BHR builds another engine for Mazdamaniac. LIVE
#28
Banned
iTrader: (3)
Quick synopsis:
When Easy and I built the last motor (after over-heating the previous motor on the track), we were forced to use a LOT of really questionable parts because side-seals were on back-order, so this motor was a stop-gap, anyway.
But what did it in was a chain of events that propagated from my mis-installation of one of the front eccentric shaft thrust bearings, which I got pinched and was subsequently destroyed.
When I noticed the sudden increased e-shaft end=play, I tore down the front cover and replaced the bearing, but the bigger damage was already done (though I didn't know it).
The rotor bearings had already "walked" and the front main bearing in the stationary gear was toast.
This was almost a month ago.
On Sunday, I was late to grid for my third session - I was picking up a passenger.
The motor was cold, I floored it in turn 5 to catch the pack, hit a 16 PSI boost-spike (which wasn't what did in the motor) and then it coughed.
The loose clearances from the battered bearing plus the sudden punch in the sack from the over-boost put the front rotor on a slightly elliptical patch, causing the corner to catch the inside housing, break off a chunk and embed it in the steel, which subsequently tore off the other two corners, which made a ****-storm in that chamber, destroying everything.
After sitting in the paddock for a few hours, it started right up and I drove it the 40 miles home on the freeway at 75 MPH, which required a constant 7000 RPM and 4 - 8 PSI of boost.
It didn't overheat. lol
When Easy and I built the last motor (after over-heating the previous motor on the track), we were forced to use a LOT of really questionable parts because side-seals were on back-order, so this motor was a stop-gap, anyway.
But what did it in was a chain of events that propagated from my mis-installation of one of the front eccentric shaft thrust bearings, which I got pinched and was subsequently destroyed.
When I noticed the sudden increased e-shaft end=play, I tore down the front cover and replaced the bearing, but the bigger damage was already done (though I didn't know it).
The rotor bearings had already "walked" and the front main bearing in the stationary gear was toast.
This was almost a month ago.
On Sunday, I was late to grid for my third session - I was picking up a passenger.
The motor was cold, I floored it in turn 5 to catch the pack, hit a 16 PSI boost-spike (which wasn't what did in the motor) and then it coughed.
The loose clearances from the battered bearing plus the sudden punch in the sack from the over-boost put the front rotor on a slightly elliptical patch, causing the corner to catch the inside housing, break off a chunk and embed it in the steel, which subsequently tore off the other two corners, which made a ****-storm in that chamber, destroying everything.
After sitting in the paddock for a few hours, it started right up and I drove it the 40 miles home on the freeway at 75 MPH, which required a constant 7000 RPM and 4 - 8 PSI of boost.
It didn't overheat. lol
#32
Administrator
iTrader: (7)
It died on the track and thus it died a warrior's death.
Can't wait to see how this new motor comes out and compares to the last Franken-Motor.
Can't wait to see how this new motor comes out and compares to the last Franken-Motor.
#43
Pull My Finger
iTrader: (7)
No, not exactly. MM drove the car home, pulled the engine by himself (because I am a primadonna Bitch) and he, Easy, and I decided what should be done. I then measured everything, set the gaps, we all assembled the engine, and MM shall commence destroying this engine, too.
One of the perks of being part of the BHR team.![Wink](https://www.rx8club.com/images/smilies/wink.gif)
One of the perks of being part of the BHR team.
![Wink](https://www.rx8club.com/images/smilies/wink.gif)
![Smoker](https://www.rx8club.com/images/smilies/smoker.gif)
#44
Administrator
iTrader: (7)
****, I need to get my name on this list too!
#46
Illudium Q-36 Space Moderator
iTrader: (1)
Yeah, a BHR motor done up from square one really is a whole different animal than an OEM one...I really feel like I got that last 2-3% of power that contributes to a snappy throttle rather than a lazy one. And that is over an above the lightweight clutch, cause I drove bobby's too - and mine is still snappier.
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