fsmidt wrote on 12/31/69 at 16:00:09:he greg.
how many HP do you think the savage would increase with all your modifications?
That's a really good question, but I won't be able to give you a definitive answer until my dynamometer arrives....(just kidding).
In a way, this is a case where I didn't use KISS. I made several changes, and I'm still trying to figure out which one had which effect because the overall result was so good.
Let's just guess at a couple HP for now. The throttle response is much much better. There is no hint of hesitation from idle at all. Response is dam near instant.
I did the following:
- polished the cylinder head (combustion chamber)
- ported the exhaust by 2 MM at the outlet and opened the entire passage all the way back to the valve guides.
- installed Lancer's Web Cam.
- repacked the Raask pipe.
- installed my custom made Raask baffle for back pressure.
Yesterday, I noticed that I am beginning to get a slight amber color at the inlet of the Raask pipe, which is a new change. (I don't mind amber but don't want blue.) Since I have been running 152.5 main jet and this coloration is just now starting, I must be leaner than before. That also means that I have increased air flow....SO, when I parked the bike, I also drained the carb...today the 155 main jet goes in.
So, let's just say that with the increased valve lift and exhaust area I am definitely getting better flow...
...oh yeah, one additional change was the lowered final ratio with the chain conversion. That also confuses the "feel" of the ride, because along with improved response, I have lower RPMs throughout the whole range (relative).
BTW - photos of all my exhaust work are available on my CD too