Safe Exhaust Gas Temperature Egt

[DVS JEZ]

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

[rob82]

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.

[DVS JEZ]

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

[VB-]

if your motors not serious enough for individual trims, i'd probly just tune it for your specific A:F target and not worry about EGT's...

whats your setup consist of?

[DVS JEZ]

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

[VB-]

i wouldnt worry... just go for your target A:F ratio, EGT's should be fine at that power level... anyone feel free to jump in and correct me here

[urtwhistle]

If I remember correctly the max is about 650deg for unleaded. you will have much more luck on this kind of info if you haunt the ANDRAA drag racing forums. Alot of drag cars are tuned via EGT instead of AFR.

[DVS JEZ]

Thanks guys ill check out the ANDRA forums tonight

[PM-R33]

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.

[DVS JEZ]

is that at the manifold runner, rear housing or dump pipe?

[PM-R33]

Dump pipe.

[DVS JEZ]

thats good to hear, i will keep that figure in mind

[urtwhistle]

Id love to have had my pyro setup last time I did a burn out because when I popped the bonnet about 2 mins later the exhaust housing was still glowing. I put mine about 50mm back from the turbo housing on the dump pipe.

[JonnoHR31]

my standard turbo and manifold used to glow after a thrashing, pretty normal

[GTRsean]

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

[DVS JEZ]

Thats some crazy numbers guys. My pyro is on the way.

[Don Dada]

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

[DVS JEZ]

I read ur post before i started the topic. I dont think many ppl on here have much experience with egts.

I have a wideband too and i use it to tune.

[Deano 1]

go on the patrol 4x4 forums Jez, they got heaps of info on EGT's, it would be diffrent temps for a TDi Patrol but still same concept.

[urtwhistle]

what pyro's did you guys get?

I got the following and the amplifier so I could datalog the out put with my FC Hako

http://www.exhaustgas.com/ProductDetail.as...=&BasketID=

http://www.exhaustgas.com/ProductDetail.as...=&BasketID=