Needle valve size

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Scim78
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Needle valve size

Post by Scim78 » Tue Aug 11, 2020 8:14 am

Hi,
I need a new needle valve on my 38dgas ('78 se6a) What was the standard size?
Ray



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scimjim
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Needle valve size

Post by scimjim » Tue Aug 11, 2020 8:58 am

There’s only one size for the float chamber needle valve AFAIK?


Jim King

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scimjim
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Needle valve size

Post by scimjim » Tue Aug 11, 2020 9:01 am

Usually comes as a complete unit
95CEB856-C5B9-483D-820F-5EEF4F9A9CB5.jpeg
95CEB856-C5B9-483D-820F-5EEF4F9A9CB5.jpeg (189.29 KiB) Viewed 220 times


Jim King

SECURE DRY STORAGE FOR YOUR SCIMITAR

Current: SE5 (8Ball), 1400 1600 1800 Zetec ST170 powered SS1 (G97), 2.5TD SE5a (diesel 5a), 6 x random other SS1s.
Previous: SE5, 3 x SE5a, 2 x SE6a, 3 x SE6b, GTC, 2.9i GTC, 3 x 1600 SS1, 1300 SS1, Mk1 Ti Sabre, Mk1.5 CVH Sabre, TI SS1 (snotty), 1600 SS1 (C686CCR).
Chief mechanic for: 1400 K series SS1 (Megan3), 1400 CVH EFi SS1 (Grawpy), 1300 SS1 (Number One) & Sarah's coupe.
CURE THE FAULT - NOT THE SYMPTOMS

Scim78
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Needle valve size

Post by Scim78 » Tue Aug 11, 2020 11:30 am

Found these on Green spark plug website:-
Weber (Replacement) DGAS X-Drilled Needle Valve - 250
Weber (Replacement) DGAS X-Drilled Needle Valve - 200
Weber (Replacement) DGAS X-Drilled Needle Valve - 175
the numbers relate to the size I assume
Ray



Scim78
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Needle valve size

Post by Scim78 » Tue Aug 11, 2020 11:41 am

Image



gtcse8
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Needle valve size

Post by gtcse8 » Tue Aug 11, 2020 11:45 am

Ray I have a few NEW float chamber valves?.

IIRC the Weber drilling numbers relate to Metric drill sizes, so 175 is actually 1.75mm.

I have just checked a NEW Weber 250 valve and the 250 relates to the size of the INLET hole in mm.
The X-drilling is just to get the fuel past the moving needle valve quicker.

The one in Jim`s picture is NOT X-Drilled.
The one in your post IS X-Drilled, but NOT a Genuine Weber part.
The 38DGAS needle valve for Capri 3000 is listed as 79516.250 and has a 2.50mm inlet. :wink:

Mark


Mark Wilson. Garage sale everything must go. :cry:1 SE6b, 1 GTC Shell &1 SE6a shell & a Triumph Daytona. Also on YouTube :wink: lookup V8 Chevy https://youtu.be/lbpvDGAMY6g https://youtu.be/7xTrbr0ETSA https://youtu.be/K7HfYVd5Flo

Scim78
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Needle valve size

Post by Scim78 » Tue Aug 11, 2020 12:10 pm

Thanks . I'll order a 250 size :D

Ray



gtcse8
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Needle valve size

Post by gtcse8 » Tue Aug 11, 2020 3:51 pm

I have them in stock, £7 posted.


Mark Wilson. Garage sale everything must go. :cry:1 SE6b, 1 GTC Shell &1 SE6a shell & a Triumph Daytona. Also on YouTube :wink: lookup V8 Chevy https://youtu.be/lbpvDGAMY6g https://youtu.be/7xTrbr0ETSA https://youtu.be/K7HfYVd5Flo

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