I have a very expensive 1UZ build nearing completion and am becoming more than a bit nervous about its initial crank up and breakin with an aftermarket standalone ECU.
This will be the first time the motor has seen the ECU, and vice versa. Matter of fact, it'll be one of the first times this ECU will be used in this application, with these injectors, etc. Lots of unknowns to sort out.....
I'm of the opinion that the first minute or two of running are the most critical for a brand new motor breakin because this is when the rings are going to have their best chance to seat....or not. This is not enough time to get a brand new EMS with brand new maps, dialed in with the proper AFR's to enhance the seating and breakin process. AMHIK. There are others who have washed cylinder walls, glazed rings and otherwise royally stuffed up a very expensive engine build during the initial breakin of the motor. It's not a popular subject, and one which professional tuners don't like to talk about, but it happens more often than the tuners care to admit.....
Using a stock ECU, the stock fuel system, a stock harness, and the stock dizzies might be one option for breakin, however I don't have any of the above, and even if I did, they might not play well with the rest of my setup.
So I'm actually considering breaking in this motor with a carburetor setup, or possibly even an ancient Impco LPG mixer setup. I would allow the ECU to control the ignition, but would turn off the injectors until I was happy with the breakin, as evidenced by good compression & leakdown numbers.
Anyone else have some actual experience with this, or know of a better solution?
John
This will be the first time the motor has seen the ECU, and vice versa. Matter of fact, it'll be one of the first times this ECU will be used in this application, with these injectors, etc. Lots of unknowns to sort out.....
I'm of the opinion that the first minute or two of running are the most critical for a brand new motor breakin because this is when the rings are going to have their best chance to seat....or not. This is not enough time to get a brand new EMS with brand new maps, dialed in with the proper AFR's to enhance the seating and breakin process. AMHIK. There are others who have washed cylinder walls, glazed rings and otherwise royally stuffed up a very expensive engine build during the initial breakin of the motor. It's not a popular subject, and one which professional tuners don't like to talk about, but it happens more often than the tuners care to admit.....
Using a stock ECU, the stock fuel system, a stock harness, and the stock dizzies might be one option for breakin, however I don't have any of the above, and even if I did, they might not play well with the rest of my setup.
So I'm actually considering breaking in this motor with a carburetor setup, or possibly even an ancient Impco LPG mixer setup. I would allow the ECU to control the ignition, but would turn off the injectors until I was happy with the breakin, as evidenced by good compression & leakdown numbers.
Anyone else have some actual experience with this, or know of a better solution?
John