transmission question

[Seanzyyy]

i'm getting ready to do an rb25 swap in the next few weeks.
right now i have an auto trans,
many of you prolly are asking why,
but i got a good deal for the motor as it was already wired for an s13, runs beautifully, and it's sitting in a vert that i'll be selling to a friend once the motor is out.

i am going to more than likely run with the auto transmission for a while as i don't see it diminishing the fun of driving a little boosted 240 for a while.
money has been coming in slowly so i just want to enjoy a reliable 240 that's fun to drive.

i have realized that rb25 manual transmissions are quite expensive, ranging anywhere from 800 (slightly damaged) to 2600 (brand new) and that is pretty pricey for my income.

i have read that vg30 transmissions use the same gears as the rb's and that makes it a great alternate when i eventually go 5 speed, especially knowing it bolt's right up to the rb bellhousing.
it is longer than the rb25 trans but there is a bracket out there that solves the shifter location issue.
that seem's good but at the same time, i'd have to get a manual trans bellhousing which would be at least a few hundred, raising the total cost close to just buying the rb25 trans (with bellhousing).

another alternative i've been contemplating is using an rb20 transmission.
i'm prepared to be flamed about the idea but they are going to be way cheaper for me and from what i've noticed they can hold more than enough power for my goals for the near future.
but i've read that pretty much everyone says it is pointless, the rb20 trans will get destroyed, yadda yadda ya.

my power goal is a MAX 350hp.
i don't plan on going any higher than that for a long time as it is just unnecessary to have any more than that for a while.
when the time comes for me to go higher, i'll be making enough money to not have this question.

but for now, my basic question is:

how will an rb20 transmission do if mated to an rb25 that is 100% or very close to stock? 350hp is the limit.

i have searched here, google, and rbforums and haven't found the info i'm looking for.

for those that flame, that's fine lol
for those that have helpful info, thanks.

[Carl H]

rb20 trans will hold power just fine, just be nice to it and dont do 7krpm clutch dumps or put drag radials on the car.

[Seanzyyy]

rb20 trans will hold power just fine, just be nice to it and dont do 7krpm clutch dumps or put drag radials on the car.

alrightyy.
the way i'm gonna be driving it is just cruising around with friends,
the occasional drifting every other weekend for a few hours.
but nothing too drastic.
lol no drag radials for me.

thanks Carl!

[ST240]

rb20 trans will hold power just fine, just be nice to it and dont do 7krpm clutch dumps or put drag radials on the car.

I think the key to not grenading your rb20 transmission is not having lots of torque. Apparently the gears like to strip.

Lets see how long my rb20 transmission lasts at the track on my rb30 with ET street IIs. Muahaha.

Good thing i found a rb26 transmission for dirt cheap. Gonna use Z32 transmission next go around.

[RustspecS13]

Keep in mind its the same transmission behind KA/KA-Ts,SR and CA's so you will just make more torque then most of them.

But a 350whp RB25 will probably be comparable in torque/abuse as a 350whp KA-T so you'll probably be fine for quite a while.

~Alex

[Seanzyyy]

Keep in mind its the same transmission behind KA/KA-Ts,SR and CA's so you will just make more torque then most of them.

But a 350whp RB25 will probably be comparable in torque/abuse as a 350whp KA-T so you'll probably be fine for quite a while.

~Alex

that's what i figured lol.
everyone's heard of 400+ hp sr's and ka-t's so i guess the rb20 trans will be just fine.

[amakadius]

rb20 trans will hold power just fine, just be nice to it and dont do 7krpm clutch dumps or put drag radials on the car.

alrightyy.
the way i'm gonna be driving it is just cruising around with friends,
the occasional drifting every other weekend for a few hours.
but nothing too drastic.
lol no drag radials for me.

thanks Carl!

your rb20 tran will fall apart and wont last. i know people who have gone through the 20 and always have to repair over and over . good luck

[Carl H]

my 20 box must be made of unobtanium or something...still together after me flogging it for almost 7 years now.
the 30 might do it in tho...

[Pantaro]

im actually gonna do the same thing at the end of the month,gonna order the rb25 and just need to locate a rb20 bellhousing

[Seanzyyy]

alright, new question.
I found the answer somewhere but forgot what it was and where I found it

if i use an rb20 transmission,
will i be able to reuse my s13 driveshaft?
and if i were to use the rb20 transmission,
how would the shifter location be?
if my mounting kit is designed to put the shifter in the factory position for the 25 trans,
wouldn't the 20 sit a little forward?