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Cam specs for '62 Corvette Fulie #5440576 05/27/20 11:06 PM
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JeffKeryk Offline OP
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I have been asked about the cam specs for a 1962 Corvette 327 FI, 360 HP.
My BIL is adjusting the lash on his restored '62. He bought the engine (period correct) from a builder.
I don't know that much about the early cars...

My understanding is the Duntov 097 cam was used in performance solid lifter 1962 Corvettes.
I think it was used from '57 until '63; after that the famous 30-30 radical cam was used.
The 097 lash specs should be .008 and .018 hot.

If you have knowledge regarding a different cam, please chime in.
I really think the timing cover should be removed and check for numbers.
I asked him to measure I/O valve lift and I can compare that to the specs I know of.
Thanks in advance.

Last edited by JeffKeryk; 05/27/20 11:08 PM.

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Re: Cam specs for '62 Corvette Fulie [Re: JeffKeryk] #5440678 05/28/20 07:23 AM
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Hmmm...checked my libreary...I had a book on the Chev fuellies...appears to have been borrowed over the last 20+ years...


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Re: Cam specs for '62 Corvette Fulie [Re: JeffKeryk] #5440686 05/28/20 07:35 AM
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The legendary Duntov SBC solid lifter cam was referred to as the 30-30 cam because that was the cold valve lash spec, .30" on both intake and exhaust valves. Now this is coming from the memory banks of a 72 year old former hot rodder, so take it with a grain of salt.

Re: Cam specs for '62 Corvette Fulie [Re: JeffKeryk] #5440704 05/28/20 07:54 AM
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According to a book I have SBC performance the pre 64 vette had cam # 3736097 mechanical lash .012/.018.

3B35A121-69CA-4833-B80E-95D0496F144D.jpeg
Last edited by cknight49090; 05/28/20 08:12 AM. Reason: Pic
Re: Cam specs for '62 Corvette Fulie [Re: cknight49090] #5440780 05/28/20 09:42 AM
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JeffKeryk Offline OP
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Originally Posted by cknight49090
According to a book I have SBC performance the pre 64 vette had cam # 3736097 mechanical lash .012/.018.

Yes, that's the Duntov 097. I believe the intake lash is .008".
I also think this is what is in his car.


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Re: Cam specs for '62 Corvette Fulie [Re: jhs914] #5440786 05/28/20 09:44 AM
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JeffKeryk Offline OP
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Originally Posted by jhs914
The legendary Duntov SBC solid lifter cam was referred to as the 30-30 cam because that was the cold valve lash spec, .30" on both intake and exhaust valves. Now this is coming from the memory banks of a 72 year old former hot rodder, so take it with a grain of salt.

Yes, the nickname was from the I/O settings. People also Mickey Moused around with the settings.


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Re: Cam specs for '62 Corvette Fulie [Re: JeffKeryk] #5440813 05/28/20 10:07 AM
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Remember the rule better loose than too tight. especially the exhaust.

Better check double that .008" I number.

We could run Street strip cams a bit tighter on the intake for track days,

This is a Vintage, car I would err on the side of conservatism.

This is a very mild cam. You should be fine at 0.01: cold..

Also see where they are at.

I would check and record three first.

And Re- torque the head bolts while you are in there.

- Ken


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Re: Cam specs for '62 Corvette Fulie [Re: ARCOgraphite] #5440940 05/28/20 12:23 PM
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JeffKeryk Offline OP
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Originally Posted by ARCOgraphite
Remember the rule better loose than too tight. especially the exhaust.

Better check double that .008" I number.

We could run Street strip cams a bit tighter on the intake for track days,

This is a Vintage, car I would err on the side of conservatism.

This is a very mild cam. You should be fine at 0.01: cold..

Also see where they are at.

I would check and record three first.

And Re- torque the head bolts while you are in there.

- Ken

Good advice. The valves are already loose; too late.
I asked him to measure the lift at the valve with the clearance set to 097 specs.
If the lift matches the 097 valve lift specs, I think I can call it good. Otherwise...

He has a ton of $$ and years into this car. He found a period correct block and Mechanical FI Unit.
You are so right; he doesn't wanna get this wrong.
Personally, I would pull the timing cover and look for ID numbers.
While he believes it is the stock reproduction cam for that engine, it could be anything.

I agree .010 cold Intake is a safe setting. This is a show and fun car; no beating.

62 Fuelie Side.jpeg62 Fuelie Before.jpeg
Last edited by JeffKeryk; 05/28/20 12:28 PM.

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Re: Cam specs for '62 Corvette Fulie [Re: JeffKeryk] #5440966 05/28/20 12:48 PM
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I found this. Looks like .012 and .018 are correct for this cam.
https://www.enginelabs.com/engine-tech/cam-valvetrain/duntov-small-block-camshaft/


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Re: Cam specs for '62 Corvette Fulie [Re: JeffKeryk] #5441268 05/28/20 07:43 PM
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I asked my BIL Mark to measure the intake and exhaust lift at the valve as best as he could.
He came up with .468" intake and just a taste more on the exhaust valve.
I used .468" divided by 1.37 rocker ratio to come up with .342 lobe lift.
The 097 cam is generally thought to be .395" and .399" I/O.

I am calling this the 097 cam for now. I suggested .012" and .018" lash.
My Motor Manual lists .008" for the intake, but my research says this is more for the weekend warrior who wanted a little more duration...

I also pinged my friend Lars Grimsrud. Yes, I know I am name dropping... He also cautioned me on the tight valve numbers.

Thanks for all your help.


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