i have a full racing turbo back exhaust with walbro fuel pump, to4b s5 hybrid with a v-trim and a hks f-con with gcc. im going with 720cc for primaries as for secondaries should i go 720cc as well or should i get something alittle higher like 850cc?

eric.

 

what ROM does your fcon have?

 

i thinki its some kind of custom one, e 1+9

eric.
.

 

sorry its a

E-1
0+9

rom chip.

 

sounds like the older version of the E series chip...now it just has a new number designation...you have the E109..go here for some infof
http://hksusa.com/products/?id=752&rsku=0
anyway...i am not sure that chip can run those injectors...call HKS and ask... i had some info here at the house but can't find it...but 4x 720cc are good for over 300-330rwhp...so you should be good...larger ones might run a little rough at x over