The BSA A7-A10 Forum

Technical (Descriptive Topic Titles - Stay on Topic) => A7 & A10 Engine => Topic started by: anita on 27.07. 2010 17:38

Title: Cylinder head balance pipe!
Post by: anita on 27.07. 2010 17:38: Hi all, this is the cylinder head that we bought on Sunday, it came on the standard A10 barrels. Bob has asked if I could enquire why a single carb head would have a balance pipe on it, I want to know is it a balance pipe and what it might be from originally. Any light you could shed on this would be appreciated as it will be ending up on my A10 and I'd like to know what to tell people if they ask me!

(https://www.a7a10.net/forum/proxy.php?request=http%3A%2F%2Fi287.photobucket.com%2Falbums%2Fll127%2Fanitaws%2Fth_IMG_2158.jpg&hash=8e3336380761cb575296f138b2160082ecf218c3) (http://s287.photobucket.com/albums/ll127/anitaws/?action=view&current=IMG_2158.jpg)

There one more photo on my album but its a bit blurry
Anita
Title: Re: Cylinder head balance pipe!
Post by: bsa-bill on 27.07. 2010 18:15: Just a guess Anita - possible a vacuum gauge been fitted, no Idea why, more likely the pipe was fitted into the rockers to draw off pressure.
Some ( quite a lot ) of people seem to think there is an issue with A10/7 engines building up pressure in the rocker boxes, can't see it myself but each to there own.
there are four escape routes for pressure out of the rocker box back to the crankcase so my thoughts are a pressure problem in the rockers is a pressure problem in the whole engine and should be treated as such, never had any problems in this area myself
Title: Re: Cylinder head balance pipe!
Post by: muskrat on 27.07. 2010 22:05: G'day Anita,
is it a solid tube or a hose onto tube fittings? Looks like the PO tried to eliminate induction bias, don't think it would work.
Cheers
Title: Re: Cylinder head balance pipe!
Post by: Goldseeker on 28.07. 2010 09:37: Quote from: muskrat on 27.07. 2010 22:05
G'day Anita,
is it a solid tube or a hose onto tube fittings? Looks like the PO tried to eliminate induction bias, don't think it would work.
Cheers

I think you could be right there, interesting concept, wonder if it did work.
Title: Re: Cylinder head balance pipe!
Post by: bsa-bill on 28.07. 2010 09:45: Oops sorry I didn't see second picture, junks my theories
Title: Re: Cylinder head balance pipe!
Post by: anita on 28.07. 2010 19:44: Its a solid steel pipe
Title: Re: Cylinder head balance pipe!
Post by: Goldseeker on 28.07. 2010 20:56: Quote from: anita on 28.07. 2010 19:44
Its a solid steel pipe

Do you mean solid as in solid rod or pipe as in steel pipe?
Title: Re: Cylinder head balance pipe!
Post by: anita on 28.07. 2010 21:19: Its a hollow steel tube pipe, sorry didnt make it clear last time
Title: Re: Cylinder head balance pipe!
Post by: chaterlea25 on 28.07. 2010 22:39: Carrying handle ???? ???? ???? ????

*smile* *smile* *smile*

John O R
Title: Re: Cylinder head balance pipe!
Post by: wilko on 29.07. 2010 00:21: Yes, a carrying handle, i agree, they are heavy!!
Title: Re: Cylinder head balance pipe!
Post by: terryk on 29.07. 2010 10:59: I think muskrat is right someone has tried to sort out a bias problem they can be frustrating when it happens. I may have helped you never know.