mazda rx2 rotary

Set up,E85 fuel,Haltech E8,4-1600's,40psi fuel pressure,22psi of positive manifold pressure,-10 fuel line,aeromotive eliminator pump,LS2 coils with 5ms charge time and 1ms of spark brake time,trailing split from 3degrees negotive manifold pressure to 12 degrees at 20 pounds of positive manifold pressure,I just can't seem to figure out the small flutter I have,my secondary injector split is at 50 degrees across the map,my end injection is a 20 degrees BTDC at 1000 rpm and 90 degrees BTDC at 8000,last night I had the spark brake at 2ms changed it to 1ms it seemed to help a little but it still flutters some,any input or experience similar would be appreciated

mazda rx2 rotary

I just connected to the Haltech,here are a few more particulars,injection current 3amp peal and 0.8 hold,you know this is one thing I have not tried is to up the amps ?!?,semi sequential,staged injection common mode at staging bar 11,trigger multiple tooth rotary reluctor rising,I never really under stood the extra load bar for staged injection but close to the same line on my .50 psi positive manifold pressure,meaning from 0 rpm at 1.458 injection time to 8000 at 4.358 injection time,this might also be a problem I have the standard 250 RPM cel blocks from 0 rpm to 7750 rpm,I exceed the rpm by 750 limited to 8500 on the rev limiter,but from what I understand once you pass the RPM or boost on the map the ecu will continue injectiing and continue holding the timing in the last cells exceeded?

mazda rx2 rotary

Duh just kinda answered my own question,didn't think about it till just Now,I have known this for 20 plus years,there are three operating peramitors in any electrical component,volts ohms and amps ,if you know two out of three you can figure out the third by simple math,example 14.5 operating volts 4.2 ohms in the injectors,devide the ohms into the volts and there is the amps needed to run the injectors ,the math says I need 3.5 amps to run these injectors,I'm at 3 amps peak and .8 hold,this might be a little weak

mazda rx2 rotary

It's amazing what a click of a button will do DAM,upped the injector current to 5 amps and what a difference,I have to take away a Ton of fuel,the fuel scale is down to 80% and still way fat,more tunning needed,Got to love the freeway dyno

Osirus9

iTrader: (10)

Well I'm glad we could help