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Discussion Starter #1
Just installed the irate t4 kit with the s366sxe. I was wondering what everybody else is running egt wise. Running down the highway about 70 not pulling seeing about 750, but once i hook on to anything my egts sky rocket quickly to over 1200. I never let it get over 1200, but should i be seeing temps that high with this turbo? Top boost is about 28psi and i dont see anything register on the guage untill i get to about 40mph.


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What injectors and other mods are you running? Also, any tuning done to it?

Also, I am assuming you are using a different air filter than the one pictured? Doesn't look like that one is sealing too well ;)
 

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Discussion Starter #3
What injectors and other mods are you running? Also, any tuning done to it?

Also, I am assuming you are using a different air filter than the one pictured? Doesn't look like that one is sealing too well ;)
Still running stock injectors, all mods consist off 4 in turbo back exhaust, and a dp tuner, and ya that was my old airaid intake filter had to order a 6637 filter

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Discussion Starter #4
Ok this is a list of all mods done to the truck.
-4in mbrp exhaust turbo back.
-Auto meter guages-trans, boost, egts.
-Tunes- f6 dp tuner.
-CCV reroute to vent to atmosphere.
-T4 irate conversion with an s366sxe turbo.
-Napa 6637 intake filter.


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You have got to have some serious pre turbo exhaust leaks or a bad boost leak. My setup is comparable to yours and i very rarely see egts over 1200 degrees even when towing in hot weather.

You should put a boost leak detector on and see what you can find. Also look for leaks around your exhaust manifolds, up pipes, and collector where it mounts to the turbo.
 

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You have got to have some serious pre turbo exhaust leaks or a bad boost leak. My setup is comparable to yours and i very rarely see egts over 1200 degrees even when towing in hot weather.

You should put a boost leak detector on and see what you can find. Also look for leaks around your exhaust manifolds, up pipes, and collector where it mounts to the turbo.
:whs:

Also, what exhaust housing are you running with the S366SXE?
 

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Discussion Starter #7
Might have found the issue, one of the bolts from the collector to the turbo somehow worked its self lose. Im not seeing any soot is the only thing that still has me wondering if thats it. Justin, my housing is a, 0.91AR T4 Turbine Housing.

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That's the same housing I have. You should not have any egt issues with your setup. Something is definitely not right.

I highly recommend a boost leak detector. Mine has helped me many times. They are easy to make.
 

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Discussion Starter #9
Here is some pictures, starting to think its a bad gasket possible.


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Try running the truck first thing in the morning when its somewhat cold and look for exhaust leaks. Use a mirror and look for smoke around the collector and up pipes.

Its still a good idea to use a boost leak detector to make sure you don't have any boost leaks. Every time I pull my intercooler plumbing apart I use mine to make sure I got everything sealed up good. I always seem to find a small leak around a clamp or something. I can't say enough about the boost leak detector besides get one and use it. I can almost guarantee you will find atleast 1 boost leak.
 
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Discussion Starter #11
Try running the truck first thing in the morning when its somewhat cold and look for exhaust leaks. Use a mirror and look for smoke around the collector and up pipes.

Its still a good idea to use a boost leak detector to make sure you don't have any boost leaks. Every time I pull my intercooler plumbing apart I use mine to make sure I got everything sealed up good. I always seem to find a small leak around a clamp or something. I can't say enough about the boost leak detector besides get one and use it. I can almost guarantee you will find atleast 1 boost leak.
Can i still do a boost test with the ccv reroute since its not a closed system?

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Yes, you will hook the leak detector deal into the intake tube before the turbo and pressurize it to around 10 to 15 psi. You don't want the ccv hooked into the intake tube. You don't want to pressurized the ccv. Hope that makes sense.

If you had the stock intake tube you would hook the leak detector into the short rubber tube that attached to the turbo and bypass the ccv.
 
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I would pressure it up to 20-25. Then spray everything down with soapy water.

You do not want to pressure up the ccv
 

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Might have found the issue, one of the bolts from the collector to the turbo somehow worked its self lose. Im not seeing any soot is the only thing that still has me wondering if thats it. Justin, my housing is a, 0.91AR T4 Turbine Housing.

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The S366SXE is a tad big for stock injectors, but with the .91 exhaust housing it should spool and work fine.

What is your EGT reading at idle? I am wondering if there is an issue with the gauge.
 

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Discussion Starter #15
The S366SXE is a tad big for stock injectors, but with the .91 exhaust housing it should spool and work fine.

What is your EGT reading at idle? I am wondering if there is an issue with the gauge.
Truck has been idling for about 10 minutes


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Discussion Starter #17
Looks about right.

What is your fuel pressure and ICP when EGT's are running that hot?
I currently don't have an in cab fuel pressure guage so im not sure about that one. I have my regulater adjusted to about 67 on my regulated return system

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I currently don't have an in cab fuel pressure guage so im not sure about that one. I have my regulater adjusted to about 67 on my regulated return system

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It might be a good idea to find out what the FP is when running that hot. Your FP and/or ICP may be tanking, causing it to run hotter because the fuel isn't atomized well.
 

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Discussion Starter #19
Ok guys going to wake this thread back up. Finally got the money to get a fuel pressure guage and I have my fuel pressure set at 68psi. Fuel pressure stays constant at full throttle it might drop to 65psi but from what i can tell thats about normal. I have ran boost leak test and exhasut leak test and everything is sealed up tight no leaks. Egts are still climbing very quickly just having my chip in the 40hp eco setting i give about half throttle and I see my egts climb to 1000 very regular. Starting to think this might be a tuning issue? Yall have been a huge help just thought I would get your opinion.

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Did you have egt issues before the t4 mount and s366? The new turbo should have helped things. Not made them worse. If everything is sealed up you should not have egt issues. Have you tried towing with this setup? It sounds like your egts would be out of control.

When I accelerate hard with mine my egts go up to around 1k degrees pretty fast but then stay there or climb up very slowly. Your turbo is better than mine. I never had any tuning changed after I ditched the d66 for the s366 and it pretty much solved all my smoke and egt problems.

At idle and just cruising are not helpful for reading egts. You need to tow something or bury your foot in the throttle and see what it does. How well does it spool up? When it shifts does it fall on its face or does it keep on pulling?
 
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