ok so i have a G EMU and the stock timing is
31 advance till 8k
27 advance till 8300
24 advance till 9k
i want to know what you guys run for total timing and how much psi.
also read some of the NOS users running 75 shots do not adjust timing at all.
i will be tuning on a dyno,currently set at -.5 degrees per pound of boost

 

You aren't going to get any good replies to your question I assure you. There is no "set" timing for any specific setup and it all depends on the engine management you're running.

 

^ Correct.

If you have to ask the question you are asking you shouldn't be making the adjustments or you're putting your motor at risk.

 

If you are tuning on a dyno it wont be too hard to set up timing.
I dont know what kit you are running, but you want to start out conservatively.
Make sure you have your AFRs close to where you want them to be
I would set it less then 20* for most of the WOT section when you start building boost.
Do your pull. If you see any know major knock or lean conditions let off and add fuel/retard timing to that section. You shouldnt see much if any if with timing retarded this much.
Start going through and adding timing until you stop gaining torque. If you keep gaining torque but also start getting knock back it off a couple of degrees and leave it there, that about as good as youre going to get it.
This is how I was taught and do it. A lot of people will tell you to keep adding timing until you get knock then back it off. I dont like this approach and feel its a little more dangerous. Reason being if you are making the most torque at say 18* and you are getting knock at 26* so you back it off to 24*. Now you only have a 2* safety net instead of 8* safety net.

Good luck and we all had to start somewhere with questions.

 

I agree with 1slowsi, i safely push mine but its around -0.5 per psi of boost, a little more retarded uptop but its fruitless trying to tell you what to set it to.

Get it on a dyno and set it, you will if the torque drops off/power and also using a knock sensor setup.

 

I was taught that timing should climb to redline at wot. Not peak then drop. Also I would pull 1.25 per psi of boost and then start to climb from there. I run 14 psi and my map runs 14 degrees at peak rpm peak boost. Pump gas

 

Yeah mine is linear but slightly more retarded right at the very top, especially when pistons speeds are mental and theres a lot of heat.

 

It really depends on what fuel you are running. If you are not knock limited then you will always tune to MBT. If you are knock limited then you will not reach MBT but instead tune for knock and then back down a couple degrees or more. If you are on race gas or e85, you won't be knock limited.

As for timing goes, it typically requires more as you increase in the rpm band. You'll want to stay low on the timing in the midrange/peak tq area and then start advancing timing.

Again, all of what we tell you will mean absolutely nothing if you don't have a very good understanding of tuning and how combustion works etc. I recommend taking an efi class to start and practice afterwards. That class will teach you what you need to know to "start". Tuners on this forum are good because of training and experience with many cars along with trial and error. Every car needs to be treated different so don't copy and paste someone's recommendation into your ecu and think its safe. I hope this helps.

 

thank you of the helpful response.im running a supercharger so the timing will be different then a turbo.im running about 19 degrees from 8k to 9k.just found it odd how the nitrous guys(75 shot) and stock supercharged guys dont need to change timing.

 

Stock sc should retard timing really I've found there is power to be gained.