Tim, I have actually seen TR 3 & 4 engines go as high as 92 mm jugs &
pistons. Just make sure you don't deck the block too much. Same goes for
milling the head. If you want some professional help Daryl Uprichard of
Racetorations has done this quite often. Ken Gilanders probably has too so it
might help to visit with them on what size fits what you are going to use the
car for. I have one of Daryl's engines waiting on me to finish the body
work. I elected to use the 89 mm because the 92 mm makes for some pretty
narrow spaces between the jugs. Daryl ran the 92's in his race cars. As you
can imagine they will significantly increase the kick in the pants when
you hit the gas pedal. Especially with one of Larry's cams. Just make sure
you have the right fuel pump to keep up with the demand. Of course all the
other things need to be balanced as well. Needles in the carbs, intake
and exhaust valve size and some decent porting and polishing on both sides
make a difference. My recommendation is to gather as much info going in and
then have the engine dyno tuned. You will be much more pleased that just
what us mere mortals can do in the shop.
Cheers, Gary
In a message dated 2/11/2010 11:56:05 P.M. Central Standard Time,
billb@bnj.com writes:
I don't think so. I've only used them in racing applications though. I'd
probably leave the compression ratio at 9.5 so you can get by with pump
gas.
On Feb 11, 2010, at 5:23 PM, Tim Murphy wrote:
> I'm planning on rebuilding the engine in Ryan's street 1964 TR4. We're
> thinking of putting a set of Ken Gilanders liners and forged pistons in.
Is
> there any downside to using the 89 mm liners versus the 86 or 87 mm
liners?
> If the 89 mm liners are used is there anything else that would have to be
> changed? The car has the Stromberg carbs and he has already put a 4
into 1
> header on it some time ago. Had to, the cast iron exhaust manifold
cracked
> in half. We've already gotten one of Larry Young's 270 cams for it and
plan
> to mill the head slightly. The 89 mm liners would bump the CR up to 9.5
> with the stock head and I was thinking of milling it to go to 10 to 1.
I'd
> appreciate any thoughts/advice from the group on this.
>
>
>
> Thanks,
>
> Tim
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