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That CAD rendering, is that the machined piston? Unigraphics? :) Yep, unigraphics of the machined piston. I don't believe that the rods are the same, liners are. I'm at a customers site, so no AR parts disk available :lol: But the 3 mm is really there. Even when you look from a side 3 mm does not s...

Some progress...

New 155 piston not machined / Old 75 piston.



New piston design




Saluti,
Maurizio

Couldn't you work with a several interchangeble tubes between engine and intake plenum. Only interfacing has to be the same. And plenium has to be repositioned according tube length. Is it so that you could tune between torque and power. (Theory was longer intake: more torque at lower rpm or do you ...

If I would have is the guess then the original friction plate would be simple steel (as in Fe360, European norm). But I'm not 100% sure.

A bearing in the watt pivot makes more sence. If you look at the lever effect of the dion from the side of the car. The watt gets about 5 times bigger forces then the front center pivot of the dion. My setup is uniball in the watt linkage. And a poly bushing in the center of the watt linkage and the...

Ok, I'm looking for some feed-back ... 8) In the following picture is the timing diagram of the TS cams (motor code 062.24). http://www.home.zonnet.nl/mfeijts/SCARB/TS_nokkenas_timing.jpg My interpretation is that when the vvt is switched, the intake cam is advanced by the the vvt over 32 degrees. R...

JimGreek wrote:To check for valve/piston clearance, rotate engine without head gasket!!!

I 'm using this approach for the piston design.

:D I'm taking a short cut. I have to rebuilt the bottom end. So the rod gets new piston bearings. Machining is measured afterwards, so I can skip that fault factor (goal +/0.01) I will not mill the head. CR will be made with the pistons and then I do not have to worry about the valve reliefs later. ...

metric / imperial system. I can write books about conversion hick ups even from suppliers. But back on topic. I used a plexiglas plate and a 5 cc syringe. Combustion chamber where 48,48,49 and 47 cc .

Maurizio wrote:Not having to do your rebuilt work and a lack of a technical background also helps

In being capable of destroying engines, gearboxes, etc....

You could also try Heinbrand in Germany

http://www.heinbrand.com/details.php?ar ... anguage=en&

Looks the same but he is more speciallized in 105 and older Alfa's. Don't know if these are also availible for a gtv.

Not having to do your rebuilt work and a lack of a technical background also helps

JimGreek wrote:I failed to destroy the engine, although I'm still trying, 110,000km later! Jim K.

Ask Mats, he probably can help you on that one

OK Jim thanks for the numbers, didn't know the 2 mm for exhaust! Will do when the 155 pistons are machined and engine is pre-assembled again. Want to go the SAFE route this time. ( :lol: 8000 rpm at the end of Kesselchen, I wish I could :wink: ) ps checked the head height this morning before going t...

:? . Checked the rod and it is 156,02 mm. So where the "$&% does the piston\exhaust valve contact come from. Removed the cams, put the head on its back and filled the combustion chamber up with some very thin oil. (measured cumbustion camber volume also) And after two days only one exhaust ...