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Timing Maps W/ Alky or Race Gas---Screen Shots

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Old Jun 26, 2006, 10:44 AM
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Originally Posted by thatsMR2u
great idea! thanks for just saving me some money! ohh and still the question is if i switch down to 660cc injectors will it throw my whole tune off or just lean out my top end?
Once you updated your injector scaling, a WOT pass should be able to tell you for sure. With the tools you would have, it would only take you a few runs to get it worked out.
Old Jun 26, 2006, 10:48 AM
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Originally Posted by TTP Engineering
Once you updated your injector scaling, a WOT pass should be able to tell you for sure. With the tools you would have, it would only take you a few runs to get it worked out.
nice!! yaah with zeitronix, life is easy!
Old Jun 26, 2006, 10:53 AM
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if youre going to upgrade injectors too soon upgrade whats controling them...im sure the flash systems can overhaul the ecu and set the injector loads right but how difficult is it? also how much boost are you pushing?
Old Jun 26, 2006, 10:55 AM
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Originally Posted by blackevo110
if youre going to upgrade injectors too soon upgrade whats controling them...im sure the flash systems can overhaul the ecu and set the injector loads right but how difficult is it? also how much boost are you pushing?
What are you talking about, he is downsizing injectors. He does not need any other fuel controller. Read the thread before posting.
Old Jun 26, 2006, 11:02 AM
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oh my bad...yea...ignore what i said then.
Old Jun 26, 2006, 11:06 AM
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no the coment still applies should he keep the bigger injectors.
Old Jun 26, 2006, 11:20 AM
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Originally Posted by blackevo110
no the coment still applies should he keep the bigger injectors.
no need for something bigger than 660s, especially with Meth injection at his power level.
Old Jun 26, 2006, 11:23 AM
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Originally Posted by TTP Engineering
Once you updated your injector scaling, a WOT pass should be able to tell you for sure. With the tools you would have, it would only take you a few runs to get it worked out.
I'm glad my injectors are scaled now... If I ever go bigger I don't have to start totally over like I just did
Old Jun 26, 2006, 11:27 AM
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Originally Posted by anjapower
no need for something bigger than 660s, especially with Meth injection at his power level.

i understand...i think you missed my point.
Old Jun 26, 2006, 01:36 PM
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Originally Posted by blackevo110
i understand...i think you missed my point.
i think i understand what your saying?! even if they are overkill i still should be able to tune them out right?! well when i injector scale anything above 700 my idle becomes absolutely terrible 21 air/fuel, but when i keep it around 630 my idle is great i just need to lean out the table alot, so im thinkign when i put in 660's i shouldnt have that much to do other than a lil richening up!
Old Jun 26, 2006, 01:44 PM
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Originally Posted by thatsMR2u
i think i understand what your saying?! even if they are overkill i still should be able to tune them out right?! well when i injector scale anything above 700 my idle becomes absolutely terrible 21 air/fuel, but when i keep it around 630 my idle is great i just need to lean out the table alot, so im thinkign when i put in 660's i shouldnt have that much to do other than a lil richening up!
Yeah, just as the 560cc stock injectors are scales back to 513 based on factors including USA 93 octane, you use a percentage of the actual true flow of the injectors. Keep in mind there are many that are rated for the same cc, but when flow tested, some do not live up to the claimed ratings.

Best bet is to scale them while monitoring STFT and if you get them in a 0-5% range at idle and cruise, that will be a great starting point to tune WOT.
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