High turbo noise

[Lar_s]

Just pulled a tough hill, towing my about 17k 5ver, pushing it hard to get past a wide load truck and the turbo went to about 20,000 or so... pretty loud wind up noise that is new to me. Wondered if it was normal.

The turbo normally runs up to about 15k on hills that aren't as tough.



Truck is a 2015, Ram, 6.7, 4500 miles.

Thx

[hone_eagle]

Lar's wrote:
20k is just looking at the turbo gauge on my instrument panel. It shows the rpms as they rise and fall, certainly not the same as my Silver Leaf I was used to with my 370 ISL. Perhaps it was the fan as well. Just an unusual noise to me but not alarming. I figured there are lots of folks here who are way more familiar with this rig than me.

Thx

I suspect you are looking at the boost gauge ,it reads in PSI -do not add zero's or degrees.

[kmbelt]

I'm leaning towards the fan kicking in. Mine has done it and it sounds like a jet taking off. if you were pulling a long hill, my guess is the engine finally got warm enough to need it. What was your engine temp?

[harley-dave]

Our V-10 has electric fans that kick on and off. Sounds like a plane alright. Most turbo's turn way more than 20,000 rpm. Not uncommon to be turning 120,000 to 140,000 rpm.

Dave

[downtheroad]

GoPackGo wrote:
Are you sure the noise you heard wasn't the radiator fan clutch ?

When those things lock up (at high temps and high RPMs) it almost sounds like a jet engine is under the hood.

Tim

I agree...I hear this occasionally with our Duramax. It can be un-nerving until you know what it is...

[rockhillmanor]

GoPackGo wrote:
Are you sure the noise you heard wasn't the radiator fan clutch ?

When those things lock up (at high temps and high RPMs) it almost sounds like a jet engine is under the hood.Tim

X2
I don't have dodge but the first time my clutch fan kicked in on my V10 on a hot day climbing I thought my engine had blown up and yes it sounds just like a 747 was landing under the hood. The loud sound from the clutch fan "engaging" is just incredible. Like nothing I have ever heard come from a vehicle engine!

[Lar_s]

Well there ya go... perhaps it's boost pressure... told ya I'm a novice with this engine... got too used to Silver Leaf with way more information than necessary as my wife used to say... can't have too much information now can ya???

So it sounds like its no biggie... sure pulled the hill well that's for sure.

thx for all the input

Lar

[garysol]

Lar's wrote:
20k is just looking at the turbo gauge on my instrument panel. It shows the rpms as they rise and fall,

On my 2014 Ram 3500 the only gauge in my instrument "cluster" that has anything to with the turbo is a boost pressure gauge. Nothing at all that shows turbo RPM. I am scratching my head as to where this 20,000rpm figure came from.

[shepstone]

I think I heard something like that on one of the TFL road tests. They had the Ram loaded up & went charging up the hill. Cant remember which one it was though , the guys on board were wondering what it was too.

[Lar_s]

20k is just looking at the turbo gauge on my instrument panel. It shows the rpms as they rise and fall, certainly not the same as my Silver Leaf I was used to with my 370 ISL. Perhaps it was the fan as well. Just an unusual noise to me but not alarming. I figured there are lots of folks here who are way more familiar with this rig than me.

Thx

[jus2shy]

we really need to know what the 20,000 stands in relation to. Maybe you forgot an extra zero? Were you looking at boost with the metric setting (Showing Kilo pascals), 200,000 kpascals is equivalent to 29psi which is about right.

[christopherglen]

The options are 15 & 20 psi on a boost gauge - no problem. Or 1500 & 2000 degrees on a EGT (pyro) gauge - problem.

[GoPackGo]

Are you sure the noise you heard wasn't the radiator fan clutch ?

When those things lock up (at high temps and high RPMs) it almost sounds like a jet engine is under the hood.

Tim

[ScottG]

I'm wondering the same thing.

[Turtle_n_Peeps]

20,000 what?

What are you measuring and how are you measuring it with? :h