Need a sealed fuel pump housing connector setup

[lane_change]

 

[zbrown]

now that is good stuff

[theantirotor]

sweet jesus.  lets make a wooden fuel pump connector to test this!!

[Cryptic]

sweet jesus.  lets make a wooden fuel pump connector to test this!!

HAHAH! 

[Speedfab]

wooden fuel pump connector

WINNING!

[MPbdy]

I'm working on this right now.  I'm going to use a -8 bulkhead to run my wires through and fill it with gasoline safe epoxy.  Bolt the bulkhead in with stat-oseals and I have an extra $90 in my pocket.

I looked through all that mil-spec stuff about a month ago and I got a semi until I saw the prices.  Until I have a mil-spec budget they can pound sand.  An isolator that costs half as much as my entire fuel pump?  No thanks.

[Jordan Innovations]

I'm working on this right now.  I'm going to use a -8 bulkhead to run my wires through and fill it with gasoline safe epoxy.  Bolt the bulkhead in with stat-oseals and I have an extra $90 in my pocket.

I looked through all that mil-spec stuff about a month ago and I got a semi until I saw the prices.  Until I have a mil-spec budget they can pound sand.  An isolator that costs half as much as my entire fuel pump?  No thanks.

That's a really good alternative!  I dig it.

[mefarri]

Yea that's a pretty good idea.  I'm still in for the overpriced connector Jeff.  So get on it.   

[MPbdy]

I'm working on this right now.  I'm going to use a -8 bulkhead to run my wires through and fill it with gasoline safe epoxy.  Bolt the bulkhead in with stat-oseals and I have an extra $90 in my pocket.

I looked through all that mil-spec stuff about a month ago and I got a semi until I saw the prices.  Until I have a mil-spec budget they can pound sand.  An isolator that costs half as much as my entire fuel pump?  No thanks.

That's a really good alternative!  I dig it.

Stumbled upon some crafty old men on an SCCA board discussing it.  I guess its fairly common with them since it passes SCCA and NASA tech.

[Cryptic]

I'm working on this right now.  I'm going to use a -8 bulkhead to run my wires through and fill it with gasoline safe epoxy.  Bolt the bulkhead in with stat-oseals and I have an extra $90 in my pocket.

I looked through all that mil-spec stuff about a month ago and I got a semi until I saw the prices.  Until I have a mil-spec budget they can pound sand.  An isolator that costs half as much as my entire fuel pump?  No thanks.

Like this?
JEGS Performance Products 110561 - JEGS Fuel Cell High-Flow Bulkhead Fittings - $11.99
Fitting includes a jam nut and two poly-washers.
http://www.jegs.com/i/JEGS-Performance-Products/555/110561/10002/-1



Seems like a good thing to run the wires through

[MPbdy]

Very similar!  This was a long -8 bulkhead that I cut down and aggressively countersunk both ends.  I filled it with 5 minute epoxy from one side and let it wick around to the other so it didn't trap any air bubbles.  So far it looks very successful.  Its 5 minute epoxy but it has a 24 hour curing time so I haven't moved it yet.  The only downside is going to be the cardboard being stuck to it lol.  Also I prefer stat-o-seals to the plastic washers.

[mefarri]

Nice.  What fuel friendly wire did you end up using?

[MPbdy]

Honestly I have not heard of it being an issue on standard PVC insulated wire.  I am having a very hard time finding anything on google one way or another.

Everything I can find about PVC in general is that it has "good" chemical resistance to gasoline.  PTFE is Polytetrafluoroethylene which is PVC with Teflon mixed in as best I can tell.  PTFE has an "excellent" rating.  There is PTFE coated wire.  It is like $4 a foot I think for small gauge wire (not that it wouldn't be worth it).

Edit - The science experiment has begun.  I tossed a couple pieces of wire and a piece of efi hose in some 91 octane.  We'll also get to see if Gladware is gasoline safe

[mefarri]

Haha I'm not sure of the time frame it takes to do it.  Although I know I've seen pictures of the wire being broken down.  It swells, gets soft and gummy.

[theantirotor]

Honestly I have not heard of it being an issue on standard PVC insulated wire.  I am having a very hard time finding anything on google one way or another.

Everything I can find about PVC in general is that it has "good" chemical resistance to gasoline.  PTFE is Polytetrafluoroethylene which is PVC with Teflon mixed in as best I can tell.  PTFE has an "excellent" rating.  There is PTFE coated wire.  It is like $4 a foot I think for small gauge wire (not that it wouldn't be worth it).

PTFE IS teflon, a totally different plastic.  It isn't PVC mixed with teflon.


PVC wire does have decent chemical resistance.  Not as good as PTFE though.



http://www.vp-scientific.com/Chemical_Resistance_Chart.htm

Here is a chart with both PTFE and PVC resistance to various chemicals.

With gasoline, PVC is rated as "good" and PTFE is rated as "excellent"


http://msds.ergon.com/files/lion-oil/LO-UnleadedGasoline+Ethanol.pdf

If you look here, you will see some of the chemicals generally found in gasoline.  Its worth noting that PVC does fine with gasoline itself, but does not do well with most of the additives, while PTFE is "excellent."  These other chemicals are in small quantity though so maybe good enough?