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Old 06-26-2015, 02:38 PM   #1
wpbarlow OP
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Triumph Come Home National Rally Oley Pa. 2015

I can't say that I'm nuts about old or real old Brit iron (Beezump triples, Comandos, Velos, and RE Interceptors excepted): but I have a very high fun route to the Oley area, so I go most years

First , a question.

What is the purpose (if there is one) for backward cylinder heads? I can see a possible advantage of the exhaust having a straighter shot; but suspect that would be offset on an air cooled bike by the reduction in cooling for the hottest part of the motor.








Ok, test over, enjoy


















































































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Old 06-26-2015, 02:43 PM   #2
wfrpalm
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Cool, thanks for posting the pics.
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Old 06-26-2015, 05:50 PM   #3
bk brkr baker
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The reversed head was an early attempt at "Ram Air Induction" ,grasping at straws for a boost in horsepower for the drags and dry lakes.
When it didn't really change the world , the custom guys picked up on it and did the mod because it was different and "custom".
Do I get a "T" shirt ?
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Old 06-26-2015, 06:00 PM   #4
wpbarlow OP
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Quote:
Originally Posted by bk brkr baker View Post


The reversed head was an early attempt at "Ram Air Induction" ,grasping at straws for a boost in horsepower for the drags and dry lakes.
When it didn't really change the world , the custom guys picked up on it and did the mod because it was different and "custom".
Do I get a "T" shirt ?
That's what a couple of guys at the show said; but it seemed to me that once you put a filter on you'd lose much of the ram effect. Unless they ran them w/o filters- which I'd think would lead to short engine life

Anywy, take a gold star out of petty cash
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Old 06-26-2015, 06:24 PM   #5
motu
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Triumphs had twin cams and a symmetrical head stud pattern, so it was pretty easy to do. The barrel flange was symmetrical too, so you could flip the whole top end on a unit 9 stud....although they had a pressure feed to the exhaust tappet.
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