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?

On Wed, 28 Mar 2007 11:29:55 +1000, "GrahamL"
<grahamlyons (AT) internode (DOT) ton.net> wrote:

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

<t.a.j.m.vdnbogaard (AT) uvt (DOT) nl> wrote

Thanks, Theo. That is what I was thinking too. Would a Cooper S cam, or
its the modern equivalent, be the go?

Graham

GrahamL wrote:
How about a big block chevy cam?

On Thu, 29 Mar 2007 08:27:08 +1000, "GrahamL"
<grahamlyons (AT) internode (DOT) ton.net> wrote:

A friend of mine has accumulated some cam info:
http://members.home.nl/jeroen.kuijf/technopics/Camshafts/nokkenassen.xls

;-)
the choice is yours

greetings,
Theo van den Bogaard