Failure of stock cast 3.9/4.0 pistons at higher RPM?
AE Hepolite
HRC1828 22059 The "books" suggest that 6K rpm is all these are good for, with maybe an occasion blast up to 6500 rpm. Has anyone taken these higher and suffered (or not) a failure? I'm trying to decide if I should stick with them and pick a cam that maxes out at 6200rpm. I've got solid adjustable rockers (and would therefor use a solid, not hydraulic cam) so the only limitation will be the factory pistons. |
BlownMGB-V8 Jim Blackwood 9406 Gunpowder Rd., Florence, KY 41042 (6469 posts) Registered: 10/23/2007 12:59PM Main British Car: 1971 MGB Blown,Injected,Intercooled Buick 340/AA80E/JagIRS |
Re: Failure of stock cast 3.9/4.0 pistons at higher RPM?
Not sure about the Hepolites, I regularly wound a 215 with the stock OEM high compression pistons to 7K and after 30-40K miles cracked the skirt of one of them.
Jim |