Strange as it may seem, I have a real classic mini question. I'm about to have rebuilt a 1098 motor. Is it worth the cost of boring it out, say, 20 thou oversize? I assume theoretically you would gain torque and low rev power which, for a road car, seems to be what is needed. What sort of gain do you get? Is there any disadvantage in going 40 thou? Also, I have almost decided on a 1 1/2" SU with rich needle, improved flow head with maybe 9.5:1 compression, 3-into-1 extractors and an RC40 exhaust. Any comments?
Actual classic Mini question!
Mar 28, 2007
4 Replies
if the bores etc. are not damaged, I don't think overboring is worth the cost (of new pistons). The head and other changes wil give more gain. Maybe worth putting a better cam in while you're working on it?
FWIW, Theo van den Bogaard
Thanks, Theo. That is what I was thinking too. Would a Cooper S cam, or its the modern equivalent, be the go?
Graham
How about a big block chevy cam?
A friend of mine has accumulated some cam info:
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;-) the choice is yours
greetings, Theo van den Bogaard
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