uh oh...
03-21-2011, 07:01 AM
#126
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more info:
I had a baseline tune from phil....I simply saved as a new file name for my car. I verify a few settings, but in that process, it changed the load vs rpm table. the original file had adjacent rows of 10.x psi, 14.x psi, 17.x psi and 20.x psi. keep in mind, I NEVER opened that table, just verified that it was still set for my 4bar map by looking at the fuel table. Only parameters I changed from the original file were motor size, crank pickup count, injector size and added a bit of fuel across the board for safety.
Fast forward to saturday. I set the AMS to be a soft boost setting of 10 psi co2 (about 14 psi actual boost). car hiccups bad about 500 ft out. PUll back to the pits, look at the tune up and find that the load axis had changed the 17.x psi row to 14.x psi....that meant I had two adjacent rows of 14psi. this happened to be the exact same as the boost as I was running. BS3 hiccuped and for whatever reason, it decided to use a value from high vaccum when it encountered that situation. (less fuel more spark). I looked back at the original tune I got from phil and that anomoly was not in that file...BS3 simply changed it for no apparent reason. Next time up in the lines it develops a bad knock during the burnout.. #2 piston siezed in the bore due to the heat and the rod ripped the bottom of the piston out.
we didn't pull it 100% apart but a quick survey shows:
Crank looks ok
block is damaged but fixable
#2 sleeve needs replaced
cam looks damaged
a few lifters looks damaged
at least one rod is damaged
BS3 had no reason to change that value and I've been unable to replicate this glitch
When the MAP reads 14psi, the BS3 should NEVER use a vacuum row for fueling and spark...I don't care if theres 5 rows that read 14psi
I had a baseline tune from phil....I simply saved as a new file name for my car. I verify a few settings, but in that process, it changed the load vs rpm table. the original file had adjacent rows of 10.x psi, 14.x psi, 17.x psi and 20.x psi. keep in mind, I NEVER opened that table, just verified that it was still set for my 4bar map by looking at the fuel table. Only parameters I changed from the original file were motor size, crank pickup count, injector size and added a bit of fuel across the board for safety.
Fast forward to saturday. I set the AMS to be a soft boost setting of 10 psi co2 (about 14 psi actual boost). car hiccups bad about 500 ft out. PUll back to the pits, look at the tune up and find that the load axis had changed the 17.x psi row to 14.x psi....that meant I had two adjacent rows of 14psi. this happened to be the exact same as the boost as I was running. BS3 hiccuped and for whatever reason, it decided to use a value from high vaccum when it encountered that situation. (less fuel more spark). I looked back at the original tune I got from phil and that anomoly was not in that file...BS3 simply changed it for no apparent reason. Next time up in the lines it develops a bad knock during the burnout.. #2 piston siezed in the bore due to the heat and the rod ripped the bottom of the piston out.
we didn't pull it 100% apart but a quick survey shows:
Crank looks ok
block is damaged but fixable
#2 sleeve needs replaced
cam looks damaged
a few lifters looks damaged
at least one rod is damaged
BS3 had no reason to change that value and I've been unable to replicate this glitch
When the MAP reads 14psi, the BS3 should NEVER use a vacuum row for fueling and spark...I don't care if theres 5 rows that read 14psi
03-23-2011, 07:08 AM
#132
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dunno why it changed the table...but thats easy to check on each and every upload. I've figured out why that table change caused the issue....I just don't know why they wrote the algorithm to default to such a low scaled load value in the event of a "conflict"
bottom line is I know how to prevent this from happening again.
bottom line is I know how to prevent this from happening again.
03-27-2011, 12:55 PM
#135
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looks like it needs:
2 sleeves
2 pistons
2 rods
cam
some lifters
welding up on the head...
the piston that broke played pong. the rod would knock it up, the valves would knock it back down. amazing thing is shawn said the valves don't look bent
2 sleeves
2 pistons
2 rods
cam
some lifters
welding up on the head...
the piston that broke played pong. the rod would knock it up, the valves would knock it back down. amazing thing is shawn said the valves don't look bent
03-27-2011, 12:57 PM
#136
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I did get over my frustration enough to go back in the garage...
fixed an issue keeping it from wanting to go into PARK
added a vent to the turbo oil drain to make the scavenge work better (I hope)
pulled turbo apart and cleaned it up....scavenge wasn't working too well (pulling a vacuum on the line) causing the housings to fill up with oil
changed rear springs for more adjustability...
pulled car out of garage and will bring the hood and golf cart in for some paint work
also gonna do some performance mods to the golf cart while I'm at it
fixed an issue keeping it from wanting to go into PARK
added a vent to the turbo oil drain to make the scavenge work better (I hope)
pulled turbo apart and cleaned it up....scavenge wasn't working too well (pulling a vacuum on the line) causing the housings to fill up with oil
changed rear springs for more adjustability...
pulled car out of garage and will bring the hood and golf cart in for some paint work
also gonna do some performance mods to the golf cart while I'm at it