what kind of truck? drivetrain loss puts me at 525/625 at the flywheel...

 

 

No way was that sarcastic!
15 mpg with that power!

I would like to have one.

 

well thats 15mpg including 4 dyno pulls... so id say just highway driving i could easily get 16, i was running 80 the whole way.

 

I've only had one car in my life with anything close to that power
72 charger 8 mpg

forgot to mention it had an old hemi i got from a fertilizer truck!

 

I get the best MPG (17-18) at 85mph, a few others have said the same thing. Only theroy I have is that an air dam builds up in front of the truck and rounds off the nose some. Otherwise I'm pretty consistant at 16.75 mpg (+/- .15) @ 75-80 mph.

I'm hoping for a little better with the new spark plugs I just installed. I'm getting ready to go to town now and fill up, and I'll have priliminary data by Wednesday when I have to fill up again.

 

A smaller picture would be nice

A smaller picture would be nice

 

HI!... See if you actually had something between your ears to prevent my words from travelling right through then mabey it would sink it.

 

can yall take your crap to another thread. lets keep the focus on Builts truck here

 

I don't know why , but I though that the lightnings came with 54's (Injectors) - Someone correct me please - Wish I remember where I got that number at --

Oh well - SWEET Dyno Run Joey


CRAP , I'm going to have a hangover in the morning - WAIT!! - IT'S MORNING Hell , I feel pretty good -

 

Lightnings have 42# injectors,,stock!

Phil

 

You can speculate all you want at what you have at the flywheel, you will never know unless you put the motor on a dyno. You are getting good fuel mileage because you are running lean as hell! Richen it up and you'll kiss the fuel economy bye bye. Danoids truck is a L. But the point remains. You aren't maxing out the injectors. You do know you can datalog for this correct? Don't assume that since you richened up the fuel on your programmer and you didn't see any results that the injectors are maxed. If they were to be close you would start trending lean towards the end of the run, not the beginning.

 

yea i figured that out now, good to know. I am running 14.3 at part throttle, which is correct, its just lean at wot

 

Very nice, A/F ratios looking better, might want to fix that lean WOT open throttle condition though. Awesome looking and performing truck, I'm jealous.

 

Yeah it needs fixed bad, that is dangerously lean, i bet you that i would have a vented block if it weren't a built engine... anyway, my tuner told me that he has no idea why its so lean, he gave it a bunch of fuel. :| thanks for the help.