difference in 2 psi
11-10-2009, 10:18 PM
#1
Banned
SL Member
Thread Starter
Join Date: Nov 2007
Location: Germantown, MD
Posts: 2,893
difference in 2 psi
WOW lol so my afr were in low 11's with my safc set to +38% on 410cc injectors with a to4e on 4psi
i decided to change my wastegate source to the brake booster to get 6psi and WOW i maxed my SAFC at +50% and it was at 12.9 afr and PULLING like a frieght train man if only i had bigger injectors so i could leave it at 6psi
i decided to change my wastegate source to the brake booster to get 6psi and WOW i maxed my SAFC at +50% and it was at 12.9 afr and PULLING like a frieght train man if only i had bigger injectors so i could leave it at 6psi
11-10-2009, 10:44 PM
#6
Yea you def arent maxing out the injectors - im running the same injectors at 7psi on a T3/T61 - making 7.2-7.5 psi according to fic datalogs - and i have no problem maintaining 11.2-11.5 afr under full boost all the way to redline. Also on my original more conservative map it was hitting as rich as 10.3 under full boost (still 7 psi) - i had to lean it up a bit to get the afr more where i wanted it (11.2-11.7). Ive tested the current map down to around 45F outside and it runs great with a constant well maintained afr. Maybe the SAFC is the restriction?
11-10-2009, 10:46 PM
#7
Also forgot to mention - i know this will affect afr - im pulling 3.5 deg of timing at peak tq - leveling off to -2.5 deg at redline - i dont think the safc can pull timing so that may be some of the issue.
11-10-2009, 10:52 PM
#8
WOW lol so my afr were in low 11's with my safc set to +38% on 410cc injectors with a to4e on 4psi
i decided to change my wastegate source to the brake booster to get 6psi and WOW i maxed my SAFC at +50% and it was at 12.9 afr and PULLING like a frieght train man if only i had bigger injectors so i could leave it at 6psi
i decided to change my wastegate source to the brake booster to get 6psi and WOW i maxed my SAFC at +50% and it was at 12.9 afr and PULLING like a frieght train man if only i had bigger injectors so i could leave it at 6psi
11-10-2009, 11:08 PM
#9
Banned
SL Member
Thread Starter
Join Date: Nov 2007
Location: Germantown, MD
Posts: 2,893
yea i think your right might be a B housing
11-10-2009, 11:09 PM
#10
Banned
SL Member
Thread Starter
Join Date: Nov 2007
Location: Germantown, MD
Posts: 2,893
Yea you def arent maxing out the injectors - im running the same injectors at 7psi on a T3/T61 - making 7.2-7.5 psi according to fic datalogs - and i have no problem maintaining 11.2-11.5 afr under full boost all the way to redline. Also on my original more conservative map it was hitting as rich as 10.3 under full boost (still 7 psi) - i had to lean it up a bit to get the afr more where i wanted it (11.2-11.7). Ive tested the current map down to around 45F outside and it runs great with a constant well maintained afr. Maybe the SAFC is the restriction?
yea its the SAFC thats restricting me because you can only tune the maf signal and well im maxing it out at + 50
11-10-2009, 11:44 PM
#11
Ahh i forgot - thats why i love the fic - it directly adjusts the injector pulsewidths by interrupting the signal to the injectors. I think the maf maxes out at like 5v - so you can only add so much fuel using the safc or any other device that tunes by increasing maf voltage.
11-10-2009, 11:50 PM
#12
Banned
SL Member
Thread Starter
Join Date: Nov 2007
Location: Germantown, MD
Posts: 2,893
Ahh i forgot - thats why i love the fic - it directly adjusts the injector pulsewidths by interrupting the signal to the injectors. I think the maf maxes out at like 5v - so you can only add so much fuel using the safc or any other device that tunes by increasing maf voltage.
yea it sucks...oh well i can always sell it and buy a fic or i can just go buy 440 injectors and make the safc happy
11-11-2009, 12:12 AM
#14
Banned
SL Member
Thread Starter
Join Date: Nov 2007
Location: Germantown, MD
Posts: 2,893
11-11-2009, 12:24 AM
#16
Banned
SL Member
Thread Starter
Join Date: Nov 2007
Location: Germantown, MD
Posts: 2,893
because its the way most people do it its really personally prefference, brake booster gives u exact wastegate pressure, makes boost come in faster and HARDER, but tends to sometimes spike
but when u have the compressor housing u dont have spike and boost is more even controlled, and if your IC piping is long and you have a big frount mount u could drop 1-2psi off ur wastegate pressure
11-11-2009, 12:52 AM
#17
Mines t'd off with the rest of my vacuum lines - including fic, guage, and bov - ive never had a problem with spikes although apparently some have. I only did it because my turbo compressor hadnt previousely been tapped when i got it and i didnt feel like taking the time to tap it 
lol I might sell my fic soon - when i go to manual swap im really wanting a standalone - i wanna rev to like 7k - hey on that note - does anyone know if you can up the redline to 7k by simply going with upgraded valve springs and retainers (no cams or valves). I know dezod sells the bc spring and retainer kit for like $280.
lol I might sell my fic soon - when i go to manual swap im really wanting a standalone - i wanna rev to like 7k - hey on that note - does anyone know if you can up the redline to 7k by simply going with upgraded valve springs and retainers (no cams or valves). I know dezod sells the bc spring and retainer kit for like $280.
11-11-2009, 12:54 AM
#18
Senior Member
SL Member
Join Date: Dec 2007
Location: South Florida
Posts: 2,603
2psi gain with that vac source change means your intercooler is very restrictive - or something between the turbo and intake manifold is causing a restriction.
Some people gain 1psi at the most.
Some people gain 1psi at the most.
11-11-2009, 01:01 AM
#19
The easiest way to know is to look at the clamps that hold the comp housing to the back plate. 3x 2 bolt = T04B, 2x 3 bolt clamps = T04E.
My CXR chinacharger has "T04E" stamped right on the comp housing but it's really a T04B.
My CXR chinacharger has "T04E" stamped right on the comp housing but it's really a T04B.
Last edited by ScionFred; 11-14-2009 at 05:36 PM.