If I get a mechanical fuel pressure gauge, do I have to get an isolator? What else do I need?

Dima

 

Nope and I highly recommend that you don't get one. Give Rod at Wildcat Diesel or Merrick at Laredo Performance Diesel a call and they can hook you up with everything you need and nothing you don't.

 

I have been running an Isspro mechanical without an isolator for several years with no problems. However, I Do carry tools to fix any leaks that may occur. You could probably just install a needle valve under the hood to shut off the fuel supply to the gauge if there were a problem.

 

No isolator here.

 

I run ISSPRO with a needle valve. No isolator. If it springs a leak, I can turn the needle valve shut till I can get it fixed.

It's not going to leak though. ISSPRO is good stuff and I used a bulletproof line and fittings to do the connections with.

 

It was discovered with the Isspro gauge that if you run direct to it with your fuel line it will get a rattle to it. The simplest way to fix this is to install a small ball valve inline to cut the flow down to the gauge. Just keep opening the valve until you reach your normal FP at idle.

 

A ball valve is not the answer......it is too hard to control flow with a ball valve. A needle valve is what you want. Like this:

http://www.grainger.com/Grainger/pro...835780&ccitem=

 

This one is actually better Dr.
It's 1/8", the size most often used for automotive gauges and lines, no reducers needed. http://www.grainger.com/Grainger/pro...835462&ccitem=

 

I used the one Bill is speaking of.



Click on the thumbnail for a larger picture.

 

Sorry I meant needle valve.

 

Shovelhead,

Is that 1/4 S.S.? Do you happen to remember the length? Ive been looking for some reasonably priced S.S. braid but cant find any....Ill probably have to call Rod.

Thanks.

PS, Bill I just closed my eyes and picked a needle valve from the Grainger page

 

I didn't know the length.
I just called Rod @ Wildcat and he sent me a Stainless Braided line with -AN fittings that worked perfectly.

 

I run a isolator and I've never had a problem and My guage always works.

 

the only problem with not having a isolator and rigging up a needle valve ball valve if you spring a leak in your cab while bombing down the freeway at 70 mph how long is it gonna take to shut down your engine safely diesel leaking from behind an a-pillar or all over your carpet makes a pretty undesirable mess not to mention the smell

 

No isolator here