Hypothetical observations, and inquiries to you guys.

As some may know, I have the stroker motor now, with the mods below. I am breaking the motor in, with the stock injectors (as recommended). I have been breaking it in to a "T", and noticed, the AEM UEGO A/F gague looks like I still have the stock bottom end. it will run at 14.5-15.0 on the gague, with steady throttle. I have only got the boost up to 10-15 (to seat the rings), and when I do a "brisk" acceleration, weather from a start, or step on the gas at 60MPH, just to build up boost, the A/F gague goes super rich (3 red dashes on the gague), then goes to 11.5. again, I dont FLOOR the gas to the floor, but "tap" steadly on the gas, (maybe 1/2-3/4 depressed to floor) to see what the A/F ratio will do.

It is just like I still have the same bottom end. I did see on another thread, that the stock injectors you change with a bigger turbo, AND that they dont work so hard if you shoot methanol, which I am. My question is: Is it NECESSARY to get larger injectors?

Or is this just a dumb question? Does anyone else have any input. I will probably get larger injectors anyway, just curious if this is just following the sheep, or it is NECESSARY. (Again, mods below, and will be shooting Methanol, with the AMS progressive set-up)

As always,

Thanks in advance!

 

With the TME turbo, and using alcohol injection I don't think there is any need for upgraded injectors really. The stock injectors have a LOT of head room compared to stock injectors in other high performance cars out there, and on top of that you have alcohol injection.
As long as you monitor the A/F ratio closely as you tune the car after it is broken in and ready for heavy boost I don't see a problem. If you find that it IS starting to run out of injector when you tune it, let us all know

Keith

 

Thanks, great answer Keith, I will try it, and let you all know. I know I have the option to change to larger injectors, but I dont see any difference in my A/F ration on my gauge at 1/2 to 3/4 throttle. but then again, I am not at WOT yet, and am NOT using my Methanol either, so I think I have some "wiggle room" once I turn on the Methanol.

Thanks again,
Kevin

 

Whatever you're using to tune the car with, just log the injector duty cycle parameters once the car is being tuned for power. You'll be pulling fuel due to the meth injection, of course, but also pushing more fuel due to the larger displacement and turbo. It also depends on how much meth you plan on spraying and how much boost you plan on running... your tuner should easily figure it all out. =]

 

Cool, thank you!