Slowly getting back to financial stability , I'm starting on my sd4 again. So does a sd4 have the same size/spacing as a sbc ? I've seen that crane has a new hydraulic roller lifter that will go to 8500 rpms. Also the oil passage the same ?
85 GT 3.4 14.9 @ 90 1.9 60' Old TH125/3.06 Unknown New 4T60/3.42
Got a link to that article with a part number? I've found people "talking" about it saying it was Crane's regular SBC lifter pushed to 8500 rpm. It sounds like there was more to it than just the lifters. Cam and spring pressures also made a difference.
According to Car Craft Feb 14 they proved that their (Crane) new hydraulic roller lifters will go to 8500 with no problem. 7 will make me happy. The cam they used was 268/272 dur @ .050 AND .640 lift. Springs were 225lbs close, rated at 544 lb. My cam will be less 230/232 dur @.050, .600/.605 lift. Add 20 lbs boost = fun. Lifter PN# 11532-16
Roller lifters for SD4 is Crane PN 20518-8 (now discontinued). I don't know if that is solid or hydraulic - no description on parts list. But Crane may be able to cross-reference that to a new number equivalent.
4.3 is a small block chevy with two cylinders chopped off. lifters are EXCATLY same as small block chevy. once upon a time, when i was playing with the stroker 4 cyl, i had lunati solid roller lifters in it source with small block chevy part numbers
In that case, I'd go with Cadillac CTS-VR 8500 rpm lifters for the 1998-2000 LS engine. Those are proven. The PN 11532-16 lifters sound like regular lifters, that they managed to "push" with the right cam and valve springs.
[This message has been edited by fierosound (edited 01-13-2014).]