NoPistons -Mazda Rx7 & Rx8 Rotary Forum

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-   1st Generation Specific (https://www.nopistons.com/1st-generation-specific-16/)
-   -   Carb Or Stick W/ Fi (https://www.nopistons.com/1st-generation-specific-16/carb-stick-w-fi-12986/)

rotaryrascal 02-27-2003 11:43 AM

I have FI now and one of the injecteros are leaking.....I was thinking of going to a weber side draft set up or is the down draft better or should I stick the FI?

j9fd3s 02-27-2003 12:03 PM

the efi is pretty nice on these, its very simple and works great



mike

rotaryrascal 02-27-2003 12:40 PM

ya...your right it's very easy to work w/. I just put in new o-rings and grommets on it and looks like one injector is bad (leaking) . It is moist in between the placstic top cap and the body of the injector, looks like thats were it is leaking. Know any were to get injectors for a good price?

Racer X 02-27-2003 01:13 PM

Try the parts trader.Someone is always wrecking a SE. https://www.nopistons.com/forums/pub..._DIR#>/sad.png

j9fd3s 02-27-2003 04:20 PM

i'd be thinking about greddy 720cc injectors they are $125 each



mike

rotaryrascal 02-27-2003 04:58 PM

Greddy huh!.....I'll take a look into that. Thanks..... oh were can I buy?

kennedy 02-27-2003 08:37 PM

go to greddy.com and look for a dealer. I just put 720cc injectors in my 85 se

Racer X 02-27-2003 11:46 PM


Originally Posted by kennedy' date='Feb 27 2003, 06:37 PM
go to greddy.com and look for a dealer. I just put 720cc injectors in my 85 se

Hows the idle?I know they arent that much bigger than the stockers.

rotaryrascal 02-28-2003 09:28 AM

What CC is the stock injectors anyway, does it idle ok and does the ECU read the injectors ok? And what is the real advantange going w/ a bigger injector if your running stock.

j9fd3s 02-28-2003 10:53 AM


Originally Posted by rotaryrascal' date='Feb 28 2003, 07:28 AM
What CC is the stock injectors anyway, does it idle ok and does the ECU read the injectors ok? And what is the real advantange going w/ a bigger injector if your running stock.

the stock injectors are supposed to be 680cc low impedance, they seem to test more like 700+ though. the greddy ones are 720cc also low impedance, and basically they are about half the cost of the factory gsl-se injectors. if you're running stock, sock is fine, but i have a header on mine and it runs out of fuel at high rpms



mike

rotaryrascal 02-28-2003 11:03 AM

your running a header w/ stock injectors or the greddy? Ok, the greddy is something to consider. I will be getting a header so the new injectros should help out at he higher RPm them right?

j9fd3s 02-28-2003 11:25 AM


Originally Posted by rotaryrascal' date='Feb 28 2003, 09:03 AM
your running a header w/ stock injectors or the greddy? Ok, the greddy is something to consider. I will be getting a header so the new injectros should help out at he higher RPm them right?

i have the racing beat "street port" system, a bosch fuel pump, and the stock injectors. it needs more fuel at high rpms



mike

treceb 02-28-2003 01:05 PM

well, the stock FI as has already been mentiones is pretty good. if you live oin a cold climate and your car is your daily id try to stay with the FI. but if what you want is to get the most out of the stock engine, then a carb is the way to go. iwhen i rebuild my engine i got rid of the FI. now i want to get another SE, cause theyre so nice in "stock" form...

Racer X 03-02-2003 12:56 AM


Originally Posted by j9fd3s' date='Feb 28 2003, 08:53 AM
the stock injectors are supposed to be 680cc low impedance, they seem to test more like 700+ though. the greddy ones are 720cc also low impedance, and basically they are about half the cost of the factory gsl-se injectors. if you're running stock, sock is fine, but i have a header on mine and it runs out of fuel at high rpms



mike

I was reading off a tech website the other day that the -SE injectors are a good upgrade for the early 87 T2 Low impedance fuel injection.Are they any bigger then the stock secondaries?

j9fd3s 03-02-2003 12:03 PM


Originally Posted by Racer X' date='Mar 1 2003, 10:56 PM
[quote name='j9fd3s' date='Feb 28 2003, 08:53 AM'] the stock injectors are supposed to be 680cc low impedance, they seem to test more like 700+ though. the greddy ones are 720cc also low impedance, and basically they are about half the cost of the factory gsl-se injectors. if you're running stock, sock is fine, but i have a header on mine and it runs out of fuel at high rpms



mike

I was reading off a tech website the other day that the -SE injectors are a good upgrade for the early 87 T2 Low impedance fuel injection.Are they any bigger then the stock secondaries? [/quote]

the stock turbo 2 has 4x 550cc injectors



mike

Racer X 03-02-2003 11:15 PM


Originally Posted by j9fd3s' date='Mar 2 2003, 10:03 AM
[quote name='Racer X' date='Mar 1 2003, 10:56 PM'] [quote name='j9fd3s' date='Feb 28 2003, 08:53 AM'] the stock injectors are supposed to be 680cc low impedance, they seem to test more like 700+ though. the greddy ones are 720cc also low impedance, and basically they are about half the cost of the factory gsl-se injectors. if you're running stock, sock is fine, but i have a header on mine and it runs out of fuel at high rpms



mike

I was reading off a tech website the other day that the -SE injectors are a good upgrade for the early 87 T2 Low impedance fuel injection.Are they any bigger then the stock secondaries? [/quote]

the stock turbo 2 has 4x 550cc injectors



mike [/quote]

So then on a early 87 T2 the SE injectors would be a good upgrade.Cool.I have a pait off my SE injection.If mine is a Early 87 and not a 88 then I might drop those in. https://www.nopistons.com/forums/pub...IR#>/bigok.gif

j9fd3s 03-02-2003 11:59 PM


Originally Posted by Racer X' date='Mar 2 2003, 09:15 PM
[quote name='j9fd3s' date='Mar 2 2003, 10:03 AM'] [quote name='Racer X' date='Mar 1 2003, 10:56 PM'] [quote name='j9fd3s' date='Feb 28 2003, 08:53 AM'] the stock injectors are supposed to be 680cc low impedance, they seem to test more like 700+ though. the greddy ones are 720cc also low impedance, and basically they are about half the cost of the factory gsl-se injectors. if you're running stock, sock is fine, but i have a header on mine and it runs out of fuel at high rpms



mike

I was reading off a tech website the other day that the -SE injectors are a good upgrade for the early 87 T2 Low impedance fuel injection.Are they any bigger then the stock secondaries? [/quote]

the stock turbo 2 has 4x 550cc injectors



mike [/quote]

So then on a early 87 T2 the SE injectors would be a good upgrade.Cool.I have a pait off my SE injection.If mine is a Early 87 and not a 88 then I might drop those in. https://www.nopistons.com/forums/pub...IR#>/bigok.gif [/quote]

yup, thats a good deal



mike

Racer X 03-03-2003 12:01 AM

If it is.That resistor I have is a oval one and it sits by the coil on the FC bay by the main relay.IS that the one your talking about?The other one is the fuel pump resistor.

rotaryrascal 03-03-2003 08:39 AM

he's right, mazdatrix states that the the 84-85 injector are a good upgrade. here pasted the info.





Note: For higher fuel flow in an 86-87 1/2 Turbo or Non-Turbo, the 84-85 injectors may be substituted in either the primary or secondary position (Not recommended in primary). The cutoff for 87 1/2 is June 1987 and splits at VIN #7601. The SE injectors will NOT work in engines after this VIN numbers


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