The mother of all Big Blocks - 11tybillion HP!!!

[HoonBoy]

ok, i may just be a retard, but on the off chance im not im going to ask if im rght about this.

do the two intakes feed cylinders 1,2 and 3,4 off a common port?

and similar story with cylinders 2,3 with the central exhaust port?

cos if so people from the olden days are waaaaaay far out crazy.

Yep, and performance cams for them have different timing for each cylinder. It may be weird, but I would love to have another mini!

[Paydirt]

A BMW bike head can be made to fit.

Yeah the K1 head. My old man is hopefully doing this conversion in the near future. 120-130hp with a near stock 1275. I can't wait. Should be a fun little exercise.

[F|sh]

yeap its called a Scatter cam.

Vizard is a smart man! Have one of his video's somewhere for the B series

[TK]

Believe it or not the exhausts on those things ain't that bad, they fire at 360 degrees crank rotation to each other so they don't interfere much.
The exhaust's are actually good enough that you need quite a good inlet port job to justify much more than a basic port on the exhausts - coz the fuckers don't rev (small bore, long stroke) if they have too good an ex port they over-exhaust & loose midrange torque (well, if you can call it that).
The larger engines (1275-1340) are not so bad - closer to square, so they need a little more ex port work.
Intake bowls are horrid - bowl comes up to the seat at 90 degrees - no bottom cut whatsoever, so they flow shit at low lift, unfortunately the rocker ratio makes it impossible to get much lift into them - the only solution is to fit larger valves, which are then shrouded by the chamber edge - but it's still the lesser of the evils.
Getting them to flow on the intake side is a juggling act - valve size vs shrouding vs bottom cut length, can do your head in untill you figure it out.

TK

[tortfeaser]

Anyone got any idea what a EN40B 1275cc crank is worth? I've got bills and parts, need to get rid of both.

[Lurch]

Old mans 1380cc engine in his Bugeye used to see 9000rpm occasionally...
They are not as horrid as the uninformed comments in this thread make them out to be.

Is that yours Lurch? What is the rear main story?

I wish is was mine... It's Simon Gardners car - his wife runs it in the MG series.
Rear main on the standard A-series are just an basic oil slinger - I belive Simon converted it to a proper oil seal with a new backing plate.

Anyone got any idea what a EN40B 1275cc crank is worth? I've got bills and parts, need to get rid of both.

Mini or Sprite? If it's North/South, PM me...

[tortfeaser]

I wish is was mine... It's Simon Gardners car - his wife runs it in the MG series.
Rear main on the standard A-series are just an basic oil slinger - I belive Simon converted it to a proper oil seal with a new backing plate.


Mini or Sprite? If it's North/South, PM me...

Yeah, was interested in the details, I've had enough of the oil seal probs. Its a Mini one.

[Jim]

i used to work at a place that serviced and restored minis, mokes and other A series shitters. Yes you can get them to go pretty well indeed, especially considering the age and capacity. With minis the weak point is the gearbox and drop-gears, not the motor itself per se. In the old morrisses and sprites it's not quite the same problem as they use a "normal" box.

an equivalent capacity jap twin cam will shit on a BMC A series for power, but I tell you what, no jap twin cam sounds as good as a worked A series!

[itsnotagsr]

One of the best sounding BMC engines I've heard was a Healey 3000 that competed in last year's Dutton NSW. Couple of big webbers and the long EC straight was music to my ears! Can't beat a tough carby engine for engine note...