221 Build

70' XW

New member
Ive got a stock 221 that was rebuilt a while ago, and has only done 36,000 miles since. Im looking for more power, so id thought id go for a 2v head. Id get it ported and set up for unleaded, and maybe a new set of stronger valve springs. This plus a 350 holley on the alloy manifold and a good exhaust should give all the power a P-plater will need. But just incase im wondering about a cam. Id like to use a Crow, but anything will do. One more designed for torque is good cause its what you feel, HP is just what you read. Got any ideas for one that will compliment this combo? The motor will be coming out of the car, but how hard is it to install the cam? And with all this, how much hp/torque will i be looking at from this combo? Cheers
 
70 xw -
is it an auto or manual ?
cause that effects how much cam you can put on them for the street (with out going hi stall converter for the auto)

the best thing would be to contact crow with all your specifics and let them choose .

i'd hazard a guess about 160 - 170 hp at the engine.
the 250 ci 2 v's were rated at 170 hp (think that was gross hp) so with head work ,and a small cam on a 221 should put you in that ball park -

brett

melb
 
Cheers mate.Its an auto. I dont want to use it for draging or anything, but if is going to affect the stop-start ability then fair enough. How hard is it to install the cams on these motors?
 
It's pretty easy to fit the cam. You just take off the timing cover, sprocket and chain, line up the new cam, and hit it in with a dirty big hammer, so it forces the old cam out the other end like a sausage machine.

:roll:

Actually, it's a job best done with the motor removed and upside down. Also note there are several possibilities for cam bearing outside measurements, particularly around the 221 era. ACL can supply whichever set is needed, but remove the old ones to measure first.

With distributor gear wear problems on new cams a little too common, I'd suggest a regrind on your present cam. There's a bunch of regrinders to help here - Wade, Crow, Watson, Tighe, Waggot(s) - off the top of my head. Also get the lifters resurfaced if they have otherwise worn well.

With probably fairly low static compression, a mild cam is really the best choice. Going over 274° advertised duration would be pushing it...

Convert to electronic ignition in some form - whether a points-triggered Bosch or MSD module, or the full XE type distributor with a larger pilot shaft fitted.
 
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