RB25 NEO Injector --> Precision 880's Power FC Settings.

Discuss the RB20, RB25 and RB26 series engines.
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sickness14
Posts: 667
Joined: Wed Dec 31, 2008 6:16 pm
Car: 95' S14 SE. RB25 Neo. ARP, Tomei 260's, HX40 Pro, PFC, Synapse, Greddy
Location: Raleigh, NC

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Can anyone find me the injector lag specs on the Precision engineering 880cc injectors, 042-0880 model. the website shows the opening and closing specs, but the power FC wants one number to calibrate the larger injector size and i dont know which one of the numbers to enter.

Precision Engineering injector model: 042-0880 - 880cc Low Impedance - 2 ohm

opening ms : 1.130
closing ms: .998

which of the following is the stock injector specs in the neo. im getting tired of people telling me different things. can anyone verify from an accredited source?

RB25DET NEO - 370cc - 0.7ms
RB25DET NEO - 380cc - 0.6ms
RB25DET NEO - 380cc - 0.7ms ? WTF

Old SIZE / New Size = Correction
New Latency - Old Latency = Latency Correction


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RustspecS13
Posts: 928
Joined: Sat Sep 08, 2007 5:30 pm
Car: '74 260z and '88 300zx turbo

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For the new injectors I would split the difference at 1ms. It should work out that it opens a little later then the computer thinks, and close a little later then it thinks so the actual injection amount will be what the computer/you are targeting for.

As for the stock time, I would look at your current tune, if that's possible. If not I would look at the part number on the injectors and see if you can trace it back to the injector spec sheet. Its an even smaller difference then the new injectors so really you'd probably be fine using .6-.7ms.

~Alex

User avatar
sickness14
Posts: 667
Joined: Wed Dec 31, 2008 6:16 pm
Car: 95' S14 SE. RB25 Neo. ARP, Tomei 260's, HX40 Pro, PFC, Synapse, Greddy
Location: Raleigh, NC

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that all sounds great, but i need to be sure the neo injectors are actually those numbers. i dont want to guess on this part, its gotten me into trouble everywhere else in the past.

also, what spark plug gap should i be using? Stock gap? I got the OEM spark plugs from raw brokerage and put them in. will i have problems with heat range / or spark blow out from the gap? im not sure what boost i'll be making yet. im going to start out very small and work up.


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