BlackWidow or Delkevic Headers?

Candy I thought you might find Cameron's article on DI 2 strokes interesting. Really helped me understand just how complicated it is to do. Lots of approaches. I need to look and see how the snow machine engines are engineered. Are they EPA exempt in the States?

http://www.cycleworld.com/another-p...n-cameron-top-dead-center?Aar3oPCqJrsDfIt1.03

 

Yes I am saying that all those ebay header companies do nearly zero dyno tuning R&D. There is very little thought put into the merges, welds, tuning length and diameters. They just do the cheapest copy of the 98/99 catless headers that they can, so they can make as much money as easily as possible. A performance header should have as close to equal length primaries as posible, tuned to a specific length/diameter and merge angles of around 20 degrees. A high end race header, will further improve upon all these parameters and get the merge angles to 15 degrees or better.

My Two brothers header has primary lengths that are all fairly close and very tight merge angles, all very hard things to do within the confines of a v4 motorcycle. My motad header had huge merge angles causing the primary pulses to literally run right into each other and variances in primary lengths of over 10 inches. Also the primary diameters were pretty much the same as factory, tiny secondaries, sloppy welding protruding into the exhaust flow and a collector packed full of chicken wire to "reduce exhaust note rasp".

 

You do not need forced induction to benefit from a performance header. I am not using forced induction and I picked up about 10mph in my 1/4 mile trap speed, when going from my motad header to my two brothers header. That is an extremely dramatic increase in horsepower, regardless of wearing earbuds or not.

 

Very interesting, "This will be a DFI or indirect injection engine to keep fuel from going out the exhaust, so there will be the speed limitation of DFI injectors. Last I heard, 10,000-rpm was the upper limit for the very fast voice-coil-driven injectors made under OMC license. Surely some progress has been made since then."


Being that the most technologically advanced direct injectors can only support fuel flow timing windows of up to 10,000 rpms, There isn't much use for them in the sport bike world, unless you were to adopt some kind of port/direct injection hybrid like the toyota gt86, which would be way too overly complex for bike use. I would still much rather see your typical modern sport bike, dual butterfly/injector/velocity stack arrangement.

 

Here's an idea I've been tossing around. Knowing that vinegar/water mix is good for removing all types of corrosion from metals and watching some miracles IMHO on YouTube, I may try that on my old crummy headers just for an academic exercise. Gallons of vinegar aren't expensive. I'd be sure to purge the interior of the pipes and add some type of protection inside and outside the pipe. It's just a thought for verification for the results on the tube.

Hey Candy, I haven't been able to locate the specifics I'm hunting on the Rapid Bike Stuff. Would you please offer a link or take some pictures? I'd gather the wiring harness isn't hard to fabricate. Wire lengths and pinout would be great. I'd wager that there isn't very much going on in the harness, but that's just a guess. I'd also wager, though no gambler, that it'd connect somewhat similarly to the Power Commander.

A picture would be really nice.

If you do, thanks! If you don't have the time or inclination, I do understand.

Thanks.

 

Just get the headers ceramic coated, a professional shop will do the necessary prep to the metal for the coating. No need to mess with it. You should see the before and after of my 15 year old two brothers headers. They looked like shit and now they look brand new.

I already posted links to the rapid bike stuff. There is no fabrication or pin out necessary... You don't modify your factory harness. This is a piggy back ECU, not a stand alone. The Rapid bike module comes with it's own wire harness and simply plugs in between the factory connections. There is no pinning or fabrication necessary.

In the very beginning (2014), when they were still doing the group buy to start the prototyping of the VFR800 kit, the wire harness was made first and then sold, in order to start production we needed 10 committed buyers. But now, production has already been completed, so the rapid bikes are now sold as a complete kit and there is no separate purchase of wire harness and module needed anymore.

 

Purchase here:

http://rapidbike.us/



Read this thread:

http://www.vfrdiscussion.com/index.php?/forums/topic/78467-official-rapid-bike-race-group-buy/



Also, please read this whole thread as well:

http://www.vfrdiscussion.com/index....bike-evo-and-racing-related-questions/&page=1




Please take the time to click the links, read the whole threads, and webpages, as all your questions have and will be answered in there already. Some of the pictures do not load automatically, but will load if you click them. I already posted a link to the page that had the wire harness pictures in it (hint hint page 7, but please read the whole thread).

 

On a motad? Are you sure it wasn't a copy?

 

Yes I had a 100% legit Motad header from 2009-2013. I was not impressed with it at all. I would have been much better off with a 98/99 header. The first one did not fit at all and the second one, I had to grind down my center stand for clearance. I did not notice improvements in power anywhere, up top or down low.