what wrap do you use?

 

Thermo Tec

 

"" Seems to me that a slip-on with OEM header and exhaust wrap might give you the hp gains of a full system without the expense.""

I dont see how that'd be possible..

 

"

I dont see how that'd be possible..

Why not?

In theory, exhaust wrap does the same thing as an aftermarket header i.e. moves exhaust gases thru the pipe quicker. The aftermarket header does this by larger diameters and better routing. the wrapped header would do this by higher exhaust temps which flow quicker. Same end result.

So, again, why not?

 

Wrap is more for the prvention of radtiant heat. when heat saturation is exc. you can lose power. this for the most part applies to engine bays. the body work of the bike allows the heat to be removed by the passing air easily. the other benifit of the wrap is keeping heat in the exh. this helps the gas stay moving. you will not see much of a gain from the wrap. i doubt you'd see a 1-2HP increase with a fully cermaic coated system ( on a bike), and it retains heat much better than wrap. T.K.

 

there's no way this will work man. The aftermarket systems are designed to maximize airflow as a system. A lot that starts in the headers. The shape, the flow, diameter of tubing, etc. Also the headers are before the midpipe and can. So if the flow is interupted or not as smooth as it could be before the mid pipe, how do you suppose you are going to make that up??

 

By flowing the exhaust gases quicker. And by wrapping the mid. Simple, really.:biggrin:

 

yeah well, good luck with that. Don't forget to tighten the muffler belt while you're at it.

 

Got it under control. I'm wrapping the muffler belt too. You think I'm stupid?

 

as I posted in the other thread. in theory this will not be beneficial. since from what I know in thermodynamic. work output for all heat engine is define by change in the input and output temperature. i.e. input is the temperature where the gas is ignite at (which is fixed) out put is the exhaust temperature. by wrapping the exhaust pipe. it will increase the overall temperature of the engine system with out increasing the ignition temperature (which is dictate by the chemistry of the gas), thus it will reduce the over all power output of the engine.
like others have posted before. the flow is dictate by bent/ change in flow direction, smoothness of the inner walls, and diameter change resulting a restriction. the heated exhaust will simply expand the gas in all direction, thus the desired speed increase may be marginal.

 

as I posted in the other thread. in theory this will not be beneficial.

Fair enough. I'm not conversant in thermodynamics, so I have no idea how your explanation holds together.

Theory is one thing; practice another. i guess my question was directed to those who have actually wrapped their pipes. I guess nobody has.

I posted on another thread a snippet from a guy on the Rogue forum who knows exhausts as well as anyone:

I've come this far I might as well go on with the Exhaust wrap... Exhaust wrapping your headpipes can dramatically alter the gas flow & even the reversion pulse waves, especially beneficial for most stock exhaust headers when used with a slip-on as it tends to allow you to run much stronger in the mid-range (after rejetting). It keeps the exhaust gasses hotter longer which makes them easier to expel out the pipes. We all know that the hotter something is the easier it flows... problem is it is extremely difficult to get the jetting right after the wrapping mod & usually require main jets & needles outside the typical range of off the shelf jet-kits... Also wrapping a Stainless Steel headpipe will rapidly deteriorate the pipe & if you wrap a ceramic coated header, it will turn to ash within 3 months! So in the event any of you follow up on this stuff I only suggest wrapping the stock headpipes due to their heavy construction... The extra heat generated inside the pipes by the wrap will eventually destroy the stock headpipes too, but you can always find stock headpipes for sale just hanging in someone's garage... & to me the added useable horsepower (mid range)is worth replacing the stock headpipes every 3 or 4 years (if you even keep the bike that long).......I am relatively sure it is a worthwhile investment as in theory it should work great, but for me it's hard to beat a $50 roll of exhaust wrap & maybe some new jets & needles..."

So, in spite of the thinking here that it's a bad idea, at least someone with real world experience seems to think it works. we'll see, I suppose. I agree with the guy i qouted: what's $50 in wrap to see some hp gains?