Difference in packing material?
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Da dirty moderator
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Joined: May 2006
Posts: 12,584
From: Pittsburgh, PA
RE: Difference in packing material?
ORIGINAL: YYY.GUY
Any word on when it might be fixed?
ORIGINAL: EMS_0525
you and me both bud....
you and me both bud....
Senior Member
Joined: Oct 2006
Posts: 3,106
From: Misawa Japan
1st Gear Member
RE: Difference in packing material?
ORIGINAL: YYY.GUY
Good information ... both from you and the RaceTek guy!
I've read that better quality packing is "single strand" fiberglass instead of the chopped up stuff. Apparently the single strand last longer because it doesn't "blow out" as quickly. (BTW - I've noticed a few strands of fiberglass sneaking out of the joint between my silencer and end-cap ... its the packing that shipped with my Big Gun exhaust.)
Mike
ORIGINAL: EMS_0525
I emailed racetek the same question.... here is the response.....
Eric,
With our RaceTEX packing, no, because it works well in both. Typically, four strokes are much harder on packing than two strokes dues to heat and exhaust pulses. An amateur level motocross rider who should get 30 engine hours from our material on a 450 four stroke should get 2-3 times that on a 250cc two stroke.
The difference is mainly in density. Typically, we fill two stroke mufflers with less material that we would a four stroke. In a two stroke, we average between 160-170 grams of packing per packable liter while in four strokes we use between 200 and 220 g/l. Heat, pressure fluctuations and sound frequency differences between these engine types are all reasons for the density difference.
If you're interested in another aspect that I missed, please me know.
Brgds,
Morgan Curtice
I think i am going to take back that packing i got and get some good quality stuff. The race tek stuff looks promising...
I emailed racetek the same question.... here is the response.....
Eric,
With our RaceTEX packing, no, because it works well in both. Typically, four strokes are much harder on packing than two strokes dues to heat and exhaust pulses. An amateur level motocross rider who should get 30 engine hours from our material on a 450 four stroke should get 2-3 times that on a 250cc two stroke.
The difference is mainly in density. Typically, we fill two stroke mufflers with less material that we would a four stroke. In a two stroke, we average between 160-170 grams of packing per packable liter while in four strokes we use between 200 and 220 g/l. Heat, pressure fluctuations and sound frequency differences between these engine types are all reasons for the density difference.
If you're interested in another aspect that I missed, please me know.
Brgds,
Morgan Curtice
I think i am going to take back that packing i got and get some good quality stuff. The race tek stuff looks promising...
I've read that better quality packing is "single strand" fiberglass instead of the chopped up stuff. Apparently the single strand last longer because it doesn't "blow out" as quickly. (BTW - I've noticed a few strands of fiberglass sneaking out of the joint between my silencer and end-cap ... its the packing that shipped with my Big Gun exhaust.)
Mike
You can get it at the Race Tools Website http://www.racetools.com/muffler-lan...ondary=muffler
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