I was perusing another forum and I seen this......


It would be an interesting challenge to fit carbies to it......of course the
lower holes would need plugging.

that would be very interesting to get running and attached..

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Bluey-1973 Clubby - 1330, high lift, big cam, 7 port madness in progress..

Gumby-1978 Minivan, British Racing Green - 1310, high lift, mild cam, enlarged porting and chamber shape with big valve head, supercharged build in ever slow progress!

That pic has been around for years... on here too.

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R.

If GR had one of those I bet it would go missing too.

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No speakers, no bodykits, no six-inch spacers, no spak filler, no bullshit

Now you can all see why 8 and 7 port heads were made for Minis...

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R.

Thats quite a nice inlet angle, no steep curves or right angles. Just a nice flow.

Not as good compared to a 7/8.

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Simplify and add lightness

Ah, split Webbers

Dicko

Waste of 1 good 45 Weber these days.

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R.

Doug Trengove did a head similar for one of his cicada clubman cars he built in the late 60's. The eng was a 1275 sprite and when he cut the head out he angled the new ports down to blend half way into th existing ports. He opened the whole port out and where it broke into the water jacket he welde a piece in to re-seal.
The new port had a spliter welded in and then shaped outwards to form a dual port. That way he ended up with 4 inlet ports with twin webers.
A lot of stuffing around but it worked well. I know he did a couple more and his son colin ran one on his mini he raced. They worked but a lot of effort to make.

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Research is the difference between speculation and investment. Anyone who copys some one else will always be second
www.minisprintgt.com

Manx (on the Isle of Man) used to do a 4 inlet port conversion (split ports) on 1275 heads, but the ports were still horizontal. Twin Webers were used.
However there wasn't room to make the ports a decent size.

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R.

Manx:




Looks like it has square ports?

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No speakers, no bodykits, no six-inch spacers, no spak filler, no bullshit

The intake look like a big rectangular trumpet.

Manx just ground out around the push rod holes and squared it up. The ports in the head don't have spliters to separate the inlets.
When Doug did his he cut the port out into the water jacket and fitted tubes for the push rods with a full spliter plate. a lot of stuffing around ,but in the 60's he did not have 16 v/v twincams cheap and available. Ardern's were around but cost as much as you could buy a car.

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Research is the difference between speculation and investment. Anyone who copys some one else will always be second
www.minisprintgt.com