RPM for the 6.7L - limits broken!

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Oct 5, 2010
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As we've said before, we work on many projects at once. Today we delivered another FIRST for our customers breaking the magical 4,000 RPM mark with full fuelling for 07-09 6.7L Cummins using a factory ECM.

Full fuelling to 4,200 no hidden limiters, but our tester backed off! Dyno time will determine the next set of limiters that need to be worked on but fully expect to be around the 4,500 mark- hopefully we can confirm this tomorrow.

This is what Rich @ Dog House Diesel had to say earlier today

"4000 RPM's on a stock ECM 6.7 has officially been broken.

This is running a manual file on a 47RH.

Here is the actual pull to 4200 RPM's. This wasn't a hard pull, I simply rolled into the throttle in first gear and took it up to 4200 RPM's.

The light you see come on is a MIL for torque management. I simply need to extend the torque limiting table out beyond 4200 RPM's and we'll be all set.

Tomorrow she's gonna get a workout."

Here is the link to the video and the data log
First 6.7 Cummins Over 4K RPMs w/ Stock ECM - YouTube


Cheers
Cindy
 

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That's Garmons 6.7 that has all stock engine components except .100 cut decompressed pistons... Including stock head bolts.

I drove it a week ago or so with stree tires... It's Stupid crazy up in the high rpm's.. This was before Rich's new tuning...


453362be.jpg
 
Wow is that ugly, sounds real nice though!!


Sent from my F'n space phone
 
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