ok i have done some searching on where to put an egt probe most everyone says to put it on #4 cylinder closest to the battery
my mechanic said that it should go on the #1 cylinder (passengers side) because the fuel comes in from right to left when looking at it so if any cylinder goes lean it would be the last injector on the fuel rail
his 4g63 is on the #4 cylinder farthest on the right because his fuel lines go left to right so that is where his reasoning comes from
any truth to the matter or should i go with putting it on the #4 cylinder
#81846, "RE: egt probe confusion" In response to Reply # 0
You want it to read the exhaust gas temperature after combustion. Best accurate reading is right after the combustion happens and the expent gas is being blown out. This happens in cylinder 4. You want it to pick up reading where it gets the hottest quick.
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#81847, "RE: egt probe confusion" In response to Reply # 1
Originally posted by DSMRoadster You want it to read the exhaust gas temperature after combustion. Best accurate reading is right after the combustion happens and the expent gas is being blown out. This happens in cylinder 4. You want it to pick up reading where it gets the hottest quick.
WTF are you talking about? Jesus V.
it's been shown that #4 is typically the hottest cylinder on a 420A. The fuel from left-to-right thing is a myth for the most part. there is no significant pressure drop within the rail when an injector opens, especially with the size injectors typically used on a 2GNT, and the size pumps we feed them with.
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'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)
#81856, "RE: egt probe confusion" In response to Reply # 6
Its actually copper gasket spray, lol. That was before the motor was started. Its like a powdery gray now. Its kinda like a backyard powdercoating. It works, nothings rusting or lookin ugly, lol. MrSlick gave me that idea.
#81877, "RE: egt probe confusion" In response to Reply # 8 Jan-26-05 08:32 PM by EglTalon_ESi
I bought a half star stage 2 turbo kit from optikal which he bought off melinko (I think that is his name) anyways. The egt probe was install on the dp is that of any use? Since there is a hole drilled there already should I just install the probe there or is it pretty much useless?
#81904, "RE: egt probe confusion" In response to Reply # 2
Originally posted by DarkOne WTF are you talking about? Jesus V. it's been shown that #4 is typically the hottest cylinder on a 420A.
that's what I was trying to say Oh Dark lord. Trust me, what i typed didn't seem to make much sense to me neither, but as long as I got cylinder 4 in there, then it's all good. Oh btw, it would make sense that cylinder 4 is the hottest on our cars since 9 0ut of 10 of us get's that piston blown out or the rings gave way.
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"Tell them of us and say, For their tomorrow, We gave our today." -- The Kohima Epitaph
#81936, "RE: egt probe confusion" In response to Reply # 15
Mine is also in the center. That is were Hahn put it when I told them to tap it for the prob. I wonder what difference in the temp reading this would make from being in the number 4 exhaust runner?
#82041, "RE: egt probe confusion" In response to Reply # 17
I went after the turbo with my egt probe. It even says in the autometer instruction to place 2" after the turbo. It is a option and many have diffrent views on this subject. The the egt is a monitoring device just watch your temps.
#81973, "RE: egt probe confusion" In response to Reply # 16
Originally posted by BOOSTED ECLIPSE Mine is also in the center. That is were Hahn put it when I told them to tap it for the prob. I wonder what difference in the temp reading this would make from being in the number 4 exhaust runner?
The advantage of having it in a specific runner (namely #4 on ours) is to eliminate the "averaging out" effect that happens if you put it in the center or the downpipe.
I don't imagine the difference would be tremedously different, but then again, I've never run both setups. (Mine's in #4) But if there was a cylinder you want to watch, it's that guy.
The best setup, run by Gary Donovan (10 second K-car) is 4 EGT gauges for obvious reasons.
Brian
Red 97 Eclipse GS (420a) MTX Custom Garrett T3 Turbo system Megasquirt w/52 lb/hr injectors & a Walbro 255 Kicker/Alpine Audio (3 amps, 2 subs) 90 Cav 2.2 TBI auto (winter) <- yeah, it's fast
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