Welcome to Ultimate Subaru Message Board, my lurker friend!
|Welcome to Ultimate Subaru Message Board, an unparalleled Subaru community full of the greatest Subaru gurus and modders on the planet! We offer technical information and discussion about all things Subaru, the best and most popular all wheel drive vehicles ever created.
We offer all this information for free to everyone, even lurkers like you! All we ask in return is that you sign up and give back some of what you get out - without our awesome registered users none of this would be possible! Plus, you get way more great stuff as a member! Lurk to lose, participate to WIN*!
* The joy of participation and being generally awesome constitutes winning
** Not an actual guarantee, but seriously, you probably won't regret it!
Serving the Subaru Community since May 18th, 1998!
The indescribable things that make cars cool.
Posted 09 March 2011 - 06:15 AM
Posted 09 March 2011 - 07:18 AM
I'd recommend looking at an AWD gearbox, this way you've got maximum traction to get all the power to the road without the wheel spin.
To change the gear ratios in the gearbox for the best low 1st gear can be a bit of fun if you're up for the task... The only issue is that with this method your 2nd, 3rd and 4th gears also become "shorter" thus requires the engine to rev faster to maintain the same speeds as it would have before any modifications. 5th gear is independant of 1st - 4th gearsets so you can find your desired ratio and fit that for highway cruising.
Best bet would be the 3.7 diff ratio'd AWD gearbox that would be found in most bog standard legacy's (liberty in Oz). Find one of these then go hunting for either another gearbox or just the ring and pinion for a 4.11 or 4.44 (hard to find in Oz, dunno about the US though), fit this to your 1st gearbox that was 3.7 diff ratio standard and you'll have effectively lowered your 1st gear's ratio for a better take off. Run a legacy size tyre diametre and you'll be apples.
Someone will be able to shed more light on this I'm sure.
Posted 09 March 2011 - 10:42 AM
Are you trying to keep 4wd or do you plan on going Rwd? You could probably use the RX7 transmission and make a custom driveshaft to the rear. Someone else on here is doing a rotary swap, with just RWD.
Edited by WoodsWagon, 09 March 2011 - 10:44 AM.
Posted 09 March 2011 - 12:40 PM
And the oil cooler is on the way.
Posted 09 March 2011 - 02:22 PM
What is this single rotor 13b? 13b's were all twin rotors.
Posted 09 March 2011 - 04:00 PM
ie each rotor is 650cc and theres 2 of them
unless your making a 650a? thaty would be cool hahah
Posted 09 March 2011 - 06:49 PM
Being a Mazda rotary guy that is in the process of buying my first Suby this intrigues me. Any details would be great. I have several 13B,and 12A's laying about.
Posted 09 March 2011 - 08:05 PM
As far as tranny ratios go you're going to want to go high, 4.11 from a legacy or impreza because the higher rear end ratio will serve the higher revs of the 13B better and get it into the powerband faster.
Posted 10 March 2011 - 04:29 AM
Posted 10 March 2011 - 07:12 AM
Posted 02 April 2011 - 08:50 AM
The gearing will be interesting to work out - really need to know how this rotary performs on the street to get any idea of whether or not the stock subaru ratios will work with this engine.
As for the 4 or 5 speed question - 5 speed has a much better "step gap" to the top gear by splitting it with another gear. I've had loads with the 4 speed that bogged the EA81 going from 3rd to 4th unless you really flogged the engine to "jump" the gap in the revs between the different gears.
The 5 speed is generally nicer to drive, feels better in the gear changes unless the 4 speed has new gear lever bushes installed. The L series 5 speed is basically the same as the EJ/Legacy 5 speed, well over here it is as we've got the dual range function on the EJ/legacy 5 speed gearboxes where as I believe that you missed out on this in the US.
Hope this gives you something to think about/research.
0 user(s) are reading this topic
0 members, 0 guests, 0 anonymous users