plenty of broken manley cranksThe stroker will change the geometry in the motor leading to excess angulation and wear. With that said, there aren't too many (if any) stroker VR38 failures documented.
Sunny Bryant and Linney stroker cranks are the most popular.
Sent from my SM-G900V using GT-R Life mobile appI have 4.0 L Linney crankshaft stroker and revs to 8k all the time (only 1.5 week since build lol). Downside for now is too much torque for my 7 plate clutch!
Sent from my SM-G900V using GT-R Life mobile app
On the 4.0L are you running a 165mm rod and 92mm crank? I've thought about running a high compression 4.0L with a 31.3mm compression height piston with a 166mm rod or if I really wanted to get crazy I'd go with a 167mm rod and a piston CH of 30.3mm. The later of the two is almost the best of both worlds with more displacement and could rev to 8500. I'd patent it as the Long Rod 4.0L. Although the money your have to pay to get this wouldn't be worth the minimal r/s advatage. Lol
English Racing built a Long Rod 3.8L which (I'm assuming) was probably built with a 31.3mm CH piston 10:1 cr (they are the 4.1L pistons) paired with a custom R&R 168mm rod. They may have went crazy and did a 30.3 CH piston as they like to test limits a lot - which is a great thing. The general rule of thumb I've been taught is never go below a 30.0mm ch piston on a turbo car.
Speaking of tq... this is why I have a built high compressiom 3.8L. I may go to 4.0L in the future but no anything larger. Enjoy your motor man