its for a friends 12.5 motor, with 310cc injectors, 255liter pump,
need to get a baseline for fuel pressure and timing so we can break it in safely?
I dont want to break in that motor like I stole it

 

bump for something I was wondering myself

 

no tech heads out there willing to help out

 

16 Degress Base and 40psi? What are you tuning it with?

 

at the moment its my borrowed chipped p28 skunk 2 prog
soon hondata but we want to break it in first
its a fully built 12.5 motor

 

Same set up here.. But with a stock GSR computer and VAFC (untill break-in, then going to hondata) I got my FP set 42psi with the vacume line closed so at WOT is at like 50-51. I have my VAFC set at like +10 at 7000rpms and its still leaning out up top (Damn the stock computer!!). Remind you I have 310's Walbro 255. Im still in my break-in period (I have around 800 miles so far) so im being careful.. You may have better luck with your SK2 computer. Your gonna need alot of fuel up top!! Cant wait for Hondata!! Good luck, Keep us posted.

Forgot to add timing is at 15 degrees to be on the safe side with colder plugs.

 

your car must be weird cos i have to run it lean up top... Jun prog in the P28
and a plus 5 in the mids for now
plugs are clean with black around the sides
and dammit im getting 22-24 mpg
but i think it has issues up top past 7k on pump gas
still working on it tho
hondata is on the way

 

for breaking something in, i'd stick like around 40 psi for fuel pressure.......and as far as the timing goes i'd start at 10 and listen for detonation or check the plugs.......if you get any detonation i'd move the fuel up 5psi at a time or you might have to retard the timing....just my 2c