Can someone explain why... - Competition Diesel.Com

Santa Gertrudis · 04-05-2007, 01:41 AM

the different diesel engines from the big 3 sound so different. I mean, when you add an exhaust to a Cummins, it ROARS. When put one on a PSD, it sounds like a jet. When you put one on a DMax, its kind of a combo of both. Why are they so different sounding? I would just think that all diesels would sound somewhat the same, but they are like huge differences. Sorry if this is a stupid question, but I just dont know. Thanks

joefarmer · 04-05-2007, 01:45 PM

I would guess it's the injection events and bore&stroke differences, but I'm not sure. The injection events have varying amounts of pressure, cc's of fuel and timing. The engines also have resonant frequencies (harmonics), but I don't know how much that effects the sound. The turbo has as much to do with it as anything. The jet-sounding fords (and 04.5+ dmaxes) have their turbo vanes closed at idle, forcing more air through the turbine wheel. There's my shot at it. Hopefully someone more knowledgeable comes along to fix my mistakes.

brnaodn.

DieselMissy04 · 04-05-2007, 03:06 PM

i like this question! i always wondered why dodges sound so amazing :-) just playin.

JD Dearden · 04-05-2007, 03:13 PM

Just the design of the engine, turbo, and injectors and so on.

oldschoolPSD · 04-05-2007, 03:15 PM

Mine sounds like a V8 Mack

Signature600 · 04-05-2007, 03:18 PM

For starters...the Cummins is an inline 6, the others V8's...the 6 is a lot smoother running engine, hence the sound isn't as choppy. Brandon's take on the turbo's s correct on the newer engines. And the injection system differences account for the different sounds from the older engines!

IMHO,
Chris

RacinDuallie · 04-05-2007, 03:19 PM

I think the sound of a 2 stroke 4cyl Detroit with dual 6" unmuffled stacks sounds awesome.....

But I love the sound of the Cummins better.

JD Dearden · 04-05-2007, 03:21 PM

Quote:

Originally Posted by RacinDuallie

I think the sound of a 2 stroke 4cyl Detroit with dual 6" unmuffled stacks sounds awesome.....

But I love the sound of the Cummins better.

You ever heard one with 7" stacks and no muffler?

Signature600 · 04-05-2007, 03:21 PM

Quote:

Originally Posted by RacinDuallie

I think the sound of a 2 stroke 4cyl Detroit with dual 6" unmuffled stacks sounds awesome.....

But I love the sound of the Cummins better.

Got a 4-53 with a 3-1/2" straight on it...sounds like an airplane coming down the road at WOT!

Chris

RacinDuallie · 04-05-2007, 03:26 PM

Buddy has a 50's 453 in a 70 Dodge 5spd and a Gear Vendors OD, with the
6's, you can hear him coming a mile away and every time you expect to see a big rig coming-

He has it set up with a Jake Brake too and when it cracks -IT CRACKS!

Signature600 · 04-05-2007, 03:46 PM

Dude...a 4-53 with Jakes?? That would be FUN on a tractor

Wrap it up pulling a load of beans across the field and hit the jake and listen to hit rumble

Chris

RacinDuallie · 04-05-2007, 03:48 PM

it was a costly option, he had to find another rocker cover and cut both of them up to make one unit.

but listening to him crack it- it was worth the effort....

Signature600 · 04-05-2007, 04:19 PM

Sweet!

We use that tractor on an auger filling trucks and bins... not too mention every other thing we farm with is straight piped too... good thing we don't like the neighbors anyway

Chris

JJeepyjohn · 05-01-2007, 12:20 PM

Quote:

Originally Posted by oldschoolPSD

Mine sounds like a V8 Mack

Sorry, only a Mack sounds like a Mack..

04-05-2007, 01:41 AM	#1
Santa Gertrudis Name: Santa Gertrudis Title: 6.4LTTFMF Status: Not Here Join Date: Dec 2006 Location: San Marcos, Texas Member`s Gallery Posts: 3,918	Can someone explain why... the different diesel engines from the big 3 sound so different. I mean, when you add an exhaust to a Cummins, it ROARS. When put one on a PSD, it sounds like a jet. When you put one on a DMax, its kind of a combo of both. Why are they so different sounding? I would just think that all diesels would sound somewhat the same, but they are like huge differences. Sorry if this is a stupid question, but I just dont know. Thanks __________________ 2010 F-250 CC SB 4x4 It's got a chip in it Deranged Performance

04-05-2007, 01:45 PM	#2
joefarmer Name: joefarmer Title: MR. Supreme Overlord Status: Not Here Join Date: Jul 2006 Location: ohio Member`s Gallery Posts: 6,137	I would guess it's the injection events and bore&stroke differences, but I'm not sure. The injection events have varying amounts of pressure, cc's of fuel and timing. The engines also have resonant frequencies (harmonics), but I don't know how much that effects the sound. The turbo has as much to do with it as anything. The jet-sounding fords (and 04.5+ dmaxes) have their turbo vanes closed at idle, forcing more air through the turbine wheel. There's my shot at it. Hopefully someone more knowledgeable comes along to fix my mistakes. brnaodn. __________________ brandon'); DROP TABLE Users;-- 1948 Dodge 1.5t 12v RH swap \| 99 F250 12v RE test rkt \| 11 X5 'no soup' \| 08 F250 CR RE swap \| 05 2500 CR 68 standalone firepunk.com

04-05-2007, 03:06 PM	#3
DieselMissy04 Name: DieselMissy04 Title: Learning! Status: Not Here Join Date: Nov 2006 Member`s Gallery Posts: 132	i like this question! i always wondered why dodges sound so amazing :-) just playin. __________________ Real Girls Drive Cummins

04-05-2007, 03:15 PM	#5
oldschoolPSD Name: oldschoolPSD Title: My Trucks are Obsolete Status: Not Here Join Date: Jul 2006 Location: Davidsonville, MD Member`s Gallery Posts: 891	Mine sounds like a V8 Mack __________________ Sold the PSD Sold the First Gen On the prowl for a std cab dually to build a buck nasty welding truck

04-05-2007, 03:18 PM	#6
Signature600 Name: Signature600 Title: THA MAN! Status: Not Here Join Date: Aug 2006 Location: Jeffersonville, Ohio Member`s Gallery Posts: 11,974	For starters...the Cummins is an inline 6, the others V8's...the 6 is a lot smoother running engine, hence the sound isn't as choppy. Brandon's take on the turbo's s correct on the newer engines. And the injection system differences account for the different sounds from the older engines! IMHO, Chris __________________ THANKS TO: Tim Barber @ TRE Diesel Jeff Mumau @ Mumau Diesel Service Rip @ Source Automotive Don Thuren @ ThurenFab Suspension Columbus Diesel Supply

04-05-2007, 03:13 PM	#4
JD Dearden Name: JD Dearden Title: Too Much Time Status: Not Here Join Date: Jan 2007 Member`s Gallery Posts: 3,193	Just the design of the engine, turbo, and injectors and so on.

04-05-2007, 03:19 PM	#7
RacinDuallie Name: RacinDuallie Title: Black Sheep Racing Status: Not Here Join Date: Apr 2006 Location: Supporting Northeast Diesel Racing Member`s Gallery Posts: 17,369	I think the sound of a 2 stroke 4cyl Detroit with dual 6" unmuffled stacks sounds awesome..... But I love the sound of the Cummins better. __________________

04-05-2007, 03:26 PM	#10
RacinDuallie Name: RacinDuallie Title: Black Sheep Racing Status: Not Here Join Date: Apr 2006 Location: Supporting Northeast Diesel Racing Member`s Gallery Posts: 17,369	Buddy has a 50's 453 in a 70 Dodge 5spd and a Gear Vendors OD, with the 6's, you can hear him coming a mile away and every time you expect to see a big rig coming- He has it set up with a Jake Brake too and when it cracks -IT CRACKS! __________________

04-05-2007, 03:46 PM	#11
Signature600 Name: Signature600 Title: THA MAN! Status: Not Here Join Date: Aug 2006 Location: Jeffersonville, Ohio Member`s Gallery Posts: 11,974	Dude...a 4-53 with Jakes?? That would be FUN on a tractor Wrap it up pulling a load of beans across the field and hit the jake and listen to hit rumble Chris __________________ THANKS TO: Tim Barber @ TRE Diesel Jeff Mumau @ Mumau Diesel Service Rip @ Source Automotive Don Thuren @ ThurenFab Suspension Columbus Diesel Supply

04-05-2007, 03:48 PM	#12
RacinDuallie Name: RacinDuallie Title: Black Sheep Racing Status: Not Here Join Date: Apr 2006 Location: Supporting Northeast Diesel Racing Member`s Gallery Posts: 17,369	it was a costly option, he had to find another rocker cover and cut both of them up to make one unit. but listening to him crack it- it was worth the effort.... __________________

04-05-2007, 04:19 PM	#13
Signature600 Name: Signature600 Title: THA MAN! Status: Not Here Join Date: Aug 2006 Location: Jeffersonville, Ohio Member`s Gallery Posts: 11,974	Sweet! We use that tractor on an auger filling trucks and bins... not too mention every other thing we farm with is straight piped too... good thing we don't like the neighbors anyway Chris __________________ THANKS TO: Tim Barber @ TRE Diesel Jeff Mumau @ Mumau Diesel Service Rip @ Source Automotive Don Thuren @ ThurenFab Suspension Columbus Diesel Supply