ok so this is my single turbo engine specs

*13b s7 doweled, 3mm apex seals, stage 2 porting
*lt10 microtec
*garret t4 t66 twin scroll compressor side
*holley red lift pump into swirl pot into bosch 044 fuel pump into porsche fuel filter.

420 bhp atw on 16 psi

*toyota supra 5speed
*ford 9inch diff
*willwood breaks etc

all in a 1978 rx7

 

not bad i just tuned an fc 13b half bridge turbo on e85 16psi made 473 11.00 afrs

 

is that safe ratios. what would it do on 95-98 octane