View Full Version : Power Mods Long or short gear tranny?
chaseamundo
03-30-2011, 07:54 PM
So i have been in debate with a buddy of mine over whether or not a long gear tranny is better for boost vs short gear and it has me thinking. I always thought short gear is better for NA and long gear for boost. Can someone WITH EXPERIENCE point me in the right direction here.
I dont know if it matters but the motor we are debating over is a 2.2 which is more Trq (in honda scene) and looking at big 16G size turbo.
Thank you,
Chase
blown_ss
03-30-2011, 09:09 PM
longer gearing is better for boost any day. just think about how much you would be shifting with a short geared tranny with boost. turbo cars build pressure over a rpm band and you dont get your max boost just because you floor a car it comes at a certain rpm. max boost=max hp. with that said with a long gear tranny you will be at max boost/hp for a longer time.
chaseamundo
03-30-2011, 09:32 PM
Thank you. thats what i was thinking but i had to make sure i was right before i continued to argue haha. thanks man.
longer gearing is better for boost any day. just think about how much you would be shifting with a short geared tranny with boost. turbo cars build pressure over a rpm band and you dont get your max boost just because you floor a car it comes at a certain rpm. max boost=max hp. with that said with a long gear tranny you will be at max boost/hp for a longer time.
depends on how much power your going to make. if your not making a big amount of power, you might want to consider a kinda short transmission thats geared for acceleration ... although if you have ALOT of power to pull then a long tranny will do great
blown_ss
03-31-2011, 04:30 PM
depends on how much power your going to make. if your not making a big amount of power, you might want to consider a kinda short transmission thats geared for acceleration ... although if you have ALOT of power to pull then a long tranny will do great
this is true too. i was just talking in general. i would rather have a short geared tranny any day for boost.
chaseamundo
03-31-2011, 05:52 PM
whats your idea of big power? like 300?
whats your idea of big power? like 300?
hell no LOL, 500+ would justify a uber long tranny in my eyes
chaseamundo
03-31-2011, 09:44 PM
ok, so im better off with short gear haha bc im shooting for 300
ok, so im better off with short gear haha bc im shooting for 300
you will love it, as long as you get a turbo that supports your power goals (300ish) and spools uber quick WITH a close tranny, it will feel like a nasty dope all motor car
chaseamundo
04-01-2011, 10:17 AM
I like.....Love that idea haha
Drummerboy
04-01-2011, 02:56 PM
longer gearing is better for boost any day.
i would rather have a short geared tranny any day for boost.
...huh?
I personally love my F22 tranny (long gears) with boost. I made 347whp, 313 trq and never felt like my tranny was holding me back. I've considered an H22 tranny, but I drive too much on the highway to have gears that short.
chaseamundo
04-01-2011, 10:59 PM
drummerboy, you need to clear your inbox haha
this is off topic but when you made 347hp, what was done to your motor?
Bc im thinking ima do a factory oem rebuild on the head, arp headstuds, cometic headgasket, and oem rods and pistons.
Looking to make 300hp.(possibly going to get bisimoto forged rods and pistons)
JKOBD
04-03-2011, 09:37 AM
A shorter geared trans will out accelerate a longer geared trans anyday on paper. The issues come into play as to when you can not get the power to the ground effectively or you are out of rpm/mph and need to go to a longer geared tranny. My car made 800+whp and went 15Xmph in the 1/4 and I am using an ITR trans. If you can get the power to the ground and have the rpm/mph that you need, go with the shorter geared trans.
Berta
04-03-2011, 08:08 PM
A shorter geared trans will out accelerate a longer geared trans anyday on paper. The issues come into play as to when you can not get the power to the ground effectively or you are out of rpm/mph and need to go to a longer geared tranny. My car made 800+whp and went 15Xmph in the 1/4 and I am using an ITR trans. If you can get the power to the ground and have the rpm/mph that you need, go with the shorter geared trans.
Well said!!!
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