turbo system for ppl with y7 & y8 motors
 

anyone done a homemade setup that kept the A/C? with the y7 or y8 motor?

Re:turbo system for ppl with y7 & y8 motors
 

yup. it's fun as hell too!!

Re:turbo system for ppl with y7 & y8 motors
 

got some pix ... lol

Re:turbo system for ppl with y7 & y8 motors
 

i'd like to see pix too, what mani/dp como did you use o keep the AC?

Re:turbo system for ppl with y7 & y8 motors
 

with my setup, i used a greddy manifold, with the BMC Racing adapter to a 14b turbo. i cleared the a/c. unfortunally, the turbo is bad so i am getting another one. you have to shave a little part of the block but it doesnt ruin anything.

Re:turbo system for ppl with y7 & y8 motors
 

you can click on my page in my sig for pics and setup.

Re:turbo system for ppl with y7 & y8 motors
 

I have a T3 and an Ebay mani, the dp outlet ends up literally 2" from the back of the AC compressor. I took my setup to a local muffler shop to get a dp squeezed in there, at first the guy was like, no way, thats impossible, I left, came back a little while later to pick up the flange for it, and he already had a dp roughly formed for me. He took a piece of 2" tubing, flattened it, turned it down, cut it at the smallest possible angle, and then hammered dents into it so it would clear the bolts on the back of the compressor... lol. It looks like crap, and I am sure it is extremely restrictive, but it works.

Thats what I get for getting a normal muffler shop to do custom work for me.

Re:turbo system for ppl with y7 & y8 motors
 

i just read your webpage.. lo/hi 45/46 .

corrections:
lo hi
1k -47 -50
2k -46 -49
3k -46 -46
3.5k -46 -46
4k -46 -48
5k -46 -49
6k -46 -49
6.5k -46 -50

ARE YOU INSANE!?

kinda lean on the hi side ain't ya? (-50%)
450-50% = 225cc!
450-47%=238.5cc
450-46%=243cc

sorry to jack the thread like that but whoa! these had to be brought up. Please tell me there's some good reason you run that lean?

Re:turbo system for ppl with y7 & y8 motors
 

yeah...i know it looks like a crackhead came up with those settings, but all the corrections are almost at -50 now at hi since i've been running 10-11psi.

DO NOT use my settings folks. i put them there for a reference!!!

it was wideband tuned on the dyno and now it's tuned daily with a techedge wideband unit. when i first set my settings my hi settings would progressively go to -35, but it was soo rich that the tuner couldn't even read it and i was losing over 20whp and we slowly moved the settings closer and closer into the mid to higer -40's.

i've been boosted for almost 13k miles and have been at 10-11psi for almost 5k miles and i beat the sh#t out of it.

it still runs rich...afr is in the 11.5-12.0 range all the way...sometimes it dips down even lower. i've never gotten any detonation.

the only thing i can think of is that maybe it's not breathing well with the 2"intake and filter, the 450cc injectors are flowing more than 450cc, obd2 is doing a whole lot of extra fueling, clutch isn't holding well (still have stock one in), wtf???

the only thing that makes me think that the intake isn't really the problem is that i was getting 145whp at 6psi when i first installed it...this was on y7 that dyno's at like 90-95whp stock. i'm thinking when i finally replace my clutch and instally my y8 tranny and intake manifold i'll be able to change the corrections a little, but they will still look jacked up though.

i will even boost in lo throttle % getting 14.7 afr up to 5-6psi and not get detonation, but anytime it starts to boost that high at lo trottle i'll just floor it and it hits the fuel tables that take it immediately to 10-11psi and go rich into the 11 afr range.

i'm more than happy to take anybody for a ride to prove it.

sorry for the long response, but i think it is definately warranted so nobody thinks i'm full of sh#t. and again...please NEVER use somebody elses settings, because every setup is different even if it's the exact same setup.

Re:turbo system for ppl with y7 & y8 motors
 

Wow, that's fucked up. Maybe the injectors aren't really 450cc? If I would have used those settings my car wouldn't have moved. It would have been very easy to tell it wouldn't work. What is the altitude where it was tuned? Not that any altitude would make that big of a difference, but damn, there has to be some sort of explanation...... ???
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Re:turbo system for ppl with y7 & y8 motors
 

btw...the corrections are not exactly mathmatical to fueling...the correction is correcting the voltage to the map and not nec to the injectors even though by correcting the map voltage you are indirectly correcting voltage to the injectors. when i finally got my car to idle correctly and run smoothly in lo throttle i mathmatically came up with the settings of -46 which should make it equivalent to 240cc injectors, but things change greatly when you change open/closed loop and use preset fuel table voltages going to the injectors. maybe my ecu is adding more voltage to the injectors and fueling more than normal...or maybe my 450cc dsm are just fubar'd.

if anyone has some new/freshly reconditioned 450cc injectors to donate to the experiment i would be willing to swap them in to see if the settings need to be changed or if they remain the same.

Re:turbo system for ppl with y7 & y8 motors
 

i went ahead and updated my most current corrections/settings and they look even scarier. i also added a disclaimer because they probably won't work on someone elses car and i don't want someone to use my tuned settings and blow their sh#t up.

remember folks set initial settings safely rich and WIDEBAND tune and lean them out to a safe afr.

Re:turbo system for ppl with y7 & y8 motors
 

i live in canada.. come drive up here and i'll go for a ride :) lmao. Glad (and a little astonished) to hear it runs that good with your settings. Is your fuel pressure modified (pump, fuel lines, FPR) ?? that could affect those settings aswell.

Where are u located.. higher alt could also affect those.

Re:turbo system for ppl with y7 & y8 motors
 

this is the screwy thing...i have a walbro i was going to install, but never got around to it, but i would be even richer than i already am. stock fpr, etc. as for altitude i live in the "dirty south"...aka the atl. i've definately got 450cc inj. they are bluetops and they have 450 molded to the sides...matching pictures posted in previous threads. the guy i got them from said they were cleaned and flow tested. they were really clean and i did test them to make sure they weren't sticking, but maybe they are flowing more at high boost.??..?

something i began thinking about recently is instead of hooking up the afc normally to adjust the map sensor...why not somehow hook it up just before the injectors and then use a missing link? the link would prevent the map from seeing boost and then the afc would truely, mathmatically correct the injectors, or have more control over the injectors.

i don't know...i can't explain it, but i'll keep on using my setup the way it is as long as it runs right and i'm getting good afr.

Re:turbo system for ppl with y7 & y8 motors
 

another reason i might run so rich is that i put my primary o2 sensor in the exhaust manifold in the stock location. maybe this extra heat that the turbo places on the manifold causes the o2 to provide more fuel. i do get cel at times for too rich.

damn it...you guys got me thinking too much now.

Re:turbo system for ppl with y7 & y8 motors
 

My AFC settings are alomst the same as yours. No I didn't copy them, I tried like everyone else says "Go -35 for low and high and then lean out gradually." I stay in the dirty dirty (New Orleans) and we are below see level.

I am running 450cc injectors, 8AN fuel line, Bosch fuel pump 405lph, AEM fuel rail, Aeromotive FPR. I have my O2 sensor in the turbo exhaust housing so that could also be a reason why the car runs rich.

Just to let you know that you aren't the only one out there with weird AFC settings.

Re:turbo system for ppl with y7 & y8 motors
 

my y7 runs really rich too dude.. im at like 42% in boost dyno tuned.