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Author Topic: Video of 8V71 with 5" Straight Exhaust  (Read 2326 times)
OneLapper
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« on: May 04, 2010, 09:21:17 PM »

Getting further!

8V71 Engine w/ 5" Straight Thru Exhaust
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OneLapper
1964 PD4106-2853
www.markdavia.com
TomC
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« Reply #1 on: May 04, 2010, 10:11:25 PM »

Does this mean you're going to run your engine without a muffler?  Good Luck, TomC
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Tom & Donna Christman. '77 AMGeneral 10240B; 8V-71TATAIC V730.
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1968 Silver Eagle Model 01 8V71 Allison 740 #7443


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« Reply #2 on: May 05, 2010, 03:51:13 AM »

I could do that if I wanted to! Grin
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Becky and Paul Lawry, On The Road
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OneLapper
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« Reply #3 on: May 05, 2010, 04:43:06 AM »

TomC,

I switch between the 5" straight pipe and the muffler.  I've got swapping in and out the muffler down to a science.

I'll use the straight pipe if I'm towing my car trailer, or if I need more power for hills (say, Vermont).  The muffler I use when it's the family or friends.

I will say, there is an impressive, seat of the pants improvement in performance and mileage with the straight pipe.  I'll also say, it's loud.  Too loud.  If the engine was turbo charged, the sound level would be acceptable all the time.

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OneLapper
1964 PD4106-2853
www.markdavia.com
Len Silva
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« Reply #4 on: May 05, 2010, 06:13:56 AM »

Those far more knowledgeable than me may disagree but, that seems like an awful long time to run a dry engine.  I've done the same thing but always got very nervous after twenty seconds or so without coolant.
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« Reply #5 on: May 05, 2010, 06:37:54 AM »

Len, that same thought was going through my mind also. I will be interested in the follow up on this question.

WVaNative
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Kenny
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« Reply #6 on: May 05, 2010, 06:44:29 AM »

[quote author=OneLapper link=topic=15869.msg170480#msg170480 date=1273059786

I switch between the 5" straight pipe and the muffler.  I've got swapping in and out the muffler down to a science.

I'll use the straight pipe if I'm towing my car trailer, or if I need more power for hills (say, Vermont).  The muffler I use when it's the family or friends.

I will say, there is an impressive, seat of the pants improvement in performance and mileage with the straight pipe.  I'll also say, it's loud.  Too loud.  If the engine was turbo charged, the sound level would be acceptable all the time.

[/quote]


Relating to a 6V92. Besides being loud, what are the advantages / disadvantages and / or potential risks in running without a muffler? Without a muffler, is a turbo engine quieter than a non-tubo engine? Maybe a need to install a pneumatically operated muffler bypass !!!!!!!!!
Kenny
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1941 and 1945 Flxible - South Lyon, Michigan
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« Reply #7 on: May 05, 2010, 08:43:26 AM »

We here at work design and build engine test equipment for production assembly lines. Several of my projects involved hot testing a large diesel engines without coolant. The tests were limited due to the time we could run the engines. Basically was a 30 sec warmup, snap throttle wereas we instantly went to wide open throttle and back down while collecting crankshaft velocities for fuel system function and power contribution followed by monitoring idle stability and then shut down. Engine run time was limited to approx 90 seconds. Could have been run a bit longer but customers would rather stay on the safe side to prevent any damage.   
Kenny
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1941 and 1945 Flxible - South Lyon, Michigan
Dreamscape
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« Reply #8 on: May 05, 2010, 10:42:09 AM »

I thought I saw a coolant container out in the front with hoses going to and fro. Maybe I saw something else, it happens sometimes! Grin
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Becky and Paul Lawry, On The Road
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« Reply #9 on: May 05, 2010, 10:44:04 AM »

all I know is that I don't feel quite so bad, there is a little puddle of oil on the floor on that one too.
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Have Fun!!
Grant
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« Reply #10 on: May 05, 2010, 11:28:46 AM »



That's gonna be one fast pallet Shocked Cheesy!!
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It's all fun and games til someone gets hurt. Wink
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« Reply #11 on: May 05, 2010, 07:28:23 PM »

Wow, look at all that happens when I am gone off doing schoolwork! Cheesy
Keep it up, bus buddy!

-DRT
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The Bus Girl
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« Reply #12 on: May 05, 2010, 08:20:12 PM »

That sucker would make a great leaf blower!! Grin
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« Reply #13 on: May 06, 2010, 12:14:13 AM »

On my 8V-71TATAIC engine, I used a Walker 5" muffler that had both the inlet and outlet on the same end, and is an oval by about 20" long.  It is rated for turbo engines and flows very freely.  Take a look.  Good Luck, TomC
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Tom & Donna Christman. '77 AMGeneral 10240B; 8V-71TATAIC V730.
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« Reply #14 on: May 07, 2010, 05:33:05 PM »

I ran the engine a bit longer than I should have, I agree.  There is some coolant in the block f that makes any of us feel better!

I'll be swapping engine cradles this weekend and compiling all my clutch parts to built one good one!

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OneLapper
1964 PD4106-2853
www.markdavia.com
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