2 stroke detroit

[kstehnacs]

Looking for a good sound clip of a 2 stroke detroit, like taking off from a stop loaded. Thanks kevin.

 

[nickleinonen]

Looking for a good sound clip of a 2 stroke detroit, like taking off from a stop loaded. Thanks kevin.

see this thread...

 

[kstehnacs]

Thanks nick, thats perfect!

 

[bkaiser]

If I knew how to post a recording, my fire company's tanker/pumper would be great for you. '79 International '318' Detroit, with a can that some claim is a muffler. When this truck is at WOT under load, you can not hear the fire radio in the cab. I often question why we have a siren, I doubt anyone hears it over the truck!



If you need more sound, give me a clue what I need to do and I'll work on gettin' some noise.

 

[ThrottleJockey]

bkaiser



That baby got a Garrett turbo blowin into what looks like a GM 6-71 supercharger? Yeah, that muffler/can is HUGE!

 

[Tcolesanti]

A 318 Detroit, is an 8V-71 right? It only has a blower not a "92" series with a blower/turbo. There were red 6V-92's (mechanical) and 6V-92 Silver series (computer controlled). Thats all I know though.

I was definately rambling there------

 

[bkaiser]

This Detroit appears to be normally aspirated. The exhaust comes straight down from the manifolds, so there is definitely no turbo, and I have never heard any supercharger whine of any kind. I'm not saying it isn't there, just can't hear it over the exhaust!

 

[nickleinonen]

look for a roots blower mounted in the engine Vee right behind the governor housing



looks similar to this... #ad

 

[tgbol]

Tcolesanti I have a large number of Tubo-Charged 71 Series Detoits at work. Everything from 4 cylinders to 12. The 71's came with and with out turbos. The 92's are all turboed.

 

[dodge cummins]

i have never seen a 2 cycle diesel. do they run on a much thicker fuel oil than regular diesel. do they also take oil seperately in the crankcase? just trying to learn

 

[formula]

At least all the ones I've seen run on the same diesel fuel that you'd put in your Dodge They also take oil in the crankcase, which is not connected to the combustion chamber (like it is on a gas 2-cycle on a dirt bike or chainsaw) This is the reason the 2-cycle diesel needs to have a supercharger to run. The supercharger provides the necessary intake charge pressure at low rpm to force the exhaust gas out of the cylinders. These 2 cycle diesels have only exhaust valves in the cylinder heads, the intake "valve" is a set of ports near the bottom of the cylinder bore that is opened/closed by the piston passing over them.



How 'bout the sound of a 6V-92 with jake brake on full at about 2200 rpm... ... ... . oooooo, so sweet



Sean

 

[Proram]

All Detroits (2stroke) had superchargers, 71 is the cubic in. per cyl as is the 92 also per cyl. the 8 cyl 71 that had the turbo was called a 435. They come in sizes from 2cyl. , all the way to 16 cylinders. (basicly 2 8vs back to back. ) (i'm building a 61GMC cracker box w/ a 16V71 and an allison with a 300 in. WB) Next to Cummins Detroits are my fav.

Scott

 

[Tcolesanti]

All Detroits (2stroke) had superchargers, 71 is the cubic in. per cyl as is the 92 also per cyl. the 8 cyl 71 that had the turbo was called a 435. They come in sizes from 2cyl. , all the way to 16 cylinders. (basicly 2 8vs back to back. ) (i'm building a 61GMC cracker box w/ a 16V71 and an allison with a 300 in. WB) Next to Cummins Detroits are my fav.

Scott

Could you please post pics? Crackerboxes are soooo rare!!!!

 

[Tcolesanti]

Tcolesanti I have a large number of Tubo-Charged 71 Series Detoits at work. Everything from 4 cylinders to 12. The 71's came with and with out turbos. The 92's are all turboed.

I did not know that, thank you for enlightening me!!!

 

[Speedo]

All Detroits (2stroke) had superchargers, 71 is the cubic in. per cyl as is the 92 also per cyl. the 8 cyl 71 that had the turbo was called a 435. They come in sizes from 2cyl. , all the way to 16 cylinders. (basicly 2 8vs back to back. ) (i'm building a 61GMC cracker box w/ a 16V71 and an allison with a 300 in. WB) Next to Cummins Detroits are my fav.

Scott

The 8V-71s that were naturally aspirated were commonly 318s the 8V-71s that were truboed were 350s.



Gus

 

[tgbol]

They also built banked engines 4 sixteen cyclinder engines coupled to a common output shaft.

 

[nickleinonen]

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how stuff works page on 2 cycle diesel engine operation

 

[bkaiser]

I confirmed that our International is normally aspirated. I grew up not too far from Englishtown, so Roots type blowers, Gilmore belts and that fabulous whine go way back.



2200 RPM with the Jake on 'high' is a pretty wonderful sound, but boy is there a lot of it!



A 2 stroke diesel does not necessarily have to be abnormally aspirated - the Electro-Motive Division of GM (the railroad locomotive people) have been using a 2 stroke since the 1930's. The largest normally aspirated engine they made in production was a v16 rated at 2,000 horsepower. It also had a displacement of 645 cubic inches - per cylinder! The same engine with a turbo was rated at 3,000 horsepower. If you ever get to see one of these engines, they have a unique intake/exhaust approach - the intake is on the outside, where the exhaust would 'normally' be and the exhuast exits into the V. Their current production is 745 cubic inches per cylinder and pushing upwards of 5,000 HP. Serious power.

 

[tgbol]

The EMD I used to work on was an 8 cylinder built in the 30's. It was installed in a tug boat. It was un-turboed. It had a blower mounted off of the left to the the rear, that was huge (38"x24") The engine was rated 700hp at 700rpm, maximum RPM was 932. Captian over-revved it once when we had two barges tied to it. Engine quit and we were adrift in the harbor. I had to do some scrambling to restart it before we hit something.

 

[bkaiser]

Oops. An over 40 moment. The current EMD production is 710 , not 745 per cylinder.



The biggest they probably made was the 645 v20 in the mid 60s to 70s - 12,900 cubic inches!