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Does anyone have pictures of the original fuel hose routing to the dual fuel pumps?

This is just for curiosity; my real objective is to use AN fittings. Any suggestions for this conversion would be great, as the problem I am running into is that the pumps are too close to each other.

Grazie

:)
 

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Does anyone have pictures of the original fuel hose routing to the dual fuel pumps?

This is just for curiosity; my real objective is to use AN fittings. Any suggestions for this conversion would be great, as the problem I am running into is that the pumps are too close to each other.

Grazie

:)
Hi Bisci,

The GTA parts book shows the original parts but not how connected (you have to imagine it) and of course no dimensions.

Roman Tucker tells me that he has reproduced these tube fittings, but likely to order only.
cIao

Ken
 

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Discussion Starter #4
Thanks Ken and Alleggerita

I really like the solid banjo set up, I will need to check if it has an AN fitting or if its metric.

Or I might call Roman to see what he offers.

:)
 

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Thanks Ken and Alleggerita

I really like the solid banjo set up, I will need to check if it has an AN fitting or if its metric.

Or I might call Roman to see what he offers.

:)
That banjo setup looks good but it also looks like it spaces the pumps too far apart for the standard 3 point GTA mounting on the 3 vibration pads.

I also wonder if the 2 pump banjo setup would be better if the pumps were solid mounted to as plate and the plate to the vibration mounts in order to reduce the stress on the banjo fittings.

FWIW

Ken
 

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Ken is right that the banjo set-up needs a 4-rubber pad set-up rather than the GTA 3 pad set-up. It is available with AN fittings - 6045-40 is described as having D-06 which refers to dash 6.

Interestingly enough, I do have a set of Bendix pumps with original GTA fittings that also are spaced apart for a 4-pad set-up. I am not sure what car it came from, but a TI Super or TZ-2 is a possibility.
 

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Ken is right that the banjo set-up needs a 4-rubber pad set-up rather than the GTA 3 pad set-up. It is available with AN fittings - 6045-40 is described as having D-06 which refers to dash 6.

Interestingly enough, I do have a set of Bendix pumps with original GTA fittings that also are spaced apart for a 4-pad set-up. I am not sure what car it came from, but a TI Super or TZ-2 is a possibility.

I think the TI super parts book called for a single bendix.

If the GTA fittings, you mention above, are readily accessable, could you picture and dimension them for me, (unless you want to sell them. (and the Pumps) as my GTA came sans pumps, fittings, fuel line.

Ciao

Ken
 

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Back in the day we ran a single Bendix "Gold Top" pump in TransAm on the #33 Thieriot car... we once had to cannibalize the race car pump to run the Chevy Transporter in order to get to the Laguna Seca race in '71... those were the days!
 

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Thanks Ken and Alleggerita

I really like the solid banjo set up, I will need to check if it has an AN fitting or if its metric.

Or I might call Roman to see what he offers.

:)

Bisci, Any more progress on this plumbing of the GTA dual fuel pumps. I am addressing the same problem. I wonder what the tubing diameter is on the fittings and if the in/out on the pump is 1/8 NPT. I have a NOS Bbendix 480534 with 1/4 NPT in/outand same specs as GTA pump( see below)

Do you have correct bendix pumps or are you using Facet and what part number.

The original pumps were # 476459, 12V Neg, 6.6-7.5 PSI shut off, 30 gpm wide open. (from the GTA parts book and Facet catalogue FP-16 1989.

Attached is a pdf of the GTA Parts book page showing the fittings in case you don't have it.

Ciao

Ken
 

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More Bendix Info for GTA and TI Super

Find attached 2 more pages from the GTA parts manual showing the exploded pump and the bill of materials. Also Attached is the TI Super bill of materials which is the same as that of the GTA except the quantity. GTAs used 2 pumps the TI Super 1.

Also attached are 2 pages from the 1989 Facet manual showing their pump specs by part number and a cut-a-way and pump curves.

Bendix pumps have the part number stamped on one face of the mounting flange and the voltage and polarity on the other face. On the back of the flange is another alpha/numeric stamping that could be a date code. Any one know how to read it??

FWIW

Ken
 

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Thanks Ken and Alleggerita

I really like the solid banjo set up, I will need to check if it has an AN fitting or if its metric.

Or I might call Roman to see what he offers.

:)
That Banjo set up is for the Blue Top (higher pressure, but same as GTA original) pumps which have 1/4 NPT fittings.

Banjo fitings are meant to thread into and pull up tight onto the gaskets and pump using a straight thread. This setup would appear to need the tapered NPT pipe threads to seal at the same time the banjo and gasket get tight onto the pump. Might work once IMHO.

Ciao

Ken
 

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Discussion Starter #13
Ken

Progress has been slow. My pumps have 1/8 npt fittings and I am using 1/8 npt to 6an adapters. Problem is - I have connected only one pump at present as I don't have the AN fittings necessary to link two pumps. A friend has solved the probelm using AN fittings; I will try to get pictures to post in this thread.

:)
 

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Ken

Progress has been slow. My pumps have 1/8 npt fittings and I am using 1/8 npt to 6an adapters. Problem is - I have connected only one pump at present as I don't have the AN fittings necessary to link two pumps. A friend has solved the probelm using AN fittings; I will try to get pictures to post in this thread.

:)
If I were going to do it using flare sealed fitting such AN/JIC 37deg, I would likely use fittings such as the Parker steel fittings shown in the attached. Fitting #1 and #2, to in/out the pumps and two fittings like #3 (total 4 req'd) to join the elbos and tees between the pumps. depending on spacing 3's could be joined with a pipe coupling or welded or silver brazed using a connecting tube. If I were going to weld or braze I would machine off the threads and again depending on spacing one might machine a tube and socket on the pipe thread ends for welding or brazing. Then you could connect a flex hose with An fitting to connect from the tank to the in tee and do an adapter to the steel fuel line forward from the out tee..

These steel Parker fittings are usually chromated zinc finish which I prefer over the more colourful auto after market supliers. Some of their fittings are also available in brass and stainless and from other manufactures.

FWIW

Ken
 

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Ken is right that the banjo set-up needs a 4-rubber pad set-up rather than the GTA 3 pad set-up. It is available with AN fittings - 6045-40 is described as having D-06 which refers to dash 6.

Interestingly enough, I do have a set of Bendix pumps with original GTA fittings that also are spaced apart for a 4-pad set-up. I am not sure what car it came from, but a TI Super or TZ-2 is a possibility.
Hi,

I am trying to reproduce the 2 fittings used for GTA.

Can you take some dimensions for me from the fittings that you have.

The tube diameter? 5/16 ??

The hex head size and the Pipe thread of the pipe fitting?

The dimensions from centre line of the pipe fitting to the end 90 deg tube.,

The dimension from the end of the pipe fitting to the centre line of the 90 deg bend.

Bend radius? The 5/16 tube bender I have produces about a 0.5" radius to the inside of the bent tube.

The location of the tee branch.

Are the dimensions of the single tube the same as the tee except for the tee branch addition? I expect they are.

Is it a silver brazed or welded construcion??

Zinc plated?

Bulge on tube ends? I figured out how I can do this.


I think the tubing is 5/16" dia and the fitting is 1/8 npt.

Ciao

Ken
 

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Hi,

I am trying to reproduce the 2 fittings used for GTA.

Can you take some dimensions for me from the fittings that you have.

The tube diameter? 5/16 ?? Yes, 5/16 outer diameter

The hex head size and the Pipe thread of the pipe fitting? Hex head is 9/16 or 13mm; pipe thread is 1/8"NPT

The dimensions from centre line of the pipe fitting to the end 90 deg tube.,

1 9/32" that's as close as I can get it

The dimension from the end of the pipe fitting to the centre line of the 90 deg bend.

Bend radius? The 5/16 tube bender I have produces about a 0.5" radius to the inside of the bent tube.

1/2" radius is close to what I measure

The location of the tee branch.

free end to centre of T-pipe is 3/4"

Are the dimensions of the single tube the same as the tee except for the tee branch addition? I expect they are.

Yes

Is it a silver brazed or welded construcion??

Silver brazed

Zinc plated?

Looks like silver cad to me

Bulge on tube ends? I figured out how I can do this.

Yes, the open ends are flared at the end, e.g. bulge


I think the tubing is 5/16" dia and the fitting is 1/8 npt.

Ciao

Ken
Hi Ken,

See above for the dimensions as close as I can get them off the fittings.

BTW, if you are making any, I am missing one regular elbow for a complete set on one of my pump set-ups. I'd be happy to buy one off you.

Also, you might want to talk to BBmember Dbest, who has made a set from scratch for his car.
 

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Thanks those dimensions will be most helpful.

There is one dimension that you didn't respond to :

-(The dimension from the end of the pipe fitting to the centre line of the 90 deg bend.) That is how far out is the tubing bend centre line from the end of the pie fitting (or the face of the pipe fitting).

And one more I failed to ask for: the length of the tee branch pipe?

The pipe fitting with the 9/16 hex may be a stumbling block and I may have to machine a special from 1/4 npt plug and cut an 1/8 npt thread onto it. Please measure the pipe thread fitting's length.

When I do my production run I will gladly make you the piece you are missing.

Ciao

Ken
 
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