2.5 promax fuel rail o-rings

[Chaz]

That is so very nice to NOT be irresponsible.......
Just a little bit of info.
PM injectors are the same pink tip as the 300X and the 300PM white tips are the same size just a color change.
If you know the correct pink tip size for the X it will save me work... ...and help us all.....

Chaz, I would be a bit concerned about buying them from fle-bay. I like to do these plenum 1 time! Certainly do not want to find out that the person on fle-bay sold me something that was round and rubber but not good..........for fuel.... I would prefer an injector vendor as a source.

Mr. Tee,
It's never just that easy ... but lets start from the beginning ...

The "pink" and "white" injectors are the same physical size Keihin ( Honda ) injector. The Pink is a "peak and hold" or low impedance and the "white" is a saturated or high impedance like the Deca style "pencil" injectors.
Useless information for O-rings, but I know people who have tried to mix and match the outcome ... not so good

90% of the O-rings .... come from China.


The AC industry went from black to blue and brown when they went to R-134 . However you can get R-134 compatible O-rings in .... black

As well as all color's for injectors .. including black

No matter where you buy from, they need to be Viton ( fluoroelastomer ) to live.

A Keihin stem is 7.5 x 10.25mm or .294" x .404" ( give or take )

A std fuel rail is just shy of 10.5mm or .415"-.420"

Which leaves you two ways to go ...

A 7.5 x 1.5mm https://www.mcmaster.com/9263k568

Or a #11 Merican https://www.mcmaster.com/9464k16

Both of which also come in brown .. https://www.mcmaster.com/o-rings

Which is a touch bigger, they are cheap enough in bulk ... so I keep both. Many aftermarket fuel rails are reamed just shy of 7/16 th's , so the Merican O-ring is a better fit ..

Clear as mud ... ????

[Capt.Insane-o]

I always pre assemble the plenum, clamp it in a vice and run the pump for 15 minutes to check for drips or worse.

[tux974]

Capt, I made a hand pump setup and put around 20lbs to check before bolting to block. If they leak they do around 12-15lbs.
Since my stuff sits for some time after building I hate to put fuel to them till ready to run.

[tux974]

Chaz, your killing me with that much rocket science info......
I give up, to much info for me......

[InjectorService]

Chaz, these should fit right?




If that's the case, to the original poster, message me your address and how many you want/need. I'll stick em in the mail for ya.

[Chaz]

Oohhh, good ta see ya usin fractions by-golly-there-ehh ...

[Dave Strong]

Oohhh, good ta see ya usin fractions by-golly-there-ehh ...

Now now Chaz stop picking on the Canucks. if i need a o-ring part number I'm hoping I can just give a brother a call? If i need to send some cannoli I'm good with that.

Dave

[InjectorService]

Well I had to convert it, I didn't want to confuse the Americans!

[Chaz]

Now now Chaz stop picking on the Canucks. if i need a o-ring part number I'm hoping I can just give a brother a call? If i need to send some cannoli I'm good with that.

Dave

Dave, not pickin, I just wanted to speak in his native tongue ...

Anytime brother, you know that ..

Matter of fact, Canoli's on me ...

One for you, one for me, and one for the injector guy who lives in N. America ..

Serving Performance Boaters North America Wide!

[Aaronhl]

5/16 ID x 7/16 OD fit on the brass/aluminum parts of the 3.0L 225hp fuel rail? Do they fit the 225hp 3.0L injector tops too?

[Aaronhl]

I took off the injectors and brass tube o-rings, noticed both were different in size, the fuel injector o-ring was bigger than what is used in the rail angle piece

The inner diameter of each of the fuel rail holes is the same though