Head Conversion Question??

[TO THE FLOOR]

Hi:

I have a morris cooper with a 1275 gt motor bored to 1293. Currently I have a 12G940 head on it. I decided to put on a AEG163 head, the cooper s one with the big valves... I already started tearing it down this afternoon and now I'm wondering if I will notice any performance improvement??

Thanks

[Vegard]

If they are both standard, then NO.

[mk1]

I agree with Vegard (Rare nowadays

If all other things are equal & the heads are not modified then there will be no noticeable performance improvement.

TBH nowadays, with good 163's becoming harder to find it seems a shame to put it on a mongrel engine just to see what it does. A better bet would be to find a later, cheaper and MUCH more readily available12G1805 MK3 S head, which also has larger valve sizes than the standard 1300 940 head and also offers no performance improvement over the standard item in standard trim

[TO THE FLOOR]

Thanks guys. This head has been sitting around here for about 15 years and I have everything so no cost. Sorry I have had a stroke so I can't remember it all but the engine has been done and upgraded with HIF 44 and and I think LCB on the exhaust with a straight pipe and supertrap. Cam is AEG 643. Car has been my baby for almost 40 years. Everything is new on the head and it may have been trimmed I just don't remember anymore. It also has S rockers instead of the sinterned ones. I figured it was kind of like getting a valve job done and now that I started pulling everything apart it's too late to go back. Actually, I figured it would be more of a shame to let it sit wrapped in a drawer in my garage without using it. Worst part for me is that since Sept 2009 I have only put 436 miles on the mini. Where does time go??

[mk1]

Hi To The Floor,

I'm very sorry to hear about your illness & hope that you are making a good recovery.

As you say, getting it on an engine is probably more important that "preserving" it for the "right" unit.

I would be very interested to hear what difference it makes or indeed, how well it goes.

Best regards, mark

[TO THE FLOOR]

After reading Vizard today I would say the 12G940 has a better chance of being modified. Found it off Minimania from a guy in Florida (from Britain) who was all into flow testing the mini heads, and was looking to keep his business afloat. I think he was modifying it for me but now I don't remember. The S head I think I also found off of Minimania...and really don't remember the details except I had it shipped from the UK and "it was done". Well really I don't remember much of either and never wrote anything down...so who knows. It's gone now.

If I didn't tell a friend (with 12 more years into the minis than I) to come over and hang out while I worked on this...I would be done by now. But, I'm giving it a week or so and all the little doctors a chance to give me back my license cause when the mini is done I'm going out driving. There are enough idiots on the road...one more won't matter.

[mk1]

There are enough idiots on the road...one more won't matter.

That's always been my policy

[TO THE FLOOR]

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Finally finished on the 4th, and topped it off with a Minifin rocker cover today.