04-02-2016, 06:39 PM
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#121 (permalink)
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Master EcoModder
Join Date: Jan 2012
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Quote:
Originally Posted by oil pan 4
What if its too efficient and vacuums out the cylinder causing more air and fuel to be pulled in?
This would be ideal for an N/A diesel in all conditions, because more air is always better for them.
For a gasoline engine this is only good if you want to burn lots of fuel and go fast.
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Adjust the cam timing, problem solved.
The Metro has external EGR so it's not important to tune the overlap for efficiency.
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04-03-2016, 10:12 AM
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#122 (permalink)
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Master Ecomadman
Join Date: Nov 2010
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You should have these headers build a year ago... all these armchair theorists.
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- Tony
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09-12-2022, 08:10 PM
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#123 (permalink)
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Not Doug
Join Date: Jun 2012
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What happened? 
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"Oh if you use math, reason, and logic you will be hated."--OilPan4
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09-12-2022, 09:33 PM
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#124 (permalink)
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Corporate imperialist
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I'm doing it.
But not on a 1L metro.
It appears to be working for what I want them to do. Problem is I'm running out of 1 inch stainless steel pipe really fast.
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1984 chevy suburban, custom made 6.5L diesel turbocharged with a Garrett T76 and Holset HE351VE, 22:1 compression 13psi of intercooled boost.
1989 firebird mostly stock. Aside from the 6-speed manual trans, corvette gen 5 front brakes, 1LE drive shaft, 4th Gen disc brake fbody rear end.
2011 leaf SL, white, portable 240v CHAdeMO, trailer hitch, new batt as of 2014.
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09-14-2022, 10:38 AM
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#125 (permalink)
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Administrator
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I never made it, not sure it would have been worth it. It would have been a really fun project, but its a LOT of time to put into a project. That is not to mention the money aspect.
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09-19-2022, 02:36 AM
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#126 (permalink)
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Ecomodding Apprentice
Join Date: Dec 2018
Location: england
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Make it and see
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09-19-2022, 10:16 AM
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#127 (permalink)
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Corporate imperialist
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I'm making really long headers for small engines such as my lawn mower and stump grinder and it's definitely working.
It's not saving any fuel in the existing engine but on my stump grinder the straight pipe has given a nice little power boost making it so I don't replace the Honda gx390 with a predator 670cc V-twin.
__________________
1984 chevy suburban, custom made 6.5L diesel turbocharged with a Garrett T76 and Holset HE351VE, 22:1 compression 13psi of intercooled boost.
1989 firebird mostly stock. Aside from the 6-speed manual trans, corvette gen 5 front brakes, 1LE drive shaft, 4th Gen disc brake fbody rear end.
2011 leaf SL, white, portable 240v CHAdeMO, trailer hitch, new batt as of 2014.
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The Following 2 Users Say Thank You to oil pan 4 For This Useful Post:
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10-16-2022, 07:26 PM
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#128 (permalink)
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EcoModding Apprentice
Join Date: Aug 2022
Location: South Africa
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Quote:
Originally Posted by Daox
I never made it, not sure it would have been worth it. It would have been a really fun project, but its a LOT of time to put into a project. That is not to mention the money aspect.
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You might look into Anti Reversion ...er... doodats to ameliorate exhaust gas reversion on a std branch as a means of skipping the time and cost.
Also the Pressure Wave Termination which looks a lot like Anti Reversion after the optimal ...into 1 pipe length.
They look a lot like a large anti reversion doodat, but has the effect of 'fooling the branch in thinking it's exhausting into open air' and negating the unwanted effects of the mufflers.
https://ecomodder.com/forum/showthre...ion-40520.html |
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10-17-2022, 09:32 AM
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#129 (permalink)
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Corporate imperialist
Join Date: Jul 2011
Location: NewMexico (USA)
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I put a 48 inch long exhaust pipe on my stump grinder 459cc engine. I'll see if it gives me a boost in power. I'm thinking the ideal length for me would be closer to 5 feet long but 4 foot is all I can manage.
__________________
1984 chevy suburban, custom made 6.5L diesel turbocharged with a Garrett T76 and Holset HE351VE, 22:1 compression 13psi of intercooled boost.
1989 firebird mostly stock. Aside from the 6-speed manual trans, corvette gen 5 front brakes, 1LE drive shaft, 4th Gen disc brake fbody rear end.
2011 leaf SL, white, portable 240v CHAdeMO, trailer hitch, new batt as of 2014.
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10-17-2022, 12:01 PM
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#130 (permalink)
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Not Doug
Join Date: Jun 2012
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Intakes can be plastic, right? That would be cheaper!
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"Oh if you use math, reason, and logic you will be hated."--OilPan4
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