Very Interesting info in a 1998 SCC build up on a header mod they did
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From: CHITOWN, IL, USA
Very Interesting info in a 1998 SCC build up on a header mod they did
http://www.se-r.net/about/200sx/scc/nov98/index.html
The Hotshot header installed quite easily with a perfect fit. Its ceramic coating looked a lot better than our previous header's plasma aluminum coating. Dyno testing our production Hotshot header showed exactly the same power as our old custom header, a pleasant surprise. The OBDII system stayed cooperative with no MIL lights.
Then we had to mess things up. When looking at a parked motorcycle, we noticed that the second primary tubes of the bike's tri-y header were connected by a crossover tube. We figured that this was to broaden the powerband and increase low-end torque. If we could do the same thing on our header with good results, that would be great!
nov12_small.jpg (16365 bytes)
With the header removed you can see where the crossover pipe goes.
We convinced Spangler to make us a custom downpipe with a crossover tube welded in place. The results of this modified header were very interesting. Below 2000 rpm the crossover pipe gave impressive power gains of about 4 to 5 hp! The throttle response was super crisp and the off idle power was pretty spectacular. Above 2000 rpm the power was identical to the old header and above 6000, the motor lost 3 to 4 hp. As we don't really care about power in bumper to bumper traffic, the crossover pipe is somewhat detrimental to our long term power goals.
The picture of the header cross over is on the right side of the pages were this paragraph starts
The Hotshot header installed quite easily with a perfect fit. Its ceramic coating looked a lot better than our previous header's plasma aluminum coating. Dyno testing our production Hotshot header showed exactly the same power as our old custom header, a pleasant surprise. The OBDII system stayed cooperative with no MIL lights.
Then we had to mess things up. When looking at a parked motorcycle, we noticed that the second primary tubes of the bike's tri-y header were connected by a crossover tube. We figured that this was to broaden the powerband and increase low-end torque. If we could do the same thing on our header with good results, that would be great!
nov12_small.jpg (16365 bytes)
With the header removed you can see where the crossover pipe goes.
We convinced Spangler to make us a custom downpipe with a crossover tube welded in place. The results of this modified header were very interesting. Below 2000 rpm the crossover pipe gave impressive power gains of about 4 to 5 hp! The throttle response was super crisp and the off idle power was pretty spectacular. Above 2000 rpm the power was identical to the old header and above 6000, the motor lost 3 to 4 hp. As we don't really care about power in bumper to bumper traffic, the crossover pipe is somewhat detrimental to our long term power goals.
The picture of the header cross over is on the right side of the pages were this paragraph starts
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From: Western Washington
Re: Very Interesting info in a 1998 SCC build up on a header mod they did
I am honored to say that I worked for Hotshot for many years. We did everything we could to extract power from out headers. At the time, they were the best on the market. We were constantly doing R&D on our products. Its too bad that the doors had to be closed, due to all of the copycat companies. Products were being sold to the public for less than what we were making them for.
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Jan 20, 2005 07:29 AM