Listen pal, I am not trying to start issues, you were asked for cam specs and you want a discussion about specs, yet you won't post them... And I am the issue? I have here to learn also but if you want to learn and discuss put up the info.... I have every right to ask for specs as you do...

Carry on

I'm dynoing multiple carbs and intakes and 2 compression ratios. I might even throw my old super secret cams back in as well. I'm spending days on the dyno and will have lots of info to provide when it's done. This isn't that thread. Right now I'm trying to learn about cams.

lobe size x rocker ratio= valve lift.

.400 lobe times 1.7 equals 680 lift at valve.

One person- mt asked the specs in a flurry of back and forth I didn't even see because I'm doing this on a phone and before I even have a chance to respond you're on here accusing me of avoiding. I don't even know what the hell a 400 lobe is or what is considered high lift and you expect me to remember a page of dozens of numbers I looked at for a minute over a week ago at the builders shop

See it how you like, but I can tell you my goal is NOT to cause issues. Myself having concerns on this thread because for 1, I have not even come close to power goals, and 2 I could possibly have a recipe for issues in my engines now... So yes cam specs linked to a failure is a big deal to us

Ok. So in the column that says lobe lift you multiply by your rocker ratio 1.6 or 1.7 etc to get your lift. So when you see a cam that says .550 they've already done that calculation for you.

I don't know the specs and as I said before having a stuck plunger on a 9 yr old lifter that was in my old overheated melted down engines is hardly due to 5 minutes of runtime no matter what the specs. You saw the thread "what do these bearings tell you"? These were the lifters from those engines

gotcha, just wondering why not run the cams you have then

this thread has been a good one with a lot of good information.lets not fuk it up and get it locked or removed.also,imo if you have 16 lifters in a engine and one fails[colapse]soon after startup i think the problem is that lifter,not the cam lobe.i had this happen on 3 different engines on the dyno,twice with 5w30 oil.all 3 had different cams.bck,throw all 16 of your old lifters in the trash.they can only cause you problems that you don,t need.jmo.

My old cams were specd for wet exhaust, low compression (so I could run cheap gas) and because I didn't want drive problems I wanted to keep the rpm low. When the engines went south I decided to try to get some more power out of them because the boat they are in now doesn't have any of the old limitations. I can't afford to change blocks or cranks or heads so I decided to change the cams.