Ron_Stoppable

iTrader: (1)

ok i bought these holley ls fuel rails, this kit doesn't come with the block off plug for the unused inlet on one of the fuel rails, so instead of blocking it off i want to put a fuel pressure gauge there instead. im just confused as to what size thread gauge i need to order? the kit comes with fittings that are
-6 AN to 3/4-16 in. i want a pressure gauge that screws onto the fuel rail pretty much.

http://www.summitracing.com/parts/hly-534-209/overview/

ss1

iTrader: (32)

The 3/4-16 thread they list is actually an -8an o-ring fitting. So you'll need to find a fuel pressure gauge you like, then get an adapter fitting from -8an o-ring to 1/8" NPT (pipe thread) because that's what most of the small fuel pressure gauges use. Here is a pic of one. It may not be the right color, but it'll give you an idea where to start.

http://www.summitracing.com/parts/mrf-mp-3072

ss1

iTrader: (32)

Another option is to use one of the fittings that comes with the rails and a -6an male/female gauge adapter fitting with a 1/8" NPT female in the side. Then all you need is a 6an female cap to go on the end. This will let you swivel the gauge in the direction you choose.

http://www.summitracing.com/parts/rus-670343

http://www.summitracing.com/parts/rus-661963

Ron_Stoppable

iTrader: (1)

Ok cool, thanks guys. but the only thing im confused about is that i don't see the 1/8 size listed at all? would you mind posting a couple links to a gauge i could use?
http://www.summitracing.com/search/p...essure%20gauge

ss1

iTrader: (32)

Any of these 1-1/2" 0-100psi gauges will work. They all have 1/8"NPT threads. Take a look at the notes under the descriptions.

http://www.summitracing.com/search/p...20gauge%20fuel