If Mark is correct, and you have a TR6 head (especially the later one), I
can personally testify to the fact you can take a full 1/4" off it.
Wouldn't recommend it though...In fact I have one on my shelf that I keep
as a reminder of what happens when I get too extreme...
Went like stink tho. The one on the car now isn't nearly as radical...
iii
At 11:15 AM 2/24/99 -0700, Mark J Bradakis wrote:
>
>>From the info I have in my chart, it may be that the head on the GT6,
>being 3.550", is possibly a TR6 head and not the original GT6 unit.
>My vote is yes, you can mill the head that far to get the numbers you
>want, though getting some domed pistons may be the way to go.
>
>
>Application CR Thickness CC depth CC volume
>-------------------------------------------------------------
>GT6 Mk I 9.50
>GT6+ 9.25 3.450 0.425 34
>GT6 Mk III 9.25 3.32 .47 37
>(early)
>GT6 Mk III 8.0 3.40 .55 44
>(late)
>TR250, TR6 8.5 3.55 .60 48.5
>TR6 middle 7.75 3.54 .68 55
>TR6 late 7.5 3.55 .70 57
>TR6 race 1 10.25 3.375 .52 41.6
>TR6 race 2 12.3 3.295 .44 33
>GT6 race 1 10.75 3.31 .385 30
>GT6 race 2 12.75 3.22 .300 24.4
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