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  #1  
Old 03-22-2018, 03:45 PM
Innocent Bystander
 
Join Date: Oct 2016
Location: AZ
Posts: 149
Exhaust Manifold

Has anybody tried a header in place of the stock manifold?

Does anybody have any experienced opinion (vs knee-jerk response) as to whether it would be likely to improve power or economy? Increase overall exhaust pipe diameter also?

It is generally considered good to increase flow, and I have heard moreso with diesels, but would it be measurable on these motors? Keep in mind that even a 2hp gain is significant as a percentage of total.

(240D)

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  #2  
Old 03-22-2018, 07:17 PM
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Join Date: Oct 2013
Location: New Zealand
Posts: 538
Absolutely will make greater efficiency + power. Especially with port work, but you'd need to take the head off for that.

Here's a guy who did a lot of modding to a 617 including headers / larger pipe and claims 123hp (crank?) from NA OM617 (35hp increase)

http://www.pointedthree.com/disc/forums/showthread.php?tid=1689&start=21&posts=40
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1978 300D, 373,000km 617.912, 711.113 5 speed, 7.5mm superpump, HX30W turbo...many, many years in the making....
1977 280> 300D - 500,000km+ (to be sold...)
1984 240TD>300TD 121,000 miles, *gone*
1977 250 parts car
1988 Toyota Corona 2.0D *gone*
1975 FJ45>HJ45
1981 200>240D (to be sold...)
1999 Hyundai Lantra 1.6 *gone*
1980s Lansing Bagnall FOER 5.2 Forklift (the Mk2 engine hoist)
2001 Holden Rodeo 4JB1T 2WD

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  #3  
Old 03-22-2018, 08:19 PM
sixto's Avatar
smoke gets in your eyes
 
Join Date: Jun 2000
Location: Eastern TN
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They don’t do a lot unless you’re heavy on the throttle.

Sixto
98 E320s sedan and wagon
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  #4  
Old 03-22-2018, 09:01 PM
t walgamuth's Avatar
dieselarchitect
 
Join Date: Apr 2005
Location: Lafayette Indiana
Posts: 38,609
On a 240 you might eleminate the center or rear muffler. If you can stand the extra noise you might be able to notice an increase in fuel economy. I doubt porting and making a header would result in measurable positive results.
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[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.[SIGPIC]

..I also have a 427 Cobra replica with an aluminum chassis.
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  #5  
Old 03-24-2018, 04:56 AM
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Join Date: Aug 2010
Location: Sacramento, CA
Posts: 3,115
Depends on the engine. Would be a major redesign on my turbo diesels. Most who fab start with a baseplate - ebay for many engines.

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