Anyone want to test a tune on thier car?

[blu3man]

Been running this for a while now. Been through several supersprints with no splosions.

Tune is for a stock as rock SR20 blacktop t25 turbo (180sx blacktop... so... its really a redtop, no vvt).

I have tested this with a boost tap up to 10 psi.

Want to see if someone would be willing to hook this up to thier car and tell me what they think.

I'm going to tweak it soon to see if i can safely get more mid/early response (had a few problems last time).

[TM_S13]

do you have any logs of a pull with that tune ?
specially with AFR feedback...

[johnus]

fuel map is very rich ,do your afr readings closely follow your target afr's on your map? I have a stock SR20det in a s14a so i have VVT .My afr's follow my map pretty much spot on and i have been aiming for about 11.00-11.5 at WOT , i also keep it nice and lean untill it starts to make boost. Would be interesting to see a log of your afr's

[blu3man]

My afrs pull quickly away from the map. I end up at around 11 at max boost.

My wideband cant log to nistune..... yet..... (apparently i can get some usb thing)

[johnus]

This is my tune ,standard sr20det in an s14a running 95ron fuel
front mount intercooler
2 1/2" exhaust with decats
boost controll set to 14psi
induction kit

[blu3man]

Think my afrs wont match that table due to dying injectors?

I'm impressed by your timings.

[johnus]

Think my afrs wont match that table due to dying injectors?

I'm impressed by your timings.

I've looked at standard S13 sr20 maps and they all seem to run very rich .Noticed that the Kconstant is alot lower on s13 compared with s14 are they smaller injectors? s14 are 370cc
I like running 40+ timing at low load for the torque it gives + better fuel economy. The timing map is based on pl's map featured in timing advice thread but with timing pulled out at 3650 rpm due to knock

[blu3man]

Very very interesting.

S14 and s13 injectors are both 370 cc as far as im aware.

(i noticed your K was much higher then mine)

I might try changing my K to something closer to yours next time i tune.

[johnus]

Very very interesting.

S14 and s13 injectors are both 370 cc as far as im aware.

(i noticed your K was much higher then mine)

I might try changing my K to something closer to yours next time i tune.

Thats what i was thinking it would explain why afr's drift off as load increases ,worth a try IMO

[nissangts]

Hey guys I believe your Ks are different because of the different AFMs.

[johnus]

arrr thaught they were the same as they both have a 290bhp rating

[blu3man]

Im pretty sure they use the same AFMs...

Im going to try matching my injector values to your tomorow to see what happens....

[johnus]

Im pretty sure they use the same AFMs...

Im going to try matching my injector values to your tomorow to see what happens....

Carefully does it tho ,up it a few thousand at a time and if it does start to match your map it will go very rich quickly. Just makes me wonder why nissan would map it like this .Maybe some other S13 sr20det users would give us their opinions/experiences. I've seen s13 tunes with bigger injectors and z32 afm and their fuel maps are what you would expect to see as kconstant has been tweeked to follow map

[nissangts]

Nope they are not. S14det and s13det have different AFM. The s14det shares the same AFM with the GTi-R pulsar, U13det, Avenir Det and the S15 Det. S13 is different mate. That's why their K values are different.

Im pretty sure they use the same AFMs...

Im going to try matching my injector values to your tomorow to see what happens....