want to upgrade turbo on new motor atkins rebuild 3mm apex street ported looking at BNR upgrade

have 550 primary and 720 secondary and afc

upgrade or stay stock?? if upgrade any suggestions

 

Staying perfectly stock is for weenies. BNR Stage 2, get all the options. Spend the money and tune that on a dyno and be happy. Very happy. 15~16# should be your goal with that setup. Have a 255lph Walbro yet?

 

yeah have the walbro

going to tune with my lm1 wide ban

15 16 psi???? will the 2 720s handle that much

 

Whoa, 15 16 psi is to much for that set up. I run a BNR stage 1 and I say 13 is just about maxed with that setup, I see about mid to high 11's. I run 10 -12 with 720 secondaries, rtek 1.5, fmic and HKS afr. I tune with the PLX M-300.

Maybe throw in some 680-720's in the primaries might be able to do it.

 

Damn your in the 11's with a stage 1

 

OOPs, meant high 11's for AFR's...LoL

 

arent afr in the 11 too lean

if i only want to run about 12psi of boost should i just go with a stage one upgrade

 

High 11's is what I see when I try to run 13psi. I run 10-12psi and the AFR's are from mid 10''s to 11.10.

 

You should be ok with the stage 2 at 12 psi.