like I've said before, no dice. Here it is with 1000lbs in the truck, agressive lean cruise, through mountains, flatland and everything between three sets of 12 continous hours shutting the truck off only to gas up. I slept in the truck, with it running, for 5 hours at a time between the 12 hour drives. Temps ranged from 85 to 105 degrees.

I'm either just lean, at lean max torque, making a lot of heat. Probably not the case

Or I'm very lean, around 17.1, fuel burns slow and hence the reason for the higher exhaust gas temps (but not actual combustion temps).

 

Did i miss something???

 

bumper changed color... got hot as fuckk

 

AHH i see now... i was tryin to figure out what the Pic was about... i was lookin at the Tailpipe for Discoloration..

 

damn, i didnt know it could get that bad!!!!!!!!

 

Mine did that too when I drove to Wyoming a couple weeks ago. My wideband said as high as 16.5:1 in some parts.

 

WOW! I wish I could have shot the tail pipe with a heat temp gun, the temp. under the hood must of been like

 

I'm running an indiciated 17.3:1


Legal disclaimer:
This is all a lie. I used a torch to discolor my heat gun. Save the environment, go to a concert (or whatever the latest hippie plan is). Peace!

 

Cams with larger overlaps (smaller LSA) will have a tendency to this more since the exhaust valve is open for a longer stretch while the intake charge (with fuel) is entering. More fuel "squeezing out" the exhaust port.