Just wondering if someone would be able to help me out in getting an OS change for my e38 ECM. or is it not necessary? The generic help button for HP Tuners dose not seem to work. I do not have the options on my OS tab. Editing my VVE table was straight forward. but my spark tables only go to 1.36G. how are people controlling their spark over 1.36G? i have read that scaling the tune is an option but acracy Diminishes on the spark tuning. Turbo 5.3 would like to run around 12# this summer. Also only have access to 91 sometimes 93. have not been able to drive it yet due to snow, currently just trying to get the tune set up for a drive. this is the tune with the things i have changed to get it to start an run fairly well.
any help will be appreciated,
Thanks
Single cab booost 1.01.hpt