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#142 Re: a15 block mazda head
Mattndew76 Posted on: 2016/1/13 18:03
Sorry.

Will keep it Mazda related.


#141 Re: a15 block mazda head
D Posted on: 2016/1/13 13:30
the Bimmer head is for the Austin A series not Datsun

we should chit chat on your thread for other options
lets keep this thread for mazda head candidates


#140 Re: a15 block mazda head
ddgonzal Posted on: 2016/1/13 7:58
You won't lose any compression if you change A12 head for A14 head. But A14 head only make 85 HP maximum unless extensive porting is done. The DOHC 16-valve head makes 104 hp bone stock.


#139 Re: a15 block mazda head
Mattndew76 Posted on: 2016/1/13 5:13
I have an A12 factory head with some mild port work and that is what I am going with on my Super charge build. I have to shop a new CAM.

The DOHC project is on an engine dolly, and will most likely sit as a display even after it is finished.

Its up to you on what direction you feel is good for your enjoyment.


#138 Re: a15 block mazda head
tboe0 Posted on: 2016/1/13 5:05
Would it be better to try and get a a14GX head ?
Or wold I loose too much compression and therebuy not be worth it? I guess you could machine a cupple of mmm. of it to retain compression but get much better flow?


#137 Re: a15 block mazda head
Mattndew76 Posted on: 2016/1/13 5:02
Nothing is bolt right up. With all of these DOHC setups you have to reroute oil and water passages, and block some off on the engine casting.

All of them take some in-depth work and massaging.


#136 Re: a15 block mazda head
tboe0 Posted on: 2016/1/13 4:57
Quote:
Mattndew76 wrote:
The K100 BMW bike head will fit the A12

http://twinkam.co.uk...


Like bolt right up?

Or do they have to go through those guys for a rebuild / conversion ? Caus they are fairly cheap on ebay, but through them its a little pricey ?


#135 Re: a15 block mazda head
Mattndew76 Posted on: 2016/1/13 4:41


#134 Re: a15 block mazda head
tboe0 Posted on: 2016/1/13 3:47
Sooooo... There isnt a DOHC for the A12 that doesnt require it to bore'ed ALOT ?

As the A12 that sits in my B210 ad the moment is the only one i've got, I would like to make it, the best it can be :)

But I live in Denmark, so turbo, isnt going to be easy to get legal, but headswap efi ect is OK..

And compared to fx a port job(which cost alot around here), this would be a better project :)


#133 Re: a15 block mazda head
D Posted on: 2016/1/13 3:09
Rob has built an early A12 using the early
Mazda B1 and B3 engine with 71mm bores

https://en.wikipedia.org/wiki/Mazda_B_engine#B1

Robs 8v A12 was to be fitted to a 1000 someday

B1 & B3s see 8-9k rpm @ speedway / circle track



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