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251 ENG wrote:£800 for 4 pistons in 1985

Were they solid gold with gudgen pins made of diamonds

speaking of gudgeon pins..

Once a pin has become slack in the little end, is there any remedy?? I know you can bush some of them depending on the amount of meat around the end.
A heavily lightened and polished rod may be a problem though?

Yes they can be bushed , depending on how much metal is round the little end .

All the cast omega pistons are now supplied ready to take circlips for fully floating pins .

MED also sell a special forged omega with a smaller pin , you just push the supplied bushes in to the little end.

Press fit pins are really a thing of the past now , fully floating pins with round section circlips are the way to go .

Swiftune don,t use press fit pins in anything

Press fit pins were always a pain in the arse, fully floating pins with bushes were the norm in the vast majority of british motorcycles for donkeys years together with this 'new fangled' thing call sequential gearboxes.....

rosepetal wrote:

251 ENG wrote:£800 for 4 pistons in 1985

Were they solid gold with gudgen pins made of diamonds

speaking of gudgeon pins..

no they were hand forge'd by some bloke who was connected to the cosworth guys.but dont worry about the price ive still got the bill just to prove it and on that day my jaw drop'd and my ar5e let go .the quote from the supply'r was about 3-400 quid.but thay are still in the car now and going strong

Did you get the 970 sorted then ?

oh yep
my 970 is still going strong. not had any problems since ozzy at avonbars at the time rebuilt the short block and i done the rest

guru_1071 wrote:I dont think the arrow signifies anything, I think its just a standard production feature they put on their entire range of pistons to help with assembly,

the next batch of 21253 / 21251 / probably all mini pistons made by nural will not feature the arrow. even though its a required standard marking we have had it removed to prevent confusion - i did try to get it replaced with a logo of my choice, but no dice!

what a coincidence Rich, a friend of mine at Nurals just sent me this picture that someone had enquired to have machined in a piston:

Vegard wrote:what a coincidence Rich, a friend of mine at Nurals just sent me this picture that someone had enquired to have machined in a piston:

thats my trade mark logo verg.

you owe me 20 quid for unauthorised use

Rich,

Seen 'Superbad' ? Get the claim through and you'll make a fortune

lurv all this purile stuff on the strength of "block machining"....he h e