What is a "3/4 cam"?

[TK73]

charger 360 30 over 3/4 cam lots more contact for more info 859-282-9334

http://lexington.craigslist.org/cto/1700927294.html

[elacruze]

'3/4 Cam' is some anachronism left over from some time in the Flathead era, I think.

Nowadays it means "I don't know what cam is in it, but it doesn't idle worth a shit and it's fast". 

[RD]

you had a racing cam and a stock cam.  from what I understand, the 3/4 cam is 75% of the difference between a stock cam and a racing cam (obviously leaning on the racing side of the scale).

[moparguy01]

I had a chevy guy inform me his 3/4 cam was .750 lift. Haha in a 350 too.

I'm under the impression it's some term which started meaning what rd said, then people who had no idea started calling it a 3/4 cam.

[oldcarnut]

Here's an explanation
http://www.tildentechnologies.com/Technical/Take_34Race.html

[694spdRT]

I had a 3/4 race cam in my 383 back in high school. At least that is what dad said he put in it back in 1976. 

[Cooter]

"3/4" Race Cam
"Police Interceptor" 440 Engine
"HP" 440 engine
"Vette" Motor
"High Perf" BB Chevy block (They were ALL Stamped "High Perf" IIRC)
"383 Hemi"
"440 Hemi"
"Full Race" Cam
"One Dem "Orange" motors"
"Balanced and "Blueprinted" (When if anyone that used this term often actually knew what was involved in Blueprinting and engine, they would Clearly STOP using it)
"Big Block 318"


All Terms from the past used to try and describe Things to the ignorant, BY the ignorant....

[Todd Wilson]

I thought it was a cam for 3/4 ton pickup trucks?


Todd

[elacruze]

No, it's for 6 cylinder engines.

[ITSA426]

I thought it meant it only works the valves on the first six cylinders of a V8

[Ghoste]

I thought it meant you still owed the speed shop 25%? 

[Khyron]

lol @ responces...

[moparstuart]

 it wont work with a dana , only an 8 3/4 rear end  

[rav440]

"3/4" Race Cam
"Police Interceptor" 440 Engine
"HP" 440 engine
"Vette" Motor
"High Perf" BB Chevy block (They were ALL Stamped "High Perf" IIRC)
"383 Hemi"
"440 Hemi"
"Full Race" Cam
"One Dem "Orange" motors"
"Balanced and "Blueprinted" (When if anyone that used this term often actually knew what was involved in Blueprinting and engine, they would Clearly STOP using it)
"Big Block 318"


All Terms from the past used to try and describe Things to the ignorant, BY the ignorant....

[68X426]

Thought it meant a guaranteed win in three of every four races

[RallyeMike]

3/4 cam means it has 12 lobes left on it. The other four are in the oil pan.

[elacruze]

3/4 cam means it has 12 lobes left on it. The other four are in the oil pan.

So then they're Chevrolet cams?

[Nacho-RT74]

I think this topic has been SERIOUSLLY discussed in the past

[Tilar]

3/4 cam means it has 12 lobes left on it. The other four are in the oil pan.

So then they're Chevrolet cams?

You know, I had a Ford 6 cylinder that had a very similar cam in it once. 9 lobes still on it but the other 3 weren't in the pan, they were sticking out of a crankcase ventilation hole that I hadn't noticed before the big bang. 

[RTPTRON]

charger 360 30 over 3/4 cam lots more contact for more info 859-282-9334

http://lexington.craigslist.org/cto/1700927294.html

OK TK, Here's the deal.

You pay full price for 3/4 of a CAM but you can't install it because it is not all there.  Then you go looking for a 1/4 CAM that you also pay full price for.

Now, what you end up with is a full race CAM that cost you double.

The moral of the story is that you should just buy a full race CAM to begin with,,,,,or something like that.

I'm a little drunk so I'm sorry for the crazy answer.

[elacruze]

3/4 cam means it has 12 lobes left on it. The other four are in the oil pan.

So then they're Chevrolet cams?

You know, I had a Ford 6 cylinder that had a very similar cam in it once. 9 lobes still on it but the other 3 weren't in the pan, they were sticking out of a crankcase ventilation hole that I hadn't noticed before the big bang. 

Was the hole bigger than a Quarter?

[Grim Jhaixus]

"3/4" Race Cam
"Police Interceptor" 440 Engine
"HP" 440 engine
"Vette" Motor
"High Perf" BB Chevy block (They were ALL Stamped "High Perf" IIRC)
"383 Hemi"
"440 Hemi"
"Full Race" Cam
"One Dem "Orange" motors"
"Balanced and "Blueprinted" (When if anyone that used this term often actually knew what was involved in Blueprinting and engine, they would Clearly STOP using it)
"Big Block 318"


All Terms from the past used to try and describe Things to the ignorant, BY the ignorant....

You forgot "big block 5.0" and "Chevys are fast"

[Tilar]

3/4 cam means it has 12 lobes left on it. The other four are in the oil pan.

So then they're Chevrolet cams?

You know, I had a Ford 6 cylinder that had a very similar cam in it once. 9 lobes still on it but the other 3 weren't in the pan, they were sticking out of a crankcase ventilation hole that I hadn't noticed before the big bang. 

Was the hole bigger than a Quarter?

It was about the size of my fist, but what was left of the cam was jammed in there lengthwise.

[TylerCharger69]

I think the term "3/4 cam"....is a term used to describe a non-stock cam when that person describing it has no f**king idea what he is talking about, but wants people to think he knows it all......just my 2 cents

[elacruze]

3/4 cam means it has 12 lobes left on it. The other four are in the oil pan.

So then they're Chevrolet cams?

You know, I had a Ford 6 cylinder that had a very similar cam in it once. 9 lobes still on it but the other 3 weren't in the pan, they were sticking out of a crankcase ventilation hole that I hadn't noticed before the big bang. 

Was the hole bigger than a Quarter?

It was about the size of my fist, but what was left of the cam was jammed in there lengthwise.

I guess that 'quarter' joke wasn't as funny as I thought.