Question about FMUs
#1
Question about FMUs
Hey guys i am going to be starting to gather parts for a custom turbo kit using a small DSM t25 , at the stock wastegated 8psi. I have a DOHC ZC motor and i was wondering if i could use a vortech FMU 10:1 or 8:1 for management and be safe? I do NOT plan to go past the 8psi until i have my block work done (i am going to buy another block and do the work, then switch that in later).
Please let me know, i am trying to keep this as cheap as possible so i can get it done this summer.
Bottom line: will a vortech FMU 10:1 or 8:1 be safe enough for daily driving t25 dsm turbo at 8psi (will be intercooled).
Please let me know, i am trying to keep this as cheap as possible so i can get it done this summer.
Bottom line: will a vortech FMU 10:1 or 8:1 be safe enough for daily driving t25 dsm turbo at 8psi (will be intercooled).
#5
Re:Question about FMUs
Originally Posted by greddycrx
first of all, 8 psi with an fmu is not such a good idea. second of all, if you did use the fmu i would think you would have to definatly get the 12:1 to make sure you dont run lean!
#8
Re:Question about FMUs
Originally Posted by greddycrx
yeah but for 8 psi? i think you need all the fuel possible to not run lean with that shitty fmu
And for those that had goo dpump were running way rich.
Dunno... all I can say - works for me with 10:1... and by that shitty A/F meter, seems to be way rich. Still waiting for dyno to see there real A/F ratio...
#10
Re:Question about FMUs
Voltage for a single wire O2 sensor is not linear. You can't say, "Two or 2 bars rich". If you tune from that, you're going to be screwing yourself, as it only measures stoichometric, which is 14.7:1 and would be lean for a boosted application. Don't tune from your stock O2.