>From my experiance with Supertrapps and dyno runs it seems that adding
backpressure [removing plates] helps midrange and reducing back pressure
[adding plates] helps the high end and you lose midrange.The dyno tech told
me that at the high end,the straighter the pipe,the better it ran.Has anyone
considered adapting an FZR 1000 EXUP unit [variable back pressure] to a
Vmax?
>From: Kelly Cash <[EMAIL PROTECTED]>
>Reply-To: [EMAIL PROTECTED]
>To: V-MAX TECH LIST <[EMAIL PROTECTED]>
>Subject: Re: Insulated Exhaust Systems
>Date: Thu, 30 Mar 2000 10:20:21 -0800
>
> >...Don't get me wrong, I think coated pipes are preferable to
> > chrome ones due to the frictional argument mentioned earlier,
> > and increased corrosion resistance. I just think the scavenge
> > due to heat retention argument doesn't make any sense.
>
>Well, I'm not a flow engineer. I was basically quoting
>the info from the coating companies. But I've got some experience
>with auto/bike mechanics, and how they explain it seems plausible
>to me. I also know that some back pressure is GOOD. If I'm
>reading your posts correctly you're saying that the more you
>reduce back pressure, the better it'll run. Not so. (which is
>evidenced by the fact that the 18" can on a Hindle slightly
>outperforms the 16" can)
>
>I don't want to turn this into a huge debate (although I'll read
>everything written). I haven't done a side-by side comparision
>dyno test between an uncoated and a coated pipe on the same bike.
>Might be an idea, if anyone has the means to do so. I do know
>that the Airborn and JetHot people claim about a 1.5 horsepower
>gain after coating the pipes. Considering what we saw in Laughlin
>at the dynos, I wouldn't argue with it.
>
>Back to the sidelines,
>
> -K
>
>======================================================================
> Kelly Cash Main: 408-727-5497
> Solid Data Systems FAX: 408-727-5496
> 2945 Oakmead Village Court [EMAIL PROTECTED]
> Santa Clara, CA 95051 www.soliddata.com
>======================================================================
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