Basically people with EGT gauges i'm interested to know:

Your turbo:
Where the sensor is located:
Celsius or fahrenheit:
What you see on a highway cruise (~70-75mph):
What you see after really getting on it maybe first through third or fourth:
And the highest EGT's youve ever seen in your car:

My answers are:
I havent turboed the S yet but i did turbo my escort. Laugh as you read this but i easily doubled the output of that car with minor bolt on's.. well i guess a turbo isnt minor.. but you get my point.

Your turbo: IHI VF12 (from a subaru legacy JDM spec)
Where the sensor is located: ~12inches from turbo
Celsius or fahrenheit: F
What you see on a highway cruise (~70-75mph): 1200
What you see after really getting on it maybe first through third or fourth: +1500
And the highest EGT's youve ever seen in your car: 1600 (that me though and i didnt notice it was that high at the time.. now the guy who owns it now.. who knows..maybe 1700? anyways ill state the obvious and say that after a good tune they have dropped considerably from what they were on the freeway..)

anyways, input would be appreciated as my buddy just installed a EGT on his 1.8T GTi and he just isntalled a Garret .60 trim t3, just wondering what would be norm.

 

NA Mugen header A/F at 12.1-12.3
DEFI EGT 2" from test pip inlet

820C (1500F) max on the dyno after successive runs (dyno dynamics)
800C (1472F) max ever seen on the road
550C (1022F) light city driving
650-700 (1202-1292) at 75-80 steady on the interstate


Will be going FI in a couple of weeks am interested in seeing how close I can keep my FI EGTs to that of my NA EGT's and still get a good hp/psi ratio

 

WOW... i never would have thought N/A would be so high.. thats nuts! i guess since FI cars have more fuel so it cools the exhaust so that even though there's more power the temps dont really go up...?

anyone know what most exhaust turbines melt at? i would assume +2k F

 

i'd be more worried about valves at those temps!

 

Well that too but assuming that everything was "hypothetically" ok

 

interesting, a quick google of melting points shows 100% aluminum melts at around 1200F. steel melts around 2500F.


http://www.muggyweld.com/melting.html

 

http://www.asciimation.co.nz/turbine/

WOW.. i wish i could sit here and work and read that..

but i was really looking for what exhaust turbines are made from?

ceramic?
Steel-High Carbon?

 

The outside shell of my turbine looks like its made from cast iron (VERY high melting point) but I would assume the fins and shaft are probably made out of some kind of steel.

 

So going by that it would be safe to assume around 2400+ would melt a turbo down.. lol

im curious how well the heat transfers through the center section and the shaft, as aluminum (compressor wheel) has a much lower melting point then all the other parts of the turbo...

 

the shaft can't be aluminum, it has to travel from compressor to turbine housing, so it has to be made to endure enough heat from the turbine housing.