It's at work, I'll have a measure in the AM.Originally Posted by Sketchy_Racer
Bogeyman
It's at work, I'll have a measure in the AM.
Go soothingly on the grease mud, as there lurks the skid demon
Pretengineer
Awesome, thanks.
Fully qualified Sifter.
Drop me an email at work too mate, and I'll have a sift about and see if there's something kicking around I can sort for you.
pmcdonald@wmcc.co.nz
No8 Wire Extraordinaire
You mean to get it back to legal size? Good point, do the right thing Rich.
Don't you look at my accountant.
He's the only one I've got.
Bogeyman
Body is a 90x100 oval, it's 450 long, 550 overall.
In hole is nom 50mm Dia.
Weighs 2.1Kg
Go soothingly on the grease mud, as there lurks the skid demon
Forum whore
I'm insanely impressed.... Well done...
Pretengineer
Thanks for that, unfortunately too heavy for my application but thanks for taking the time to check it out.
Cheers,
Sketchy
Armature speller
Maybe a SuperTrapp IDS? Very light and tunable.
Ta
Just make one. It's easiest way to make it nice and light. Use sheet instead of pipe to save on cost.
Low personal B.M.E.P.
Have a look at the $79 Chinese ones on trademe. VERY light, baffle pulls out to give 50mm straight thru and there's plenty of volume.
I've got one on a Z1 racebike at present and I'm happy with it. Just had to spin up a front flange piece.
They come in flashy colours too - just right for a bucket....
The last thing you need on a blown motor is any flow resistance in the exhaust...it's goodbye exhaust valve.
Ta
Then it was pointless building the thing, because a 50mm free flow would make it so fucking noisy that it can't run at any tarmac track in the country.
Forum whore
I have the one I put on mine before I got a quieter one. It weighs 0.7kg but you would need to repack it to reduce the noise level.
Pick up at track tomorrow or Hataitai.
Even has bad weld work and is made of butter metal like all the cheap nasty tardme butter pipes.
I have evolved as a KB member.Now nothing I say should be taken seriously.
Low personal B.M.E.P.
Pull your head out of your arse Drew...I've been building pipes and silencers for race bikes and cars since before you were in nappies...
I won't recommend something if I don't think it will work.
Our blown 500 twin used two 2 in bore straight thru mufflers and was well under 100DB - at a time when the regs asked for 102max.
this muffler I'm recommending has plenty of muffler volume - which is the main thing you need - and i'm confident it wil be legal.
The one I'm using now is on a full house Z1 racebike - big cams and compression - and is runnng at about 89 DB.
In my experience,noise on a 4 stroke is directly proportional to cam overlap. Also in my experience, most people have no fucking idea how to silence a race bike effectively.
In the riders seat
His head spends quite a bit of time up there
"If you can make black marks on a straight from the time you turn out of a corner until the braking point of the next turn, then you have enough power."
MotoFXR's will rule the world!
but I wait for Drews well thought out reply with interest..........
Its harder to lose weight than gain horsepower.
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