MitsuStyle - View Single Post - Lucky #13...Back in the saddle....92 rt/tt

niterydr · 05-22-2012

I just realized I didn't post the "progress" charts...

The 9b's are probably cores now which sucks because we spiked over 26.5psi out of them!

(hit fuel cut at 26 psi @3500 or so). Still only 14psi or so at redline, but had a good area under the curve.
22psi to 14psi = 348hp/422tq
25.8psi to 14psi = 368hp/480tq
24.5psi to 14psi = 345hp/455tq

Green pull was "close enough" at 21psi spike-14 to redline. Wanted to leave some on the table. Then we decided to turn it up to an all boost setting (ramp it up fast), which is the blue graph. Timing is VERY conservative on that pull under higher boost, as we had not ventured that high yet in the map.

Car started to misfire at 6100rpm, so we shut down. The power dip wasn't to concerning as we had pulled some timing for safety and figured it would be down on power, the misfire was a bit concerning, hence the shutdown. Checked the car over and it seemed okay, so we figured the misfire was from the lack of timing we added back the timing that worked, see the red graph.

When the car nosed off again up top, something was not right obviously.

We didn't hear much noise (sounded like Throw-out bearing chatter) so did another quick pull starting at 3000, 4300rpm hits, BOOM, smoke screen, car noses over, clutch in, coast to the side of the road. car is still running but sounds like a bag of marbles in a washing machine, shut it down and coast to the side of the road.

My analysis:
Odds are the damage was done @5100rpm on the red pull when it nosed over. Technically it could have actually happened around 5900rpm on the pull before, but I just can't believe that the car made one last go at it and made similar if not more power on the red pull (until it nosed off).

Spun the bearing there and dropped out the cylinder (red graph), next pull was just icing on the death cake. Should have just called it when we heard the chatter instead of assuming it was the loose TOB (weak slave cylinder), 155,800 miles on it with an unknown history=shit happens.

I will have to tear this one down to see what happened. E-85 doesn't show knock on the AEM really. However this motor was quieter from a knock noise standpoint compared to most 3/s I see (pump or E-85, under 1V). When the motor let go, it hit 4V. End of the red pull it was 2V or so....I really really don't think it was detonating, but the motor will tell the story.

05-22-2012	#2
niterydr back in the saddle again 24 Hours Rally Champion! 3D Pacman white house edition Champion! 3D Racing - Track 2 Champion! ATV Winter Challenge Champion! Bloody Pingu Champion! WRX Racing 2 Champion! Tournaments Won: 5 Join Date: Oct 2003 Location: Elkhart Texas Drives: 2015 Ram Quad Cab Hemi, 1999 FRC Corvette, 93 Stealth Turbo Posts: 6,411	Re: Lucky #13...Back in the saddle....92 rt/tt I just realized I didn't post the "progress" charts... The 9b's are probably cores now which sucks because we spiked over 26.5psi out of them! (hit fuel cut at 26 psi @3500 or so). Still only 14psi or so at redline, but had a good area under the curve. 22psi to 14psi = 348hp/422tq 25.8psi to 14psi = 368hp/480tq 24.5psi to 14psi = 345hp/455tq Green pull was "close enough" at 21psi spike-14 to redline. Wanted to leave some on the table. Then we decided to turn it up to an all boost setting (ramp it up fast), which is the blue graph. Timing is VERY conservative on that pull under higher boost, as we had not ventured that high yet in the map. Car started to misfire at 6100rpm, so we shut down. The power dip wasn't to concerning as we had pulled some timing for safety and figured it would be down on power, the misfire was a bit concerning, hence the shutdown. Checked the car over and it seemed okay, so we figured the misfire was from the lack of timing we added back the timing that worked, see the red graph. When the car nosed off again up top, something was not right obviously. We didn't hear much noise (sounded like Throw-out bearing chatter) so did another quick pull starting at 3000, 4300rpm hits, BOOM, smoke screen, car noses over, clutch in, coast to the side of the road. car is still running but sounds like a bag of marbles in a washing machine, shut it down and coast to the side of the road. My analysis: Odds are the damage was done @5100rpm on the red pull when it nosed over. Technically it could have actually happened around 5900rpm on the pull before, but I just can't believe that the car made one last go at it and made similar if not more power on the red pull (until it nosed off). Spun the bearing there and dropped out the cylinder (red graph), next pull was just icing on the death cake. Should have just called it when we heard the chatter instead of assuming it was the loose TOB (weak slave cylinder), 155,800 miles on it with an unknown history=shit happens. I will have to tear this one down to see what happened. E-85 doesn't show knock on the AEM really. However this motor was quieter from a knock noise standpoint compared to most 3/s I see (pump or E-85, under 1V). When the motor let go, it hit 4V. End of the red pull it was 2V or so....I really really don't think it was detonating, but the motor will tell the story. __________________ My street car runs low 11's and my race car's personal best is a mid 11.... Last edited by niterydr; 05-22-2012 at 04:05 PM..