Ok, I could raise the transfers to 130 to make it more even, but
maybe from what tiba mentioned that would be too much? I was
also thinking about raising the exhaust another 1/2mm, which would
make exhaust duration around 190. This would also lower compression
a bit, which I think might help.
Ever had one of those weekends where you have so much to do, you
end up doing nothing?
I'm a little bit stuck in thought experiments, about how to tilt
the reed cage. I have a spacer under it now, made from the
base of the original reed cage. If I grind that into a wedge,
I'm afraid it might crack.
Big B, that sounds like something I should leave for the next
stage project then. I bought a used NCY 47mm cylinder on Ebay.
Liner looks great, and porting is just like my stock cylinder was.
Will try to get better tools before attempting that one
I'm a little bit stuck in thought experiments, about how to tilt
the reed cage. I have a spacer under it now, made from the
base of the original reed cage. If I grind that into a wedge,
I'm afraid it might crack.
I have some black rubber (2 part) potting compound which might
work. With this I could also try filling in the case a bit, around the
sides of the reed cage... might help lower crankase volume.
And I could cheat a little, and put in a Koso intake manifold.
This doesn't fit right though, and would have to be fudged in there.
It's frustrating that the Vino has a slightly different mounting pattern
that the normal Minarelli cases. There's very few intakes that will
fit. The only one I know is one from MRP.. some rebranded junky
looking chrome thing.
For my educationwhat rpm do speed2 specs give, on a properly
ported engine?
Also I was asked this question in a message:
"Is your reed box tuned to carb´s 90% area?..."
I don't know what this means. It was also suggested that
I try thicker reeds. Right now I'm usind standard VForce reeds,
haven't measured their thickness.
@tiba:
Are you sure that you use .3mm thichness reeds? Stock Vl14/VL13 are .25mm.
On 100cc gocart engine (18k rpm) they have around .22-.2 mm thickness.
On StepVino's engine I would something like .35 in.
yup, positive about 0,30mm, malossi doesn't have 0,25mm reeds only polini sell them & i think top performance did have 0,25mm reeds back then.
0,35mm reeds on stepvino's setup would be overkill, the reeds would be too stiff & restrict the engine even further, i have tested 0,30 & 0,35mm reeds on my race engines & the thicker reed made my engine lose topend power contrary to what the common belief says so i put back 0,30mm reeds & it ran great.
ordered me 5 sets of polini 0,25mm reed sheets i'm gonna use them on my VL14 & VF3 reedcages as replacement petals, will let you know the results.
I thought I measured .25mm on the malossi plates... Gonna check that tonight.
About the powerloss, did you notice that only on your engine or was it the same at others?
have tested a 0.35mm reed on my MHR Team engine & a MK Prorace engine for my customer, the actual thickness of the Polini "green" reeds is 0.38mm & not 0.35mm as advertised, at low to mid throttle openings the "green" petals are ok but when i slowly rolled on the throttle to wide open the carb made a "bwoooooaaahhhhhh" sound & bogged down like it was running out of fuel so i thought the main jet was lean so i increased the main jets but to no avail, the problem never went away.
I've measured the lips of a vl13 and those are exactly .25mm thick..