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I have a 2006 F-250 PSD.

I have Innovative Diesel's SCT economy, tow, and street tune.
I was playing around with the SCT tuner and saw the rev limiter set at like 4,100 RPM's (street tune) and was curious if you can turn the motor that fast.

I set the limit at 3,750 but it didn't want to shift at WOT at this point.

I returned it to economy (rev limit default at 3,600 RPM's) and I do like this tune, gets about 3 MPG better than stock, and is about the same power as stock.

The power is awesome with the street tune, but I'm afraid of turning the motor past 3,600 RPM's. The owners manual says not to turn it past 3,600 RPM's.

I wanted to see what your experience is with these tunes.
 

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Thanks for asking this question. I also have ID's tunes and I was wondering the same thing about RPM limits.

Anyone???
 

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i turn mine to 3800 all the time, and 4k on a regular basis
robert
 

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Hmmmm. So, I shouldn't be turning mine at 4150? Guess I'll set it back down a bit. :)
 

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i use to run mine to 4450 sledpulling but i don't think i will be doing that until i get some rods and a crank, just playing it safe
robert
 

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We normally pull 3900-4000rpms in our race programs. For the truck pull programs, we've run them as high as 4150 for some folks, but it really depends on what you do with the truck. I've tested our trucks up to 4400-4500 or so on they dyno many times.

As far as a safe rpm...we've been pulling 4000 rpms since these trucks were first built.
 

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I'd say 4000 rpm is safe. I have sled pullers who pull 5200rpm but at that point the LPOP gears explode. Once you fix those though, everything has been holding up nicely.
 

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InnovativeDiesel said:
We normally pull 3900-4000rpms in our race programs. For the truck pull programs, we've run them as high as 4150 for some folks, but it really depends on what you do with the truck. I've tested our trucks up to 4400-4500 or so on they dyno many times.

As far as a safe rpm...we've been pulling 4000 rpms since these trucks were first built.
I'm glad to hear that. Especially since I was showing off tonight and i nailed it from a 5mph roll and it wound up to 4500 and bounced there until I let off the throttle and then shifted to second. First time it's done that to me. Tried a couple more times after and it shifted perfect then. Kinda weird, but it sure didn't sound good at that high an RPM.
 

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I was reviewing my owners manual last night. The manual stated that the maximum governed speed is 4,000 rpm, depending upon load.

Thank-you for the replies.
 

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I seem to remember the early 6.0's had a redline on the tach at 4200 (I was surprised because it was 1000 more than my 7.3) but my '07 has no redline at all :shrug:
 

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Fast-6.0 said:
I'd say 4000 rpm is safe. I have sled pullers who pull 5200rpm but at that point the LPOP gears explode. Once you fix those though, everything has been holding up nicely.
Thats screaming ......dang I bet it sounds sweet before the gears give anyway....
jschall
 

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Used to turn my '05 to 4500 and never had any probs.....:popcorn:
 
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