camshaft I.D.

[ssl78]

Any one recognize the manufacturer of this camshaft and specs?

[Daves70SS]

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 #.

[Big Block Bill]

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

[ssl78]

Ok thanks I pulled it out of a 69 427 so that must be what it is.

[ssl78]

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

[John Brown]

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

[ssl78]

Ok thanks John

[Big Block Bill]

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

[John Brown]

My TRW Performance Parts catalogue is dated 1974. Could the same cam have different specs depending on when they were made. :dunno:

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.

[John Brown]

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.

[ssl78]

By checking the cam with a dial indicator it was the same specs as John gave.