vtvette Posted August 7, 2019 Report Share Posted August 7, 2019 Hello all, After exhaustive research I am planning on a Link G4+ ECU for my 1990 Nissan 300ZX twinturbo. I have a few simple questions to start: I have a Innovative Motorsport DLG-1 dual wide band gauge and LC-2 controller already installed in my car. Through research I understand how to interface with the G4+ (yellow analog wire). Is there any reason at all to keep the factory narrow band 02 sensors with the G4+? Can I eliminate them? I will be using the G4+ built in MAP sensor. The 300ZX didn't have a factory IAT sensor until 1996. I assume I should also install an IAT sensor? Is it recommended to upgrade the factory knock sensor or, is it sufficient? If so what do you all recommend? Thank you. Quote Link to comment Share on other sites More sharing options...
Richard Hill Posted August 7, 2019 Report Share Posted August 7, 2019 Ditch the factory narrowband sensors, no need to use them. Yes, an IAT should be installed, and the factory knock sensors are usually fine. HTH, Richard. Quote Link to comment Share on other sites More sharing options...
BeallJK Posted August 9, 2019 Report Share Posted August 9, 2019 On 8/6/2019 at 8:20 PM, vtvette said: Is there any reason at all to keep the factory narrow band 02 sensors with the G4+? Can I eliminate them? Where are you located? I'm assuming you're not under any sort of emissions control for license / registration? I did something similar on my 350z/z33 where I'm using wideband o2 input, eliminated my OEM narrow bands but I stubbed off the connection with deutsch connector just incase I have to have them re-installed. +1 to the IAT. In the 350z realm its common to ditch the OEM MAF and use the on-board MAP (of your aftermarket platform) and then wire-in a standard GM IAT thermistor. Quote Link to comment Share on other sites More sharing options...
vtvette Posted August 9, 2019 Author Report Share Posted August 9, 2019 Thank you both for the excellent advice. BeallJK I am in Las Vegas, NV and registered as a classic vehicle. I carefully removed my OEM maf and o2 harnesses removing the pin's at the ECU connector so, they could be re-installed if ever needed. Recommendation on ideal placement of the GM IAT sensor? Thanks again, Quote Link to comment Share on other sites More sharing options...
Brad Burnett Posted August 9, 2019 Report Share Posted August 9, 2019 48 minutes ago, vtvette said: Recommendation on ideal placement of the GM IAT sensor? Thanks again, just before the throttle plate is best. usually in an intercooler pipe. Quote Link to comment Share on other sites More sharing options...
BeallJK Posted August 9, 2019 Report Share Posted August 9, 2019 Right on! I live in a county that doesn't smog test. What BB said - Mine is approximately 12" before the TB and 24" after the IC Quote Link to comment Share on other sites More sharing options...
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