egizzle8

Has anyone tried this being that the rx7 injectors are saturated, instead of doing the 450's resistor box and vafc route? The turbo'd ones are a little big but the NA ones on the 2nd gens are like 460 I believe? Someone please correct me if I'm wrong?

5STAR3

you would still need the v/safc

also it is probably not worth the cost. im sure they are much more expensive, and harder to find than the DSM injectors. and a resistor box is $2.50

egizzle8

There actual pretty cheap and I wouldn't need the FI 550cc anyway. Hell the injector clips can be bought at autozone and NA 2nd gens are a dime a dozen at my local pick and pull. The DSM guys use them for cheap upgrades over the 450's. Yeah I'd have to get a vafc to tune the injectors or they'd flood my engine with something to adjust them. Just an idea?

5STAR3

sounds interesting then, i figured they would be harder to come by.

egizzle8

There's two 460's at like 4 bucks on ebay bust you'll need to find two more. They just need to be from 88 for a round saturated injector setup or the other years for a peak hold injector. Some have a oval shaped injector also.

egizzle8

Injector Information

Mazda RX-7(Gen 1 and 2) Fuel injector identification guide

Note that some injectors carry the same part number as others but plug styles and

resistances can vary. Low impedance refers to 2-3 ohms, high impedance refers to

12-13 ohms.

Year type impedance plug style plug notch position flow rating color part number

84-85 13B NT low square center 680cc orange 195500-0900
86-87 13B NT low square center 460cc red 195500-1350
86-87 13B T low square center 550cc tan 195500-1370
88 13B NT high square offset 460cc purple 195500-1350
88 13b T high square offset 550cc purple 195500-1370
89-91 13B NT high oval center 460cc red 195500-2010
89-91 13B T high oval center 550cc purple 195500-2020

As a side note, replacement fuel injector clips(for wiring harness) can be

obtained from auto parts stores to replace broken stock clips. I got the parts

from autozone:

GP Sorenson part 800-9416 Fuel Injector Connector

More about injector impedances on 2nd generations:

86 and 87 model cars used low impedance(2-3 ohm) injectors. Low impedance

injectors have a center notch on the plug. The wiring harness used with LI

injectors integrates an injector resistor pack, wired inline between the ECU and

injectors(under stock air box) to bump overall load seen at the ECU to 12-13

ohms.

88 and after models used high impedance injectors. 88 HI injectors have an offset

notch on the plug, and all post 88 injectors are HI with an oval plug(until 3rd

generation side feed injectors which are totally different). The wiring harness

on these models deleted the injector resistor pacl, carrying the 12-13 ohm load

from the injectors directly to the computer.

T-RO

Im using these on my EJ1
86-87 13B NT low square center 460cc red 195500-1350

5STAR3

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by T-RO &raquo;</TD></TR><TR><TD CLASS="quote">Im using these on my EJ1
86-87 13B NT low square center 460cc red 195500-1350</TD></TR></TABLE>

how was the fitment into the rail?