exhaust wraps
#12
07-10-2007, 02:18 PM
RE: exhaust wraps
I wouldnt fool with header wrapping at all on a stock sportbike. Some race cars
used them to keep underhood heat lower and you'll see it used on some
custom choppers to keep heat off wires, plastic, legs, etc.
Header wrap on your bike will result in 0 power gain andis hard on the pipe
metal.
used them to keep underhood heat lower and you'll see it used on some
custom choppers to keep heat off wires, plastic, legs, etc.
Header wrap on your bike will result in 0 power gain andis hard on the pipe
metal.
#13
07-10-2007, 02:45 PM
RE: exhaust wraps
ORIGINAL: Pugetpower
I wouldnt fool with header wrapping at all on a stock sportbike. Some race cars
used them to keep underhood heat lower and you'll see it used on some
custom choppers to keep heat off wires, plastic, legs, etc.
Header wrap on your bike will result in 0 power gain andis hard on the pipe
metal.
I wouldnt fool with header wrapping at all on a stock sportbike. Some race cars
used them to keep underhood heat lower and you'll see it used on some
custom choppers to keep heat off wires, plastic, legs, etc.
Header wrap on your bike will result in 0 power gain andis hard on the pipe
metal.
not a lot but some gains none the less.
#14
07-10-2007, 03:29 PM
#15
07-10-2007, 03:46 PM
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RE: exhaust wraps
heres another good read that i found when i was doing mine...and if there isa HP gain its under 1 hp and not noticable. unless someone has a dyno sheet before and after that shows more gain than what i seen on a dyno with it.
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) NOW THE KICKER: Although I have experienced minimal gains by doing this mod on many different bikes with inline motors, I have not experienced any appreciable gains with it on the RC51. Now to clarify that statement let say that my first attempt was without the benefit of the PCII to alter the fueling & there were zero changes registered on the dyno with the addition of the exhaust wrap. I do have intentions of trying it again this summer & I'll post my findings at that time. Let me also say that many RC51 owners have found it very beneficial to wrap the rear headpipe where it is in close proximity to the rear shock in an effort to keep the shock cooler from radiated heat & reduce fade.
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) NOW THE KICKER: Although I have experienced minimal gains by doing this mod on many different bikes with inline motors, I have not experienced any appreciable gains with it on the RC51. Now to clarify that statement let say that my first attempt was without the benefit of the PCII to alter the fueling & there were zero changes registered on the dyno with the addition of the exhaust wrap. I do have intentions of trying it again this summer & I'll post my findings at that time. Let me also say that many RC51 owners have found it very beneficial to wrap the rear headpipe where it is in close proximity to the rear shock in an effort to keep the shock cooler from radiated heat & reduce fade.
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