3/4 race cam

David S. Wallens wrote: I like that 25/32 cam idea. We might have to steal it. In fact, I think I just did.

With attribution right? Right?? David? Where did he go.......

They already have a bunch things like this. The new mustang guys have "ghost cams," it's a tune which makes it lope like it has a large cam.

Comp IIRC makes a line of cams specifically for the noise, Thumpr cams.

You can still buy one:

http://www.jegs.com/i/Crane+Cams/271/100082/10002/-1?CAWELAID=1710552761&CAGPSPN=pla&gclid=CjwKEAiAjfq2BRDpmdHmssaW5xsSJABToP4l1iz9YVesGVjcS6LR4h8lF8IHJLDbUsqxrxzGqJw_mhoC3dTw_wcB

And here is a good story: http://www.enginelabs.com/engine-tech/cam-valvetrain/tech-quickie-what-is-a-34-race-camshaft/

mazdeuce wrote: In reply to Knurled: That's actually a REALLY good idea. Call it "The Loper", make millions.

the diesel guys are way ahead of you with there 'lope tunes', literally just a tune that makes the truck sound like it has a huge cam and has zero performance benefit, but it does go well with a flat billed hat and Monster stickers

I didn't really get into cars until like 2005 and I never heard this terminology before. I heard "full race" before but that's it.

I've only really seen like hard numbers like duration and lift and things like that. That or "stages". I do see more often people saying like this is a "street cam" or a "race cam".

As luck would have it there was a July 1953 Hot Rod magazine awaiting me on my doorstep last night. I ordered it for an article on a Studebaker Siata since we are restoring one.

Chock full of ads for 3/4 race cams

In reply to Jumper K. Balls:

Ummmm, Studebaker Siata? Can we get some more info?

RossD wrote: In reply to Jumper K. Balls: Ummmm, Studebaker Siata? Can we get some more info?

1952 Siata Daina Gran sport that was hot rodded in the 50's with a Studebaker 253 V8 and 3spd manual with electric overdrive

In the July '53 Hot rod there is an article on one which spurred some copies. This one is very cool, very rotten and the recipient of some of the most bottom notch fabrication work the world has ever seen

I think it refers to what portion of the vacuum signal you lose at idle. A 3/4 cam still has 75% of the vacuum signal and hence will idle kinda sort of.

A full race cam won't pull vacuum under 6000 rpm