Turbo BS Thread

Quote, "We make the rules, so we know how to break the rules."

 

Lets talk camshafts

I have a set of cams and a head at LCE, and want to get started thinking about custom profiles..

Any input?

 

What's the time frame for a new set, if you ordered tomorrow?

 

649 days

 

Might want to design your own, lol

 

Thats why i am here.. I want to get the design and parameters down, prior to even pushing forward with them with lce. That way, it is "Here, make me these"

lol

 

I also may contact kelford or someone to see what can happen

 

Kelford will definitely do custom grinds. Just need to give them specs and goals.

 

Took roughly two years for comparative dynos, but they are both done and highlighted.

 

note the hole in the hood, you (non cali and other CARB state) guys complaining about space need to pay attention

 

I prefer not getting pulled over.

 

edited

 

Nearly there fellas.

 

I drove around a little bit yesterday after some fuel map tweaking and the afr's are good Idling and cruising they are in the 14.5-15.5 range. As I put the throttle more the afr's go down gradually until WOT they are in the 10's. at 6 psi boost. The only thing is when cruising around the LTFT's are still high. When it's idling they are at 7.00% to 9.00%

 

Sounds a heck of a lot better that in used to be .

 

What is high? If you can get them under 10 I would call it good. Still sounds like you need more fuel.

Also every cell has its own long and short term fuel trim so you need to find out what cell has issues and tune it. What I would do is reset you computer so you lose all trims and drive when you find a lean/rich spot add/subtract fuel. If you keep doing this you will eventually get rid of most of your high/low LTFT/STFT. If you just add/subtract fuel it will work the same but you need to drive it so the ECU will see the lean/rich spots and make adjustments, it will take longer this way.

I explained this to someone before maybe it will help you tune yours

"Some info on STFT and LTFT. You need to think of the stock map as having cells, which Im sure it does, but I would not know what it's axis are. Each cell in the Stock Map would have its own STFT and LTFT. The reason your trims change so fast is you are moving through the cells and each cell has its own set trims. They only change when you are sitting on a cell. Once you sit on a cell long enough it will start to trim it.

So given this info your LTFT at idle will not be your LTFT at cruise, and if you see your LTFT change at cruise it will not effect your idle LTFT. Goes the same for STFT.

This is why you need to drive you truck for many miles and in many conditions before it will learn all the settings it needs to. Every cell has its own trims.

This is also why steady state tuning on a dyno is so important, you can get to every single cell.

LTFT is its own table also. This is used as a modifier to the base table, but is modified by the STFT.

Look at it his way when you get to a certain cell on the base table it will use all the reference sensors to adjust the short term this will then be added with the LTFT and many other tables to the base table for final fueling. When the short term is - or + for a given time it will modify the LTFT table accordingly, this will be saved in said cell for next time you come to it."

To compound the issue more you are adding your AEM fuel table over the Stock Maps. Hope this helps.

 

While everyone has this in mind... What the heck is wrong with mine?

Basically after i get all the way up to temp, this is what it does at idle, red lights, stop signs, trains etc afrs sometimes peg out to 18.15 and my truck says "i hate you"

I do have a cel for a rich o2 sensor, i may clear the code and try and lean out the tune some so it doesnt throw it again but is that all thats wrong? Stock ecu thinks its running rich so it pulls fuel?