A1 and A6 camshaft

[cmd cb7]

The a1 cam is a regular cam and the a6 cam is a wilder cam from stock and gets better rev and acceleration...I ended up swaping my head cuz its a better built head compare 2 the a1 and wit the a1 block you Will be impress with the performance you Will have

[deevergote]

The a1 cam is a regular cam and the a6 cam is a wilder cam from stock and gets better rev and acceleration...I ended up swaping my head cuz its a better built head compare 2 the a1 and wit the a1 block you Will be impress with the performance you Will have

The head castings are the same. There is no difference between the F22A1, F22A4, and F22A6 head castings. There is nothing to be gained from swapping the complete head.
Both the A1 and A6 cams are "regular". The A6 cam does have a different profile, which makes for a SLIGHT increase in power.

[H.M.]

Yes the A1/A4 are 3A and the A6 is 4B. Ive checked all 4 of my F22s, 2x A1, 1x A4 and 1x A6.

This thread = WIN!

[Oreellyfool]

This is great to know. Would have been nice to know when looking for a motor on CL since so many of them seemed to be in pieces and always looked like people had messed with them. So it would have just been a nice little check on top of the engine stamp.

[cloudasc]

The head castings are the same. There is no difference between the F22A1, F22A4, and F22A6 head castings. There is nothing to be gained from swapping the complete head.
Both the A1 and A6 cams are "regular". The A6 cam does have a different profile, which makes for a SLIGHT increase in power.

There is only one other difference between the a1/a4 heads and the a6, the valve springs are different, its a moot point, but they are slightly different.

[deevergote]

Yes... but that doesn't change the fact that the head castings are the same. That was the only point I was making. The A1 head is no different than the A6 head. Just the parts that are bolted on are different.

[H.M.]

There is only one other difference between the a1/a4 heads and the a6, the valve springs are different, its a moot point, but they are slightly different.

And from what I read in the "valve spring" thread, the only issue with using the A4 springs in the A4 head with the A6 cam would be a need to readjust valves 2x as frequently - every 15k miles instead of 30k IIRC.

Concur?

[cloudasc]

And from what I read in the "valve spring" thread, the only issue with using the A4 springs in the A4 head with the A6 cam would be a need to readjust valves 2x as frequently - every 15k miles instead of 30k IIRC.

Concur?

I don't think its that extreme, not if your only reving to 6.2-6.3k rpms all the time (thats where my auto shifts when WOT [I also have Bisi Springs]), if you were taking it up to 7k all the time, or using a reground cam checking/adjusting them every 15k miles would probably be a wise thing to do.

[Tabor]

I don't think its that extreme, not if your only reving to 6.2-6.3k rpms all the time (thats where my auto shifts when WOT [I also have Bisi Springs]), if you were taking it up to 7k all the time, or using a reground cam checking/adjusting them every 15k miles would probably be a wise thing to do.

This is probably true. It is also probably true that most of these cars haven't seen a valve adjustment in years. I wouldn't worry too much.