Sorry to hear that you put all that work into trying to figure out Jim's LS lifter conversion for our Poncho's. It was still really useful info for those contemplating the project! I appreciate your experiments and the videos you do documenting them. Quite a bit on your firebird is similar to my '69 GP.
I think after looking at Jim's original information that I am still heading down the path to using the F*rd spider and dogbones to use an LS style lifter in my 428. I'm probably going to talk to both Kauffman, Butler, and DCI (Don is building my friends aluminum RAV headed engine now
https://www.facebook.com/DCIMotorspo...qiMWmPriBrhqwl) before I start buying parts though.
Quote:
Originally Posted by rohrt
I was all on board to go the LS lifter route, but just couldn't pull the trigger. I feel bad for Randy going to all that work to make the plate system only to give up on the idea.
To me it seemed like there was too much block casting inconsistency for the plate system to work.
Too much cam inconsistency - But Randy had a few flavors of lifters to accommodate the different lifts/base circle.
Didn't like how the dog bones would lift up and needed modified with use with the spider.
Didn't like that there just were not very many people using it.
I think the lifter weight is more significant. Heavy lifters need more spring pressure. More spring pressure = more wear on the rollers and thus more prone to fail. Not sure where lifter float come into play but I would imagine that too.
In the end I went the johnson short travel rollers too. Glad I got them at the 700 price and not the 1100 price.
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