I'm coming along pretty well on my OM617 turbo install into a '67 Land Rover. I'll be at the point where I'll need to build the exhaust next week. With the help of the turbo, do you think it is really necessary to run a muffler on this truck, or can I just run straight pipe? Keep in mind it's a truck so it needn't be as quiet as a passenger car. It will have 2.5" stainless pipe the whole way.



jim

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http://www.seriestrek.com

If you don't live in a state that will deny you an inspection sticker for a noisy exhaust then you can probably get away with a straight pipe...but you should check with the laws in your state to see if you are opening yourself up to harrasment by the police too as many states have noise ordinances and you can be ticketed for having a noisy exhaust even if there is no inspection for that.

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Marty D.

2013 C300 4Matic
1984 BMW 733i
2013 Lincoln MKz

I don't want the thing to sound like a hotrod, but I was hoping the turbo would make it quiet without a muffler. Maybe I'm wrong.

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http://www.seriestrek.com

The turbo muffles the exhaust but it is still loud.

Thanks. That's what I needed to know.

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http://www.seriestrek.com

A thing of beauty, Jim!

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1980 300TD-China Blue/Blue MBTex-2nd Owner, 107K (Alt Blau) OBK #15
'06 Chevy Tahoe Z71 (for the wife & 4 kids, current mule) '03 Honda Odyssey (son #1's ride, reluctantly) '99 GMC Suburban (255K+ miles, semi-retired mule) 21' SeaRay Seville (summer escape pod)

I run a straight 2.5" pipe on my 300SD and its not all that loud. I'd say go for it.

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-diesel is not just a fuel, its a way of life-
'15 GLK250 Bluetec 118k - mine - (OC-123,800)
'17 Metris(VITO!) - 37k - wifes (OC-41k)
'09 Sprinter 3500 Winnebago View - 62k (OC - 67k)
'13 ML350 Bluetec - 95k - dad's (OC-98k)
'01 SL500 - 103k(km) - dad's (OC-110,000km)
'16 E400 4matic Sedan - 148k - Brothers (OC-155k)

Some of our members are running a cat, or a high flow cat, either will quiet it a bit more, but no 'muffler'

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Thanx,
Alberta Luthier
1983 300CD ('Stinky')155k miles, 2.47 diff, EGR removed, AAZ injectors with 265 nozzles from Sean,and vogtland lowering springs.
1984 300SD ('Old Blue')150k Klicks from Japan originally, came with rear head rests, no sunroof and never had an EGR

I second this comment 100%.

I'm in 100% the same situation.

I'd say go for it.

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Awesome, a fellow straight pipe runner!

Its barely noticeable inside the car. My dad's SD has stock exhaust and sure its quieter, but my car sounds better. I'd say cabin noise goes up maybe 10% over stock at the absolute most. Probably less. Outside noise while accelerating behind the car is probably 60% louder than stock, which is almost no noise at all. On the freeway you can't tell much difference at all. The engine is already loud. Especially when cruising at 80mph (like I usually do).

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-diesel is not just a fuel, its a way of life-
'15 GLK250 Bluetec 118k - mine - (OC-123,800)
'17 Metris(VITO!) - 37k - wifes (OC-41k)
'09 Sprinter 3500 Winnebago View - 62k (OC - 67k)
'13 ML350 Bluetec - 95k - dad's (OC-98k)
'01 SL500 - 103k(km) - dad's (OC-110,000km)
'16 E400 4matic Sedan - 148k - Brothers (OC-155k)

That looks pretty cool so far. I figured you pretty much had to have a muffler anywhere these days. I live in a pretty densly populated area. I don't think you could get away with no muffler in the Washington, DC area.

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" We have nothing to fear but the main stream media itself . . . ."- Adapted from Franklin D Roosevelt for the 21st century

OBK #55

1998 Lincoln Continental - Sold
Max 1984 300TD 285,000 miles - Sold
The Dee8gonator 1987 560SEC 196,000 miles - Sold
Orgasmatron - 2006 CLS500 90,000 miles
2002 C320 Wagon 122,000 miles
2016 AMG GTS 12,000 miles

I personally use a cherry bomb muffler, and now that its packed with soot it doesn't muffle very much. So it is in effect a straight pipe however it conforms to the letter of the my state law requiring my car have a muffler. My turbo, ox-cat, and resonator do a good job of muffling the engine.

I personally recommend that you install some form of resonator. It helps reduce the low end drone significantly. Also a exhaust tip that angles down at the ground helps too.

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green 85 300SD 200K miles "Das Schlepper Frog" With a OM603 TBO360 turbo ( To be intercooled someday )( Kalifornistani emissons )
white 79 300SD 200K'ish miles "Farfegnugen" (RIP - cracked crank)
desert storm primer 63 T-bird "The Undead" (long term hibernation)

http://ecomodder.com/forum/fe-graphs/sig692a.png

thats if you care about the people behind you ^_^

If I had a built cummins I would have a straight tipped pipe right at the level of a lowered civic... suck my soot rice boy


that reminds me..

the new diesels with the zoom tube exhausts, well the duramax, blow exhaust in your face if the truck is lifted.

One accelerated next to me, it was lifted slightly, and the zoom tube is straight and angled slightly down. I got a nice warm blast of air in my face. Kinda like a hair dryer on Max.. no diesel smell though

Actually the angled down exhaust tip reduced my in car noise. It helped by bouncing the sound waves off the pavement away from the car. Before I had the tip and again when I lost it, the sound tended to bounce off the curb and back into the cabin when I had the widows rolled down. Also some of the exhaust was hitting the bumper and transmitting the sound into the cabin.

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green 85 300SD 200K miles "Das Schlepper Frog" With a OM603 TBO360 turbo ( To be intercooled someday )( Kalifornistani emissons )
white 79 300SD 200K'ish miles "Farfegnugen" (RIP - cracked crank)
desert storm primer 63 T-bird "The Undead" (long term hibernation)

http://ecomodder.com/forum/fe-graphs/sig692a.png

I tried the system on my 82 300D with just the resonator and a straight pipe, still too much resonance in the cabin. Sounded o.k. outside though. But i'd say since you've done such good looking work so far just buy a round straight through diesel magnaflow muffler or something. THEN you'll be happy with the sound.