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will the 720cc injectors of the older FC fit my primary fuel rail???

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Old 11-24-06, 12:04 PM
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will the 720cc injectors of the older FC fit my primary fuel rail???

guys ißm looking for a pair of 720cc primaries for my '91 S5 TII! will the ones off the older RX-7's (think they are '84) fit my primary fuel rail??

heeeelp!
Old 11-24-06, 12:09 PM
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Those would be 680's and the impedance is wrong. But they will fit.
Old 11-24-06, 12:11 PM
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http://cgi.ebay.com/ebaymotors/720cc...spagenameZWDVW

+ a pair of 10W 10 OHM resistors from radio shack
Old 11-24-06, 12:13 PM
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but the guy selling them says a pair of 720cc injectors! aren't they off the old n/a's?
... or is he wrong?
Old 11-24-06, 12:15 PM
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lol why would an n/a have biger injectors than a turbo car... think about that one...
Old 11-24-06, 12:15 PM
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nope
Old 11-24-06, 12:21 PM
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Originally Posted by junito1
lol why would an n/a have biger injectors than a turbo car... think about that one...
maybe 'cause he only has two injectors (like 13b FB's) compared to the four of the turbo... think about that!
Old 11-24-06, 12:23 PM
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maybe 'cause he only has two injectors (like 13b FB's) compared to the four of the turbo... think about that!
WHAT!?
Old 11-24-06, 12:27 PM
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Originally Posted by jm85rx7
http://cgi.ebay.com/ebaymotors/720cc...spagenameZWDVW

+ a pair of 10W 10 OHM resistors from radio shack
that's them ...


ok so if the guys right, from what model 7 are they of?? weird...
Old 11-24-06, 12:29 PM
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those on the ebay auction are not from a 7 they are aftermarket injectors that can be used on a 7
Old 11-24-06, 12:33 PM
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Originally Posted by jm85rx7
those on the ebay auction are not from a 7 they are aftermarket injectors that can be used on a 7
they look as if they have been on a 7 for 20years though...
Old 11-24-06, 12:34 PM
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I have the same ones on my car and they look the same as those and they work fine just have them cleaned before you put them on.
Old 11-24-06, 12:39 PM
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cool! do you know what make they could be? hope not venom... :/
Old 11-24-06, 12:41 PM
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Greddy/ denzo its been a while since i had them its one of them but there not Venom
Old 11-24-06, 12:45 PM
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sounds good! i'll try to get them... thanks man!
hope the connector plug is the same...
think the had different ones s4 through s5!
Old 11-24-06, 12:45 PM
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If you have an S5 and you get those injectors you will need resistors to go along with them because they are Low Imp and the S5 has High Imp injectors
Old 11-24-06, 12:46 PM
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got that, thanks
Old 11-24-06, 12:46 PM
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I have my eyes on those too
Old 11-24-06, 12:52 PM
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thoes are greddy/denso, low impedance injectors. they will fit your fuel rail with no modification but you might need thoes resistors. are you sure you're talking about the primary injectors? what size secondaries are you running?
Old 11-24-06, 02:55 PM
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whats wrong with the vemons? I bought 4x1000cc made by venom. I have not installed them yet but, it looks like those venom ones are upgraded denso's. Cause the ones i have say denso liek the stockers. look like the stockers...
Old 11-24-06, 05:08 PM
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Originally Posted by 87 t-66
thoes are greddy/denso, low impedance injectors. they will fit your fuel rail with no modification but you might need thoes resistors. are you sure you're talking about the primary injectors? what size secondaries are you running?

yes looking for the slightly bigger primaries, 'cause my hybrid (bnr II) is going to boost before 3500rpm, and i don't want it to go lean! i'm going for 1000cc secondaries!
Old 11-24-06, 05:10 PM
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Originally Posted by junito1
whats wrong with the vemons? I bought 4x1000cc made by venom. I have not installed them yet but, it looks like those venom ones are upgraded denso's. Cause the ones i have say denso liek the stockers. look like the stockers...
just haven't heard enough good reviews about them, some say they are crap, others say they did well...

besides, the look of an injector doesn't tell you that it works properly, right!
Old 11-24-06, 05:12 PM
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If you want slightly bigger primaries you can also use the 680cc injectors from the GSLSE Fb
Old 11-24-06, 07:14 PM
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Originally Posted by junito1
whats wrong with the vemons? I bought 4x1000cc made by venom. I have not installed them yet but, it looks like those venom ones are upgraded denso's. Cause the ones i have say denso liek the stockers. look like the stockers...
thats because they are the stockers! just more flow
Old 11-24-06, 10:42 PM
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The 12aT motor used two 720cc injectors FYI.


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