Atomicbob's C6 Grand Sport 408 YSI
09-01-2016, 10:42 PM
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Atomicbob's C6 Grand Sport 408 YSI Mods on my c6 Grand Sport:
TMS dry sump 408 stroker ~10:1
LSA heads/BTR dual springs/upgraded rockers
Tick Stage2 blower cam
A&A YSi blower kit with 8-rib direct drive w/ 2.85 pulley
A&A dual fuel pump setup
AIS dual nozzle meth injection w/ m10 and m15 nozzles
McLeod RXT1200
ARH 1 7/8" headers/Akra exhaust
Ok so the car finally made it to the dyno but i am looking for some feedback. The car put down 755whp on 13 degrees of timing (2.85 pulley) on a superflow dyno. Tuner said it would knock if going above 13 degrees. Car was seeing 19 lbs of boost as well. In the meth reservoir was a 50/50 mix of meth and distilled water. My setup is also dual nozzle with an m10 and an m15 spraying full tilt.
As of now, the meth tank is being emptied and filled with 100% meth. Also an IAT breakout is being installed. Car will be retuned in the very near future.
My question is, at 13 degrees of timing and 19 lbs of boost, does this figure seem low? I also questioned if this was false knock and maybe the sensors need to be dummied down a bit to make them less sensitive.
TMS dry sump 408 stroker ~10:1
LSA heads/BTR dual springs/upgraded rockers
Tick Stage2 blower cam
A&A YSi blower kit with 8-rib direct drive w/ 2.85 pulley
A&A dual fuel pump setup
AIS dual nozzle meth injection w/ m10 and m15 nozzles
McLeod RXT1200
ARH 1 7/8" headers/Akra exhaust
Ok so the car finally made it to the dyno but i am looking for some feedback. The car put down 755whp on 13 degrees of timing (2.85 pulley) on a superflow dyno. Tuner said it would knock if going above 13 degrees. Car was seeing 19 lbs of boost as well. In the meth reservoir was a 50/50 mix of meth and distilled water. My setup is also dual nozzle with an m10 and an m15 spraying full tilt.
As of now, the meth tank is being emptied and filled with 100% meth. Also an IAT breakout is being installed. Car will be retuned in the very near future.
My question is, at 13 degrees of timing and 19 lbs of boost, does this figure seem low? I also questioned if this was false knock and maybe the sensors need to be dummied down a bit to make them less sensitive.
Last edited by Atomicbob; 09-01-2016 at 10:59 PM.
09-02-2016, 02:36 PM
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09-02-2016, 04:02 PM
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Welcome to the forums!
What fuel was used?
How are the meth nozzles set up in relation to the IAT sensor? And in relation to the blower (before and/or after)?
I wouldn't want to dummy down knock sensors, if anything I would rather have high resolution knock sensors, but that is something different entirely.
What size crank pulley are you using? Any belt slip issues with that 2.85" blower pulley?
What was your injector duty cycle?
What fuel was used?
How are the meth nozzles set up in relation to the IAT sensor? And in relation to the blower (before and/or after)?
I wouldn't want to dummy down knock sensors, if anything I would rather have high resolution knock sensors, but that is something different entirely.
What size crank pulley are you using? Any belt slip issues with that 2.85" blower pulley?
What was your injector duty cycle?