T5 aly with a 152 polini conversion.

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mick1
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I notice you've left the crank, seals and bearings (unprotected) in place when you worked on the casings :o . Are you just cleaning the casings with all parts intact or will you be removing/replacing ?
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fastfrog
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mick1 wrote:I notice you've left the crank, seals and bearings (unprotected) in place when you worked on the casings :o . Are you just cleaning the casings with all parts intact or will you be removing/replacing ?
all bearings/seals will be replaced. You probably noticed that the previous owner fitted the clutch seal the wrong way....
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Jack221
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Nice porting job fastfrog! What transfer and exhaust durations with the 2mm packer? And squish clearance and compression?
Vespa est ieiunas, quia semper operaturi
mick1
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fastfrog wrote:
mick1 wrote:I notice you've left the crank, seals and bearings (unprotected) in place when you worked on the casings :o . Are you just cleaning the casings with all parts intact or will you be removing/replacing ?
all bearings/seals will be replaced. You probably noticed that the previous owner fitted the clutch seal the wrong way....
Errr....yeah i did notice that... :oops:
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fastfrog
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Jack221 wrote:Nice porting job fastfrog! What transfer and exhaust durations with the 2mm packer? And squish clearance and compression?
as expected: 125/180°
Squish1mm CR haven't checked head volume....
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Jack221
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So you contiuned with the cautious port timing ;) What was the duration of the boost port in the end?

I would start with a CR of at least 11 on this :D
Vespa est ieiunas, quia semper operaturi
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fastfrog
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Boost port is lower at 120-1°. Looks actually like a Malossi's cylinder...
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Jack221
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For me 120 boost is too low. should be the same as the main transfers as a minimum, if you want speed. Lower is only good for economy, which is not so interesting.

Malossi make good cylinders that go even faster when they are ported :D
Vespa est ieiunas, quia semper operaturi
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fastfrog
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why should I? I made a child mistake when did my first timing checking...
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fastfrog
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Black clouds are approaching:
I Found by accident a crack in the hole that support the cluster shaft. I guess it's quite a classical T5 issue. Rest of the case is free from any other crack. As I do not have any spare case left I'm gonna do a major welding job on it.

Image

Along the black marks to stiffen the main fragile areas.

Image

Image
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