What is the valve lift on cam 30621?

Valve lift is .456" intake and .484" exhaust; cam (lobe) lift is .2847" intake and .3027" exhaust.

What is the duration at .050" for this camshaft?

Duration at .050" lifter rise is 204° intake and 216° exhaust. Advertised duration is 260° intake and 272° exhaust.

What are the lobe centers on this cam?

Lobe centers are 107° intake and 117° exhaust.

What are the .050" timing events for degreeing this cam?

The .050" duration events shown are (5) BTC, 29 ABC, 45 BBC, and (9) ATC.

What valve lash does the card specify?

Hot lash is listed as .0 for the intake (the exhaust lash value is cut off in the photo), indicating a zero-lash (hydraulic) setting.

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Camshaft Spec Card 30621 - Lift, Duration & Lobe Centers (1989 Ford Bronco)

Camshaft spec card listing cam lift, valve lift, lobe centers, duration and timing, part 30621

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Camshaft specification card showing lift, lobe centers, duration and timing values with part number 30621.

AI caption July 2017 · Photo 587 of 911

This document is a photograph of a camshaft specification card (spec plate) bearing the identification number 30621, uploaded to the gallery of a 1989 Ford Bronco. The card lists key camshaft measurements: cam lobe lift of .2847" intake and .3027" exhaust, valve lift of .456" intake and .484" exhaust, lobe centers of 107° intake and 117° exhaust, and hot lash of .0 (hydraulic, zero lash) on the intake side (exhaust value cut off at the edge of the photo). Advertised duration is 260° intake and 272° exhaust, while duration measured at .050" lifter rise is 204° intake and 216° exhaust. The .050" duration timing events are listed as (5) BTC, 29 ABC, 45 BBC, and (9) ATC; the advertised timing event figures on the left side are not readable in this photo. A reader can use this card to identify the cam grind installed in the vehicle, verify lift and duration figures, and degree the camshaft using the listed opening/closing events. The card gives no year, make, model, or engine applicability information.

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Frequently asked questions

What is the valve lift on cam 30621?: Valve lift is .456" intake and .484" exhaust; cam (lobe) lift is .2847" intake and .3027" exhaust.
What is the duration at .050" for this camshaft?: Duration at .050" lifter rise is 204° intake and 216° exhaust. Advertised duration is 260° intake and 272° exhaust.
What are the lobe centers on this cam?: Lobe centers are 107° intake and 117° exhaust.
What are the .050" timing events for degreeing this cam?: The .050" duration events shown are (5) BTC, 29 ABC, 45 BBC, and (9) ATC.
What valve lash does the card specify?: Hot lash is listed as .0 for the intake (the exhaust lash value is cut off in the photo), indicating a zero-lash (hydraulic) setting.