Mythbuster: continuing project thread of my 1303 '75

[Xellex]

excuse me if I got it wrong, but is the waste-gate gonna have it's own silencer to the left, and the main silencer is going in the old position? Couldnt the WG dump in the same exhaust pipe?

[Wally]

Originally Posted by Xellex

excuse me if I got it wrong, but is the waste-gate gonna have it's own silencer to the left, and the main silencer is going in the old position?

Yep, each its own silencer.

Couldnt the WG dump in the same exhaust pipe?

Yes, could, but (most important in my case) that would probably be too loud as the exhaust silencer will be 3,5" and the wastegate doesn't have the turbo as a "pre-silencer". Most tracks get really difficult with noise levels...
Its also better to keep it seperate for the least possible backpressure in the downpipe.
Lastly, there was probaby going to be possible ground clearence problems routing it back into the downpipe exhaust.

[Wally]

First start up after too long a time:

http://www.youtube.com/watch?v=_wk-2XcIbx0

[Bad bug]

Oh! hell the beast is back. More vids wally. Ah! just a question, how much horsepower do you intend to make this time?

[Wally]

Tnx guys! Just a new lambda bung and the big turbo silencer and I can drive again

Originally Posted by Bad bug

Ah! just a question, how much horsepower do you intend to make this time?

No intentions really. I hope the same or a little more at less boost. No telling really. I am more interested in how much further boost threshold will be. Or my own benchmark: at what rpm 15 psi will be reached. All logic says about 1000 rpm further on. Anything less will be a bonus and/or to be adressed to the TS

Interesting will also be how the heavier CB 650 valvesprings will go along with my stock 'non-straight-cut' cam gear and stock single thrust cam bearing...

[Steve Arndt]

Do you have a spring scale? I am interested in your old and new spring data. (install height, poundage)

[Wally]

Originally Posted by Steve Arndt

Do you have a spring scale? I am interested in your old and new spring data. (install height, poundage)

No, not a professional one. I use a digital scale and measure in the exact same way as much as possible with the different springs I've used new and after usage. I usually measure at installed height (type 4) and 10mm compression after installed height.
As its my own method, it doesn't have reference to published data with anyone else. That doesn't bother me, as its for my own personal use only. I am not a shop, nor do I sell anything commercially, hence my testing is just for my own interest

A real spring scale would be nice though, just hard to justify the investment with so little use...

[Bad bug]

Originally Posted by Wally

Interesting will also be how the heavier CB 650 valvesprings will go along with my stock 'non-straight-cut' cam gear and stock single thrust cam bearing...

Well i hope these springs don't cause you any grief. Wally about your shroud, is there any possibility of getting anymore.

[Humble]

That's an interesting exercise and not something I'd considered. I'd be interested in seeing how the K-motion LS1 springs I've got hold up after a season of abuse. Thanks for the heads up!