Current infrastructure of the country is layers of highly toxic lead that has been decaying and finally reaching it's critical in the last couple decades.

Drink some more water from your 60 year old lead pipes and buy that house with the lead paint that chippings...no big deal.

ive built aircraft engines, reciprocating, radial, and turbine, i know how it all works, More so then you will probably ever know. Repairing and rebuilding 4000hp+ turbine engines ( HW T55's for the chinook) is what i did in the army lol.. All your o2 sensors do is trim the fuel based on the lean/rich state of the combustion. (thats the upstream o2) the down stream is just there to make sur yur cats are still working properly... 14.7 a/f ratio is the satisfactory stoichiometric value for optimal combustion.

Your car engines are childsplay in comparison my friend.

lmk when you get federally certified to work on $1mil+ military engines.

This post was edited by TURBO_DODGE on Jul 20 2014 04:46pm

large aircraft engines that turn low rpm are not the same as high performance car engines
use differant types of fuel changes almost all aspects of how rich or lean and engine runs
I thought 14.7 is the ideal ratio for emissions not for load ratios?
highway cruising can be leaner than 14.7 and be ideal

14.7 Lol

So explain exactly what that plug in tuner changes to grant you 9mpg better highway economy than advertised.


O2 sensors oscillate between 14.6:1 and 14.8:1. Some vehicles have a lean cruise state that allows a leaner afr under certain conditions. Some don't. What exactly is that tuner doing to have such a big effect? A stock tune in anything these days is already set up for max safe economy. Making power is the easy part. Any monkey can do that.

Please explain to me exactly what it changes. I asked 3 times so you hopefully won't dodge it.

Not an expert but my guess would be it changes timing and if its a DI engine it changes the injection timings
Also some cars can run much leaner than 14.7 at highway crusing I have seen some e85 cars get nearly the same MPG as gas cars just because they are running so lean(should be 30%~ less mpg)
OEM tunes are really mild with timing and they tend to be pretty rich on the tunes at least under load conditions

I get 8-9 mpg beat that

That is the lean cruise i spoke of. Wot timing is usually conservative but they actually run them pretty aggressive in the light load tables. 34-42 degrees is not uncommon from what i've seen. My point to him is OEM's spend far more time maximizing fuel economy in the tune than anything else. Most handheld tuners allow you to tune for premium if it isn't already required and give you the timing bump that allows. His already requires premium (so they can rum aggressive timing to help the mileage).

Other than that they mess with some TB tables and PE to give better (quicker) throttle response. It's all shooting in the dark though with no data logging or wideband. That's why handhelds are so limited. They have to be conservative too. Every car is different but they are loading the same tune to all of them. One of my friend's bought a T/A with a hypertech PP III already on it and it was running so lean at cruise the guys at vengeance were surprised it hadn't blown up.


Still waiting on Turbo Terd even though i just gave him most of the answers. I want specifics.

837 hp and 88 mpg

cmon bro..... you should know this

I love watching him squirm. He should totally leave jsp alone agajn and focus on the MIT physics classes...