| RE:Been doing some tuning... |
Subject: RE:Been doing some tuning... by CasetheCorvetteman on 2007/9/4 7:04:55 Quote: There is a great book out there, called "Corvette Fuel Injection and Electronic Ignition: 1982-2001," by Charles Probst. It's a great primer on how this works. I havent seen that book over here anywhere, but ive heard its reasonably good  Quote: My only thought... if you can make the EGR work, it will help... it does one thing via another thing (follow that logic :thumbright: ). Not possible, cause most of the stuff is missing. I wouldnt hook it back up even if i could though, the cam has more than enough overlap to take care of EGR. Quote: The transmission is turned for MPG (which, by extention means emissions). Mess with it too much and your economy will go right out the window!!! I know gas is pricy in Oz, so you might want to go easy there... but I see your point. ? But the tuning is totally unsuitable for a modded engine, and it will actually use more fuel due to labouring in a higher gear. I have the shift points set low enough at lower TPS%s, but ive smoothed out the tables alot (which from the factory, look like a dog's breakfast) Trying to push a higher gear takes more effort, which takes more throttle, and more fuel. Ive managed to improve the "around town" fuel economy by setting the trans up to select the right gear for the given situation, and based on my engine's characteristics. When cruising slowly, i have it setup to select the highest gear it can push without labouring. As an example, if im cruising along at 60kph and want to accelerate to 75kph, factory settings would hold it in forth until my foot was near the floor, and it would labour its arse off and accelerate like a slug, and if i pushed my foot down far enough to make it shift down, i would get such a sudden rush of power and the car would take off like a rocket when i didnt want it to do so. I will dig up some pictures of shift tables and post them up for ya to look at so you can see what ive done with them, i have a stock .bin file here and i think it has it's stock shift points on it (although i know they are scaled down for a ratio change) Quote: Very interesting stuff! Have you found a dyno to test it on? No mate i havent been able to yet, i know of a few around, but havent had a chance. Ive been running Data Master most days lately though and i take notice of everything that is going on there, especially in relation to what effects my changes have made. Fuel isnt cheap over here, not much more then there, but its not a real big deal, the car is quite economical really considering the power its got. I certainly want to enjoy the car my way though, and sometimes ecomomy just has to take a number and stand in line!!   |
