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Yes they will, but that isn=E2=80=99t really the problem. The extra stroke o=
f the TR6 motor makes building compression easy. The 2L motor is a little m=
ore challenging because of the shorter stroke. You just can=E2=80=99t shave=
enough off the head to get really high compression without getting into the=
water passages. Pop ups are necessary to maximize compression.
Chuck
> On Dec 6, 2021, at 6:40 PM, Bob Bownes -Seiri via Fot <fot@autox.team.net>=
wrote:
>=20
> =EF=BB=BF
> Hmm,
>=20
> Will a TR6 head fit? There is plenty of meat on those to get Ludicrous Com=
pression.=20
>=20
> Bob
>=20
>>> On Dec 6, 2021, at 20:58, Scott Janzen via Fot <fot@autox.team.net> wrot=
e:
>>>=20
>> =EF=BB=BFI=E2=80=99ve found the GT6 head has some thin spots and dependin=
g on the casting can=E2=80=99t take milling too much more than 11.5 to 1, ma=
ybe 12 if you get lucky with the right casting. As to the lore that circle B=
heads are the best, I have not found that to be correct in this respect. S=
eems like they are all over the map.
>> The rest has to come from domed pistons, which I have not yet tried, so t=
here=E2=80=99s probably some more HP to be found. =20
>> Before you mill a head, find a shop that can =E2=80=9Cxray=E2=80=9D it fo=
r you to tell you how thick the metal is above the cooling passages. When I=
had this done, they just marked the thickness directly on the head with a m=
arket. If memory serves, one of the thinnest spots is not quite outside the=
fire ring on the head gasket near #1. I had one fail there that got milled=
50/thousandths too much.
>>=20
>>=20
>>=20
>> On Dec 6, 2021, at 1:36 PM, McKearn McKearn via Fot <fot@autox.team.net> w=
rote:
>>=20
>> Now that we have the crank and rods figured out, how about we discuss mak=
ing compression?
>> I know this can be a sore subject and everyone has an opinion as to how m=
uch is enough or too much so where do we start?
>> I have built a couple TR6 engines that were in the 13:1 range thanks to m=
uch head milling and pop up pistons. Will the 2.0 litre engine be the same ?=
>> Thanks. P.J.
>> _______________________________________________
>> fot@autox.team.net
>>=20
>> http://www.fot-racing.com
>>=20
>> Donate: http://www.team.net/donate.html
>> Archive: http://autox.team.net/archive http://www.team.net/pipermail/fot
>> Unsubscribe/Manage: http://autox.team.net/mailman/options/fot/sjanzen@me.=
com
>>=20
>>=20
>>=20
>> _______________________________________________
>> fot@autox.team.net
>>=20
>> http://www.fot-racing.com
>>=20
>> Donate: http://www.team.net/donate.html
>> Archive: http://autox.team.net/archive http://www.team.net/pipermail/fot
>> Unsubscribe/Manage: http://autox.team.net/mailman/options/fot/bownes@web9=
.com
>>=20
>>=20
> _______________________________________________
> fot@autox.team.net
>=20
> http://www.fot-racing.com
>=20
> Donate: http://www.team.net/donate.html
> Archive: http://autox.team.net/archive http://www.team.net/pipermail/fot
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ail.com
>=20
>=20
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<html><head><meta http-equiv=3D"content-type" content=3D"text/html; charset=3D=
utf-8"></head><body dir=3D"auto">Yes they will, but that isn=E2=80=99t reall=
y the problem. The extra stroke of the TR6 motor makes building compre=
ssion easy. The 2L motor is a little more challenging because of the s=
horter stroke. You just can=E2=80=99t shave enough off the head to get=
really high compression without getting into the water passages. Pop u=
ps are necessary to maximize compression.<br><br><div dir=3D"ltr">Chuck</div=
><div dir=3D"ltr"><br><blockquote type=3D"cite">On Dec 6, 2021, at 6:40 PM, B=
ob Bownes -Seiri via Fot <fot@autox.team.net> wrote:<br><br></blockquo=
te></div><blockquote type=3D"cite"><div dir=3D"ltr">=EF=BB=BF<meta http-equi=
v=3D"content-type" content=3D"text/html; charset=3Dutf-8"><div dir=3D"ltr"><=
/div><div dir=3D"ltr">Hmm,</div><div dir=3D"ltr"><br></div><div dir=3D"ltr">=
Will a TR6 head fit? There is plenty of meat on those to get Ludicrous Compr=
ession. </div><div dir=3D"ltr"><br></div><div dir=3D"ltr">Bob</div><div=
dir=3D"ltr"><br><blockquote type=3D"cite">On Dec 6, 2021, at 20:58, Scott J=
anzen via Fot <fot@autox.team.net> wrote:<br><br></blockquote></div><b=
lockquote type=3D"cite"><div dir=3D"ltr">=EF=BB=BF<meta http-equiv=3D"Conten=
t-Type" content=3D"text/html; charset=3Dutf-8">I=E2=80=99ve found the GT6 he=
ad has some thin spots and depending on the casting can=E2=80=99t take milli=
ng too much more than 11.5 to 1, maybe 12 if you get lucky with the right ca=
sting. As to the lore that circle B heads are the best, I have not fou=
nd that to be correct in this respect. Seems like they are all over th=
e map.<div class=3D"">The rest has to come from domed pistons, which I have n=
ot yet tried, so there=E2=80=99s probably some more HP to be found. </=
div><div class=3D"">Before you mill a head, find a shop that can =E2=80=9Cxr=
ay=E2=80=9D it for you to tell you how thick the metal is above the cooling p=
assages. When I had this done, they just marked the thickness directly=
on the head with a market. If memory serves, one of the thinnest spot=
s is not quite outside the fire ring on the head gasket near #1. I had=
one fail there that got milled 50/thousandths too much.</div><div class=3D"=
"><br class=3D""></div><div class=3D""><br class=3D""><div><br class=3D""><d=
iv class=3D"">On Dec 6, 2021, at 1:36 PM, McKearn McKearn via Fot <<a hre=
f=3D"mailto:fot@autox.team.net"; class=3D"">fot@autox.team.net</a>> wrote:=
</div><br class=3D"Apple-interchange-newline"><div class=3D""><div dir=3D"lt=
r" class=3D"">Now that we have the crank and rods figured out, how about we d=
iscuss making compression?<div class=3D""> I know this can be a sore su=
bject and everyone has an opinion as to how much is enough or too much so wh=
ere do we start?</div><div class=3D""> I have built a couple TR6 engine=
s that were in the 13:1 range thanks to much head milling and pop up pistons=
. Will the 2.0 litre engine be the same ?</div><div class=3D""> =
 =
; Thanks. P.J.</div></div>
_______________________________________________<br class=3D""><a href=3D"mai=
lto:fot@autox.team.net" class=3D"">fot@autox.team.net</a><br class=3D""><br c=
lass=3D"">http://www.fot-racing.com<br class=3D""><br class=3D"">Donate: htt=
p://www.team.net/donate.html<br class=3D"">Archive: http://autox.team.net/ar=
chive http://www.team.net/pipermail/fot<br class=3D"">Unsubscribe/Manage: ht=
tp://autox.team.net/mailman/options/fot/sjanzen@me.com<br class=3D""><br cla=
ss=3D""><br class=3D""></div></div><br class=3D""></div><span>______________=
_________________________________</span><br><span>fot@autox.team.net</span><=
br><span></span><br><span>http://www.fot-racing.com</span><br><span></span><=
br><span>Donate: http://www.team.net/donate.html</span><br><span>Archive: ht=
tp://autox.team.net/archive http://www.team.net/pipermail/fot</span><br><spa=
n>Unsubscribe/Manage: http://autox.team.net/mailman/options/fot/bownes@web9.=
com</span><br><span></span><br><span></span><br></div></blockquote><span>___=
____________________________________________</span><br><span>fot@autox.team.=
net</span><br><span></span><br><span>http://www.fot-racing.com</span><br><sp=
an></span><br><span>Donate: http://www.team.net/donate.html</span><br><span>=
Archive: http://autox.team.net/archive http://www.team.net/pipermail/fot</sp=
an><br><span>Unsubscribe/Manage: http://autox.team.net/mailman/options/fot/c=
hasgee22@gmail.com</span><br><span></span><br><span></span><br></div></block=
quote></body></html>=
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_______________________________________________
fot@autox.team.net
http://www.fot-racing.com
Archive: http://autox.team.net/archive http://www.team.net/pipermail/fot
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