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What size cam do I have in my 340? #1067576 09/02/11 04:27 PM 09/02/11 04:27 PM
Joined: Dec 2005 Posts: 62 Detroit, MI F FC7AARcuda OP member
FC7AARcuda OP member F Joined: Dec 2005 Posts: 62 Detroit, MI	I am trying to figure out what size the cam is in my '71 340. I built it years ago and it has never run very well (low vacuum, rough idle, etc). I know its a purpleshaft but can't find the original box or receipt. I measured the lobes and got the following: top to bottom 1.556". Side to side 1.225" It has stock rockers. So does that mean the lift is (1.556-1.225)*1.5= .496"?

Re: What size cam do I have in my 340? [Re: FC7AARcuda] #1067577 09/02/11 04:35 PM 09/02/11 04:35 PM
Joined: Aug 2005 Posts: 11,543 chicagoland,usa B buildanother I Live Here
buildanother I Live Here B Joined: Aug 2005 Posts: 11,543 chicagoland,usa	That's about right, and probably has a decent thump to it.

Re: What size cam do I have in my 340? [Re: buildanother] #1067578 09/02/11 06:38 PM 09/02/11 06:38 PM
Joined: Jan 2003 Posts: 16,376 D dogdays I Live Here
dogdays I Live Here D Joined: Jan 2003 Posts: 16,376	Replace with a medium Lunati VooDoo cam and you'll be pleasantly surprised. It's either the .484 or the .509 cam and both of those are much happier with a race setup where they never have to idle below 1000 rpm. R.

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