Thoughts on headers
Thoughts on headers
'78 300D, OM617.912: 4spd manual, TB03 at 10PSI, 26*BTDC, DV's turned, HVAC, emissions system removed, e-fan, short ram, 3" downpipe to straight exhaust, W126 Bendix brakes, MR2 Spyder seats. 2890lbs
Would there be some benefits to having free-flowing headers? I know with some of y'alls EGT's, it wouldn't be feasible, but other than that, and the heat soak of the cast iron being far better at doing its job than steel, what do you think? Price of custom parts is no object. I've got people.
'78 300D, OM617.912: 4spd manual, TB03 at 10PSI, 26*BTDC, DV's turned, HVAC, emissions system removed, e-fan, short ram, 3" downpipe to straight exhaust, W126 Bendix brakes, MR2 Spyder seats. 2890lbs
On the naturally aspirated diesels, the gain would be almost nonexistent since their power is limited by fuel and Mercedes did a decent job designing the stock manifold. A cheap upgrade for the nonturbos would be to use the 3+2 split port manifold of the W115 300D.
ForcedInduction
01-09-2009, 04:10 AM
#2
Every Fin superturbo I've seen uses a custom made header up to the turbo. At your low boost and using a non-turbo block, the cost would definitely not be worth it.
On the naturally aspirated diesels, the gain would be almost nonexistent since their power is limited by fuel and Mercedes did a decent job designing the stock manifold. A cheap upgrade for the nonturbos would be to use the 3+2 split port manifold of the W115 300D.
'78 300D, OM617.912: 4spd manual, TB03 at 10PSI, 26*BTDC, DV's turned, HVAC, emissions system removed, e-fan, short ram, 3" downpipe to straight exhaust, W126 Bendix brakes, MR2 Spyder seats. 2890lbs
So, it would only be worth it for someone running above 10 on a 617.95x block? Need more boost...
'78 300D, OM617.912: 4spd manual, TB03 at 10PSI, 26*BTDC, DV's turned, HVAC, emissions system removed, e-fan, short ram, 3" downpipe to straight exhaust, W126 Bendix brakes, MR2 Spyder seats. 2890lbs
not unlike these:
![[Image: exhaust_fab_005.sized.jpg]](http://www.coastalboatsales.com/jfraley/gallery/albums/scubaboo/exhaust_fab_005.sized.jpg)
obviously smaller size, and with probably stainless 316L instead of 304 for better heat properties.
it would be much heavier then a tubing based header , but in the end more durable
and probably the same heat retention as a thermal wrapped tubing header.
I would cut/machine the header flange out of SS flatbar stock
here is what I did on my OM617 powered boat ( not a header, but post turbo exhaust )
http://www.coastalboatsales.com/jfraley/...oo?page=25
thoughts ?
cars
1991 W126 350SDL turbodiesel
1987 W124 E300D turbodiesel
1987 W126 300SDL turbodiesel
1984 W107 SL300D turbodiesel
1974 W115 /8 300D diesel
trucks
2001 Dodge RAM 3500 4x4 Cummins turbodiesel
boats
1974 Uniflite "Salty Dog" powered by
2x OM617.951 Mercedes Benz 5Cyl turbodiesels
oel_brenner
01-10-2009, 11:31 AM #5I have been thinking about building a set of headers for a OM603 out of sch 40 pipe parts
not unlike these:
obviously smaller size, and with probably stainless 316L instead of 304 for better heat properties.
it would be much heavier then a tubing based header , but in the end more durable
and probably the same heat retention as a thermal wrapped tubing header.
I would cut/machine the header flange out of SS flatbar stock
here is what I did on my OM617 powered boat ( not a header, but post turbo exhaust )
http://www.coastalboatsales.com/jfraley/...oo?page=25
thoughts ?
cars
1991 W126 350SDL turbodiesel
1987 W124 E300D turbodiesel
1987 W126 300SDL turbodiesel
1984 W107 SL300D turbodiesel
1974 W115 /8 300D diesel
trucks
2001 Dodge RAM 3500 4x4 Cummins turbodiesel
boats
1974 Uniflite "Salty Dog" powered by
2x OM617.951 Mercedes Benz 5Cyl turbodiesels
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