hodge Posted January 11, 2010 Share Posted January 11, 2010 I've been reading into this 12v fuel pump mod. Is this totally nessessary for the fueling for a big single with a standalone ECU. I would have thought Ryan would just sort the right fuel at the right time. All opinions are welcome please guys n girls. Thanks John Link to comment Share on other sites More sharing options...
mhooper2 Posted January 11, 2010 Share Posted January 11, 2010 I've been reading into this 12v fuel pump mod. Is this totally nessessary for the fueling for a big single with a standalone ECU. I would have thought Ryan would just sort the right fuel at the right time. All opinions are welcome please guys n girls. Thanks John Do NOT do the 12v mod. It isnt worth it. Use a 12V relay made by bosch. The 12V mod will burn out your pump (s) faster and there is no gain. Safety: It is not safe to do the 12V mod. Link to comment Share on other sites More sharing options...
mhooper2 Posted January 11, 2010 Share Posted January 11, 2010 I have triple walboros with 2 gauge wire ran from the battery to the rear. Here is the correct way to wire your pumps up. Link to comment Share on other sites More sharing options...
hodge Posted January 12, 2010 Author Share Posted January 12, 2010 Im using a Single Bosch 044 pump. Do you have a wiring diagram for this relay you mentioned and a part number for the relay. Link to comment Share on other sites More sharing options...
mhooper2 Posted January 12, 2010 Share Posted January 12, 2010 I will get the drawing posted up. Is yours in tank or out of tank? You actually utilize some of the stock fuel pump wiring. You might be able to see in the pic I posted where you tap into it for the signal then run your power to the relays. Then from the relay to the pump Link to comment Share on other sites More sharing options...
dude Posted January 12, 2010 Share Posted January 12, 2010 Do NOT do the 12v mod. It isnt worth it. Use a 12V relay made by bosch. The 12V mod will burn out your pump (s) faster and there is no gain. Safety: It is not safe to do the 12V mod. It is only not safe if you have a constant 12v feed to the pump on ignition. If it is done correctly there is no problem, and walboro pumps are designed to run at 12v. As said do NOT just join the 2 large wires together though. Link to comment Share on other sites More sharing options...
hodge Posted January 12, 2010 Author Share Posted January 12, 2010 Is it nessessary to have the pump on a constant 12v instead of 7v off boost. Link to comment Share on other sites More sharing options...
Matt Harwood Posted January 12, 2010 Share Posted January 12, 2010 Is it nessessary to have the pump on a constant 12v instead of 7v off boost. Simple answer, no. Link to comment Share on other sites More sharing options...
dude Posted January 12, 2010 Share Posted January 12, 2010 Simple answer, no. More complex answer, if the switching is working then no, if not then after you rebuild your engine yes!!! Talking extremes here at high boost. Link to comment Share on other sites More sharing options...
hodge Posted January 12, 2010 Author Share Posted January 12, 2010 I don't think I'm gona bother to be honest. I just thought I'd clear it up. Thanks for the input guys it's much appreciated, thanks. Link to comment Share on other sites More sharing options...
Matt Harwood Posted January 12, 2010 Share Posted January 12, 2010 I never took you as a complex person mate If you have an AFR gauge in the car you'd see the AFR's lean off if there were a problem. In the same way as if the pump itself were dying. I've never seen the switching fail to 7v. Fail completely, but never to 7v... Link to comment Share on other sites More sharing options...
Wez Posted January 12, 2010 Share Posted January 12, 2010 Which standalone are you using? My understanding is that if you are running a standalone ECU it wont be switching the pump up and down anyway. The standalone unit would have to include a strategy to be able to do it and then be configured. As already mentioned the 12V mod has for a long time been considered dangerous as it bypasses the intelligence in the system and just sends a constant 12V with ignition on, its handy for testing pump issues but thats all Link to comment Share on other sites More sharing options...
hodge Posted January 12, 2010 Author Share Posted January 12, 2010 I'm going to be running a solaris wez. Link to comment Share on other sites More sharing options...
Wez Posted January 12, 2010 Share Posted January 12, 2010 I'm going to be running a solaris wez. Good choice and dont worry about doing any 12v mods Link to comment Share on other sites More sharing options...
caracol Posted January 14, 2010 Share Posted January 14, 2010 i see in this post that if i run a standalone ecu i dont need to make the 12v mod because is possible that the ecu do this, but i have another question some ppl do the boost cut controller mod with a standalone do i need to do it?? Link to comment Share on other sites More sharing options...
hodge Posted January 14, 2010 Author Share Posted January 14, 2010 Nope you don't news a boost cut with a standalone. Link to comment Share on other sites More sharing options...
caracol Posted January 14, 2010 Share Posted January 14, 2010 ty hodge for the info Link to comment Share on other sites More sharing options...
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