Did you guys remove secondary oxygen sensor? If not, where did you install a wideband O2 sensor. I thought it may be an idea to remove the secondary o2 sensor and install the wideband sensor in its place, but you would have make the ECU think there is still a secondary sensor. I asked the question below and the reply is also below. What do you guys think?? Will it work??
My question to o2sim.com:
Hello, Just placed a order for a o2sim for a MINI Cooper. Im installing a turbo kit on my 03 MINI Cooper S.The downpipe does away with the cat. Other then the o2sim, do I also need to use a 20 Ohm 20 Watt resistor? or am I good to go with just the o2sim?
Thank you,

o2sim_support (Admin)
Posted on Sunday, August 13, 2006 - 3:12 pm: You can remove secondary oxygen sensor from catalityc convertor,cut signal wire, but you have to keep heater wires hooked. 20 Ohm 20 watt resistor works on most cars.We don't know about MINI cooper yet.You can try resistor and completely remove secondary oxygen sensor and let us know if it's works.

 

Hi All !! I was just thinkin, how would the turbo kit be affected if you didnt take the catalytic converter away??? and didnt put the bigger pulley on the supercharger from alta to decrease boost ??????

 

well the cat would be removed when you took off the stock header/manifold... you can always cut the alta downpipe and weld in or v clamp a cat in there... it would be nice to do, (the downpipe goes from 3inch down to 2.5 at the bottom) because then you could run a straight 3 inch exhaust all the way back!!!

if you kept the stock pulley on, the turbo would probably spool a little faster... the downside would be less efficient power. the supercharger would be spinning faster which would take up more power, and would shoot out hotter AIT's, which would make you ping and retard timing...

 

the reason i am asking is because im about to put a turbo kit on my mini that i have pieced together my self !! and i am just trying to get as much info as possible - the turbo i bought is a gt3071r but i got it set up for external wastegate,surge slots in the comp cover and a t3 bolt pattern do you think this may change much ??? i still cant fully understand how the tuning with the apexi afc is done , from what i can understand once you have bolted the turbo kit on you wire up the apexi afc meter and from this point you can tune you air/fuel and adjust the boost accordingly, is it just that simple that a $400 air/fuel meter-adjuster is all you need ??????? i hope so .............

 

a turbo setup is a turbo setup... i mean, if the stuff you have can bolt up correctly to the manifold you designed it should work... show some pics! (as long as its setup in the same fashion as the other turbo setup's on the market.

You have the APexi to control the fuel pulse width by telling the ECU via the downMAP a new voltage.... So if you want to run higher boost than what the stock injectors can safely fuel (at 80% duty)... you need larger injectors, which dictates fooling the ecu into thinking there is less boost. the ecu in turn lowers the fuel width cycle of the injectors... this is important when you've setup your wideband (which i hope you already have) to check A/F ratios... if you dont adjust fueling youll be off the rich scale of 10:1...

if you ayer on the side of caution, which i would if you want to keep your motor in one piece... keep that air fuel ratio rich! you will want to keep the a/f between 11.2:1-11.6:1 when you go WOT. Get a buddy to floor your car in 3rd or 4th gear while you check the Wideband reader and make small adjustments to the fueling on your apexi... OR... go down to your local dyno shop and get some pulls done with their own a/f sniffer... with a nice print out sheet! and go that way!

oh and hopefully you have some sort of diagnostic system, like autera (PalmOS) or a laptop style setup... to check IAT's, EGT's, manifold pressure, Timing etc.... Good luck!

 

hey, thanks for all the info mate very much appreciated !!

the chrome manifold is of a 200sx its a high mount turbo manifold with a t3 flange and external wastegate pipe im using this because im mounting the turbo up high the same as a high mount would look in a wrx and im also going to front mount the intercooler so i think that will work well ..... as you can see my gt3071r looks a bit different to the normal ones in the kit - only difference is that it has surge slots in the bell mouth , its set up for external gate and has t3 flange instead of t28 flange , so im hoping this wont have changed to much !!! i have an autometer air/fuel gauge is that a wideband ??? i dont think alta are going to sell me there pulley that comes in the turbo kit to decrease boost , will the turbo kit still work ok or will it be straining itself ???? i think i need to get a copy of the TWURBO instructions manual .... !! do you know if anyone has used a front mount intercooler on a twincharge set up ????

once again thank you so much mate !!!

josh .........

 

sorry just in case you are wondering why am i high mounting the turbo and front mounting an intercooler its because my mini is a show car ... most of the time anyway . its the most modified mini that i know off in australia , so im sort off doing the turbo set up with as much metal polishing and look good stuff as i can fit in the engine bay .... theres a lil pic to giv you an idea !!!!

thanks mate !!!

 

You can buy an Alta 10% overdrive SC pulley HERE and a 5% overdrive SC pulley HERE for $121.79 from High Performance Outlet. Good Luck -- Johan

 

You know that manifold ain't gonna work because the port doesn't match up with the head If you're not careful you might screw up the head too The turbo unit weight a lot.

 

east side !! i havent even taken the manifold down to the fabricators yet !!! of course it wont fit you can see that in the photo i took with the standard extarctors !! not much modifacation needed thankfully, as you can see only the outside runners need the work !!! hey just thinkin how would i stuff the head up ???? as for the weight of the turbo im gonna make a bracket that goes from the turbo flange to the flange on the head , some of the japanese cars have them on there manifolds thats where i got the idea from !! hey east side what do you think ?? is there maybe a better way to support the turbo ???? oh yeah not sure if i have asked man what do you think of a front mount on twincharge set up ?? has anyone done this before ???

your help is much appreciated thank you !!

josh ...........

 

This thread is great, pretty much answered all my questions. We too will be twin-charging our mini once we get it..! (Dad's and My project car). I have a Stage 2 WRX (285hp/285tq) now as a daily driver so turbo is nothing new to me. I have the same plans "stages" as you SSMini. I would think with this power a 3" exhaust would be give or take nessecesary to maximize the kits potential, so this would have to be custom if you choose to do so and dont forget your clutch.

 

After starting the motor for a few minutes, several problems occured.

1. coolant tank overheating while the radiator is warm? temperture gauge reads half way?
2. unusual intake vacuum sound at turbo inlet? (Kibry vacuum sound alike).
3. exhaust manifold turns glowing hot at idleing?
4. idle goes up/down around 1k rpm?

It seems like the coolant and engine pressure not flowing efficently causing heating problems.

 

This does not sound good

 

I havent even started on mine yet. Had issues with header and received replacement, took 3 weeks to get, but I got it back. I will start this weekend. Im no expert, but I would guess that you still have air in the cooling system. The unusual intake vacuum sound you hear, may be the cause of the idle going up and down. I know that the turbo and all will glow after a hard run, but at idle, it should not be glowing. I would let the car idle while putting coolant in till it stops bubbling (Overflow tank.) Check all your hoses to make sure you have no leaks. Let us know how it work out. Any problem during the install, besides the problems you are having now?

 

Your idle going up and down maybe be a fuel delivery issue. Ill post on the subaru forums and see if a turbo god will give you any advice.

 

i thought an idle issue was to do with a vacuum leak. Check to see if the fuel regulator is loose, or that the rtv you put on the TB to Supercharger tube is making a good seal. The Header glowing is probably becuase your running lean... why i dont know! Good luck working it out!

 

Eastsidemini, Hows it going? Any luck in fixing the problems? Please keep us informed Finished up buying all that I need to install mine.(I hope.) I hope to start on it in the morning. How long did it take to get yours installed?
Thanks...

 

Im sitting here reading the instructions before I start the install. My question is, page 2, #11, 4th dot down. Per instructions:

Remove lower plastic mounting base under air box, cut half of the base off, and reinstall. See PIC#?

There is not one single PIC with my instructions. Do any of you have a pic of how much is to be cut? I know half, do they mean, side to side or front to back? Just what to MAKE sure before I go choping things up. There are a few instructions that state "See PIC" where are the pics?? Any of you get pics with your instructions?

 

I got up early this morning and change out the thermostat and hoping it will solve the heater tank overheating problem, it didn't work. Seems to me the coolant hose from the turbo to the overflow vent is overheating and not the block. I went out for half a day to think things over and talk to several people about the exhaust manifold issue and they all agreed the exhaust gas is building up within the turbo causing the weire vacuum blower sound and causing the manifold to glow. I dis-connect the actuator clip to the wastegate and left it to the open position then start up the motor again this afternoon, the weild vacuum/blower sound dissappeared but now a lot of smoke is coming out of the tailpipe (LOTS OF SMOKE)

Talked to Tricklex and he said it could be a bad turbo burning the coolant causing the smoke Since it is a long weekend and could not contact Jeff from Alta to address the problems Finally gave up and installed the autometer boost gauge.

 

Cut it from left to right (side to side)all the way till the aluminum tubes. That is to clear the big silicone/intake hose and filter. My instruction didn't come with any pic too. Alta should have provide with pic which makes the installed much easier.

 

Sorry to hear.

 

Eastsidemini, I could not remember if you one of the guys that bought there used or new. I know that there was a post here were a guy got his installed and smoke just poured out of the exhaust. I think it may have been a bad turbo. If I remember right, he got tired of the system and it pulled out. The reason I ask if you got it used or not, My kit did not come with a oil restrictor. If that is not in place, toooooo much oil goes into the turbo and it may leak past the seals and cause the smoke. The restrictor is a TINY brass piece that goes in between the turbo and oil line going to the turbo. When I received mine from Alta, I could not believe how much it restricts the oil. The hole that the oil passes through is no bigger then a ball piont pen tip. VERY,VERY small.

 

Where is Alta on this issue?

 

My kit is still in the box. Im a little nervous about installing mine now. I would REALLY hate to install the kit and have these problems.

 

It is new and I did installed the oil restrictor in that line.