TRE-340 Fuel Pump Hose Adaptation

[NathanR]

Hello,

Planning out my TRE-340 install in preparation for turbo, going to delete my inline pump and run just the in-tank.

I recently learned that the pickup on the tank is 10mm but the TRE outlet is 8mm. I was curious how others have gone about installing this.

I don’t think there’s enough length to use a brass reducer. I’m considering printing an adapter out of PETG but would much prefer to have a more robust solution.

[roguetoaster]

Don't overthink it, it's a 2 mm difference, just use a hose.

Get a hose that fits the smaller fitting, and then warm it, expand it with a screwdriver or a socket or whatever you have that will work without damaging the hose, then immediately jam it on to the larger fitting. Leave it long while you work with it so there is some handling ability, and then cut it to the length you need before making the other connection.

[reelizmpro]

Many solutions to this but the most straight forward ones that worked for me are :

1. Cut the small end of the reducer shorter and use hose clamps. This means placing the outlet of the pump directly in front of the inlet.
2. Use a hose sized in between the outlet and inlet like rogue described. If the inlet is 10mm and outlet is 8mm...use a 9mm hose with clamps. Make sure to use submersible fuel hose.

[Panici]

2. Use a hose sized in between the outlet and inlet like rogue described. If the inlet is 10mm and outlet is 8mm...use a 9mm hose with clamps. Make sure to use submersible fuel hose.

Exactly what I did.
Submersible-rated Gates 27097 (3/8" ID) was what worked for my application, going from memory but believe I have an Aeromotive pump in mine.

[digger]

Are these more reliable than genuine Walbro's?

[Dj Buttchug]

TRE pumps are very good quality. I have used TRE pumps on my cars for over 10 years. They are quiet and reliable.

[VintX]

Hello,

Planning out my TRE-340 install in preparation for turbo, going to delete my inline pump and run just the in-tank.

I recently learned that the pickup on the tank is 10mm but the TRE outlet is 8mm. I was curious how others have gone about installing this.

I don’t think there’s enough length to use a brass reducer. I’m considering printing an adapter out of PETG but would much prefer to have a more robust solution.

I’ve done a few of these on turbo builds, don’t overcomplicate it and definitely don’t put anything 3D-printed inside a fuel tank. It’s not worth the risk.

Use proper SAE 30R10 submersible fuel hose, step it from 10mm to 8mm with a short section, and clamp it with real EFI clamps. If space is tight, a compact aluminum/brass reducer works fine as long as everything is secure.
When you’re going turbo, fuel delivery is not the place to experiment. Keep it simple, keep it reliable, and you won’t have to think about it again once it’s under boost.

[Northern]

For my TRE 255 (I think mine is a 255 but I don't remember?) I just used the hose that came in the kit. Had to cut the bottom of the bracket and I believe I used the hose that came with the pump.

I do not think highly of TRE. I have lost all reasoning behind why I think this, but I believe TRE branded products are branded chinese parts.
The best evidence I have right now is their TRE branded "bosch-style" and "seimens-style" injectors.

I bought a TI/Walbro pump to replace mine, but found that my fuel tank was full to the brim, so I didn't end up swapping it and can't comment on if it looks "real" or "fake".
The TRE has been in since 2016, so if they are knockoff walbros, they seem to at least work well.