Hi all, I searched most all the dyno forum but still need a few q's cleared up.
Motor B18c (Gsr)
13:1 CR
Skunk2 Pro2
114 octane mix 17ltrs 114 to 3ltrs regular.
230hp 155ft/lb

Lambda currently tuned 0.9

My first question is.
Im currently running 440cc injectors with 45psi fuel regulation.
According to my s300 (approximate) max injector duty is 67%.
I have yet to quickly datalog the injector duty while driving. WILL the injector duty vary much from the pre-set (Approximate) duty-table in s300 software?

Second Q is
I believe max power n/a is achieved at 8.46:1 with E85 or .86 lambda.
Have any of you tuned a similar motor on E85 and if so did the 440cc injectors suffice? Also what fuel pressure were you running?
Oh and i have fueling sorted im running a walbro in tank, to a 1 ltr swirl pot, to a bosch 044 then to the rail.
Thanks in advance.

 

It will vary some depending on engine coolant temp and intake air temperature. But if your base is at 67% max your fine on the 114.(FYI you dont need 114 with only 13:1 compression, I run higher compression on 100 octane)
If you switch to E85 you will need injectors twice the size of the ones you have now.

To answer your second question each and every motor out there will want a different air to fuel ratio. The best way to find the right a/f ratio is to throw it on a dyno and try from rich to lean and see where it wants it.