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xb heads on a tuber motor
https://ukbeg.com/forum/viewtopic.php?f=8&t=1261		 Page 1 of 1
Author:  Robs [ 25 Jun 2009 19:58 ]
Post subject:  xb heads on a tuber motor
anyone done this ? if so who tapped the the breather holes ?
Author:  03 [ 25 Jun 2009 20:04 ]
Post subject:  Re: xb heads on a tuber motor
If you buy the >04 Sportster heads, they're the same as XB heads except they come drilled and are black/highlighted fins.

Edited to say- you need to use flat top lightning pistons with these heads, ie not thunderstorm pistons. I used them on my 97 M2.
Author:  Robs [ 25 Jun 2009 20:05 ]
Post subject:  Re: xb heads on a tuber motor
03 wrote:
If you buy the >04 Sportster heads, they're the same as XB heads except they come drilled and are black/highlighted fins.



I know, but I got some 2nd hand xb heads
Author:  03 [ 25 Jun 2009 20:07 ]
Post subject:  Re: xb heads on a tuber motor
Robs wrote:
03 wrote:
If you buy the >04 Sportster heads, they're the same as XB heads except they come drilled and are black/highlighted fins.



I know, but I got some 2nd hand xb heads

Sorry, can't help you then.
Author:  kevmean [ 25 Jun 2009 20:11 ]
Post subject:  Re: xb heads on a tuber motor
If you use the xb rocker covers you don't need to use the breathers on the side of the head....or is it just that you need to use the holes to mount the carb/throttle body?
Author:  03 [ 25 Jun 2009 20:13 ]
Post subject:  Re: xb heads on a tuber motor
kevmean wrote:
If you use the xb rocker covers you don't need to use the breathers on the side of the head....or is it just that you need to use the holes to mount the carb/throttle body?
Correct.
Author:  Robs [ 25 Jun 2009 21:29 ]
Post subject:  Re: xb heads on a tuber motor
kevmean wrote:
If you use the xb rocker covers you don't need to use the breathers on the side of the head....or is it just that you need to use the holes to mount the carb/throttle body?



yep for mounting the carb
Author:  pash [ 30 Jun 2012 18:33 ]
Post subject:  Re: xb heads on a tuber motor
Robs wrote:
anyone done this ? if so who tapped the the breather holes ?

I did mine myself. You need to spot face the casting as well.

Position of the hole is not too important, i.e. kinda in the middle is ok then tapped 1/2" UNC. There are precious little machined surfaces in the vertical plane to pick up on on a head already drilled... If you are getting technical, the height of the hole needs to be measured from the bottom face of the head as the head is about 20 thou shorter than the Thunderstorm or Lightning head however this fades into insignificance if you are pulling the squish down with Cometic type gaskets.

:D
Author:  kevmean [ 30 Jun 2012 19:03 ]
Post subject:  Re: xb heads on a tuber motor
Wow another timewarp post lOl
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