I originally installed my URD Fuel Upgrade kit in SoCal and then a Split-Second AFR calibrator on top of it. I was able to get some real gains in wide-open throttle / open loop tuning by enriching the mixture from the stock 14.7 : 1 down to about 11.5 or 12 : 1.
When I moved to Colorado, I re-tuned everything and ended up with a maximum enrichment in WOT/open loop of about 12.5 or 13:1.
Question :
When I have it floored out on the highway (as in passing another car at 80 MPH), and even at lower altitudes (Like 2,500 - 3,000 feet) I notice that the truck loses power and seems to retard itself. I have to back off the throttle a bit to get it to stop doing this. When I back off just a touch (and presumably return to closed loop) I actually gain power and the feeling of lope-ing is gone.
My LM1 tells me I'm smoothly moving from 14.7 : 1 down to about 13 : 1 but I start losing, rather than gaining power.
Map A is custom tuned by me.
Map B is all zeros.
Any ideas why this is? Everything I read is that I'd gain power (and did at sea-level) by enriching the mixture. Maybe I'm thinking of the wrong reason?
When I moved to Colorado, I re-tuned everything and ended up with a maximum enrichment in WOT/open loop of about 12.5 or 13:1.
Question :
When I have it floored out on the highway (as in passing another car at 80 MPH), and even at lower altitudes (Like 2,500 - 3,000 feet) I notice that the truck loses power and seems to retard itself. I have to back off the throttle a bit to get it to stop doing this. When I back off just a touch (and presumably return to closed loop) I actually gain power and the feeling of lope-ing is gone.
My LM1 tells me I'm smoothly moving from 14.7 : 1 down to about 13 : 1 but I start losing, rather than gaining power.
Map A is custom tuned by me.
Map B is all zeros.
Any ideas why this is? Everything I read is that I'd gain power (and did at sea-level) by enriching the mixture. Maybe I'm thinking of the wrong reason?