Well I wondered how Barney the 998 leapt tall hills in a single bound..
Just stuck some welding wire down #1 & #2 bores, found there's a 1098 crank hiding in there!
Combined with a late 998 smog head (small valves) torque is obviously `adequate' to quote Rolls Royce (at low revs anyhow).

Painting the 1293 motor this week, so his heart transplant will be soon!

Moral of story- never judge a motor by its (99H) engine number....!!

<edit> typos

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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.

doc i dont really understand how you did the welding wire thing

did you measure the distance from TDC to BDC or something like that?
if 1098 crank, does it mean that its got a shallower/deeper stroke than a 998 crank

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Inconspicuously Conspicuous
Appreciation without Depreciation
forever chasing clearer skies...

Duc,
With any 4 cylinder inline engine the #1 & #4 pistons are up when the #2 & #3 ones are down.
So, you turn the motor over until #1 is at TDC, #2 is at BDC.
Stick a slightly curved bit of welding wire in thru the #1 & #2 plugholes (curved so it will touch the head of the piston, not the dish) and measure the difference in length. That is the stroke.
Only real difference between 998 & 1098 motors is the stroke- 998 is 76.2mm stroke, 1098 is 83.7mm.

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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 thats how you know about the crank eh

how does one measure the volume of a block? eg 998cc
would you put one cylinder at BDC, measure how much water can fill it up (or even better, acid)
and multiply by 4?

_________________
Inconspicuously Conspicuous
Appreciation without Depreciation
forever chasing clearer skies...

Formula:
Displacement= (Pi * D2) /4 x Stroke x 4 (no of cyls)
Dimensions in Centimetres
For a 1098, it's (3.141625 x 6.46 x 6.46)/4 x 8.37 x4

Filling the cylinder with water or whatever gives you capacity, which is different- it's the displacement + combustion chamber etc volume.

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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 it has a higher compression ratio than you would have expected?

What a Bonus...bad luck Anton

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Stop Licking the Dog...I Don't Care Who Started It

No idea what the C/R is, maybe a little higher, but the valves & ports are small.
The motor was rebuilt a 3 or 4 years back by Mini Kingdom, then it sat in Wayne's garage until he finished the body & fitted it last year.

It would go even better with a proper 1098 (12G202) or 12G295 head. Dunno what I'll do with it yet, when it comes out at Xmas. Probably change the oil and park it, in case the 1293A+ is a lemon..

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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.

Sounds sweet Kev! I remember you telling me how Barney had more torque than expected from large pipe and a standard 998 Bonus

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Lillee - 1969 Morris Mini K

hmmmm.......

I am pulling the head off my 998 in the next few days Kev.....Might have a look-see in the bores and if it's no good....we might talk