ca18det leaning out with 440cc injectors

[slydn13]

hey guys. im running an s13 ca18 det, was running sweet with t3 turbo (factary rb20det) gtr fuel pump, intercooler, 2 an 1/2 exaust, stock injectors an ecu made 235 rwhp at 12psi, however wanted more and got hold of some 440cc injectors out of gti-r pulsar. i thougt the injectors are the same impedance so cant under stand why it sounds like it is now detonating, even after i droped the boost and retarded the timing. maybe some one knows where i went wrong? maybe i need resistors for the injectors?i have a chipped ecu witch will run as soon as soon as i can get hold of a z32 afm. just thought could still run as it is. was hoping to get it back down the 1/4 mile this weekend an beat my 14.4 @100mph witch i dont think will be to hard..

any help cheers

[Ca_Silvia]

Did you get the injectors cleaned and flow tested? Because i doubt very much that 20 year old injector are actually putting out what they are supposed to.

[slydn13]

yeah had them flow tested they all running even and aparntly flowing at 100%

[ca18detgabby]

you are using a chip that requires a Z32 maf and not using a Z32 maf?

that is your issue....

[mbmbmb23]

yeah had them flow tested they all running even and aparntly flowing at 100%

They are probably not 440cc injectors then. Post a pic. They're probably 259cc injectors off an sr20de pulsar motor.

[float_6969]

Yea, post up pics. You said you had the injectors tested. They they give you the results from the test?

[slydn13]

wasnt running the chiped computer, still standard one. they are yellow injectors same as r32 gtr. i thougt the 370cc injectors run at low impedance same as gtr. but i was wrong .5ohm resisters and car is now running well and loving 14 psi cheers guys. hopefully back to the track tomorrow.

[dash]

std ca18det 370s are low impedance. Why else would there be resistor box ?Aren't those yellow r34 440s a popular ca18 upgrade ?How r u seeing 14psi on std afm/ecu ?

[mbmbmb23]

std ca18det 370s are low impedance. Why else would there be resistor box ?Aren't those yellow r34 440s a popular ca18 upgrade ?How r u seeing 14psi on std afm/ecu ?

He must have been using high impedance 370's with no resistor box, then he switched to 444cc low impedance skyline injectors with no resistor...worked like crap.....so he added a .5 ohm resistor and they work like they should. That's all I can make out.