourself killed in a week flat with a Supra.

Why would I kill myself? [/b][/quote]
Maybe becuase you're racing base model piles of dog poop running 16's or more in the ¼ on public road ways?

...oh crap! Did I say that out loud?!

Edit: Back on topic. Coming up with those ratios generally depend on alot of things in combination. Miles per gallon, engine power utilization...and most of all...is there a similar car in their production line they can gank the tranny out of and not pay R&D expenses for making a new tranny?

 

[kidazn719]

so.. uhh.. back to gear ratios....