Hello Kai:
You omitted the 1622cc mkII MGA. It pulled a well-mannered 90HP @ 5,500 rpm
with 97LB FTof torque @ 4,000 rpm. Among other elements, the head used
MGB-size valves.
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Kai wrote:
snip---
> > Subject: Re: MGB TwinCam?
snip---
> > Ok here is some more thoughts to ad, and a little math. (my hypothesis
> for
> > power)
> >
> > (Specs of MGA, please correct if wrong...these are used as examples
only)
> >
> > MGA 1500 - 68HP, 77LB FT Torque
> > MGA 1600 - 78HP, 87LB FT Torque
> > MGA TC - ~105HP, 105LB FT Torque
> > MGB 1800 - 98HP, 110LB FT Torque (early MGB)
> >
> > So with an increase of of 100cc between the 1500cc and 1600cc MGAs, the
> > engines gained an extra 10HP and 10LB FT Torque. So that still holds
> true
> > with the MGB engine (early MGB) which gained an even 30 HP and 33
Torque,
> > with an increase of 300cc over the 1500 MGA. So I'll deduct 10 HP&
> Torque
> > from the TwinCam engine, and that would give me the approx. number of
> > HP/Torque gained if the engine stayed at 1500cc.
> >
> > MGA 1500 w/ TwinCam head - 95HP, 95LB FT Torque. (these are guestimates
> at
> > best). So if I then added 30 HP/Torque I would recieve the aprox.
amount
> > of power gained if it were an MGB engine TwinCam.
> >
> > MGB 1800 w/ TwinCam head - 125HP, 128LB FT Torque...or an engine that I
> > feel would equal the MGC. Of course...these are approx numbers based on
> > math and have nothing to do with all factors that contributes to
> power...I
> > would expect the final HP/Torque numbers to be about 145 each.
> >
> > Remember that a TwinCam head for an MGB would probally have larger
> valves,
> > and a large combustion area, thus MORE POWER (tm)!
snip---
> > Kai
> >
> >
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