Spuds Porting and Tuning Thread

[MattyF]

Will the misses get mad if you put it in the dish washer to Clean it 😉

Looking good any way boss 👍

[spudulike]

Will the misses get mad if you put it in the dish washer to Clean it 😉

Looking good any way boss 👍

 

The issue is I will have no time to finish it when I am doing the cooking ironing & housework when she has kicked me out! Not a good idea.

 

Did I tell you about the 066 crankcases I had sprayed up and put in the oven to bake when she came back home unexpectedly and wondered what the hell I was cooking as there was a strange aroma of paint oil and yesterdays meal:blushing:

 

Just about survived that one!

[spudulike]

Had another go at the 560XP with the carbide burrs over the weekend, anyone reading this - I DON'T KNOW IF IT WILL WORK YET! Until we prove the autotune has enough give in its parameters we don't know what will happen when we hit the wood with it.

 

The muffler has had both the inlet and outlet significantly opened up. The cover over the outlet has now been brazed shut and there really is no need to split the can open to do this. The muffler inlet has been opened to the size of the exhaust port.

 

The uppers have been re-profiled to get the flow to the back of the cylinder, the exhaust port has been widened significantly and the lower edge re-shaped as the straightness was worrying me. The inlet has had little change but have increased inlet duration by porting the piston skirt a little.

 

You can see the damage the stainless stuffer cover did to one of the upper transfers in the first transfer picture. Fortunately, I have managed to smooth it so the piston won't catch and it is away from the compression zone!

 

I have blended the inlet manifold in to the inlet port a little and all that is left is the pop up piston and also working on the cylinder skirt by the transfers.

[MattyF]

Can't wait looks great progress so far, good thing you have some nice beech to bring the auto tune in to check on .

Do you want me to order an oem ring for the piston ?

[castanea]

Oooo. Very interested to follow how this goes.

[Pinkfoot]

I can visualise a bulk load of 560 s heading Spud's way if this works.. The man will be surrounded

[spudulike]

Can't wait looks great progress so far, good thing you have some nice beech to bring the auto tune in to check on .

Do you want me to order an oem ring for the piston ?

 

It may be safer for you if you did, worth doing that and circlips as well, they are the weak points.

 

It does look good, Martin has provisionally booked it in for next Saturday for the lathe work and then......we shall see.

 

It is a learning curve, if the autotune handles this, it will take just about anything!

 

That Beech is bloody massive, around 5' at the largest part, will be attacking it with the old army 181SE as that is really going now I have done the fuel pipe, re-ported it and blanked the regulator off!

 

Time will tell on this one - it has taken quite a while!

[MattyF]

Aye it was a monster tree I saw some pics and the tree report with the picus findings , I was tempted to come down and do it for Fred as he didn't have time to do it and had to sub it out and offered it to me but its a long journey!! , told him to use matey to shift it as Paul always wants the timber if it's beech.

I will get on that at some point tm then mate.

[spudulike]

Aye it was a monster tree I saw some pics and the tree report with the picus findings , I was tempted to come down and do it for Fred as he didn't have time to do it and had to sub it out and offered it to me but its a long journey!! , told him to use matey to shift it as Paul always wants the timber if it's beech.

I will get on that at some point tm then mate.

 

The saw body has arrived by the way, just so you know! Yes, spoke to Fred about the lump of wood, tested a ported 372Xtorq on it and left Pauls yard full of sawdust:lol:

[Eddy_t]

You taking any off the base of the cylinder or are the aftermarket pistons taller?