I opened a crower lifter and turns out they use Stanadyne lifters. I attached a pic below of the metering valve which gives it away. Maybe this info will be of some use so I wanted to post.
This is what I used to help identify the manufacturer. That thread overall is amazingly informative on lifters in general. https://www.reddit.com/r/EngineBuil...ndroidcss&utm_term=1&utm_content=share_button Crower does provide an option for upgraded retainers as well for most of their lifters.
be careful with all of them. Seems short of finding an old-school cam grinder that hand inspects everything mass-produced, one never knows what they will get. That is, if you don't have the knowledge and tools to check yourself.
He never indicated the lifter body in that collet or chuck, how much runout? That sounds like a loaded up wheel to me. Open grit dress needed to properly spark out the grind. IDK....
I have no knowledge of the proper surfacing of a lifter. What I do see is that a premium-priced brand-name is repackaging lifters with lousy quality control, and if they have it happen, I imagine every single one of them is subject to the same risks. Therefore, we will need to learn to do our own quality control on machining most in the past have successfully taken for granted. Otherwise, one needs to find someone with the knowledge to do this for them. Or just roll the dice.
In 455 section , heck idk. https://www.v8buick.com/index.php?t...o-longer-has-delphi-hydraulic-lifters.384843/
What I have always heard is that lifters were convex on their faces. Actually ground with an arc. The way he was explaining and what I saw was they are ground at an angle, basically pointed to 'match' the angle of the taper on the lobe. I saw no 'swinging' of the grinder to create an arc. I do know that using a 5C collet will repeat without runout if clean and using a good brand of collet.
Yep on the 5c. I've used Japan collets that had much less runout than some Hardinge. That convex angle must be just for breakin of cam. Used lifter faces end up concave, like a soupbowl, after years of mileage.
I know the guy that owns those lifters. Here's the link: BritishV8 Forum: Is this the problem with flat tappet stuff?
Not neccesarily - a crown of maybe .0015 used to be fairly standard for lifters, but I understand that lobe taper from cam to cam is kina all over the place. There is a formula to follow to calculate angles and match them. https://www.motortrend.com/how-to/check-flat-tappet-lifter-crown-lobe-taper-lifter-bores/
Being that the OEMs went to roller cams and lifters in the later 80’s I believe the aftermarket very slowly followed suit, and the aftermarket’s quality control has waned due to not having to meet or exceed OEM specs anymore, they do the grind with a tad of taper, then refurbish used lifters, or put a wee tad of a crown on new ones, “There thats good enough”
I'm just going to send any lifters out to the shop in the video (or if Scotty does them to have them match the cam). Cheap insurance seemingly. At this point, I'm saving used lifters too to have re-ground. Whoda thunk it. I have 2 engines that were supposed rebuilt in the 80's & never run. Maybe they have good lifters in them but...
