I have a Edge Hot Juice and i am bouncing it off the 1450` high egt set point, should i go higher with the limiter or would i be asking for trouble. the probe is pre turbo on the manifold.

Just turn the EGT backdown off and put duct tape over the pyro portion of the attitude.

Seriously, anybody running one of the big programs is seeing somewhere in the neighborhood of 1800°. It won't hurt anything in the amount of time that it sees those temps.

Seriously, anybody running one of the big programs is seeing somewhere in the neighborhood of 1800°. It won't hurt anything in the amount of time that it sees those temps.

wow i dont think i could bring myself to do that, that is scary high. aluminum melts at 1220`

1650 +/- each pass. I too quit looking at the guage. Towing up mountains is another story. The land is FLAT and boring here though.:)

EGT's...WTF are those???? I ran the Xtreme for months and pounded on it with no gauges...no problems here. I finally installed gauges for towing, but i have seen a max EGT of 1818 when racin

Yes aluminum does melt way under those temps, but the metal itself takes time to heat up to those temps, remember you are measuring the air temp, not the metal temp. The pistons are also cooled with oil. You will be fine running the quarter, not thinking about egt's.

Aluminum melts at lower temps than most think, however it does get rid of it very quickly as well. I heated some thin Aluminum (6061) to 2100+ for 5 mins one day (almost twice the melting temp), and it never even lost its edge. This was square tube aluminum with a 1/16 thick wall. It just dissipated the heat so quick it never was able to start melting. Now think if coolant was running through it or oil was wicking the heat away. These things will take much more abuse than most realize. The steel components don't get rid of the heat so well.

i'm not so much concerned with the pistons as i am with the wheel in the turbo, no cooling there and paper thin material. anyone ever melt the turbo wheel?

The wheel itself is not made of aluminum. You're NOT going to melt it.

The wheel itself is not made of aluminum. You're NOT going to melt it.

what is it made of?

i thought it was aluminum

i think the only aluminum is turbine scroll housing, impellers are high strength steel, garrett if i remember is using ceramic compound to reduce weight and spool speed time. short burst dosn't soak in like pulling load up hill.
hope this helps ya.

what is it made of?

i thought it was aluminum

I believe the impeller is made of inconel. It's the same material used in nuclear reactors. real high nickel percentage. I could be wrong tho.

There is a pic on here of Kyle's manifold @ the Muncie pull last year and the it is GLOWING ORANGE.
So they will take a LOT of heat.
http://www.crankitupdiesel.com/pictures.html

Scroll down near the bottom.

Most compressor wheels are aluminum, although Garrett is using, as Keith_2500hd said, ceramic on some new compressor wheels to reduce weight and decrease turbo lag. The turbine (hot) section wheel is made out of hastalloy which can take verryy high temperatures. The turbine housing is made out of cast iron and the compressor housing is aluminum. From my experience building a Jet Engine out of a huge Detroit Diesel Garrett turbocharger, i know that the turbine wheel can certainly take some heat. During a couple "hot starts" / "hung starts" of the jet engine, the EGT spiked to 2000 degrees! It survived though...

---Ben

Nickel type alloy on the turbine side. Cast aluminum or billet for the compressor wheel, some of the new turbos from certain companies are using titanium for compressor wheels.

What would a Ti compressor wheel buy you other than a lighter wallet? Still pondering going with a Steriod with a Ti or std wheel. Thx

A lighter wheel, which will also allow you to spool up quicker (although the difference would likely be minor).