PLEASE HELP! HIGH EGT'S!
 

Anybody know why my egt's are 1000-1350* while towing the toy hauler, OD is OFF. The tralier is about 10,000#. With a free flowing exhaust and tymar, and adrenaline, something is not right! Please help before I go :notallthere:. BTW, this is using my heavy tow tune.

my trucks all run 1000 to 1350* EGT while pulling heavy on hot days, except my 2000 F550 after I put 90cc single shot injectors in it, now it have a hard time getting 1150* EGT. With the stock split shots it would get to 1400* EGT, with a 4" turbo back and a 6637 intake.

Is your '97 a California model? dose it have split shots? IMHO split shot make hotter EGTs then singles

hi EGTs isn't that what piston coolers are for??:giggle:

Have you checked for boost or exhaust leaks yet?

Nothing is loose or obvious as far as either go. Since I have no cooler, the only boost leaks would be from the y pipe into the motor, right? As far as exhaust leaks, is there way to check besides looking and listening?

Boost leaks can include the turbo outlet o-ring, intake boots, intake manifolds or any combination of the three.

Looking for the exhaust leak is the easiest way to tell, you will see the soot around the problem area.

What are your boost #'s when EGT's are high?

Good Luck

About 10-12psi @ 2000-2250rpm.

Hmmm.......seems low to me.

Do you got leaking up pipes?

Don't see any leaks on the exhaust side. Everything is tight on the boost side. Talked to a "turbo" guy, he said the boost #'s that I am seeing are low and the turbo wheels could be worn, which could be the higher than wanted egts. Does this sound right?

Do you have any laterial movementin the turbo?

Yes, there is a little play. The fins do not appear to be bent or damaged. The truck had a k&n on it for at least 60,000mi. I put the tymar on it when I discovered how bad they are for a diesel. Not having seen a new wheel, I have no reference if it is "dusted".

I'm not familiar with the OBS's, but if you can't find any boost leaks and your only making about 10-12 lbs. of boost, do you think your wastegate is opening up to early or do the OBS have a wastegate since there a bigger exhaust housing then the SD's?
My other truck I had, the wastegate was weak and wouldn't only make about 5 to 7 lbs. less boost then should of b/c of the it opening. Wouldn't it get hot if it opened to soon and ran there?

The 10-12# of boost was while towing the trailer and the rpm was about 2500. Under no-load conditions WOT, I can hit almost 25psi. Under those conditions, short bursts, not sure what the egt's were.

What was the max boost you saw while towing?

I don't remember what it hit when it downshifted, but I'm sure it went over 15.