what fuel ratio's are required for different situations?

i have been out mapping the fuel again due to the vacume hose not being connected to the fuel regulator last time it was mapped and i was runing out of fuel with cosie greens at 14 psi

i have been aiming for..

idle to 5psi 14.7 to 14:1
then blend up to 8 psi 13:1
then blend up to 12psi 12.5:1
then up to just over a bar @ 250 bhp aim for 12:1
and up to 22psi 11.5:1

my c/r is 7.7:1 with accralite pistons farndon H section rods

am i about right with my fuel ratios ?

please discuss fuel ratios for crusing overtaking on the motorway whatever

cheers

 

well idle = 14.0 - 14.7

cruise up to 1/2 throttle = 14.0 - 15.1

upto 8 psi 12.4

high boost 11.8 - 12.0.

but also matters on your exhaust gas temps, if there high, then run richer to be safe.

i run a 875oC max at 1inch from turbo, but try to keep it at 825 - 850 and 11.8 - 12.0 on full boost.

 

thanks for the info

where is the cheapest place to purchase an egt guage ?

 

Those figures look to be a good ballpark to be in, but obviously you need to try it and see the resuls and tweak from there!