SleepR1

KDR's Dave Barninger told me there are no more 13B REW remans available. All KDR can do is tear down and rebuild the blown motor with good used, or new engine parts. Mine's currently @ Rx7 Store waiting to be disassembled. It's been there for over a month. Failure occured June 1 @ Mid Ohio Sports Car Course, 45 minutes north of Columbus OH. If the motor had to fail, it might as well fail within a 50-mile radius of where the nearest FD Rx7 shop is.

AMRAAM4

Well, Demetrios who does all my work said that this is an option, especially if the motor has not blown yet (knock on wood). However, a question I have never really found answered is whether a coolant seal failure can be fixed with this process and if so whether it will be a sound fix. I know an apex seal or housing can be fixed this way, but isn't the seal a tougher fix. I dunno, I am having a brain fart here I think.

mp5

iTrader: (3)

Mazda reman,30k miles,coolant seal failure


Manny, wondered if you solved the overheating issue?given it all to do again what would you do different?

SleepR1

Motor only ran warm at open track events. Temps would range in the 115s to 117s C at the end of track session during spring/summer months. This is no surprise given constant boosting at 10 to 12 psi.

On the street, with 15 psi boost, A/C on, and 90-degree ambient temp (summer), temps would climb to 95 C.

My KDR motor is comparable to a Rotorsports Racing Stage 3, except my KDR had 2-mm apex seals http://www.rotorsportsracing.com/per...ng/engines.htm

KDR motor lost compression in the front rotor after 18000 miles/18 months. It's still a mystery as to HOW the front rotor lost compression. I don't think the failure was heat-related. As soon as Rx7 Store's zayrx7, Jason and rotarded can crack my motor open, and look at all the parts--we'll know what's up.

What would I do differently? Drive a naturally aspirated German car (Porsche or BMW)...

mp5

iTrader: (3)

Yep,took the 325 around Mid Ohio at HPDE, didnt miss a beat...but is was slooow.

SleepR1

I once heard, PCA club racer and instructor, Greg Fishman say, "fast, reliable, or cheap...pick one"