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#1
06-28-2019, 04:08 AM
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camshaft I.D.
Any one recognize the manufacturer of this camshaft and specs?
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69 RS SS L78 conv 69 RS SS ZL1 69 L78 Chevelle conv 69 L78 Nova 69 L34 Nova 67 SS Chevelle 73 Trans Am 
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#2
06-28-2019, 09:35 PM
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If its for a big block than I believe its a TRW L78 replacement cam part #TP165.
I have one around here somewhere but cannot find it at this moment to check the # stamped on it but I believe it was stamped 165. I did check my vintage TRW catalog to verify the TP165 part #.
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1970 Chevelle SS396 L78 4spd 410 posi astro blue Last edited by Daves70SS; 06-28-2019 at 09:38 PM. Reason: typo
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#3
06-28-2019, 10:51 PM
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camshaft I.D.
X-2. I have an old catalog listing part numbers somewhere if you need the exact part number and specs, but I too believe it is an aftermarket replacement L-78 camshaft.
Bill
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#4
06-29-2019, 03:11 AM
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Ok thanks I pulled it out of a 69 427 so that must be what it is.
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69 RS SS L78 conv 69 RS SS ZL1 69 L78 Chevelle conv 69 L78 Nova 69 L34 Nova 67 SS Chevelle 73 Trans Am
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#5
06-30-2019, 04:14 PM
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Bill if you get a chance to look up the specs on the 165 cam I would appreciate it can not seem to find them on the net
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69 RS SS L78 conv 69 RS SS ZL1 69 L78 Chevelle conv 69 L78 Nova 69 L34 Nova 67 SS Chevelle 73 Trans Am
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#6
06-30-2019, 04:39 PM
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TRW TP165
Intake lift .496 Exhaust lift .494 intake cam lift .306 exhaust cam lift .306 intake duration 336 exhaust duration 316 overlap 108 intake lash .024 exhaust lash .026 Lifters VL-43 Timing event at .050 cam lift intake opens 12 1/4 btdc intake closes 50 1/4 abdc exhaust opens 62 1/2 bbdc exhaust closes 4 1/2 atdc rocker arm ratio 1.7
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...................... John Brown This isn't rocket surgery.....
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#8
07-03-2019, 07:44 PM
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Camshaft I.D.
John,
The catalog I was talking about is a Sealed Power catalog from 2003. Part # CS165R: Special High Performance L-72 engines. Pro - 4000 performance mechanical Camshaft Duration @ .050; 242 Intake, 242 Exhaust Valve Lift .510" Intake, .5140" Exhaust Lobe Separation 114 Degrees. Bill
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#9
07-03-2019, 09:40 PM
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My TRW Performance Parts catalogue is dated 1974. Could the same cam have different specs depending on when they were made.
 In this catalogue, the TP165 is shown to be the stock mechanical lifter cam for 65 thru 70 396 engines. I would think there would be a note somewhere in this catalogue about 65 and 66 big blocks requiring different rear cam journal machining, but it's not there. Someone is slipping.
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...................... John Brown This isn't rocket surgery.....
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#10
07-03-2019, 09:46 PM
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Maybe the lift can be determined by measuring the height of the lobes minus the sideways width, and then multiplying by 1.7. If not, a Cam Doctor may be the only way to be sure.
__________________
...................... John Brown This isn't rocket surgery.....
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