Looks like i started a good topic...
Yet again!

Its what we're all about tho... learning new stuff.

willy, get your head work sorted out.

Enlarge the inlets, deshroud the valves, maybe even go for unleaded conversion.... make the air flow better, its the best power gain.

Buy a spare head (I've got a spare 12g202 here ) and give it to Steve's dad.

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[NATHAN] -- Sold everything mini related and am back in big beautiful BMWs

Kev, not too many people know about those alternative, closer ratios from the 3 synchro's. The original gearbox out of my Black Mk 1 S has those ratio's, same ratio's as SC gears, very nice gear set on the road, especially coupled with 3.7 diff ratio. Do you which gears were actually different? I've never checked it and it's still all together. Steve

Not sure Steve, here's the guf on CR helical from Vizard's HTMYM.. p136
1st 2.568
2nd 1.780
3rd 1.242
4th 1:1

1st motion had 23T, 2nd gear 29T, 3rd gear 25T
Laygear (cluster) had 24,21,17,13.

Sounds like 1st gear outer ring and its hub was stock 3 synchro, as per the SC box.

HTH,

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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.

Head work yeah.
Whats a good head to start with?

Say what now with giving a head to reg? Is that for HIM to work on it, coz ive seen him a couple of times perched there with the die grinder.

Do all heads fit on 1098 blocks? Scuse my noobness.

What does a head cost, and what will the work done TO it cost?

Thanks Nath.

Thanks Kev, that will help, just need to find the corresponding numbers for stock box and S ratios. Steve

12G295 is THE best small bore head stock...rare as hell and expensive if you find one...~$600ish

Any of your other options are going to take a long time to port to make even close to the 295..

You probably have a 202 head on now..i'd say stick with that and work it so that it's comparable to a 295..

You could go a 12G940 (off a 1275) and pocket the block as well..

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Starlet Conversion:
http://www.ausmini.com/forums/viewtopic.php?t=15484

Here ya go...

Stock Mini 3 synchro:
1st 3.627
2nd 2.172
3rd 1.412

Cooper & S, 3 synchro:
1st 3.2
2nd 1.916
3rd 1.357

4 synchro standard
1st 3.52
2nd 2.22
3rd 1.43

Mk2 S
1st 3.3
2nd 2.07
3rd 1.35

Of course, all have 1:1 4th gear..

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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.

So doc, can these ratios be mixed and matched..... say you want the first ratio from 1 box, second from another box, etc etc??


willy.... ive got a spare 12g202 head sitting here..... its yours for 20 bucks. I WAS only going to use it for my own attempt at porting and polishing....

Yeah, Reg does some P & P in the cave...... not sure if its actually his "job" though. Steve will tell ya a price. My quoted prices are a little different to yours

Not all heads will bolt straight onto different blocks. You have an 1100, your head will be a 12G202. Different heads might not fit without modifications. As Mini Mad said, the block might need pocketing. This requires a full strip down of the motor so that 2 steps (pockets) can be milled out of each cylinder bore. This is to stop the valves from hitting the block and smashing to pieces.

Its cheaper for you to modify a 202

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[NATHAN] -- Sold everything mini related and am back in big beautiful BMWs

No you can't- it's not a Hewland or Holinger etc racecar box where you can slide different gears in.
Ratios are fixed for each set, as Mini cluster gears are all one piece- each set uses a different cluster.. and the 2nd & 3rd gears on mainshaft are matched to the cluster.

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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.

well, there goes THAT idea.......

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[NATHAN] -- Sold everything mini related and am back in big beautiful BMWs

Okkher so.

http://cgi.ebay.com.au/ws/eBayISAPI.dll?ViewItem&category=32072&item=4547217728

There you have a SC/CR gear set 4 syncro.
A tad under 1300 dollars.

Worth it?
Do they scrub out quickly?

For at the moment they would be wank value - one can only love the sound of a SC gearbox
Are these gears very loud? I've seen a few rexxies with SC gearboxes and theyre pretty loud! Would these be as loud?

Later on, i'll be acquiring a 1275 that i'll slowly modify to be a nicely stinking hot road donk.
Can i simply swap these SC gears over into the 1275 gearbox once i've (the machinists) finished working the titties of it?

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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.

willy, you're a tool. ther is simply no sch need for a SC ger set on the street. Too much noise, too bloody expensive, and... wait... You've only got an 1100. *Yawn* No 1300, no haed-work, no huge cam. You're better off spendin your cash on a 1275, some decent head work (i spent $1000 alone on the head) and a nice cam. Still no need for the straight cuts.

Or just learn to drive it as it is...

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Cheap, Fast, Reliable. Choose two.

Err... who told u that?

And dont u read things properly?

I wrote previously: " Later on, i'll be acquiring a 1275 that i'll slowly modify to be a nicely stinking hot road donk.
Can i simply swap these SC gears over into the 1275 gearbox once i've (the machinists) finished working the titties of it? "



Internet n00b.