According to the RTA calculations... its what the engine number says so its small

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Click here for the Turbo Conversion Thread!

Standard C/R for the 1098 (with the 12G202 head) was 8.5:1.
A little chamber work will easily get it down to 8.0.

Any 1275 head will bolt on, you just need to use the 9 studs you have now.
All 1275s here (except Cooper S) only had 9 studs.
BUT...
Unless you have a stock lift cam and/or worn exhaust valve seats, the exhaust valves may hit the top of the block.
With high lift cams it's often necessary to notch the block for clearance. See kazjim's thread for pics.
Also, serious chamber mods are needed to get the C/R down to 8.0, as 1275 heads have smaller chambers.
It is not always a simple bolt-on mod.

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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 if im going supercharge it im better off putting a 12g202 head on it and doing some chamber work cause i really like the idea of putting a supercharger on it one of supercharged850s mates kits sounds good.

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Cheers Dan

FIRST COMES THE MONEY, THEN COMES THE POWER, THEN COMES THE WOMEN.!!

what kind of cam do you think i should put in it?

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Cheers Dan

FIRST COMES THE MONEY, THEN COMES THE POWER, THEN COMES THE WOMEN.!!

But according to the RTA a P plater cant drive it because of the hairdryer and they to use the same formula for working out engine capacity for modified vehicles but who cares it's all good clean fun

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Roundies and Clubbies(except vans) are both ugly that is why I have Midas and a van
1293 Mini Midas Bronze,1275 Clubman van

I'd run with an RE13T, same as kazjim has now in the `998 stroker'..
Boostedmini is running one in his 1293 turbo now, as well. Good cam for forced induction.

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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.

Bloody Fantastic is how I would describe it Kev !

I've closed it up a little to 0.016" and that has quietened it a little, and only added a little camminess down low... it soulds a little like my old 12A Bridgeport now ... (Rump, rump, rump...)

Pulls from a flat-footed 2000RPM all the way to about 7000.. I dont want to take it any more than that.. even though it feels like it still has some in it !

Head, I'm running the 12G1316 (Same as a 940) , and although it was a lot of work initially, i think it is the better way to go.. heaps better ports (stock.. although mine are a little modified.. hey Kev ?) as well as a more boost-friendly compression ratio (Running 8:1 now with a de-compression plate..)

Good luck
J

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what type of pistons do you think i should put in it i found these
http://cgi.ebay.com.au/Mini-PISTONS-AND-RING-set-of-4-suit-1100-040-NEW_W0QQitemZ200000527827QQihZ010QQcategoryZ32072QQtcZphotoQQcmdZViewItem

i've got a duplex double row timing chain and doubler valve springs and lightened cam followers for the 998 will i still be able to use these.

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Cheers Dan

FIRST COMES THE MONEY, THEN COMES THE POWER, THEN COMES THE WOMEN.!!

Those Hypatec pistons are the same as kazjim is running (except his are +.060").
Benjamin is going to use them in his turbo motor, too.

Yes to the other question.

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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.

what kind of exaust do you think i should put on it a lcb or 3-1 type

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Cheers Dan

FIRST COMES THE MONEY, THEN COMES THE POWER, THEN COMES THE WOMEN.!!

Either is OK but I'd go an LCB on a 1098.

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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.

cheers guys for all your help

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Cheers Dan

FIRST COMES THE MONEY, THEN COMES THE POWER, THEN COMES THE WOMEN.!!