Hi,
As the title suggests I am having a little trouble with my tune on a rb25det with a gt30 bolted on. Mods are as follows:
all supporting fuel mods, pfc Pro, zaust cam gear 3' neg, 3 inch zaust etc etc etc... Oh yea, running 19.5 psi...
The A/F ratios are just below 12:1 but so close you could say 12:1...
after we got the fuel right we started to add timing, but once we hit about 245 kw she started to ping badly, Big Carl had the same setup and made 260 kw... I cant think why I am experiencing this pinging, possible reasons are:
bad fuel?
oil in the intake piping?
F*ck, I dont know
any ideas why I am experiencing this pinging? We did not get a chance to wind much timming into it due to the pinging...
Would it be better to add a little more fuel to allow for more timming?