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Thanks for the reply cfm56, any help I can get is much appreciated. Unfortunately, mine sounds like that cold and at running temp, ALWAYS!!! It’s terrible. Yes I have 4K springs installed and to be honest I don’t know what my idle is set at. Reads about 900 on the gauge but I’m pretty sure it’s incorrect considering I have a Dakota digital tach adapter installed which I haven’t been able to set correctly. I’m not quite sure about how to get a spot on reading of the rpm and all the google searching in the world has left me empty handed on the subject. |
Wow man, that’s some good info there, I will check into that immediately. I’m not so much worried about anything being wrong with the truck, I just hate the exhaust tone I have. I love the sound of most 12 valves I hear and purchased one partly for that reason to only end up with a truck that sounds like shit, you know what I’m saying? Thanks again so much for your replies. |
Ignoring the exhaust does the motor itself sound like mine? that should give you a rough idea what rpm you are at if your gauge is unreliable.
should be very fast click clacking. Your rpm might just be low. I mean on another note the shittier the 12 valve sounds the cooler it is in my opinion. |
Hard to say considering I can’t really hear your engine, I can only hear the exhaust. I would have to say though that it’s very possible I have a low idle. I did adjust it up a little at one point but I may have still not adjusted it enough. Is there no tool out there to confirm the rpm? I’d like to know for certain right where it’s at. |
Originally Posted by cfm56
(Post 1152815)
nothings wrong with your truck, its a completely mechanical turbo diesel and its normal with no temperature or barometric pressure compensation. stop worrying and drive it.
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Here I made a video to help you compare
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Originally Posted by cfm56
(Post 1152815)
I did some thinking, that fluttering sound is the interaction of your exhaust gas with the turbine wheel, at cold start my truck idles at 400 rpm, exhaust flow is not great enough to accelerate the turbo to a sufficient speed where it doesn't disturb exhaust flow, but as the engine warm up the exhaust drive pressure increases speeding up the turbo to a point where it doesn't impede exhaust flow and just sounds smooth with a nice whistle.. Thats why no matter what turbo you put on there that 12 valve will do that. Mine did it with a HX35 and does it with a Cheetah.
Try jamming something in the turbo to prevent it from spinning and see if the sound is still there. No amount of drive pressure will over come a piece of metal holding it static. TL:DR nothings wrong with your truck, its a completely mechanical turbo diesel and its normal with no temperature or barometric pressure compensation. stop worrying and drive it. Just so you dont think I'm bullshitting, I'm a jet engine mechanic, turbo's are my life, knowing how this stuff works and interacts is my job(I made an account just to type in this thread)... I thought about this for awhile before posting. The other trucks you hear are probably have a high idle, my Idle is set to 750 RPM AC off. |
What do you think is gonna happen if you prevent the turbo from spinning? Explain.
These Michael Bay movies got everyone fucked up. |
I assumed you were being facetious with that suggestion...
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Originally Posted by JBearSVT
(Post 1152914)
I assumed you were being facetious with that suggestion...
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