Dean_Fuller

Why should teflon tape NOT be used??? I just replaced the fuel lines and used it everywhere. Please advise.

SteveG

"Search" is your friend. It was discussed here and in other threads. Briefly, it depends on the way it is applied (cleanly) to the threads. Any pieces that can flake off into the lines, will Murphy into the injectors.

Jim bailey - 928 International

The fuel line fittings are all a ball and socket type seal. What SEALS is not the threads but the ball or half ball with a hole in the middle into the machined cone. The tape should not hurt anything.

Charley B

I thought it might plug the hole.

Jim bailey - 928 International

I guess if you wrapped the tape over the open end of the fuel line (the ball) that would not be good.

ROG100

Firstly thank you for your patience and support.

I did persue the option of using an O ring seal but was not 100% happy with the setup for general sales to those not as mechanically savy as some of you. I needed to feel 100% that the adapter would do the job it was meant to do. Thanks to the engineering and machining expertise of Mike Simard at Simard Engineering, Mike has produced a design that provides a sealing interface with the injection rail as it should be. The prototypes are ready and Mike has one already fitted to his own car and I will be doing likewise once I receive my adapters.

For those of you that placed orders for the FPG when I initally announced the product I will honor the original price of $34.95 and drop the core charge for the nut.

The adapter will cost more than I originally hoped, however you pay for quality and peace of mind.
Once the first batch of orders are complete the price will rise to $39.95.
We are still 4 to 6 weeks away from delivery, maybe sooner if we are lucky. Once I am certain of delivery of the adapters I will contact everyone who place an order to see if they still want to go ahead. I will fully understand if they do not - no questions asked 8>)

Thanks,
Roger

Brett928S2

Hi

For what its worth...PTFE is used to seal joints on Nitrous systems...

We don't use tape....we use the liquid form...which you can get a tube of from your local plumbers for a few £/$s

With Nitrous it has to withstand pressures of in excess of 1000 psi...so our fuel pressures in the 40s are no problem...

So for anyone who wants to be absolutely sure of a seal on any joint with metal threads..use liquid PTFE...

You only need a smear to seal a joint....

Tape is not used because as someone said, bits can break off and block a Nitrous injector.

All the best Brett

P.S... I have a Fuel Transducer in the end of one my fuel rails and both run a fuel take off for my Nitrous and both are sealed with liquid PTFE....

SharkSkin

Nice -- too bad I don't have a fuel rail.

Would be very useful if it could be attached via a tee fitting at the WUR on CIS cars though... I bet it could be done with standard, proper fittings. There is so much pressure in the CIS system that it's a hazard just cracking it open to get a test gauge on there. It would have been nice to have recently when I was troubleshooting some issues with my car recently, I could have eliminated fueling issues at a glance(well, after a warmup cycle anyway)

dr bob

FWIW and only somewhat related: I use a 1/4" tube compression sleeve (a hardware store plumbing part) inside the original nut to make the seal the same way the original ball does. The brass ferrule is like a ball with a hole in the middle. Sleeve goes inside the nut, a toothpick through the gauge hole to keep the sleeve aligned, and the nut is then screwed onto the end of the fuel rail. Once that's snugged, the gauge plumbing gets attached to the nut. The brass is soft enough to form itself as needed to make the seal, without excessive torque and without having to screw the nut on until the threads bind up (for those using thread sealing tape or paste).


I bought a cheap fuel pressure gauge kit from H-F a year or so ago. One of the connecting hoses has 6mm straight male threads with an o-ring seal. I drilled and tapped a spare cap with that so the supplied hose goes right in. The 6mm stub of the hose connection sticks out into the cap far enough to hold the little compression sleeve I mentioned above without any assistance from a toothpick. I'm not at all a fan of having a gauge permanently mounted on the rail, BTW.

WICruiser

Roger

Thanks for the update on this item. As has been said by many before me you are a class act.

It is hard to find anyone these days that is willing to do it over, and over until there is confidence that the product that they are producing is as good as it can be.

I was not planning to return my cap for the core charge because like Dr. Bob I am not a fan of a full time fuel gauge installation.

ROG100

UPDATE

I received the first adapter from Mike and it is exactly what I wanted to see.
Fits and seals on the rail perfectly and emulates the ball as the sealing medium.
Waiting for the production run and we will be good to go.

Dannyfumi

Roger,

I will take 2, for the 85 and 87! Please ship to me when they are ready.

Thanks,

Dan

mark kibort

did you make it out of a stock fuel rail nut, and then make the ball with a hole in it? Looks great. Now, that I would leave on the car. currently, i have the fuel gauage that just seats on the adapter it comes with. It does leak slightly. I use it to check fuel pressure when tuning, but dont feel comfortable leaving it on without one hand on the fire extinguisher. as Jim mentioned, the threads are not supposed to make the seal.

ROG100

Hi Mark,
The ball is inside the special machined adapter. It is machined into the adapter. Monobloc.
Never seen a leak on the older style where we drilled and tapped the original nut.
This emulates the original seal 100%. If the original nut did not leak neither will this.
Up to the personal user if they want to leave it on there permantly or not.
Roger

PorKen

A cap with a Schrader valve/cap would be nice. Can he make that? Then you could use any old fuel pressure gauge only when you are doing testing, plus bleed off pressure easily.