Probably have a boost leak.

 

What "60mm upgrade" did you do? What exhaust housing was it mounted to? I ask since a larger wheel on a laggy 21cm housing is just gonna add more lag.

 

His truck has an 18.5 cm exaust housing.

 

most often the 60 comp wheel is teamed with a 14-16cm housing and thats for 400hp trucks. I doubt an 18.5 is going to help it lite.

 

He has a tuned pump. shouldn't have a problem spooling it. SmokinAce is spooling an arora 5000 with pods and a tuned pump. First gens have some guts.

 

I have the banks housing 16cm I think. The turbo spools good and is not unusually laggy in any way. I am runnig About 5lbs of boost at cruise where i used to run 1lbs and I was hitting 22lbs of boost max and now I am hitting 28lbs. My pump is only turned up mildly and before the gds 60mm compressor install I was hitting 1150* WOT towing Now I am hitting 1300 at 1/4 throttle towing! WTF I thought this was supposed to lower egt's? But the truck runs great if I am not towing.

 

did you adjust the pump to the new boost level? you may simply be throwing a bunch more fuel in with the added boost.

 

I guess I am asking did I choose my parts unwisly or is there something wrong and if so what? The turbo is moving a lot of air and getting into the engine.

 

How much are you towing?

 

We cant be bickering when my truck is not right the whole forum should stop and help!!!!!lol
I was only towing my 24'gn lowboy rougly 3500 lbs. I cant imagine what it would do with my 10k cab tractor on it!!!! And like I said before I was not having any trouble towing untill I did the 60mm compressor wheel.

 

All right I did some cleanup in this thread. If you can't play well with others. Go stand in the corner.


48KW. I have seen another member with the same issues your talking about. Pull your grille and run a straight tube in place of that Banks IC. Then post back your results.

 

Try turning your fuel down and see what happens. Does your truck have significantly more power than before the change?

 

Yes the 60mm wheel made my truck pull much harder. Yes I tried turning my fuel down to cut the power back and it qiut getting hot once I turned it down far enough to make it slow!

 

Also make sure you got the nut on the comp wheel tight.

 

I torqued the nut to 150 inlbs.

 

Read this link. This is a problem a member had with a Banks intercooler on his nonIC turned up engine.

I would be doing a pypass test on that IC before I got carried away doing much else.

http://www.cumminsforum.com/forum/89-93-powertrain/55938-boost-increase-expected-h1c-hx35-swap.html

 

I had the banks intercooler on my 89 and it limited the cfm's to around 22 pounds no matter what fuel I put to it. I ended up installing a powerstroke intercooler and a S300G turbo to get my truck where it goes nice. I don't understand why your having egt issues now, when you were not before. It should not be hotter with a better turbo wheel on it when you kept the fuel settings the same. It also should not really make the truck run very hot on the coolant unless you were running high egt's for a long time and the block got heat soaked. I run a 60 gds in my 93 with a 16cm housing and at 300 hp its not really a good setup. I can hit over 1500 degrees empty. When I do tow I can only keep 18 to 20 pounds of boost before it gets over the happy 1250 degree mark.

 

I am not having any trouble getting 28 to 30 lbs of boost at my intake elbow. I guess the intercooler could be resticting the cfm but not so much pressure but I am not having any smoking issues at all with the 60mm compressor.

 

It does begin to sound like your intercooler may be the problem specially when pulling a little more than normal.

Water-meth injection may help some but It sounds like you need to pass more air when your engine starts to develop real power.

Do turn your fuel down for now and perhaps experiment with it to find a temporary happy medium.

 

For now I just put the 50mm compressor back on untill I figure out what i am going to do. The intercooler would make since for making my a/c suck and my engine hot!!!

 

I'll be interested to see if that cools it down or if your Tstat went bad.

 

nope with the 50 back in she is back to her sweet old self!
The only 2 hypothisis I can see is 1: as stated in this thread massive restriction in the intercooler due to operating it out of its design peramiters is super heating my charge air before it enters the cumbustion chamber causing high cumbustion temps. OR 2: the massive amount of extra air my engine is reciving is raising cumbustion pressures above the abilities of my cylinders and rings cuasing alot of blowby which would generate a significant amount of heat( this theory would also explain the hot oil smell that I was getting trying to tow with the 60mm wheel). After all my truck does have a unkown number of miles on it odo only goes to 99,999 you know.

 

Carl, would the egt and ect be together in that excessive egt would raise ect? Is it possible that it could be a lean condition? Please excuse my ignorance just wondering if a diesel would have the same hi head temp with a lean burn. Had a issue like that on a gasser but not sure if the same thinking applies in this case. :confused013:
Curt

 

diesel is a low heat fuel. It takes fuel to make heat, leaned burns cooler unless you cant spin the turbo, but he said he has 28psi so it must be spinning.
sustained higher EGTs will tax the cooling system beyond its abilities. thats why tow rigs are often limited to 450hp. its not a matter of power but heat.
but the opposite is also true, if the coolant (motor) is hot, so are the EGTs as the engine is unable to cool the combustion chamber between cycles.

 

Take a stick and poke the raccoon nest out of yer intercooler... fix it right up...

 

kind of off subject but i'm hoping someone can help, does it matter where on the exhaust manifold I tied my egt probe in?? I put it between two cylinder discharges close to the final outlet but couldn't really get to anywhere else to do it? Should I try to put it on the final discharge of the manifold or is it accurate enough? THANKS!

 

When I had my 6.7l I had my egt probe in my rear egr delete plate and never had a problem. I would probably add 100 to what your gauge says just to be on the safe side but you are probably golden.


On another note the problem turned out to be my intercooler. Banks just didnt design the setup to move that much air. Thanks for all the help!!

 

alright thanks kenworth! highest I've seen pulling a 30' camper up a hill was 1100 so i should be good. Thanks again!