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Posted

Ok, I just ordered HP Tuners. I've watched a buddy of mine tune numerous cars, and I know my way around the software. I would like to get some advice before my software comes in. The only part I still need help on is knowing my limits. For example, I have a 2005 GMC Sierra reg cab with a 6.0 HO transplanted into it that I'll be tuning first. It has a K&N CAI and flowmaster muffler. I know I want to up my timing a bit, delete toruqe management, and make my sure my afr is right. So, as far as timing, what is the SAFE limit? What should my afr generally be? Also, when increasing shift line pressure, what is the SAFE maximum there? I know how to use the scanner to log real time data. I do not have a wideband, nor do I plan to buy one. I know they come in handy, but I'm doing basic tuning and don't feel as if I need one. I have heard that many people just copy the high octane table and paste it into the low octance table. In many of the screen shots I've looked at, there is a little box pop up when you put your mouse over something that tells you what it does and minimum and maximum. Can I generally follow those min/max reccommendations? I've heard afr should be around 13-14, is that true? Thank you for any help! I really appreciate it!

Posted

There is a lot more involved in tunning other than max and min safe points in these trucks. and what works for one doesn't necessarly mean it will work for another. I would not touch your timing until you dial in your AFR and coping your high octane spark table to your low is not proper tunning, and can be dangerous. the people who do that are usually in speed density and are tunning their VE table.

 

Tunning with out a wideband is possible, you go by your long term fuel trims but it takes much much longet to do so.

 

and as far as transimission go, it is possible to granade a stock transmission with a stock motor just by playing with the line pressures. but adjust pressure in small increments until you get the dessired firmness.

 

its better to take baby steps and have a good tunning experience as opposed to big steps and loose and engine or trans.

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