so this mornin im at a quicky mart gettin me some breakfast and my truck is out side idling and the dude behind me goes "whats that a 3/4?" and im like huh and he goes is that a 3/4 race cam?? i bust up laughin..im goin no far from a 3/4 cam..he goes so how big is it..and i just say the specs of it and he goes so thats smaller than the 3/4 race cam? im like noo dude thats way bigger than the 1970's 3/4 race cam...

so what was the specs of that cam?? .420 ish??

any one else get stuff like this?? or ever so popular "RV" cam

 

i did a search and here's what I found. Basically a 3/4 race cam doesn't decribe a cam. There was 1/4 race, 1/2 race, 3/4 race and full race. It was used to describe how streetable the cam was.
Here are some specs of what I found a 3/4 race cam to be:
1932 to 1953 Flathead V-8.

Street and strip 3/4 Race Cam!

Isky Max. #1 = 17/52 intake, 57/12 exhaust duration at .050", 249/249 advertised duration, .364"/.364" gross lift, lash .014"/.014".

and here's a full race:

Competition Full Race Cam!

Isky 400 Jr. = 18/60 intake, 60/18 exhaust duration at .050", 258/258 advertised duration, .400"/.400" gross lift, lash .018"/.018".

 

always heard the duntov 3030 reffered to as a 3/4 race cam specs on it
.485int & exhaust, 254@50 duration solid flat tappet . fwiw.

 

next time someone asks me what cam I have... its just the 1/4.... not the 1/2 LOL.....

 

i wa fixin to tell the dude it was 1/8th race cam..

back in the 70's the duntov cam was very popular..my boss had one in his old cars

 

my fiance's dad asked me if i had put an rv cam in my last truck. i just kinda smiled and said no its a little bigger than that

 

I have a similar story my buddies dad was the same way. I told him my cam had .563 lift and he laughed at me like I was an idiot telling me that was WAAAY too much.

 

a true 3/4 cam woudl be a cam of .750 lift!!! this was broken down years ago on tv but old school idiots dont knwo any better

 

know any better than what? are you trying to say you can't have a cam with .750 of lift ?

 

or better yet.... Its just stock... and let them wonder...