LEEXR6T Donating Members 91 Member For: 19y 9m 28d Gender: Male Posted 03/05/08 11:14 PM Share Posted 03/05/08 11:14 PM Put me down for one please! Another item to help reach 300+RWKW Link to comment Share on other sites More sharing options...
Adam Here since the start... Lifetime Members 10,282 Member For: 21y 9m 16d Gender: Male Location: Victoria Posted 04/05/08 12:41 AM Share Posted 04/05/08 12:41 AM [quote name='ENVY-T' post='669825' date='May 3 2008, 10:12 PM']Nup. No retune required.[/quote] I disagree... If the pump has a higher pressure then you'll find that the car will run richer. Link to comment Share on other sites More sharing options...
Dirty32 Legendary member!! Donating Members 1,739 Member For: 18y 20d Gender: Male Location: Dianella, West Oz Posted 04/05/08 02:59 AM Share Posted 04/05/08 02:59 AM I knew you would come through Steph... Add my name to the list please mate! Thanks Champ Link to comment Share on other sites More sharing options...
Jeremy Member 112 Member For: 16y 9m 29d Gender: Male Location: Perth mindaz Posted 04/05/08 05:48 AM Share Posted 04/05/08 05:48 AM [quote name='TORN8O' post='670033' date='May 4 2008, 07:03 AM']The group buy will close on the 17th April ......... its now MAY!![/quote] yes.. its now may??? did u mean 17th may? :):):) Link to comment Share on other sites More sharing options...
adamw Member 143 Member For: 20y 6m 27d Location: Darwin Posted 04/05/08 06:05 AM Share Posted 04/05/08 06:05 AM [quote name='Adam' post='670065' date='May 4 2008, 10:41 AM']I disagree... If the pump has a higher pressure then you'll find that the car will run richer.[/quote] richer I can deal with as long as its not like going from standard injectors to 60lb injectors :) Link to comment Share on other sites More sharing options...
straughsberry Donating Members 1,846 Member For: 17y 5m 24d Gender: Male Location: Broady, Melbourne Posted 04/05/08 06:16 AM Author Share Posted 04/05/08 06:16 AM No worries fellas. And yes, 17th of May! And a retune for fuel pump? I wouldn't have thought so. Maybe injector scalling but that's hardly a retune. Link to comment Share on other sites More sharing options...
senna_T Forged Member Lifetime Members 15,818 Member For: 18y 4d Gender: Male Location: SW Sydney Posted 04/05/08 06:17 AM Share Posted 04/05/08 06:17 AM if the injectors are still scaled the same they are only gonna squirt that much fuel whether the pressure is up or not, the new pump doesn't do away with the fuel reg. or anything like that Link to comment Share on other sites More sharing options...
Adam Here since the start... Lifetime Members 10,282 Member For: 21y 9m 16d Gender: Male Location: Victoria Posted 04/05/08 07:11 AM Share Posted 04/05/08 07:11 AM The injectors don't measure the amount of fuel. They are open for aslong as they are told to be. More fuel will be injected at a higher pressure over the same period of time compared to a lower pressure. Pat, your comment on the reg proves my point... It raises fuel pressure as boost pressure rises to allow more fuel to be injected in the short time available due to increasing RPM. When i fitted a Walbro pump to my old ute the AFR's went from 12's to 10's. A retune to me is any change to the tune. It wouldn't need a [i]complete[/i] retune. But will require adjusting. That's how i understand it anyway. Link to comment Share on other sites More sharing options...
ENVY-T CNUTOX Donating Members 3,098 Member For: 22y 1m 5d Gender: Male Location: Not sure? Posted 04/05/08 07:34 AM Share Posted 04/05/08 07:34 AM Firstly you had 968's not stockies, right? As I have experienced in the past 2 days, when the pump is not up to the task, it affects the way the injectors need to be scaled. My current BOOGER pump is not up to it, and the dekas are scaled much richer than any other deka car that hedcase has tuned. If I change my pump, I will flood the poor bastard, as you would have experienced with a faulty stock pump and 968's. The fuel pump supplies at a given rate, the pressure is controlled by the fuel reg, right? Note that also when running STOCK injectors they are scaled properly from factory, now given that the stock injectors still have some flow left in them but the fuel pump is not up to the task the car will obviously run leaner than the mixtures you are commanding with edit. Thus by returning the fuel pressure back to what the regulator will let it be and having a little headroom left in the injector flow by replacing a pump that can keep the pressure that the fuel reg wants it to the mixtures should read out what you have commanded, providing the injector scaling is not touched. Althouh it would be advisable that you at least get the mixtures checked with a wide open lambda meter just for saftety's sake. Link to comment Share on other sites More sharing options...
zx6rblue 100,000Ks and still going strong. Donating Members 381 Member For: 17y 8m 28d Gender: Male Location: Launceston Tas Posted 04/05/08 10:28 AM Share Posted 04/05/08 10:28 AM rub out the pencil and use a pen. will on the 16th maybe before see how the wallet looks after my trip t Melbourne. Link to comment Share on other sites More sharing options...
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