Custom M119 Headers built in 2010 by Ivers

[HOFF]

Spotted this one day when browsing
Anyone know what became of this M119 custom build and where that workshop is as it looks like some serious track cars being prepped in there?
No follow up posts at all after he posted that one up for all to see
His only comment - quote "Now ready for some extra boost. Aiming for 1000 bhp"
Surely he must have been on one of the global forums since with what progressed with the build ??
http://www.benzworld.org/forums/w124-e-ce-d-td-class/1505452-expanding-flow-m119.html

 

[Ascension]

Re: Custom Headers built in 2010 by Ivers

I would question the effectiveness of that headder design because of the twin exhaust ports in the head and it using a single tube to cover both ports. I suspect that the issues with pulse tuning and turbulence at the port has been one of the issues in getting real gains with a headder on this engine. I will bet that you will need a single tube feeding to a Y on each port for each cylinder to be effective on this engine.

 

[500AMM]

Re: Custom Headers built in 2010 by Ivers

I would question the effectiveness of that headder design because of the twin exhaust ports in the head and it using a single tube to cover both ports. I suspect that the issues with pulse tuning and turbulence at the port has been one of the issues in getting real gains with a headder on this engine. I will bet that you will need a single tube feeding to a Y on each port for each cylinder to be effective on this engine.

The numbers of ports doesn't affect the pulse sequence because it is created by one piston. There may be a pressure difference between the dual ports on one cylinder due to difference in the physical exhaust valve lift - which in theory will be marginal supposed the lifters function are in order. But the flow dynamics, and to utilize the exhaust gas speed and expansion is a different story.


-a-

 

[Ascension]

Re: Custom Headers built in 2010 by Ivers

The numbers of ports doesn't affect the pulse sequence because it is created by one piston. There may be a pressure difference between the dual ports on one cylinder due to difference in the physical exhaust valve lift - which in theory will be marginal supposed the lifters function are in order. But the flow dynamics, and to utilize the exhaust gas speed and expansion is a different story.


-a-

Yes flow dynamics will be all screwed up in that design and there will be turbulence at the ports that will likely not produce positive results. Ran motocross and old 3 cylinder Kawasaki bikes using expansion chambers as well as rotary Mazdas in my younger days, pulse tuning and flow dynamics on those is and was critical. The twin exhaust ports in these heads is a major issue in header design in these cramped compartments.