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Old 11-15-2013, 02:49 PM   #11
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Originally Posted by jevanb View Post

the engine needs RPM to spool turbos and with rpm comes MPH , kind of hard to get them to light without it. I see over 100 trying to get mine to light the top charger. it would be worse without the VGT on the bottom.

true, I guess they needed the MPH, funny thing he let them have the truck while he was on travel, but I bet daddy will pay for it if the factory will not. his last project is a Z06 with 675hp
Did it have twinn chargers?
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Old 11-15-2013, 03:18 PM   #12
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Why would you want to dyno your truck???????

Sounds like a mixture of operator error and downright failure to grasp common sense.

Rule number one: DO NOT DISCONNECT THE SAFETY EQUIPMENT

The speedlimiter is there for many more reasons other than limiting speed.

Manufacturer should not repair or replace. Dyno operator is at fault--period!

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Old 11-15-2013, 03:22 PM   #13
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Why should the dealer be on the hook because the owner is an i__t?

it's a damned truck for heavens sake. A case of more money than brains if you ask me.
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Old 11-15-2013, 03:54 PM   #14
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He altered the truck and broke it. No sympathy here.

Also sounds like the Dyno needs to have higher resistance at a lower RPM.
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Old 11-15-2013, 04:16 PM   #15
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Originally Posted by jaherbst View Post
The speedlimiter is there for many more reasons other than limiting speed...
It is a fed. regulation.
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Old 11-15-2013, 07:34 PM   #16
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U guys, the limiter is because of the tires and wheels, mostly tires.
- think about it, how many lawsuits would there be these days if you had a vehicle that was allowed to go to 150 mph, but tires were rated at 110?

That's it, no speculation. Unless you have evidence otherwise, this is the reason ive seen on some trucks- even some spedos will have a different mph range than other "performace minded" vehicles (ie. Vortex max trucks had spedos that went to 120, while non trucks were 100mph, and of course the max trucks had speed rated tires)
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Old 11-15-2013, 07:36 PM   #17
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Op that sux for your buddy!
Should a got a cheby
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Old 11-15-2013, 08:12 PM   #18
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U guys, the limiter is because of the tires and wheels, mostly tires.
- think about it, how many lawsuits would there be these days if you had a vehicle that was allowed to go to 150 mph, but tires were rated at 110?

That's it, no speculation. Unless you have evidence otherwise, this is the reason ive seen on some trucks- even some spedos will have a different mph range than other "performace minded" vehicles (ie. Vortex max trucks had spedos that went to 120, while non trucks were 100mph, and of course the max trucks had speed rated tires)
+1 I had a new Yukon in 2002 and it topped out at 99 mph. I took it in and that is the stated reason from GM. Tire speed rating.
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Old 11-15-2013, 08:32 PM   #19
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Sounds FUBAR to me. Turbo boost is created by engine RPM and torque loading. I used to Dyno-Tune vehicles back in the 80's at a shop I worked at. A Chevy 454 truck was a bellowing beast at 60 mph with the Dyno setting at near max. All thid while dialing in the distributor and watching for max HP.

There should have been no need to remove the speed limiter as max HP and torque readings are created at around 3200rpm. But some of the newer vehicles may be looking at wheel speed ABS sensors and derating when no wheel speed is sensed on the front versus the rear.As for breaking a crankshaft, that is most likely going to happen sooner or later. Unless a heckuva shock load was created by jacking with the Dyno load control. I have only seen two broken cranks in my 35 year carreer. Real rare thing unless in a race car.
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Old 11-15-2013, 08:36 PM   #20
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I think they circled the weakest link on the truck. Just IMO......
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