Bratman
Standard Bore
I have a Roadster with TORS and underseat K&N and just got TuneECU and some dyno tuning; 131 hp/148 ft lb torque. TuneECU with 100% open secondaries everywhere, air fuel richer bottom and top and a bit richer through the middle, timing +2 degrees, 6700 rev limiter, speed limiter raised to 299 km (max). This is based on the 20355 TORS tune.
Interesting issue; when we dyno in 4th gear the air fuel line is pretty much flat at 13 right to the limiter, however, when we try it in 5th it spikes to 15 @ 5.5 - 6k rpm, then back to 13 by 6.2k rpm.
Can't figure out why 4th gear has flat air fuel but 5th gear spikes. Making changes in Tune ECU to correct for the spike seem to only affect the 4th gear air fuel but do not seem to affect the spike in 5th (?). Thought it might be misreading, but we tried a bunch of times with same results. The hp & torque were very consistent though regardless of the air fuel spike and 4th vs 5th gear.
Your help or any thoughts would be appreciated. Thanks in advance.
Cheers,
Alex
Interesting issue; when we dyno in 4th gear the air fuel line is pretty much flat at 13 right to the limiter, however, when we try it in 5th it spikes to 15 @ 5.5 - 6k rpm, then back to 13 by 6.2k rpm.
Can't figure out why 4th gear has flat air fuel but 5th gear spikes. Making changes in Tune ECU to correct for the spike seem to only affect the 4th gear air fuel but do not seem to affect the spike in 5th (?). Thought it might be misreading, but we tried a bunch of times with same results. The hp & torque were very consistent though regardless of the air fuel spike and 4th vs 5th gear.
Your help or any thoughts would be appreciated. Thanks in advance.
Cheers,
Alex