Fuel Tank/Lines Help

for questions and answers about alternative power transplants on the T25, GTi, Porsche,Subaru etc, this is the place. You must register to post but anyone can read.

Moderators: User administrators, Moderators

Post Reply
crazymilk
Registered user
Posts: 271
Joined: 30 Jul 2008, 13:16
80-90 Mem No: 14722
Location: Suffolk

Fuel Tank/Lines Help

Post by crazymilk »

Fuel tank help

I have a very noisey fuel pump on my Ej25 conversion. I have tried 3 x pumps and all the same. These included a cheapo fleabay one, and a Bosch 044 expensive one. All very noisey.

I think I have traced the issue down to the fact I am using the original Fuel tank (1.9DG). It had the return feed on it so I thought it would be OK however I think these tanks had a smaller outlet than the Injection later tanks. I think this restriction is causing the cavition/noise on the pump.

So I am getting a bit confused, the original tank I have at the moment has a return feed but it was not injection model so therefore smaller out let.

Does this mean my only option it to fit an injection model tank and if so what size outlet does that have?
http://www.justgermancrew.com Come and join the FUN!
1985 VW T25 EJ25 SOHC Hydro Bus

User avatar
Oldiebut goodie
Registered user
Posts: 7484
Joined: 18 Apr 2008, 01:19
80-90 Mem No: 11135
Location: Eastern Angle

Re: Fuel Tank/Lines Help

Post by Oldiebut goodie »

Are you using an insulated rubber mount? On heaters it makes all the difference to noise transmitted by the chassis.
1.6D 2019 VW T-Cross
200hp VW T6
1̶Y̶ ̶1̶9̶8̶7̶ ̶H̶i̶-̶t̶o̶p̶ ̶C̶a̶r̶a̶v̶e̶l̶l̶e̶
5̶0̶8̶d̶ ̶M̶e̶r̶c̶

User avatar
Aidan
Trader
Posts: 6993
Joined: 11 Oct 2005, 19:21
80-90 Mem No: 742
Location: Llanfyllin, mid Wales : )
Contact:

Re: Fuel Tank/Lines Help

Post by Aidan »

yes you need to fit a fi tank, there are internal differences as well as the differently sized spigot outlets
the cheap pumps are noisy anyway I found, I will go to a pierberg but only seem to be available now old stock in germany

crazymilk
Registered user
Posts: 271
Joined: 30 Jul 2008, 13:16
80-90 Mem No: 14722
Location: Suffolk

Re: Fuel Tank/Lines Help

Post by crazymilk »

Thanks guy

I have found out that the injection tanks have a 12mm out let which much bigger than the no injection tanks with the return feed.

So changing the tank here I come!"
http://www.justgermancrew.com Come and join the FUN!
1985 VW T25 EJ25 SOHC Hydro Bus

User avatar
marlinowner
Registered user
Posts: 1530
Joined: 28 Jan 2014, 12:02
80-90 Mem No: 13646
Location: Scottish Borders

Re: Fuel Tank/Lines Help

Post by marlinowner »

Could also think about a remote swirl pot.
1993 SA VW T25/T3 2.5i Microbus/homebrew camper
1981/1968 Marlin Kitcar TR6 Engine

Post Reply