I thought Jon (fingers) said something about the drivers/power supply in the FICM becoming a bottleneck, even with large injectors?
What does it take to run High RPM's
- Thread starter MAXX IT OUT
- Start date
That's what we always thought too because of them not wanting to run up there. Find the right combination and then it will do it. Here is the video from my engine dyno testing. :thumb:
https://www.youtube.com/watch?v=btukKpfNAB8&list=UUV6Kphz6imzjrc9kM2sCV6A
How big of injectors are we talking with how much total power. My current plan has been to run lb7 electronic with LLY injectors, but I am debating just going to an LBZ.
That was 350%+ Exergy on a 1200hp 2.6 motor and I think it was roughly around 1650-1800us at 28* and decompressed below 14.0:1
So can you make mine run that rpm when you tune it? Maybe I should rethink the gear set I'm installing in the front right now lol
If you have the right parts combo and your motor is happy there then yes. There is a big difference in making power at high rpms and just spinning the rpms. Usually when limited on air they don't like to spin up that high loaded. At full power loaded your doing good to spin one up over 4800rpms, add air and away it goes. I wish it was just a simple yes or no answer!
Add triple turbo's a 9100 af cam, internally balance and Marks tuning and the thing will love to live over 5000 rpm. My truck is a blast to drive on the street!!!
Brett, what's the biggest benefit of an internally balanced crank? Lighter rotating assembly?
Unfortunately, you sir are 1,000,000 times correct!
Like Brett said, his stock ecm lly with tons of air likes rpms. It's all about the combination guys.
How is the 9100 for daily driving? I'll never tow & I have a super loose converter. Triples with 250% injectors. I'm wanting to set my new build up for some daily driving & still be competitive in Super Street. Really need that high rpm to keep up with those guys. 6k+ lbs is hard to back half with.
The 9100AF would idea for what your looking for meshanic.
MAXX IT Out-Internally balancing is better for the rotating assembly because it keeps most of the weight as close to the centerline of the crank as possible. This helps the motors ability to accelerate quickly without wasting hp.
MAXX IT Out-Internally balancing is better for the rotating assembly because it keeps most of the weight as close to the centerline of the crank as possible. This helps the motors ability to accelerate quickly without wasting hp.
https://www.youtube.com/watch?v=9aOJuBRGanU
This is what that kinda rpm sounds like in 2.6 truck, this is the truck that the engine dyno run is from that I posted the video of earlier in this thread.
This is what that kinda rpm sounds like in 2.6 truck, this is the truck that the engine dyno run is from that I posted the video of earlier in this thread.
There was limiter that Brayden found while looking for the resolution for Jeff Deans Dragster (LBZ) which was cutting out. (5xxx ish RPM down the track?) In the process he spun the test stand over 7000 RPM, and the ECM continued to fire the injectors. Problem solved for Jeff!
https://www.facebook.com/video.php?v=10202430950871432&pnref=story
https://www.facebook.com/video.php?v=10202431178717128&pnref=story
Caleb
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Yep
About 5200 to 5300 there WAS a limiter that no one could change. it would rev higher but it wouldn't run clean up there.
About 5200 to 5300 there WAS a limiter that no one could change. it would rev higher but it wouldn't run clean up there.
Awesome, so its confirmed that all Duramax controllers are capable of 6,000+ RPM! Nice work guys! :woott: 