Power equals heat - no way of avoiding that. A bigger or more efficient radiator is only part of the issue. Have to get heat away from the exhaust area and try and keep the transmission cool. Possible but difficult. The biggest problem with the 1500 is that it is never smooth. It's like going from a 6 cylinder to a 4 cylinder car. Same problem to some extent with the 1300 with the large crank. There is too much weight being thrown about in all directions by the huge crank for it to be as smooth as the 1147, especially at high revs.

The small crank 1300 is best - not quite as powerfull as 1500 but a lot more than 1147 and retains the smoothness.

Alternative is to tune the 1147, lots can be done. More info here:

www.amphicars.com/actengin.htm

David C




        
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