I had the same trouble in year 2005 when I used copper head gaskets.
At full throttle I had blow by at the gasket at cylinder #2 and #3.
I have run the engine hundreds of miles on the autobahn at cruising speed
with no evidence of blow by but on the track the radiator was emptied within
5 laps.
I passed on to steel head gaskets and since then all trouble disappeared and
I never had any overheating.
I use a simple copper core radiator of the size the TR4a had and that works
very fine.
Cheers
Chris
-----Urspr|ngliche Nachricht-----
Von: fot-bounces+tr4racing=googlemail.com@autox.team.net
[mailto:fot-bounces+tr4racing=googlemail.com@autox.team.net] Im Auftrag von
KENMUN@aol.com
Gesendet: Sonntag, 8. Juni 2008 22:38
An: fot@autox.team.net
Betreff: [Fot] cooling down a tr3
fot, just returned from a frustrating week end at sebring raceway. the
racing was on a 1.7 mile course with a lot of time in 2nd/3rd gear and not
many
long straights to cool down. the car would run 7/8 laps with the temp going
up
on every lap. air temp was 90f+. when the gage was full scale (230f+) i'd
come in. with a 7# cap the water was immediately boiling when i turned the
car
off, with a 16# cap when i turned the engine off the hoses blew off. i've
got
the original size rad with a modern 5 row core. it's fairly well sealed so
the
air has to go thru the rad. the oil cooler is mounted in the grill opening
with a shroud between it and the rad. in three years of trying this,
overheating remains my top problem. is there any ultimate solution? thanks
for any
comments or advice. ken m tr3 vintage racer
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