maz87t2

iTrader: (6)

i was wondering if i would have any trouble running 720's and 1200's with my rtek 1.7 and a safc.
my combo
87 n/a with turbo 2 engine and large street port.
t04b turbo 51mm inducer smaller turbo
walbroh 255
aeromotive regulator
fmic
rtek 1.7
safc
innovate wideband
720cc primarys
1200cc secondarys

would i have any stumble? how close are the percentages with the 720s and the 1200's compared to the presets 550s and 720s. i just want to make sure i have enough fuel. i am reading alot ab tuning and what not. any info would help. im gonna try to tune for afr in the 12's.

turbo2ltr

iTrader: (1)

The larger the difference in the pri/sec, the harder it will be to tune the transition. A 1.8 might be a better choice.

maz87t2

iTrader: (6)

well i already bought the 1.7 cause i planned on running 550s and 720's but then went with a different turbo and needed bigger injectors.

turbo2ltr

iTrader: (1)

Contact us if you want to upgrade to 1.8. It's only $10.

maz87t2

iTrader: (6)

what if i just stick with the 1.7. is it gonna be hard to tune?

DAVIDP

iTrader: (1)

I'm running a similar setup using 720cc primaries & 1000cc secondaries with an rtek 1.5. To get enough fuel at the top end I had to use 48 psi static fuel pressure with a rising rate regulator. I don't think the super afc can add very much to the air flow signal because I pretty much max out the air flow meter. The higher fuel pressure makes the low end rich so I used the super afc to subtract some fuel there. I try to keep my afr's in the 11's. I have my throttle position signal wire connected to the boost sensor wire. The hardest part is gettng it to run smoothly down low, the low throttle settings worked well. I'm happy with the rtek 1.5 chip I mostly added it for the timing retard feature. I used to get a slight knock in cold weather without the chip now it's gone completely. I have no problems with the idle or running in closed loop afr's stay right at 14.7.

My setup
S4 Turbo
Denso competition fuel pump (rewired)
Aeromotive rising rate fuel pressure regulator 48psi static
720cc primaries 1000cc secondaries
SAFC
Stage 3 Hybrid turbo running 15lbs boost
Hks 3in downpipe and midpipe with 2 1/2" dual exhaust
Racing beat 85psi oil pressure regulator
Racing beat Oil baffle seperator plate
Cold air box with air feed
K&N cone filter
Koyo radiator
Tmic with heat shield removed
Water injection
Rotorsports racing 2mm apex seals
Stock ports polished
NGK Br10eix leading spark plugs .025 gap, Bur9eqp trailing
Innovate Motorsports lc-1 wideband 02
Egt gage
Boost gage
Air intake temperature gage
Oil temperature gage