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Wow you put a lot of time, effort anad R&D into this! It sounds like 75mm compressor with the larger turbine is the way to go!

Did you ever find an input shaft that survived?

Same here I bought two 6.4's and love them. Been raping all kinds of cars racing. 170k on the clock and hasn't blown up yet. Just slips a little on the 3-5 shift. The other truck is still under construction.

Looks like the snooping has really begun. I heard with OBD III California wants to be able to OTA access vehicles on the fwy on ramp and see if the car is running clean,check engine light, modification to the tunes/engine and send out fines. I really hate this state but so far I heard its...

Im jealous of the steel pistons they come with to handle more abuse. The thing is with these new trucks I didnt think there would be any emisison remove tuning available with the EPA crack down which is why I didnt think it was going to have those huge HP numbers.

Seems pretty much on par with a 6.4 I was pretty skeptical when I was watching these guys say 620rwhp with just intake exhaust and tune.

Been away from the scene for a while. Just curious what these new 6.7's are doing these days. The 6.4 used to be the tuned powerhouse with factory compounds and rather large flowing stock fuel system. What kind of numbers are these revised 6.7's putting down? I was watching videos and people...

I wonder why they stopped making it if they made good injectors?

Wow that sucks I always thought they'd be around

Hi, Who is currently making the best quality 60% and 100% over injectors? Best parts and actually flow tests them so they are all flowing equally. Thanks!

Bringing this back from the past...did the sealant on the studs hold up and stop the coolant leak in the stud hole? What kind of damage did you find after round two? Thanks!

Sorry I mean harness from TCM to the transmission

I would look into the wiring harness that goes from the ECU to the TCM. Inspect the whole thing ohm out all the wires. This is a long shot but on the 6.0 the electronic cooling fan clutch shares the same power supply as the transmission sensors/power. When the electronic fan clutch shorts out...

OP curious what made you switch over if your 6.4 was running nice and pulling strong. I have a 6.4 single cab and love it.

Thanks!

This might be silly but did you make sure that the torque converter fully seated into the transmission? There was one time I was sure it seated fully and when installed it noticed there seemed to be more pressure on the flexplate. I removed the transmission and kept turn and pushing the...

I used to get this code. Reflashed back to stock and drove around for a while eventually showed up again. Flashed the tune back and it was gone for a while but then would keep coming back. Ended up Replaced the TCM on the frame rail and it went away.

I haven't been on in a while...but I recall there being a race/kills forums on here. Was it removed? Thanks

I swear these EPA clowns needs to be shot or hung. I'm so tired of them trying to justify their worthless existence.

I think MCC has an issue because I have the same problem