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-   -   Holley: needle and seat indexing? (http://www.clubcobra.com/forums/all-cobra-talk/140307-holley-needle-seat-indexing.html)

tortuga 02-19-2018 08:28 AM
Holley: needle and seat indexing?
 
Saw an advert fr BLP bottom feed needle and seats which apparently feed the fuel to the bowls in a submerged position: the idea is to minimize fuel aeration as fuel is replenished in the bowls...

On researching these the subject of needle and seat indexing comes up; apparently opinions are that indexing the n&s achieves the same thing.

Any info on how this is actually done?

Thanks
Steve H
SPF 1764

spdbrake 02-19-2018 09:23 AM
It appears its much the same as indexing your spark plugs.

Marking the nut flats that coincide with the window on the on the needle and seat so it points towards the fuel feed side of the bowl.

See post # 4 for instructions.
BLP bottom feed needle and seats - Chevelle Tech

Indexing Needle and seats - Ask the Carb Guy

I imagine it could be beneficial if you road race you car (sustained high fuel consumption). Probably not so much Kmart parking lot.


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