should i advance my timing more?

[S14tat]

i have my jwt running at 15 degrees then advances to 18 degrees by redline running 1 bar on a T04E.

i'm not too impressed with the results but by using the the .75 degree per psi rule, i am actually right around where i should be.

i remember orion advancing his base timing by 2 degrees to get better results. i am running a very similar setup as him but my car does not feel like a 300whp car. do you think its okay to run the .5 degree per psi rule?

if that is the case and timing is 28 degrees at wot with the n/a map. running the .5 degree per psi rule, i should be in 20.75 degrees which means i'm almost 3 degrees too low.

what do you guys think?

[DammitBobby]

You don`t need to retard your base timing that is why you have the JWT ECU. You should be using stock base timing 20 degrees as the minimum.

[Structure240sx]

he is not saying to retard his timing

he is asking to advance it to get away from the conservative timing.

i think you should get on a dyno before anything tat. instead of going by feel

[S14tat]

haha i just raced my buddy's evo with bolt on's and we were dead even and all he has is a full turbo back, no cats, and running 21 psi. ( from a roll )

[nissanfanatic]

Quote »i think you should get on a dyno before anything tat. instead of going by feel[/quote]That is exactly what I said. I do think that he needs more timing, but to just go out and advance/then go feel if there is a difference isn't such a good idea...

Another thing that just came to mind is that orion picked up his ECU a long time before you did. So they may have made changes since then...

[Structure240sx]

we put my techtom on his car one day to find the timing out

if you were dead even with that evo, doesnt it make sense? wouldnt something like that run low 13's easy? i didnt quite grasp it when you told me on the phone today

[GEO]

21 degrees timing for life!

[:: orion ::]

My base timing IS at ~22 BTDC...my ECU reads:

~14-15 degrees with any stab of the throttle, sits there until TQ peak...

Jumps up one degree at ~4500rpm...

Then I usually get one more degree by redline...so 16-17.

I think that 19 degrees total timing is OK for 12psi, so I advanced the base to 22. Feels more lively out of boost, and definitley more midrange...2 degrees makes a HUGE diference.

For ~14-15psi, I'd drop it back to 20*...but for now, 22 it is.

- Brian

[S14tat]

so basically i'm right where i should be. also anthony i just feel that if i was making anything near nissanfanatic or orion i should rape that evo from a roll since they're not that strong from a roll.

i know different setups matters but for me to run 4.5 more psi and still potential run slower then nissanfanatic is alittle weird.

[nissanfanatic]

Well now it wouldn't be that weird considering my manifold/turbo combo. No matter what, compressor maps clearly shows that the 50trim is much better suited for the KA than the 60trim. And I now run a really kick-*** manifold. NTM I use a tangenal turbine housing as opposed to the on center.

I still say the only way to find out what timing to run is to tune on the dyno off of the torque curve.

[S14tat]

another thing i noticed today was that by using the safc, i'm lookin at the tps voltage and its only reading 3.8 volts. isn't it suppose to be reading 5 volts at wot? i'm gonna try to check if the safc is out of calibration or not but it shows that i have 90% throttle percentage when i'm flooring it and it goes at high as 95% when i stomp on the pedal.

anyone have any ideas if the car is at 89-95% throttle opening would the ecu consider that to be wide open throttle and go into open loop mode?

[nissanfanatic]

Is it adjusted right for 0% throttle(.5v)? And is your throttle cable positioned/adjusted right?

[S14tat]

yeah i just adjusted it tonight and no difference, infact its reading less now. i manually just opened the butterfly and cracked it all the way it still only registered 100% once. then all i'm getting now is 85% no matter what.

[duncan351]

yeah i just adjusted it tonight and no difference, infact its reading less now. i manually just opened the butterfly and cracked it all the way it still only registered 100% once. then all i'm getting now is 85% no matter what.

Tat, that's your problem. The TPS makes a big difference in performance and gas milage. Go pick up a new one and adjust it. Should be around .42-.44 volts closed and 5v WOT. This will make a huge difference. I would focus on your engine man. I aggree with you that you should be owning that EVO. I do all the time with even less boost than what you're running.