G'day
Thank you for the comments.
I have done the engine transplant thing on MORRX, injected 6 port 13B and 4 speed auto out of a series 5 RX7 hence the name a mix of MORris and RX 7.
What I am doing now is researching what I can do to modernise the A series, a matching numbers car that went with good usable power would be magic.
I have sum doubts that the 948 could be made to perform well enough but there are some later pommy cars that have been imported with original 1098 engines.
Or would it be better to forget about keeping the original engine and just get a 1275 and work on that?
I like the idea of a twin cam Minor that has an A series not a Japanese transplant.
What I am after is a good usable cruiser, not a race car.
Your ideas would be appreciated.
Cheers
Graham
With a 948 block one can easily put in Mini Cooper 998cc flat top pistons. However, one would need 1098cc connecting rods (same length as 948, but the wrist pins are different). Using the 998 with 0.060" overbore, one gets a 1050cc engine. with good carburetion and valves (either a 1098 or 1275 head) one gets an engine with the same HP as a 1275, but without the torque. I add that this 998 set up (essentially a Mini Cooper Engine) is essentially square (bore equals the stroke) and so is highly efficient. It likes to rev high, and so is a real racing machine.
Short rods mean lots of HP at high revs and low torque. Conversely, long stroke means low end torque and lower revs.
The 948 was around for a lot longer than the 1098, and was used in lots of makes and models, so it has more applications. As it is under 1000cc it qualifies for racing in another class. It is also a very sweet and stalwart little engine. The 1098, a stepping stone to the 1275, has weaker bearings, poorer balance in my opinion.
948 and 998 cranks have a shorter stroke than a 1098. Late 1098 cranks have bigger bearings.
