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interested in what a "safe" range for exhaust gas temp is?

im running internally stock rb26 and about to start tuning it on E85, i would like to know what safe EGTs are for BP98 and also E85.

when i say EGT's i mean at the dump pipe or rear housings. as getting to the rb26 manifold runners is near impossible.

cheers

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interested in what a "safe" range for exhaust gas temp is?

im running internally stock rb26 and about to start tuning it on E85, i would like to know what safe EGTs are for BP98 and also E85.

when i say EGT's i mean at the dump pipe or rear housings. as getting to the rb26 manifold runners is near impossible.

cheers

No one is going to be able to give you that information as its so dependant upon location and calibration. What I would try is to start on the richer side and progressivly remove enrichment until the percentage enrichment vs percentage EGT gain starts to increase rapidly. You will most likely find that going from say 10:1 to 10.5:1 will do little compared to 12:1 to 12.5:1. I would do the same on E85.

There is no exact science as you have no real way of monitoring individual cylinders. This is where Ion sensing coils really help.

ok thanks, what are Ion sensing coils? they sound expensive.

im not really interested in individual cylinders so much i can check this and compare to the other cylinders, But im more interested in a max EGT before a turbo dies or a piston melts etc

what are a common ballpark EGT for 98 octane fuel, surely there has to be a ballpark, say 1000 degrees max

N1 turboes, stock internals with adj cam gears, 3.5 exh, tomei 600cc, walbro and power fc and cooling mods.

Currently ive tuned it to 293kw on 18psi afr aimed around 11.5WOT as the car hits the circuit a bit.

Ill be running e85 and just want to have a ball park on EGTs for when i tune it. Just thought there was a common EGT range to look out for

Well i'll put it this way. I don't think I have ever seen above 900 degrees on WOT through all gears on BP98.

BP 98 I have seen 890 degs C WOT, sensor in rear dump pipe (v spec), tuned. Mate was like OMG lolz

Ill be running e85 and just want to have a ball park on EGTs for when i tune it. Just thought there was a common EGT range to look out for

Yea...i asked a similar question a while back and didnt get any definite ans....

I'll be using water/meth injection though and already have a wideband installed for tuning

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