340 cam specs?

krazykuda said

The custom grind 340 4 speed cam that I had sent to Oregon cams was a few degrees off on the one lobe, which they can bump back into position... The only other thing that was off on mine was it was .006" less exhaust lift which Oregon can't "fudge", so their clone can be made to the exact lobe centers and lobe center line, with full intake lift, and only .006" less exhaust lift....

I'm not sure if @dibbons had one made and which spec it was made to.... Maybe he can let us know if he got the "improved" one...

Click to expand...

Ok we were discussing the 340 4 speed cam in the coffee thread and it was suggested that I post my info here...

I bought a set of custom ground 340 cams from a member here many years ago and have been saving them on the shelf... Another member asked if I would mind sending them to Oregon Cams so he could have one made, so we sent my cams to Oregon Cams and Ken Hoard measured them...

He can now make one of the 340 4 speed cams off of the "layout" that he did on mine... One of the lobes was a couple degrees off, but he can bump it to get right on the spec... The only area mine was off, was the exhaust lift was .006" less than the factory spec...

Here's the layout from Ken Hoard of the stock 340 Automatic cam that was custom ground to the specs:




Here's the layout from Ken Hoard of the stock 340 4 speed cam that was custom ground to the specs:




Here's my degree info compared to the Ken Hoard data:





Ken Hoard is able to bump the one lobe that is off to the proper location to match the 340 4 speed cam specs from the service manual if anyone is interested in one, contact him at Oregon Cams and he can make them now... This may be the closest to getting the 340 4 speed grind so far...