340 Norris

[rrost]

Cam for sale.

Great condition, ready to go.

300.00

[FB73tii]

Very cool but most people won't know what this is. What is duration and lift? The Norris Model 301 is roughly 285° duration and requires valve lash caps. IIRC the Norris Model 340 is 300° duration, but I don't have my notes with me to verify this. Got a cam card to go with it?

Fred '74tii and '69

(both had Norris 301's, now going to Schrick 336 and 316, respectively)

[rrost]

I do have a cam card:

Intake 57deg open

93. Close

Exhaust 93 deg open

57. Close

Duration 380

Lobe centers 104

340 lift

Does this help?

[rrost]

Duration could be 330 not 380

[FB73tii]

Yep, based on your card duration is 330°. If the lift is in thousandths then 0.340 * 1.3 rocker ratio = 0.442" valve lift (11.2 mm)

For comparison, Schrick 316 valve lift (I/E) is 11.9mm/11.9mm and Schrick 336 valve lift (I/E) is 12.4mm/12.0mm.

The Norris 301 is a very nice street cam, so I expect yours to be a good race cam. Check out the following link for some cool historical info on Norris Baronian and the Norris Cam company:

http://www.jalopyjournal.com/forum/showthread.php?t=296994

--Fred

[rrost]

Thats a great read. Thank you so much for the education..

[Mike_B]

Do the journals need to be enlarged for this cam?

[rrost]

Good Question. Not sure.

[BimmerBlooded]

With such a high lift journals should be enlarged