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Tuning for optimal mpg with DHP

Amen Scotty! But lucky I'm in NJ a lot lol and btw I'm from Brooklyn I HATE Staten Island with every fiber of my being BUT can't afford to move right now LOL my ex wife lives in Brooklyn with my son and my GF lives in NJ so I'm in traffic a LOT of the time it sucks but is what it is lol I've heard from people check my o2 sensor even if it's not throwing a code yadda yadda I'd love to see proof from anyone beyond DIC real proof that they are getting 30 mpg even if it's majority highway I still get 22ish
 


Brooklyn's no better for stop and go...... good thing you get the toll discounts, tolls alone could beat you down too.

i forget the name of the bridge to NJ, but boy aint hat one a pos lol i think they could have made it 3 foot narrower, so much fun in a roll off truck. all wheels are on the lines.

is that the Hamilton? its been years since i had to work over there.

funny too how the top of SI is a sh it hole, the south is much nicer. even near the land fill is nice homes. f ing hylan blvd, dont miss that torn up pos road either.
 


Yea I'm in the same boat as you Scotty manuals don't really tell much that's useful.. and I don't want to just start changing things and mess my car up
 
there are plenty of gm manuals on our EFI system. the whole damn mess is absolute values with major /minor/minorest tables that are all additive/subtractive/multiplicative.

its easy
 


Where can I get the manuals? I got no problem reading and learning but people don't want to help I guess cause everyone's help has been "check bills drop box" which has useful stuff but manuals are kinda garbage
 
Yes I'm aware of that it's common sense BUT when editing a chart with specific settings that I'm not 100% sure how it will effect the other settings etc I'm not asking for someone to tune my car I'm just asking for advice from people who have probably gone threw the same thing and know what I can and can't mess with that's all.. if someone simply said oh okay mess with the MAF airflow table, PE, AE etc etc it would help a lot I'm not a complete idiot I just don't want to mess my car up doing something that is wrong
 
Everything is percentage based. Take 4% out and you get 4% less fuel. Add 4% and you'll get 4% more. This holds true for everything youll need im the 3800 pcm and almost everything in other ecus.
 
Luckily making a mistake is not going to mess your car up.
If you fail at some common sense things then you have a chance of commanding 50 degrees of timing at wot or leaning it out too much but youll be able to see those things before they become a problem.
 


With most parameters, you'll be safe if you make small, incremental changes and go back if you don't get the desired results.

And yeah, the DIC readings will get more bogus the higher your MPG gets. I regularly calculate MPG, if I get 32 avg. the DIC will read about 34/35, if I drive almost pure highway and calculate 36 avg, the DIC will read nuts like 40. Really, the DIC is only good for testing better/worse.
 
Turbocharged400sbc said:
pull from your AE table if your doing lots of stop and go.
Click to expand...


is this the right area to be working in? if so how much should i back these %"s down to?


master stoich value? is this the commanded air fuel ratio?

not my bin, just one im playin with. lol
dhpfuel_zpsa0660e7c.jpg
 
Sorry man sold my tuner.. went back to stock bin and sold it lol I want to try HP tuners now I like DHP but the lack of support and lack of being able to get on the forum etc plus I've got more information with HP that will teach me instead of trial and error
 
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