Injectors!
11-12-15, 10:33 AM
#2
What ECU are you running? I recall posting on a previous post by you and you said you would be going RTEK. If you go RTEK the absolute smallest injector you can run is 550cc, so these would not work. Plus I have never heard of this brand. If you want some good injectors that aren't a lot, then check out RC Engineering. They have injectors on Ebay for roundabouts $90, if I recall correctly.
11-12-15, 11:18 AM
#4
You have a stock ecu right? And I forgot that you're car is turbo. 500cc is too small for that, even if it's just for the primaries it could cause troubles. Pick up 720cc injectors all around if going rtek. They won't cost you anymore than 550cc ones will and they will give you some room for growth.
11-12-15, 12:59 PM
#5
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You have a stock ecu right? And I forgot that you're car is turbo. 500cc is too small for that, even if it's just for the primaries it could cause troubles. Pick up 720cc injectors all around if going rtek. They won't cost you anymore than 550cc ones will and they will give you some room for growth.
11-13-15, 04:44 AM
#7
Turns out the RC injectors only come in 750cc, not 720, which isn't a huge deal. I was way off on my price. They're about $180 instead of the $90 that I said they were. I guess I got a stupid deal on them. Anyways, it's best to go with a reputable brand of injectors instead of the cheapest ones you can find. There's a reason why those other injectors are so cheap and it's probably best if you don't find out why firsthand.
You're also going to need some 550cc injectors for the primaries, unless you want to go with the RC 750cc injectors for primary and secondary. Which is a good option since that will give you the most room for improvement.
It's against forum rules for me to link the ebay post, but this is the exact title for it. "RC 750cc Fuel Injectors Mazda RX7 FC3S 13B 20B NEW Pair"
You're also going to need some 550cc injectors for the primaries, unless you want to go with the RC 750cc injectors for primary and secondary. Which is a good option since that will give you the most room for improvement.
It's against forum rules for me to link the ebay post, but this is the exact title for it. "RC 750cc Fuel Injectors Mazda RX7 FC3S 13B 20B NEW Pair"
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11-13-15, 06:51 AM
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Turns out the RC injectors only come in 750cc, not 720, which isn't a huge deal. I was way off on my price. They're about $180 instead of the $90 that I said they were. I guess I got a stupid deal on them. Anyways, it's best to go with a reputable brand of injectors instead of the cheapest ones you can find. There's a reason why those other injectors are so cheap and it's probably best if you don't find out why firsthand.
You're also going to need some 550cc injectors for the primaries, unless you want to go with the RC 750cc injectors for primary and secondary. Which is a good option since that will give you the most room for improvement.
It's against forum rules for me to link the ebay post, but this is the exact title for it. "RC 750cc Fuel Injectors Mazda RX7 FC3S 13B 20B NEW Pair"
You're also going to need some 550cc injectors for the primaries, unless you want to go with the RC 750cc injectors for primary and secondary. Which is a good option since that will give you the most room for improvement.
It's against forum rules for me to link the ebay post, but this is the exact title for it. "RC 750cc Fuel Injectors Mazda RX7 FC3S 13B 20B NEW Pair"
11-13-15, 10:21 AM
#10
Looking down on the engine, with the upper intake manifold off, the long fuel rail is for the secondaries and the short fuel rail is for the primaries. You can also see the secondary fuel rail fairly easily with the UIM still on, since it sits higher up than the primary fuel rail.
11-13-15, 10:24 AM
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Looking down on the engine, with the upper intake manifold off, the long fuel rail is for the secondaries and the short fuel rail is for the primaries. You can also see the secondary fuel rail fairly easily with the UIM still on, since it sits higher up than the primary fuel rail.
11-13-15, 11:56 PM
#12
Your engine has 4 injectors, 2 being the primaries and 2 being the secondaries. So if you want to upgrade the injectors to a suitable size, which I would recommend, then yes, you would need to order 4 injectors. Some people run 550cc injectors as the primaries and 720cc or 750cc as the secondaries, or 720cc or 750cc all around.