F22A1 and F22A6 camshaft specs

[wagon-r]

As explained in a post I put up a few minutes ago, I purchased used F22A1 and F22A6 camshafts and degreed them.

I degreed them on the head, not the block, but the results should be the same. I set the valve lash to zero, so all measurements are of actual valve lift, and I measured lift at the top of the valve retainer.

Following are the valve lifts and duration that I measured. All durations are at 0.050" valve lift.
............................F22A1....F22A6
Exhaust lift.............0.350"....0.365"
Intake lift...............0.350"....0.365"
Exhaust open BBC.....30..........36
Exhaust close ATC....-18.........-18
Intake open BTC.......-13........-13
Intake close ABC........23.........29

Calculated
Exhaust duration......192........198
Intake duration........190........196
Exhaust center.........114........117
Intake center...........108........111
Lobe separation........111........114
Advance....................3...........3
Degrees overlap.......-31.........-31

What I find interesting is that Honda chose to extend the duration (6 degrees) by increasing the intake/exhaust lobe separation. Exhaust close and intake opening, and hence valve overlap, are unchanged.

Anyway, I hope someone finds these useful.

[P5ylance]

i love information!

and you have the bisi lvl 2 specs as well right? i'd like to see them side by side

[HappyGilmore]

New sticky coming soon? I think so! I been looking into a cam as well. I would like to know what's out there, I want to get maybe 300 out of my F22A1 someday. Would be kinda nice, even better without boost!

[deevergote]

Stuck until we can integrate it into the useful info thread. Nice work!

[mugencivic4dr]

i wish i knew what this info meant. cam specs is something that i always wanted to know about but can never find the time to "study" it :/

[jdm92_accorn]

Here's the new bisimoto level2 specs
Exhaust lift................. .403"
Intake lift.................... .389"
Exhaust open BBDC..... 41º
Exhaust closes ATDC... 1º
Intake opens BTDC....... 4º
Intake closes ABDC...... 44º

Calculated @.050"

Exhaust duration.......... 222º
Intake duration............. 228º
Exhaust center............. 110º
Intake center................ 110º
Degrees overlap........... 5º

[Joey GT-R]

i wish i knew what this info meant. cam specs is something that i always wanted to know about but can never find the time to "study" it :/

http://www.cb7tuner.com/vbb/showthread.php?t=197390

You've been served....

[bobbycos]

http://www.cb7tuner.com/vbb/showthread.php?t=197390

You've been served....

thank you for a good thread

[wagon-r]

Here's the new bisimoto level2 specs
Exhaust lift................. .403"
Intake lift.................... .389"
Exhaust open BBDC..... 41º
Exhaust closes ATDC... 1º
Intake opens BTDC....... 4º
Intake closes ABDC...... 44º

Calculated @.050"

Exhaust duration.......... 222º
Intake duration............. 228º
Exhaust center............. 110º
Intake center................ 110º
Degrees overlap........... 5º

Nice post. However, I think you mixed up the intake and exhaust lift.