I’m in the process of building a 900 engine (for a Cagiva Elefant) I’ve been looking which 92 mm high compression pistons are available, I’ve found the JE, Woosner, Fast by Ferracci and Pistal, the Pistal seen a bit pricey. Does anyone have experience with any of these and suggest the best to go for? If anyone happens to have a nice set they’d be prepared to sell please give me a shout. Thanks.
Cosworth do or did high comp pistons for the 900 . Now owned by Mahle . I have a set I keep thinking about putting in my Superlight.
JE are good, but their quoted compression was a fair bit lower than what I ended up with. When I went from 92mm to 94mm pistons, I got the Pistal ones designed by Bruce Meyers, which are awesome. I'd recommend either of these brands, JE were a fair bit cheaper, but I got a deal on the Pistals by going straight to Bruce himself.
Thanks for the info Ian, I had thought the quoted CR on all these HC pistons was a bit ambitious from what I’ve read about them. My last HC pistons (of unknown make to me) had similar crown to JE and Pistal, measuring CR was about 10.5 to 1 (great performance tho) Can you pass me the contact for Bruce please?
Bloo has Pistals in him. Used them several times over the years. When I did my own 853 big bore kits, JE supplied the pistons to my spec. I’d previously used Pistal off the shelf items prior to that. Still a few of those motors going strong. Wossener are pretty good. Had a customer running hi comp Pistal in a 1098 race motor but they repeatedly cracked. Replaced with a Wossener set he’d picked up and never suffered the issue again. When big boring, take account of the weights. You may need to balance the crank if there’s a significant difference. Pistal are good, but imo, the JE take some beating £ for £.
