Go back to previous topic
Forum nameTurbo/Nitrous Tech
Topic subjecthahn turbosystem fuel pump(s)??
Topic URLhttps://forums.2gnt.com/dcboard.php?az=show_topic&forum=i8&topic_id=71948
71948, hahn turbosystem fuel pump(s)??
Posted by ricker625, May-31-04 04:54 PM
97 GS hahn stage II, bought it modded
was having very poor fuel delivery, than i realized i had two fuel pumps, one in tank, and one under the car. didnt know if this was the correct setup, anyone know?

i removed the pump under the car, and i have much better fuel delivery, but i still think im not getting enough, i estimate my HP at about 175 (lost a race to 190HP), im pretty sure i should be at like 225 at least with this set up.

my own analysis is that the second pump was no good, therefore inhibiting the first.

question: do i need to replace the second pump? is that the correct set-up? if i have a good pump in the tank, even if the second is part of the hahn set-up, do i still need the second?

thanks
-rick
71949, RE: hahn turbosystem fuel pump(s)??
Posted by Uberingram, May-31-04 04:56 PM
The aux pump is the correct setup. Without it you are getting no where near enough fuel.
71952, RE: hahn turbosystem fuel pump(s)??
Posted by grain, May-31-04 05:23 PM
just get a walbro 255lph and call it a day
71953, RE: hahn turbosystem fuel pump(s)??
Posted by ricker625, May-31-04 05:29 PM
get the walbro and forget about the other pump?? which is better
71954, RE: hahn turbosystem fuel pump(s)??
Posted by Uberingram, May-31-04 05:38 PM
Originally posted by ricker625
get the walbro and forget about the other pump?? which is better


http://www.2gnt.com/www/corbin/choosefpr.html
http://www.2gnt.com/www/corbin/example.html


Read.
71955, RE: hahn turbosystem fuel pump(s)??
Posted by Initial DSM, May-31-04 05:39 PM
should keep the accel inline fuel pump and get a walbro 255lph intank fuel pump too. least thats what i run.
71959, RE: hahn turbosystem fuel pump(s)??
Posted by siueclipse, May-31-04 07:18 PM
Originally posted by Initial DSM
should keep the accel inline fuel pump and get a walbro 255lph intank fuel pump too. least thats what i run.


yup yup

i run a walbro and the accell inllne.
71960, RE: hahn turbosystem fuel pump(s)??
Posted by djtrickee, May-31-04 07:21 PM
Originally posted by siueclipse
Originally posted by Initial DSM should keep the accel inline fuel pump and get a walbro 255lph intank fuel pump too. least thats what i run.
yup yup i run a walbro and the accell inllne.


WERD Bird.
71966, RE: hahn turbosystem fuel pump(s)??
Posted by EclipseTenzoR, May-31-04 08:39 PM
I'm a noob in turboing but I am learning. Does Hahn give you a fuel pump with a turbo kit? If so what kind, and are these fuel pumps noisy.. I think I may have heard something like this before somewhere but I'm checkin up with you guys.
71973, RE: hahn turbosystem fuel pump(s)??
Posted by grain, Jun-01-04 04:03 AM
hahn gives you an accel inline fuel pump. ive heard that is is noisy. my intank (walbro255) isnt quiet. i like to hear that my fuel pump is running good.
72052, RE: hahn turbosystem fuel pump(s)??
Posted by techboy, Jun-02-04 04:41 PM
Yes Hahn's aux fuel pump is noisy, but so is every other secondary fuel pump - sorry no way around that. You absolutely need it to support the fuel pressure required for boost. The only way to make it a bit quieter is to use the Walbro 255 in conjuction with it. That will help quiet it down a bit, but I agree ^^^^^ you want to be able to hear that it is working well.