Ducati Monster Forum

Moto Board => Tech => Topic started by: BK_856er on November 25, 2008, 01:46:39 PM

Title: exhaust test port size?
Post by: BK_856er on November 25, 2008, 01:46:39 PM
Anyone know the thread size of the exhaust test ports?

12mm perhaps?

The O2 sensor is M18.

I'm hoping to use a couple of the units below for dual-cylinder wideband logging.

BK

(http://i38.tinypic.com/abim1e.jpg)
Title: Re: exhaust test port size?
Post by: clubhousemotorsports on November 25, 2008, 02:27:32 PM
I do not know of the top of my head but if you contact the folks at www.bridgeanalyzers.com/
they do make adapters that work well so they must have the size.
Title: Re: exhaust test port size?
Post by: BK_856er on November 25, 2008, 05:24:44 PM
Quote from: ducvet on November 25, 2008, 02:27:32 PM
I do not know of the top of my head but if you contact the folks at www.bridgeanalyzers.com/
they do make adapters that work well so they must have the size.

I got home and confirmed the size:  M10x1.0

No go on my pictured adapter.

BK
Title: Re: exhaust test port size?
Post by: clubhousemotorsports on November 28, 2008, 05:52:48 PM
10x 1.0 is close but not exact FYI

I believe it is tapered pipe thread as well. I have re-tapped them to 10x 1.0 and have had no issues yet ......
Title: Re: exhaust test port size?
Post by: Howie on November 28, 2008, 09:15:46 PM
I think it is a Brittish Standard tapered pipe thread, 1/8" 27 threads per inch.  Don't let the 1/8" fool you, just remember Whitworth.  The diameter is just shy of 10mm.  Certainly close enough to run a 10mm. tap through.
Title: Re: exhaust test port size?
Post by: Capo on November 29, 2008, 01:04:20 AM
I always thought it was strange that there is no metric pipe thread, they adopted BSP.
Title: Re: exhaust test port size?
Post by: Howie on November 29, 2008, 06:54:55 AM
Quote from: Capo on November 29, 2008, 01:04:20 AM
I always thought it was strange that there is no metric pipe thread, they adopted BSP.

Seems to be the international standard.
Title: Re: exhaust test port size?
Post by: BK_856er on November 29, 2008, 09:11:25 PM
Thanks for the clarification!  I eye-balled the fitting against my tap/die kit, but obviously it was not a perfect match.  Good to know...

BK