Nismo280zEd Posted June 23, 2003 Share Posted June 23, 2003 Back in january or December i remember readn on a guys site that he was making a Mass Air Flow sensor for the EFI z's and was in trial of prototypes. Anybody heard anything about this as i can't seem to find the website again. Thanx Quote Link to comment Share on other sites More sharing options...
frank280zx Posted June 23, 2003 Share Posted June 23, 2003 I know pallnet was tweaking on this and (test) runnin It he is situated in the AL area, he is the guy that always seems to have every part you need ( Ã think i have one of those!) hope this helps ( he is posting on zcar.com pretty often) Quote Link to comment Share on other sites More sharing options...
zcarnut Posted June 23, 2003 Share Posted June 23, 2003 Anyone care to comment on this site/product? http://www.pro-flow.com/Import/import%20front.htm Quote Link to comment Share on other sites More sharing options...
SleeperZ Posted June 23, 2003 Share Posted June 23, 2003 Anyone care to comment on this site/product? http://www.pro-flow.com/Import/import%20front.htm Looks great, but I didn't see a price (means $$$.) If it costs more than half the price of a stand-alone, I'd consider the standalone, as the factory electronics are not conductive to tuning and large hp increases. Quote Link to comment Share on other sites More sharing options...
Lockjaw Posted June 23, 2003 Share Posted June 23, 2003 You also will run into the same issue JWT has with the Cobra meter. The ecu can only supply the hot wire 5.15 volts, and once you get beyond that, you are stuck, unless you can hack the ecu and add a .5 volt step like JWT does. Quote Link to comment Share on other sites More sharing options...
jeffp Posted June 25, 2003 Share Posted June 25, 2003 You are correct that the ECU does need modifications to get the higher Hp out of it. But, HACKING, I dont think so. That modification simply requires a resistor change to move the trip point of a differential amplifier in the ECU. The stock MAF requires a 2.2 vlot signal to the diff amp to operate. When the Ford MAF is used those parameters are changed so that the circuit will operate correctly. Then to get a higher voltage for metering 5.59 volts the resistors are again changed to get the additional metering. This is not HACKING, it is modifying the circuit to accomidate a different set of operating parameters. In electroniccs this is frequently done for various reasons, and it is all based on theory, not seat of the pants modifications, big difference there. So anyway, HACKING sounds so amature and little knowledge based I just could not let this one go JWT does not hack the ECU, they simply modify thr exsisting circuits to acheive more of the same operations. Quote Link to comment Share on other sites More sharing options...
jmead Posted September 23, 2003 Share Posted September 23, 2003 any update? I'd like to hear more about this, AFM is a PITA Quote Link to comment Share on other sites More sharing options...
SleeperZ Posted September 23, 2003 Share Posted September 23, 2003 any update? I'd like to hear more about this, AFM is a PITA Depends on what you want to do. If you can handle wiring, do a factory Z31 ECU and MAF swap, I'm having tremendous luck with mine. I even am running strong and efficiently with 370cc injectors (40% larger than stock) - I just passed the CO emissions test without an adjustment. I haven't heard the latest on doing a straight MAF to AFM conversion. I know someone (pallnet?) was making a map circuit to convert it to the factory 280XT ECU... Quote Link to comment Share on other sites More sharing options...
Bernardd Posted September 24, 2003 Share Posted September 24, 2003 Depends on what you want to do. If you can handle wiring, do a factory Z31 ECU and MAF swap, I'm having tremendous luck with mine. I even am running strong and efficiently with 370cc injectors (40% larger than stock) - I just passed the CO emissions test without an adjustment. That is impressive!! I chose to reprogram the rom. Easily done, but you need to have the equipment to do it. I'm also running 370cc injectors but will be moving up 450's next summer along with a better intercooler/turbo setup. Bernard Quote Link to comment Share on other sites More sharing options...
ecp48 Posted September 24, 2003 Share Posted September 24, 2003 Whenever MAF is discussed with respect to the 280, the topic always deals with the Turbo. Why not the naturally aspirated High Performance 280Z. Any restriction on the intake side is a negative, which is why there so many MAF sizes/options for the 5.0 Ford. I would like to see something, which allows a MAF to be used with the stock Fuel Injection on a Modified 280Z NA. ecp48 Quote Link to comment Share on other sites More sharing options...
SleeperZ Posted September 24, 2003 Share Posted September 24, 2003 Again, I think the Z31 with MAF is a good choice, for turbo or n/a. Non-turbo applications are great as you use turbo injectors, and you are unlikely to max out the duty cycle on those! I had to go to larger ones on my turbo application. Quote Link to comment Share on other sites More sharing options...
ecp48 Posted September 24, 2003 Share Posted September 24, 2003 Nathan, Thanks for the response. A couple of questions. Do all Z31s use a MAF, for some reason I was thinking only the turbos had a MAF. When using the Z31 MAF and ECU, does it require the addition of an O2 Sensor on the 280 (78 280Z)? Will the Turbo Injectors provide too much fuel or will the ECU adjust for it? I know my conversion, F54 Short block with shaved P90 head (.080) (pocket ported), Cam and Headers will be on the lean side, but would the turbo injectors be overkill? Has anyone done a schematic or "how to" on this conversion? Your help is much appreciated. Ed Palmer Quote Link to comment Share on other sites More sharing options...
kalium99 Posted December 27, 2003 Share Posted December 27, 2003 Sounds interesting. For the NA, what year Z31 does the ECU have to come from, or does it not matter? Other than the MAF and ECU, what other parts are needed from the Z31 if its to work on a 280zx engine? Quote Link to comment Share on other sites More sharing options...
SleeperZ Posted December 27, 2003 Share Posted December 27, 2003 Nathan' date=' Thanks for the response. A couple of questions. Do all Z31s use a MAF, for some reason I was thinking only the turbos had a MAF. When using the Z31 MAF and ECU, does it require the addition of an O2 Sensor on the 280 (78 280Z)? Will the Turbo Injectors provide too much fuel or will the ECU adjust for it? I know my conversion, F54 Short block with shaved P90 head (.080) (pocket ported), Cam and Headers will be on the lean side, but would the turbo injectors be overkill? Has anyone done a schematic or "how to" on this conversion? Your help is much appreciated. Ed Palmer[/quote'] Wow, I sure missed responding to this one All Z31s use a MAF; as a matter of fact, all Z31 MAFs are the same, turbo or non. An O2 sensor is not required, but if you want the car to run nicely, just add one to your exhaust. The Z31 ECU is designed for the 259cc injectors, both n/a and turbo, there is no hacking or monkeying required to get it to run on any L28. It simply measures air flowing into the engine and meters fuel to burn. There are wiring diagrams in the service manuals that can be used to make a conversion. As far as I know, there is no cookbook recipe or "how-to", as to date, all conversions vary depending on ECU used, car and engine converted, and skill/thoroughness of the convertor. Sorry about the late response. Quote Link to comment Share on other sites More sharing options...
datsunlover Posted December 28, 2003 Share Posted December 28, 2003 Doesn't the z31 use a proper tps? Or is it a switch type like the 280z/zx system? I would assume the z31 ecu needs the proper signal from all it's sensors to meter fuel...so you'd need the z31 harness and all sensors for it to work properly.. Just out of curiosity, has anyone done this to a 280z? If so, got any write up/instruction on it? Quote Link to comment Share on other sites More sharing options...
kalium99 Posted December 29, 2003 Share Posted December 29, 2003 If I can't get a 300zx ECU for the right price, I would be interested in knowing how to hook up the 300zx MAF to the stnd 280zx ECU. If I had a 280ZX ecu pinout, and a stnd AFM I would prolly suss it out. Unfortunately I have neither. Does anyone have an ECU pinout and recordings of the AFM outputreadings etc Cheers Quote Link to comment Share on other sites More sharing options...
Brad-ManQ45 Posted December 30, 2003 Share Posted December 30, 2003 The 280ZX ECU is not set up for MAF, only the 300's are. Quote Link to comment Share on other sites More sharing options...
Guest smoov280zx Posted December 30, 2003 Share Posted December 30, 2003 Wouldn't the 300zx ECU be trying to meter fuel to a 3.0 instead of a 2.8, making the mixture too rich at any point? Or does the 300zx ECU have enough flexability to change the fuel that much based on the O2 sensor's input? And would you have to change ignition to the 300zx unit also, assuming it uses CAS, I like my new 1980 dizzy just fine, all the 1983 dizzy ever did was make my car slower. Mitch Quote Link to comment Share on other sites More sharing options...
kalium99 Posted December 30, 2003 Share Posted December 30, 2003 The 280ZX ECU is not set up for MAF, only the 300's are. I realize this, but the ECU doesnt know weather it has an door-flap AFM or a hot-wire MAF, all it sees is voltages and resistence. Im not sure exaxtly what sort of outputs the MAF has, nor the 280zx AFM, but it may be possible to run the MAF on the 280zx ECU with slight modifications....who knows. Quote Link to comment Share on other sites More sharing options...
SleeperZ Posted January 2, 2004 Share Posted January 2, 2004 Wouldn't the 300zx ECU be trying to meter fuel to a 3.0 instead of a 2.8' date=' making the mixture too rich at any point? Or does the 300zx ECU have enough flexability to change the fuel that much based on the O2 sensor's input? And would you have to change ignition to the 300zx unit also, assuming it uses CAS, I like my new 1980 dizzy just fine, all the 1983 dizzy ever did was make my car slower. Mitch[/quote'] No, the Z31 ECU meters fuel to the air coming in the motor. Because it is designed for a 3.0 means it has a greater potential to make power in a 2.8 liter. Quote Link to comment Share on other sites More sharing options...
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