im going to tune my car for a race gas map. i have a mild streetport, t3 1.06 35r, and plan on running 22 psi boost and Q-116. im thinking to change the timing through p15 and n10 up by 2-3 deg. i just want some imput to make sure i am heading in the right direction. here is my map from p15 and n10. have not added any timing yet. this is my street pump gas map.

15 16 16 17 15 15 18 21 22 25 26
12 13 13 14 13 12 14 17 18 20 21
11 12 12 13 12 11 12 15 17 19 20
10 11 11 12 11 10 11 14 16 17 18
9 10 10 11 10 9 10 13 14 15 16
8 8 8 9 8 7 8 11 13 14 14

tried to get a pic of the whole map but couldnt. any imput appreciated.

 

Reading each column vertically it looks ok but now read from left to right (horizontally) and from upper left to lower right (diagonally). Does that look like a smooth progression or jumping up and down?

Also read the "advancing timing at high rpm" thread in the single turbo FAQ

 

Here is what I have for that region of the map, 60-1 turbo (a little smaller than a GT35) at 19psi on race fuel with the 8.5:1 series 4 rotors. Note that my P rows have been rescaled for higher boost and are evenly spaced unlike the stock Apexi map. This map is a work in progress. Remember too that the slower your car builds boost, the more it will run diagonally between cells as it spools, which can make the curve erratic if you aren't careful how you shape the progression. As a counterexample, a car with stock sequential twins will mostly progress vertically until max boost is reached (because it spools so fast) and then horizontally as rpms rise. Datalog a high boost run and run a graph of leading ignition, you'll see what I mean.

21 18 18 18 18 18 19 21 23 23 23
16 15 15 15 15 15 15 17 19 19 19
14 13 13 13 13 13 13 16 17 17 17
12 12 12 12 12 12 12 14 15 16 16
11 10 10 10 10 10 10 12 13 15 15
10 9 9 9 9 9 9 11 12 13 13

 

ok i spend way too much time on my car and this forum lately...

comparing your map and mine again, it just looks like you have sharper dips in it presumably around torque peak, than mine, which is a more gradual curve. I suppose it would just depend on what the engine likes and what cells the car falls in when you boost it.

 

thanks for the imput guys,

arghx, i would figure your timing on race fuel to be more advanced. i see how it is more consistant compared to mine. but i raise timing after peak tq. the only thing on your map i notice different is how retarted it is. i was planning on advanceing my a few deg. all around. any reason for the low timing?

 

Well here is a pic of the whole thing (I used a freeware program called screenprint to take the shot). The P rows have been rescaled and peak boost is a little higher on the map. So it's not as conservative as it would be on the Apex'i map's P rows. I am going to wait until I can get some solid dyno time before I decide whether to advance it further. It is significantly advanced in some of the low boost areas and has some advance after peak torque, but I am trying to be careful with the motor right now in the peak motor blowage/torque area. I can't afford another motor, especially since the series 4 motors are prone to cracking irons. The car budget is tight. Also I am only running 106 unleaded currently, not C16, which I believe makes a difference.

 

ok i see yes it is scaled different yourmap looks pretty good overall. i have been adjusting mine latly. ill pull it up and download that screenprint to post a pic of my map. i plan on running Q-16 so i think my timing is still a little too retarded. will have it up in a bit.

 

here is a shot of my base setup for race fuel.

 

not to go off topic but i dont think you need a freeware program to take a screen shot just hit the "prt scr" (print screen) button to take a pic of your whole screen or hit alt + prt scr to take a pic of whatever box is selected.

Then you have to paste it into paint or a photo editor program and save as jpg. easy

 

arghx - how did you get your N rows to show RPM? Is that how the stock scaling is setup? in 400 rpm increments? does that mean you cant tune for 8500 rpm or higher? or will it use the same settings from 8000? sorry to disrupt the main topic.

 

I think your timing is advanved enough. You don't need a lot of timing on a boosted rotary to make power. The only way to tell what your motor will make power with it to put it on the dyno and make incremental changes. That being said it is possible to gain 3-4 hp by advancing it 2 deg before and after peak torque.

 

nvm i found the setting to change it. but im still curious how tuning is effected after 8000 rpms

 

I didnt know you could even change the "N" and "P" rows heading...

 

lol yeah i didnt either. i like it better. you can switch between easily too. just go to setup > maps > map ref labels and check it on.