RX8 E-shaft vs 13B-RE/REW shaft

joff · 06-13-2009, 03:45 PM

Quote:

Originally Posted by vex

It's from an ASE article regarding the 13B engine from an FD.

I figured it must have been from SAE -- I wish those papers were cheaper than $15 an article. Thanks for sharing and attempting to accomodate a newbie, but I think I'll still need to read the full text to really understand whats being said here. :-)

vex · 06-13-2009, 10:08 PM

Quote:

Originally Posted by joff

I figured it must have been from SAE -- I wish those papers were cheaper than $15 an article. Thanks for sharing and attempting to accomodate a newbie, but I think I'll still need to read the full text to really understand whats being said here. :-)

I swear I have portions of dyslexia or something, I screw up so many acronyms.

Chadwick · 06-17-2009, 09:50 PM

Not to discount Glen’s findings as I respect his knowledge and personal experience, but seeing how my name was brought up I figured I should respond.

The RX8 shaft has been in my car since March of 08 and has consistently been spun to 9k RPM and seen above 300 lbs rwtrq. We pulled the motor apart a few months ago to try out the ALS apex seals and the front and rear stationary gears show no signs of wear and the shaft is still like new. As a mater of fact, most of the bearing babit was still there. I would estimate at that time the motor had close to 30 races on it and around 400 street miles. Now the motor has around 40 races on it and another 600 street miles and is still going strong. At the most resent ProSolo we gave last years National Champion in a 500+ rwhp, single turbo, 3 rotor a good run for the money.

I have plans at the end of this race season to drop this motor in my street car and build a new one for the race car. The new build will be using the RX8 eccentric shaft along with a few other tricks to reduce the rotating mass. Time will tell, but at this point I see no reason to go back to an REW e-shaft.

Dan

MOBEONER · 07-10-2009, 06:06 PM

when you guys use the rx8 eccentrics do you also get your rotors lightened as well or do you just swap eccentrics?
I am rebuilding my engine in November just to freshen it up. Its reading 15psi vac right now and i would like to rebuild it and i am interested in the rx8 eccentric.

730RWHP12A · 10-19-2010, 11:20 PM

Quote:

Originally Posted by Chadwick

Not to discount Glen’s findings as I respect his knowledge and personal experience, but seeing how my name was brought up I figured I should respond.

The RX8 shaft has been in my car since March of 08 and has consistently been spun to 9k RPM and seen above 300 lbs rwtrq. We pulled the motor apart a few months ago to try out the ALS apex seals and the front and rear stationary gears show no signs of wear and the shaft is still like new. As a mater of fact, most of the bearing babit was still there. I would estimate at that time the motor had close to 30 races on it and around 400 street miles. Now the motor has around 40 races on it and another 600 street miles and is still going strong. At the most resent ProSolo we gave last years National Champion in a 500+ rwhp, single turbo, 3 rotor a good run for the money.

I have plans at the end of this race season to drop this motor in my street car and build a new one for the race car. The new build will be using the RX8 eccentric shaft along with a few other tricks to reduce the rotating mass. Time will tell, but at this point I see no reason to go back to an REW e-shaft.

Dan

what class did you run ?

Chadwick · 10-30-2010, 07:21 AM

Quote:

Originally Posted by 730RWHP12A

what class did you run ?

We run the car in SSM.

06-17-2009, 09:50 PM	#3
Chadwick Rotary Fanatic Join Date: Feb 2008 Location: Smyrna, TN, USA Posts: 239 Rep Power: 18	Not to discount Glen’s findings as I respect his knowledge and personal experience, but seeing how my name was brought up I figured I should respond. The RX8 shaft has been in my car since March of 08 and has consistently been spun to 9k RPM and seen above 300 lbs rwtrq. We pulled the motor apart a few months ago to try out the ALS apex seals and the front and rear stationary gears show no signs of wear and the shaft is still like new. As a mater of fact, most of the bearing babit was still there. I would estimate at that time the motor had close to 30 races on it and around 400 street miles. Now the motor has around 40 races on it and another 600 street miles and is still going strong. At the most resent ProSolo we gave last years National Champion in a 500+ rwhp, single turbo, 3 rotor a good run for the money. I have plans at the end of this race season to drop this motor in my street car and build a new one for the race car. The new build will be using the RX8 eccentric shaft along with a few other tricks to reduce the rotating mass. Time will tell, but at this point I see no reason to go back to an REW e-shaft. Dan __________________ 93 RX7 BB (Race Car) 93 RX7 SSM (Soon to be IBM and a daily driver) 05 Silverado Z71 08 Mini Cooper 80 LS RX7 (for sale)

07-10-2009, 06:06 PM	#4
MOBEONER Rotary Fan in Training Join Date: Jan 2009 Posts: 30 Rep Power: 0	when you guys use the rx8 eccentrics do you also get your rotors lightened as well or do you just swap eccentrics? I am rebuilding my engine in November just to freshen it up. Its reading 15psi vac right now and i would like to rebuild it and i am interested in the rx8 eccentric. __________________ Hit em and run plumbing Last edited by MOBEONER; 07-10-2009 at 06:09 PM.