vega Posted August 30, 2010 Share Posted August 30, 2010 Well I have done a LOT of research recently into some things about whats going on with fuel options for my 280z. So it turns out that the distributor I have on my 78' has a magnetic pickup. It also has six teeth in it as well to send an analog signal out to the "transistor ignition unit" which I guess is just a fancy name for a ICM when transistors were coming out for cars with efi. So basically I am going to get rid of the stock TIU. Use the signal that it was getting from the distributor from the pickup coil in the distributor, there are 2 inputs on the icm for the pickup coil/sensor. The gm ICM then translates the analog signal to a digital signal to send to the gm ecu (a 7730 model) which I am going to wiring up based on pin to pin basis. I may need to add or subtract some senors. In particular I need a intake air temperature sensor an o2 sensor etc. I just ordered up a wiring diagram that is in full color for my 78 datsun that is laminated and 11x17 it will be here in 6 days. I just need the ecu and ICM so I can wire it up. Now what I am looking to know is what the stock injector size is on the 78 datsun 280 2 seater 5 speed 8.3 compression- mine are green if memory serves. I grabbed 4 pin (hole) bosch injectors off of a galant motor from work that the timing belt went on. Its a 99 galant v6 3.0 lt sohc. The 4 pin style vs 1 pin are better for atomization of the fuel so I would like to use them plus they work and are free- and free is good. Quote Link to comment Share on other sites More sharing options...
jc052685 Posted August 30, 2010 Share Posted August 30, 2010 Stock NA l28 injectors are 190cc if I recall. Atomization is a non issue with the L28e. All 6 injectors fire at the same time. The fuel just pools behind the closed valves anyway. Quote Link to comment Share on other sites More sharing options...
FlatBlack Posted August 30, 2010 Share Posted August 30, 2010 http://forums.hybridz.org/index.php/topic/55910-injector-opening-times-spread-sheet/ Quote Link to comment Share on other sites More sharing options...
vega Posted August 30, 2010 Author Share Posted August 30, 2010 thanx much- what does it mean by hose type btw? mine is on an actual fuel rail JUST like the galant. Quote Link to comment Share on other sites More sharing options...
FlatBlack Posted August 30, 2010 Share Posted August 30, 2010 (edited) thanx much- what does it mean by hose type btw? mine is on an actual fuel rail JUST like the galant. Barbed vs. O-ring. I have VR-4 Mitsubishi injectors and they are O-ring...... I think most cars have "actual fuel rails." Edited August 30, 2010 by FlatBlack Quote Link to comment Share on other sites More sharing options...
Xnke Posted September 4, 2010 Share Posted September 4, 2010 Those injectors are likely going to be a little bigger than stock...If the GM ECU can handle them, cool. If not, well, get ready to tune that hexcode till you get it right! Shouldn't be a big deal to tune a 7747, though Quote Link to comment Share on other sites More sharing options...
vega Posted September 4, 2010 Author Share Posted September 4, 2010 i will be using a 7730 it the 7747 the mclairen ecu? Quote Link to comment Share on other sites More sharing options...
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