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Location:
Brisbane
Registered:
May 2002
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Re: 1G electrical bits
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Mon, 26 September 2005 03:23
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| hickoz_bro wrote on Mon, 26 September 2005 09:41 |
just booked my car in to get the wiring done, the fella there reckons that the fuel pump controller relay does more then just stop a little noise at idle, it keeps the fuel pump on a "low" setting right up until boost, at which point it lets the fuel pump go to "high". because as he said it's easier to control smaller injectors then it is to control larger injectors, the way i understood it, on the low setting you'll get better efficiency (albeit a minor difference) 'cause there'll be less fuel passing throught the injector rail and so the injectors won't be doing so much work or something to that effect... anyways the point is... that teeny tiny bit of extra noise you get at idle is infact there always, just that it is drowned out by the engine. where as with the relay, the pump is doing less work right up until boost.
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Sounds like a giant load of BS to me 
The fuel rail has a fuel pressure regulator on it (~40psi if i recall, yes it is rising rate tho), running the fuel pump at battery voltage the whole time will just cause extra fuel to be sent back to the tank via the return. If you run the pump at +7v or +13v (as long as the pump is flowing enough at those voltages) you should get a constant pressure in the fuel rail (that is the point of the regulator).
Sure the pump might be running a little faster, but 99.9% of cars run with the fuel pump at a constant (battery) voltage at any rate, so I think working the pump to hard is a null and void argument. The reason Toyota do it is because xA70's were sports 'cruisers' with a bit of an emphasis on luxury...
In the end it is your car, feel free to do what you desire
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| | Subject | Poster | Date |
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1G electrical bits
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hickoz_bro | Wed, 21 September 2005 00:22 |
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Re: 1G electrical bits
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CrUZsida | Wed, 21 September 2005 01:00 |
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Re: 1G electrical bits
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hickoz_bro | Wed, 21 September 2005 01:51 |
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Re: 1G electrical bits
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EvilJack | Wed, 21 September 2005 02:04 |
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Re: 1G electrical bits
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CrUZsida | Wed, 21 September 2005 02:15 |
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Re: 1G electrical bits
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hickoz_bro | Wed, 21 September 2005 02:29 |
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Re: 1G electrical bits
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CrUZsida | Wed, 21 September 2005 02:34 |
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Re: 1G electrical bits
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brett_celicacoupe | Wed, 21 September 2005 11:34 |
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Re: 1G electrical bits
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wilbo666 | Wed, 21 September 2005 12:16 |
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Re: 1G electrical bits
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hickoz_bro | Wed, 21 September 2005 15:16 |
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Re: 1G electrical bits
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wilbo666 | Thu, 22 September 2005 02:38 |
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Re: 1G electrical bits
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hickoz_bro | Thu, 22 September 2005 02:53 |
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Re: 1G electrical bits
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Sir_2JZA70 | Thu, 22 September 2005 10:48 |
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Re: 1G electrical bits
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wilbo666 | Thu, 22 September 2005 12:00 |
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Re: 1G electrical bits
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hickoz_bro | Thu, 22 September 2005 12:33 |
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Re: 1G electrical bits
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Sir_2JZA70 | Thu, 22 September 2005 13:07 |
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Re: 1G electrical bits
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hickoz_bro | Thu, 22 September 2005 13:28 |
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Re: 1G electrical bits
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brett_celicacoupe | Thu, 22 September 2005 13:59 |
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Re: 1G electrical bits
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Sir_2JZA70 | Thu, 22 September 2005 22:07 |
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Re: 1G electrical bits
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hickoz_bro | Sun, 25 September 2005 23:41 |
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Re: 1G electrical bits
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wilbo666 | Mon, 26 September 2005 03:23 |
