wanting to dump 38r

[KCTurbos]

Originally Posted by Addicted4

I'm surprised you even have to look at your egt gauge with small hybrids and a 38r. Matts tuning in a tow tune never breaks 1200* no matter what load I've put behind my truck. Might look at/for boost leaks and what tune are you running in? What gear ratio are you running in the axles?

Its funny you mention this. I have been pondering this same thing.

SO MANY people have zero issues with the 38r (or variants of it). Towing with no issues and spools awesome. Then you have some guys that have EGT issues and say it spools like a turd... then they go T4, fixes all the issues, and they love it.

I have always wondered if when they go "t4" they fix all the boost/exhaust leaks because everything is brand new, which is part of the previous problem and now why they have zero issues.

I have never met anyone that has not had some sort of boost/exhaust leak when having turbo issues. If they ever stop by the shop it takes me about 5 min to find a leak (usually they have multiple leaks). These 15-20 year old truck parts will leak and go bad. It is funny because the most common thing I hear is "wouldn't I notice if I had a boost/exhaust leak"?


I just don't see it being possible that the performance of the box 38r can vary so much... it has to be tuning, health of truck, or leaks. But that is just a theory.

[Addicted4]

Even with a stock charger in a tow tune it shouldn't get hot, now turbo surge is another animal but very doable. Something isn't right with the truck imo. Map sensor, ebp sensor causing issues, icp, ipr, tuning, boost leaks something is out of the normal operating parameters.

Stock charger does its job
38r does it better
Kc38r little better yet
T4i or t4 even better
Compounds best your going to get

[lariat 7.3]

Originally Posted by KCTurbos

Its funny you mention this. I have been pondering this same thing.

SO MANY people have zero issues with the 38r (or variants of it). Towing with no issues and spools awesome. Then you have some guys that have EGT issues and say it spools like a turd... then they go T4, fixes all the issues, and they love it.

I have always wondered if when they go "t4" they fix all the boost/exhaust leaks because everything is brand new, which is part of the previous problem and now why they have zero issues.

I have never met anyone that has not had some sort of boost/exhaust leak when having turbo issues. If they ever stop by the shop it takes me about 5 min to find a leak (usually they have multiple leaks). These 15-20 year old truck parts will leak and go bad. It is funny because the most common thing I hear is "wouldn't I notice if I had a boost/exhaust leak"?


I just don't see it being possible that the performance of the box 38r can vary so much... it has to be tuning, health of truck, or leaks. But that is just a theory.

I've checked manifolds, Uppipes, Intake Y Oring, replaced boots-hairspray and all. Pulled plenums, cleaned EBP sensor-I know what exhaust leaks look like. MAP sensor is reading correctly from what i can tell. IPR duty cycle is normal, ICP can hold 3000+. If i throw it in my all out tune itll pull 40 psi. What else can i look at?

[lariat 7.3]

Originally Posted by KCTurbos

Its funny you mention this. I have been pondering this same thing.

I have never met anyone that has not had some sort of boost/exhaust leak when having turbo issues. If they ever stop by the shop it takes me about 5 min to find a leak (usually they have multiple leaks). These 15-20 year old truck parts will leak and go bad. It is funny because the most common thing I hear is "wouldn't I notice if I had a boost/exhaust leak"?

.

If i can come by and you find this issue in 5 minutes I'll buy a turbo on the spot

[KCTurbos]

Originally Posted by lariat 7.3

If i can come by and you find this issue in 5 minutes I'll buy a turbo on the spot

Not trying to sell a turbo... just saying that a lot of guys don't think they have any leaks, but never really test for leaks.


I had a guy recently that had his truck at the shop MANY TIMES and they kept blaming the turbo and assuring there were no leaks. They kept "replacing parts" but never actually checked for leaks. That is the problem I see the most is people just "look for leaks" instead of "testing for leaks"


An easy way to check for exhaust leaks would be to have someone stick the truck in drive, hold the brake, and give it some gas. Mash the pedal to the floor and hold it as hard as you can without causing the truck to move (5-10 seconds). Look for any smoke coming out from behind the turbo. If you see any smoke then you need to find and fix the leak. It is best to be running a race tune and just MASH the throttle, then when the tire are about to spin let off and try again. You want to product black smoke if possible because it is easier to see.

Best way to check for boost leaks is the use a "boost leak tester" and pressurize the intake side. Make sure everything is connected up (turbo to intercooler to motor (some people make the mistake of of just leak testing some of the system)

[KCTurbos]

I wanted to state I am not trying to start anything. I know how these threads can get out of hand so quick.

It is just so weird how people can have such drastic results with the exact same turbo... when that happens it leads me to believe it is not a "turbo problem".


Just to throw this into the mix. I know guys who had perfect running trucks with a 38r and loved it. Went t4 because of all the recommendations and ended up disappointed. Slower spool, no extra power, and no difference in egts. Just seems weird.

[lariat 7.3]

Originally Posted by KCTurbos

Its funny you mention this. I have been pondering this same thing.

SO MANY people have zero issues with the 38r (or variants of it). Towing with no issues and spools awesome. Then you have some guys that have EGT issues and say it spools like a turd... then they go T4, fixes all the issues, and they love it.

I have always wondered if when they go "t4" they fix all the boost/exhaust leaks because everything is brand new, which is part of the previous problem and now why they have zero issues.

I have never met anyone that has not had some sort of boost/exhaust leak when having turbo issues. If they ever stop by the shop it takes me about 5 min to find a leak (usually they have multiple leaks). These 15-20 year old truck parts will leak and go bad. It is funny because the most common thing I hear is "wouldn't I notice if I had a boost/exhaust leak"?


I just don't see it being possible that the performance of the box 38r can vary so much... it has to be tuning, health of truck, or leaks. But that is just a theory.

Originally Posted by KCTurbos

I wanted to state I am not trying to start anything. I know how these threads can get out of hand so quick.

It is just so weird how people can have such drastic results with the exact same turbo... when that happens it leads me to believe it is not a "turbo problem".


Just to throw this into the mix. I know guys who had perfect running trucks with a 38r and loved it. Went t4 because of all the recommendations and ended up disappointed. Slower spool, no extra power, and no difference in egts. Just seems weird.

I know, I was just saying I'd buy one right there because i would be so happy. System has been pressurized on the intake side many times. Have also done the smoke test. I read where everyone is so happy with this thing. It runs like a top without a trailer hooked up. I run matts Personal tow/econo file that is the exact same setup 99% of the time

[lariat 7.3]

did a compression test, every cylinder was 400+

[Addicted4]

Just a thought, have a set of stock wheels and tires laying around?

[KCTurbos]

Just curious at what rpms are you having "egt" issues? Locked in OD at 60mph going 1700rpms?