Horsepower curve for the standard 1098

[MikeNash]

Dear all,

Does anyone have the power curve (power versus revs) for the standard 1098? Or even seen one? I know we're supposed to get 48 H.P. at 5200 (?) rpm but I suspect's only with a very good engine on a very good day. Unfortunately the Vizard in his bible "Tuning the A Series Engine" only gives curves for modified engines, and heavily modified at that.

Regards, MikeN.

[MarkyB]

Really? I thought there was normally a standard engine curve for comparison.

Edit; I just had a look, some graphs have the standard curve but not all. Some have measurements which may well refer to the standard set up.

[MikeNash]

Well Marky,
I've been right through Vizard and all I can see as standard curves are for the 850 (page 457 - only 20 HP at the wheels!),the standard 1275 (page 458) and the standard 1275 Metro (page 489). I'm blowed if I can find a curve for a 1098, but if you know where it , please give me a clue!
Regards, MikeN.

[bmcecosse]

Vizard doesn't over concern himself with the 1098 - since it was rarely fitted to Minis, but also because it snaps the crank if revved over 6,000. Just think of it as a 998 - but with less revs available......
Max torque for most versions was 60 ft lb at 2,500 rpm, rising to a giddy 65 ft lb at 3,500 rpm for the Mk III Spridget......

[MarkyB]

You are absolutely right Mike, I've just always read std. as 1098 as I'm more interested in the comparative difference of the modifications.