driving around with 410cc rdx fuel injectors with stock ecu
06-17-2019, 08:15 PM
#11
Have you ever washed out a cylinder? Do you know how much fuel is needed and the run time running super rich to do that on an engine that has good sealing rings? Yielding on the side of caution is good. Sometimes you gotta do what the original poster is doing and he's going to be completely fine.
06-26-2019, 04:21 AM
#12
Have you ever washed out a cylinder? Do you know how much fuel is needed and the run time running super rich to do that on an engine that has good sealing rings? Yielding on the side of caution is good. Sometimes you gotta do what the original poster is doing and he's going to be completely fine.
06-26-2019, 11:16 PM
#13
Not much at all. Gas is a solvent and eats the very thin film of oil between the rings and cylinder walls. Any amount of fluid that is left behind from not combusting can cuase scoring to the cylinder. Ive unfortunetly experienced this more then once on this engine from bad coil pack on enfine break in to poor engine mangement fuel delivery. Putting a larger then factory injector in each cylinder with a factory ecu fuel map ls taking unecisay risk. In my experience the short and long term fuel trims cant cope with a bigger then stock 360cc injector. But my experience was with 440cc, not 410cc. Play at your own risk. E85 also has a much llwer flash point then refular gas (which is what makes it so good for controling detonation for big power) but that also means at low engine duty its arguably more prone for fuel washing/over saturation without proper ecu management.
Last edited by s2000Junky; 06-26-2019 at 11:21 PM.
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kenstyle (06-27-2019)
06-27-2019, 12:39 AM
#14
Not much at all. Gas is a solvent and eats the very thin film of oil between the rings and cylinder walls. Any amount of fluid that is left behind from not combusting can cuase scoring to the cylinder. Ive unfortunetly experienced this more then once on this engine from bad coil pack on enfine break in to poor engine mangement fuel delivery. Putting a larger then factory injector in each cylinder with a factory ecu fuel map ls taking unecisay risk. In my experience the short and long term fuel trims cant cope with a bigger then stock 360cc injector. But my experience was with 440cc, not 410cc. Play at your own risk. E85 also has a much llwer flash point then refular gas (which is what makes it so good for controling detonation for big power) but that also means at low engine duty its arguably more prone for fuel washing/over saturation without proper ecu management.
06-27-2019, 10:26 AM
#15
06-27-2019, 10:15 PM
#16
06-28-2019, 09:52 AM
#17
06-30-2019, 10:41 PM
#18
07-09-2019, 05:47 AM
#20
I ran my 2.4 stroked S off of the stock ecu with RDX 410cc injectors, it ran...….ok, just good enough for me to putz around and get the readiness monitors set so I could pass NJ emissions inspection. I drove it for about 50 miles. Never reving high and always on light accel. AFR was a almost perfect believe it or not. My guess on a stock block it would run rich and eventually set a rich code (p0172)