Hello,
A friend of mine has a 2018 Silverado 5.3l with aftermarket (medium-size) cam, full boltons, e85/93, and a supporting mail order tune.
We think the mail order tune is conservative on timing advancement & would like to bump the high octane & e85 adder tables by a degree or two in the high load rpm range. Curious to what you guys think...
The high octane table currently shows maximum 22 degrees advance in WOT range (compared to 15.5 in stock tune). The E85 table shows max advance of 3 degrees in WOT range. There is also an advance multiplier table specifically for E85 that was slightly modified by the mail tune...
Looking at various scans, there is 0KR throughout every full throttle run regardless of fuel type (e85 and 93).
Going from 22 to 23 degrees should be fine assuming the KR stays at zero? Was also thinking of one extra degree to the e85 timing adder (from 3 to 4) which I assume would effectively allow the truck to pull a max 27 degrees of timing on e85? When KR shows up just knock down the timing a bit like any other car?
If I were to increase the e85 WOT cells advance from 3 to 4, do I also need to modify the e85 timing multiplier table? Anything else I should keep in mind when adding timing like AFR/e85, direct injected preferences, low octane tables?
Thanks & I look forward to hearing from you guys!