My Atom Minor build

[brokenenglish]

4 minutes ago, Andy Stephenson said:

ED, surely that's an AM35 with the pink cylinder head. The 25 had a black cylinder head.

I didn't dare mention it... We all have moments like that...

[911hillclimber]

Rods came from ebay, 300 deg MP as opposed to 400 and higher.

Will look at those Outerzone designs.

[Outrunner]

It's a sorry tale of woe reading ths thread, I feel for you 911. If it was my build I would do what them clever people at Laser used to do and make them from barstock as those castings look ropey, even the best looking castings can have hard spots and blowholes bits of sand and other rubbish inside.

 

If you want to drill an accurate hole then spot drill first and then use a good quality stub drill, if you need to go deeper then swap for a longer drill after starting with the stub drill. Hold the drill in a collet chuck if possible as Jacobs type chucks are not always very accurate and any runout will make life more difficult.

 

It's amazing what you have done on that old lathe but if you use barstock mistakes are much cheeper!

 

 

[Engine Doctor]

13 hours ago, Andy Stephenson said:

ED, surely that's an AM35 with the pink cylinder head. The 25 had a black cylinder head.

Well spotted  all of you 😳. Sorry your correct its a typo fat finger syndrom3 whaterver you call it; although all the bottom ends on the 25 and 35 are the same and can be swapped . That said if anyone does wsap parts between the two make sure they are from the same manufacture . IE the original wont swap over with the later models from Premier. 

Edited Friday at 09:02 by Engine Doctor

[Engine Doctor]

11 hours ago, 911hillclimber said:

Rods came from ebay, 300 deg MP as opposed to 400 and higher.

Will look at those Outerzone designs.

Were they Chinese or from a uk supplier in Chatham, kent. What name is on them ?

[911hillclimber]

Thanks for the post, and you are right.

Still trying to work with what I have.

The drill jig I have made is surprisingly accurate (it seems) and is 6mm thick so acting as a drill guide, not that robust but good enough I hope to drill just the holes for this set of castings.

Really busy over the weekend, but will try to save the other castings with this rod if they prove to be compatible.

 

The drill wandered off when drilling, the drill would progress well initially then I hit hard 'stuff' and the drill (2mm dia) would simply ride to one side of the hard inclusion.

 

This was only in the end casting mounting bosses.

 

The rod supplied via ebay is Alubuild 300. The description reads it should do the job!

Edited Friday at 09:09 by 911hillclimber