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Rob Charles
Tinkerer
Victoria
v8

Posts: 22
Reg: 07-2014

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 Tuesday, July 29, 2014 - 01:23 pm, by:  Rob Charles (Pearl_white) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)
Hi guys, just a few questions.

1. Why does soarer fuel pump run at 9v when cruising, and 12v when 'flat out'?
What benefit does this give?
Why not run at 12v at all times?

2. When fuel ecu is bypassed, what issues arise?
- it wont run at 9v, but what else?

3. How likely is it for a fuel pump to die in general, and will it die 'faster' after the fuel ecu is bypassed?

4. If bypassing fuel ecu lowers lifespan of fuel pump, how long do I have after bypassing fuel ecu?


Thanks for any info :-)
Allan Langford
Goo Roo
Vic
UZZ31

Posts: 1243
Reg: 05-2010

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 Tuesday, July 29, 2014 - 03:21 pm, by:  Allan Langford (Allan) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)
1/
noise is decreased and pump life increased at 9v and conversely flow capacity is increased at 12v

2/
if you crash the car and a fuel line is torn off it will continue to spray fuel all over your trapped body and hot exhaust

3/
it happens and sooner

4/
find a bit of string
Tom Richards
Goo Roo
nsw
V8

Posts: 1887
Reg: 08-2005

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 Tuesday, July 29, 2014 - 06:32 pm, by:  Tom Richards (Tomr) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)
well said allan
Boris Siljanoski
Goo Roo
Western Australia
LS400 + Soarer.

Posts: 2214
Reg: 11-2007

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 Tuesday, July 29, 2014 - 08:54 pm, by:  Boris Siljanoski (Z2tt) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)
OK so is that to say if you run it at 12v Constantly it will run too rich on cruise and low load conditions as the fuel pump is delivering a higher amount of flow?
Rob Charles
Tinkerer
Victoria
v8

Posts: 28
Reg: 07-2014

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 Tuesday, July 29, 2014 - 10:52 pm, by:  Rob Charles (Pearl_white) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)
That is basically what I too am wondering.
Tom Richards
Goo Roo
nsw
V8

Posts: 1888
Reg: 08-2005

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 Wednesday, July 30, 2014 - 05:33 am, by:  Tom Richards (Tomr) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)
it will not run too rich.

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