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| Forum name | Turbo/Nitrous Tech |
| Topic subject | turbo kit with stock GST pump |
| Topic URL | https://forums.2gnt.com/dcboard.php?az=show_topic&forum=i8&topic_id=53588 |
53588, turbo kit with stock GST pump
Posted by 420aturbo, Aug-07-03 10:37 AM
I have a NER stage 1 kit, Vortech 12-1 FMU, and stock injectors. Can I boost 5 psi safely with a stock GST intank pump only?
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53592, RE: turbo kit with stock GST pump
Posted by neovb, Aug-07-03 12:09 PM
I think the GST pump only flows 190lph, I dont think thats enough for our cars.
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53593, RE: turbo kit with stock GST pump
Posted by admin2, Aug-07-03 12:31 PM
This is a BAD IDEA. Why do you think they upgrade their pumps? because they don't flow well at higher pressures. for 5psi on stock injectors, you're running nearly 100psi of fuel pressure. A GST pump can't do that; you might as well leave your stocker in and go ahead and ruin your motor.
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53595, RE: turbo kit with stock GST pump
Posted by turbo8u, Aug-07-03 01:04 PM
100 psi on 5 pounds? whoa there, i dunno about that
can we say richy rich?
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53596, RE: turbo kit with stock GST pump
Posted by Uberingram, Aug-07-03 01:15 PM
with that fmu setup
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53599, RE: turbo kit with stock GST pump
Posted by 420aturbo, Aug-07-03 02:33 PM
Are you sure about the 100 psi at just 5 psi of boost? Elaborate on this. Can I use a Walbro 255 LPH (not hi-psi) pump?
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53602, RE: turbo kit with stock GST pump
Posted by DarkOne, Aug-07-03 02:50 PM
Base fuel pressure of around 40psi, 12:1 riser. 40 + 12 + 12 + 12 + 12 + 12 = 100psi.
Even the 225LPH Walbros can be a bit small at those fuel pressures. That is why HRC supplies a big inline pump...
And yes, when i was stock motor and stock injector, i'd see over 100psi of fuel pressure at 5-6psi of boost. My gauge only went to 100psi, but the needle would move beyond that when i stepped up to 8-9psi and a big inline to augment my Walbro.
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