I have the MSD Programable DIS-2 box and have been playing around with it latley. Here's my situation. I'm currently running 15psi of boost with 0 degree's of timing retard CUZ, when I try to pull 8 degree's of timing @ 15psi of boost my EGT's wanna sky rocket as in fly past 900 (1652)!! (My EGT's are at 850 (1562) peg'd after a long 4th gear pull with 0 degree's pulled) I'm not sure if it's really Lean or just maybe to much fuel and there's after burn in the exhaust manifold and that's making my EGT's raise. Do EGT's normally raise when timing is pulled?? Or is there some way I might have the DIS-2 hooked up wrong so it's advancing timing?? Is that even possible?? I do know the only way to figure this out for sure it to strap it to a dyno and see what the wideband 02 reads. I don't have any money at the time so I'm looking for all the help I can get
Greg Williamson 1999 Eclipse GS "Sport" (Sold) Star Stage III 12.817 @ 109.36
#13977, "RE: Does pulling timing affect your EGT's??" In response to Reply # 0
Greg,
Assuming you have not changes the fuel maps whatsoever when you pull timing, you are getting afterburn. I had this problem for a while. When you pull the timing the car tends to run rich which leaves unburned fuel in the manifold that will ignite and give inaccurate egt's. You will need to tune again for the timing being pulled.
#13978, "RE: Does pulling timing affect your EGT's??" In response to Reply # 1
Thanks Chris Can anyone else realate to my situation or have any input?? So Will my A/F ratio show my car to running more rich or more lean with afterburn? Or will I blow lots of black smoke?? (I have not looked yet) I need to Dyno tune bad! :'(
Greg Williamson 1999 Eclipse GS "Sport" (Sold) Star Stage III 12.817 @ 109.36
#13979, "RE: Does pulling timing affect your EGT's??" In response to Reply # 2
A/F ratio gauge will show rich. you will blow lots of black smoke.
A.D.P. bring it on............
A.D.P. "...If you do too much, people become dependant. If you do to little, people loose hope. If you do it right, people won't be sure you've done anything at all." bring it on...........
#13980, "RE: Does pulling timing affect your EGT's??" In response to Reply # 3
and it's 8* of timing waaaaay too much to pull at 15psi?
______________________________ If a sentence found online has 35% misspellings or greater and includes at least two racially charged expletives, chances are it is a YouTube comment.
'95 Eclipse TurboGS (garage deco) '95 TSi AWD (restoring a survivor) '97 Talon ESi-T (poor impulse control) '99 Eclipse RS-T (daily beater) '13 Evo X (mostly stock) '17 Sienna (Middle Aged Dad Mobile)
#13981, "RE: Does pulling timing affect your EGT's??" In response to Reply # 4
I'd just confirm those retarded timing numbers on your datalogger for peace of mind. The numbers can't lie. If your timing's pulled more so than "normal" conditions, it's most likely afterburn like Chris is saying.
It's not fair, is it? High temps when your lean and high temps when you're really rich! hehehe
_____________________________________ Jason ESi-T
04' BMW 325Ci 91' Nissan 240SX 98' Eagle Talon ESi (sold)
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