Sunday, May 10, 2009 - 08:01 pm, by: Scott Wilkes(Scottywilkes)
if they are the USDM 2JZ injectors they will need a resistor pack to make them work as they are low impedence whereas the 1JZ runs high impedence injectors
Steven Nanevski Goo Roo New South Wales BF Ford Falcon XR8 MKII
Tuesday, May 12, 2009 - 11:05 am, by: Mike Ryan(Omniman69)
I have a set of 550cc sitting in a plastic bag out of a USDM MKiv supra on my table. Need to figure out the part# for the resistor pack so Toyota here can figure out wtf it is that i need.
Thursday, May 21, 2009 - 04:47 pm, by: Costa Tsimiklis(Driftshop)
550cc low imp injectors, USDM supra - 290rwkw at 80% duty cycle at peak torque.
At 95% duty, i could probably make 320rwkw.
Im upgrading to Sard 800cc injectors (just need to install them now) and re-mapping for 450+rwkw on the 1J.
Low imp injectors give the benefit of less lag time to open (even when used with a resistor block) for a more accurate injection. THe lag time is the mechanical lag associated with the solenoid opening. Low imp are generally 0.75ms and high imp are generally 1.65ms
440cc JDM supra injectors - good for around 250rwkw.
Friday, May 22, 2009 - 03:32 pm, by: Cihan Aday(Cihan)
440s will do 28-290rwkw at 90% dc which is what Toyota drives them to with the factory ECU. I have done and seen this countless times with well done setups, making efficient power (ie. low BSFC). Assuming peak power AFR's are 12.5:1
A VVTI 2JZ with oem 440's and fuel pump will do 270rwkw at 17psi on stock turbo's, with a little fuel to spare.
*Multiple* people on these forums are running high 11's, low 12's and or 250rwkw+ with stock 380's and a pump upgrade.
I've personally pushed standard 380's to just under 300rwkw with T3G's. AFR's were leaning out towards 13.5:1 but it illustrates a point.
I know Motec has their own HP vs CC formula, but its a blanket calculation based on an unlikely BSFC of 0.5 and 20% leeway AFAIK.
Stock 380's need practically no lag compensation (0.1-0.2ms) at 14.4v with the alternator running and they are high impedance. They're high impedance so Toyota could run them in batch fire reliably without overloading the injector drivers, like most other OEM batch injection implementations.
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