Ok, if someone does a type r engine swap they cant use the hydro tranny on our cars correct? so basically we use our original trannys… my question is, since the gearing ratios or whatever are most likely different, what exactly are those differences and how does it affect the performance of the type r engine?
in other words pit against a type r, how would our cars fair against it?
right, the hydro tranny can’t be used (actually it can be, but its expensive, timely, and NOT worth it!).
however you don’t want to use your stock tranny either. the stock ls tranny has fairly long gears —so you’ll want to use a vtec cable tranny (one from a jdm b16a or from a 92-93 b17a) which will have shorter gears. In fact, even if you stick w/ the ls engine you’ll most likely want to upgrade to a vtec tranny as well.
here is a page with all the gearing for both hydro and cable b series transmissions: http://tiiite.b16a.com/Bgears.htm
What is hte advantage of shorter gearing?
You can get to the power band quicker and you accelerate faster. I’ve got a GS-R YS1 on my LS engine and its a blast. Burn outs are a lot easier too.
-Steve
you know how your 1st gear feels really quick? how you reach redline really fast, and it just feels really torquey. But less so in the higher gears? well, shorter gearing will make each gear feel a little faster, and more like a lower gear.
honda matched shorter gears up with their vtec engines because the long gears just aren’t for performance, they are more of an economy thing.
gearing can make a huge difference in how a car feels, how fun it is to drive, and how fast it accelerates.
Wow, didn’t realize this, so why do people that are going to go the forced induction route keep the tranny? is it cause the shorter gears would be tooo quick when accelerating due ot excess horsepower and speed of accel so they opt for the longer ratio?
i’m not completely sure about why turbo people stick w/ the ls tranny. but i thought it was because of either traction problems or the fact that the shorter gears don’t allow the turbo to spool like it does with longer gears.
Turbo people us longer LS tranny’s cause it lets them stay in boost longer. They have the power to over come the longer gears and with a turbo, staying in boost is everything.
A shorter tranny would make them shift sooner and they would not be under boost that long.
-Steve
Hmm, well that clears up some confusion.
Just trying ot make a decision with what i want to do, most likely i see myself just fortifying the engine i have, and going the forced induction route…
There’s just so much i want to do, and yet only so lil money to do it with, a slow but on going process…
Anyways thx for the help guys, Philip
Thats why we’re here man.
-Steve
Take advantage of using longer gearing, if your motor makes a good amount of torque. Not peak, but the overall amount of it @ lowend & high. Also, it depends on the circuit you drive in… city or highway.
For example the ITR: Changing final drive ratio will change the overall gearing. Honda switched to a 4.785 final drive for the newer versions to yield better overall lap times on their twisty road courses (Best Motoring). With the 4.400 final, they would come out of the turns and would sometimes be below torque, and at times… would have to be 1 gear lower, but 1 gear lower would be too high of a rev to shoot out of a turn. With the 4.785, they just kept it in gear …sailing through the same set of turns. They needed to keep it at least around 6300rpm after the turn. It is what made lap times better.
Disadvantage to shorter gearing: “Too short… that it lands where torque is decreasing” (this is where you make more noise than pulling away).
Why its a good idea to stay with longer gears for FI…
You give time for spool up, and boost also makes good amount of torque. Downfall for FI: its hard to keep oil temp down. FI actually looses in endurance curcuit racing.