You guys are running major HP here. How do you keep the egt's from melting everything? I run level 3 hot juice and get on the freeway and in 4 seconds Im at 1400 F and my box de-fueled. What makes my truck run so hot so quick? How do you guys run a 1/4 mile? My truck would be at 4000 F at the end of a 1/4 mile.

we are really cool guys

so you think my cat/stock muff is causing it?

Sure isn't helping anything other than noise. I have seen temperatures well in excess of what most gauges will read and haven't ever melted anything yet but the high temps were in moderation.

Need to get a bigger exhaust or at least straight pipe,and different intake.From the looks of your sig. you don't have these?

When they start getting out of hand I start moving the probe downstream of the turbo. The hotter it gets the further I move it. Right now my probe is in the 5" tip and it seems to never get over about 1250 deg!http://www.dieselplace.com/forum/smileys/Big Smile.gif





All kidding aside we can only control the temps to an extent. I will see over 1800 degrees in a 1/4 mile pass. Yes it is ridiculous, but that is the way it is right now. We are working on a turbo kit that will change a lot of things for a lot of people. I have seen temp drops of over 500 deg on some of the more extreme applications. I think on a normal truck with a decent power gain we can see 200 deg decrease in temps when the kit is finished.





FYI I do not condone the abuse of extreme egt's that I mentioned above.








Quad





For now with what you have a 4" exhaust would do wonders for you. An intake will help, but only if you make the mods needed to make more boost. With the combo most trucks see 150-200 deg drops.

Okay I took everyones advise and moved my EGT probe out by the mirror temp sensor. Im running a cool 67f now at any speed.

Thanks guys.......

I've heard that propane really helps too..........

I've heard that propane really helps too..........


I would like to hear the theory behind this?

I've seen this many places too. IIRC companies that make the kits claim a more efficiant burn resulting in lower EGTs...Maybe one of these big shots with the Power Shot can share their observations...

Here's my theory on it.


Increased timing (on a stock truck) decreases EGTs, all else being equal. Quad would know better than me.


Propane is a fuel and burns well with diesel, almost like a catalyst so I've been told. Since it's coming in with the air and is already there as the piston is rising, it is advancing the timing as a side effect. There might also be a very slight cooling effect from the expanding vapor. It is also spooling the turbo up quicker and this helps get more air in there, helping to burn the extra fuel.


It's advertised as adding 100hp and I saw 98rwhp on mine. I tow somewhere around 12,000lbs up some steep grades and if I turn it on, I see as much as 50 -100* drop in EGT over stock, in addition to the extra 98hp. I don't think any of the boxes/tuners can add 100hp and drop EGTs at the same time while towing like that uphill.


Considering all of that, I'd listen closely for any detonation if one were to stack propane on top of a timing box. I've heard that posted somewhere, and it makes sense to me, since the tuner didn't account for the free flowing propane advancing the timing on top of the box.

It is pretty simple. The higher the EGT, the more unburned fuel exiting the exhaust. The more timing you add, the more time the fuel has to burn and the less unburned fuel and less heat. Add anything that adds more oxygen to the mix and you get less EGT. That includes O2 injection, NO2 injection and propane.





Jess