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#1
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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) |
#2
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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 |
#3
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They don’t do a lot unless you’re heavy on the throttle.
Sixto 98 E320s sedan and wagon |
#4
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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. |
#5
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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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