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Part # for AT Secondary Fuel Injectors ?

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Old Feb 16, 2005 | 11:36 AM
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Part # for AT Secondary Fuel Injectors ?

I'm thinking about getting the secondary fuel injectors off of an AT RX8, (given the fact that they are 500 cc's) for my car (6 sp., but secondaries are a bit smaller at 400 cc's). Just wondering if anybody has a part # for them. Kind've difficult to talk to Mazda dealerships without part #'s. Want to look at increasing boost but this is one of the first steps. I want to increase fuel delivery.
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Old Feb 16, 2005 | 06:59 PM
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JeRKy 8 Owner's Avatar
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Why do the automatic Rx8s have largersecondary fuel injectors anyway?
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Old Feb 16, 2005 | 07:28 PM
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just tell them what type of injector and see if they have the 780's in stock. probably 1/4 the cost of mazda OE too.
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Old Feb 16, 2005 | 08:59 PM
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Originally Posted by JeRKy 8 Owner
Why do the automatic Rx8s have largersecondary fuel injectors anyway?
Four ports maybe...
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Old Feb 16, 2005 | 09:52 PM
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Yep, because they only have 4 on the AT model vs. 6 on the 6 sp.
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Old Feb 17, 2005 | 04:25 PM
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JeRKy 8 Owner's Avatar
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The guy who has installed GReddys kit on his automatic Rx8 was saying he needs to upgrade HIS injectors to 550cc

Originally Posted by apex8
. Jumpers 5 and 6 inside the emanage were turned off. I am using just the additional injector map to control the 4 injectors. My initial tuning has the air/fuel ratio in the 11 range. I would like to gradually lean it out to about 11.5. The only problem is that the injectors are running at about 95%+ duty cycle. This is too high, so I am going to replace the secondary injectors with 550 cc ones from RC Engineering.

Last edited by JeRKy 8 Owner; Feb 17, 2005 at 04:32 PM.
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