New gauge NIGHTMARES
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Tuned
Joined: May 2003
Posts: 303
Likes: 2
From: Kentucky
New gauge NIGHTMARES
Man, These gauges are an eye opener. I cannot believe how fast my exhaust temps go up under WOT. I can easily see 1450 almost 1500 before mine gets into high gear. I can almost use it as a speedometer. 50 mph 500 degs, and so on. boost is about 24lbs and I have the 85hp tune in. This does'nt seen normal to me, how about anyone else? 
Posting Guru
Joined: Feb 2004
Posts: 2,248
Likes: 1
From: Elverson, PA
Yep - I'm running about the same kind of temperatures when I do a full throttle 1/4 mile run. Nice huh?? If you're gonna be doing it very often - I'd defintely recomend looking into water/meth.
Fleet Mechanic
Joined: Feb 2004
Posts: 1,816
Likes: 3
From: River Valley AR
Some of the guys here are using the water/meth and they love it. I have not used it personally so I can only tell you what I've heard. I've heard of mixes from 80/20 to 50/50. Usually 5 gallons or less on board, and it can be used in stages. I really don't know of any downside to it. If you wanted to start a new thread about it you could get much more info than you could from me.
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Posting Guru
Joined: Feb 2004
Posts: 2,248
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From: Elverson, PA
The only down sides that I have heard of is that if you're already close to max boost levels - it can be the finishing touch to your headgaskets. It raises boost #'s by about 3-4 psi. Also - if you inject too much - or just at too low a boost level - you can do some damage.
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FTE Leadership Emeritus
Joined: May 2001
Posts: 13,653
Likes: 6
From: Cabot, Arkansas
Originally Posted by FoMoCo136
Man, These gauges are an eye opener. I cannot believe how fast my exhaust temps go up under WOT. I can easily see 1450 almost 1500 before mine gets into high gear. I can almost use it as a speedometer. 50 mph 500 degs, and so on. boost is about 24lbs and I have the 85hp tune in. This does'nt seen normal to me, how about anyone else?
There are several little things you can do t help control the EGT's. You can disable the wastegate to add a few pounds of boost. You can also delete the exhaust backpressure valve, the intake air heater and the muffler. Those mods will get you down around 1300 at WOT and you've spent less that $50 total. For about $500 you can add the water injection and another $1600 will get you a ball bearing turbo. Either of those will be good for around 200 degrees reduction.
I've done everything I just listed and I can keep the pedal to the mat forever and never see 1200 degrees.
FTE Leadership Emeritus
Joined: May 2001
Posts: 13,653
Likes: 6
From: Cabot, Arkansas
I doubt the impeller ever gets anywhere near that hot since it's always drawing outside air in. Probably never gets much over a couple hundred degrees.....of course, that's an assumption.
Senior User
Joined: Apr 2002
Posts: 467
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From: On the farm near Loveland
Originally Posted by Jlower
One thing I've got to ask; With aluminums melting point at 1220.58F how long can the turbo impeller be exposed to these temps before softening and reaching fluidity? 
1,500 degrees isn't a serious short-term issue for the material it's
made out of, you burn the seals and bearings in the turbo first.