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Forced Induction Forum Sponsored by Active Autowerke
Discuss supercharging, turbocharging and even nitrous and water injection here.
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Old 03-31-2011, 05:16 PM   #221
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Quote:
Originally Posted by gurov View Post
i've been driving this thing all over the place. the tune is spot on, vanos control works wonders on the powerband.

there's still a few minutes of lean misfires after a very cold start, but i'm just too lazy to tune that out.

i've been meaning to get some videos..., just never have enough hands to hold the camera and drive.
Oh that's a beautiful thing that you can drive it anywhere you please. Would you trust this car on a long road trip say to Miami or even Maryland for the Bimmerfest that's coming up this year?
Yeah Video's of the car would be nice.
Now that You've figured out how everything needs to run how simple or how long do you think it would take to do it all over again?
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Old 03-31-2011, 07:22 PM   #222
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That is so aweosme.

Moar pics and vids
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Old 03-31-2011, 07:54 PM   #223
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nice projects!

My gawd this turns me ON!
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Old 03-31-2011, 09:43 PM   #224
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just drove the car like 60 miles on the highway. the new turbo is a LOT laggier, but when it gets going it does so quite nicely.

the upside of all the lag is that tuning is now a tad simpler as there's no instant boost anymore, and fuel economy should be slightly better.

i think i could trust this car... there's a couple of thousand of miles on the setup so far with trans control (with no discernible performance degradation).

to do it all over again ? this would be very very simple. the engine controls are very straight forward and tuning is mostly just driving it with live ve tune on.

i have an OBX exhaust sitting at home dual 2" pipes, waiting to go on in the next week or so.
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Old 04-03-2011, 08:21 PM   #225
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the new exhaust helps a bit with the lag, and the car sounds much better now, not to mention the exhaust is a ton easier to work with as it comes in sections, lighter, etc.

this was an obx e46 3 series sedan exhaust. it doesn't quite fit the XI as the very front resonator hits the transfer case mounting. but otherwise the exhaust would fit up.

what i had to do was rework the bends as well as make a merge into a single 2.5".
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Old 04-04-2011, 09:35 AM   #226
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Almost a full year working this project.......Holy Crap! I would have blown the car up by now.
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Old 04-09-2011, 03:08 AM   #227
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Bump for ya gurov

Would you care to share your IAT resistance table ?
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Old 04-13-2011, 03:14 PM   #228
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You are a Mad Genius Gurov! I've been hooked to this thread for the last couple of days reading through your entire build, it's like crack. Thanks for such a detailed build! Great work.
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Old 04-13-2011, 05:28 PM   #229
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Excellent work my dude, glad to see there's fanatics that are determine to get things done! This is a project that everyone here would I've said it won't work! Great job. What do you think of running a setup like this on pro efi
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Old 09-09-2011, 04:29 AM   #230
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sorry, but could i ask u about Auto trans. Looking for any information about working with turbo.
Too many pages here ...

Thanx a LOT!
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Old 09-09-2011, 10:18 AM   #231
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Quote:
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Almost a full year working this project.......Holy Crap! I would have blown the car up by now.
nah, i have safeguards to prevent me from getting too overzealous with timing. i have to keep the boost down-ish to prevent trans damage... although i might start upping it so it does blow up so i can do a swap.
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Old 09-09-2011, 10:26 AM   #232
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Quote:
Originally Posted by NYC'z Mr.e46 View Post
Excellent work my dude, glad to see there's fanatics that are determine to get things done! This is a project that everyone here would I've said it won't work! Great job. What do you think of running a setup like this on pro efi
proefi would probably work. i went with megasquirt because my other cars run on megasquirt and i'm very familiar with it and how to set it up.



the auto trans is a love-hate thing for me.

i love that i don't have to shift it most of the time, and i can just be lazy and handle traffic fine. torque converter also DOES make it rather quick off the line without ****ing around with the clutch. plus 4th gear is pretty cool, no moving inside the trans in that gear (for the most part, 1:1 ratio). shifting under boost is also a rather interesting feeling.

the hate is that it makes the car slower and software i'm using on the transmission controller is rather primitive, and not really meant for a refined-feeling vehicle. there's bugs in it, but i've learned to work around them, or just switch it to manual and up/down shift on my own.

furthermore, i have no idea whether the trans is taking more or less abuse, it doesn't feel any different than when i started modifying it, still same speed shifts, etc.

for reference, the trans is a GM 5l40e, 3 shift solenoids, torque converter clutch and main pressure solenoid. 3rd shift solenoid controls whether the one way clutch is on or off in gears 1-4. there's input and output shaft speed sensors, i have the tooth counts around somewhere for determining rotational speed, slip, etc.
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Old 09-09-2011, 10:30 AM   #233
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You are insane (in a good way). The amount of work you did in a year is unbelievable.
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Old 09-09-2011, 10:34 AM   #234
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Quote:
Originally Posted by Pir4t View Post
Bump for ya gurov

Would you care to share your IAT resistance table ?
sure:


http://gurov.us/325xiiatfactor.txt

http://gurov.us/325xicltfactor.txt

these are straight out of OBD2 translations. i.e. i hooked up obd2 reader (one of the few i got off ebay) and a variable resistor to where the sensor would normally go, i captured voltage and what obd2 reported for temperatures.

the files contain 1024 lines because they are for mapping a full 10 bit ADC to temperatures.

so 0-1023 is assumed based on the line number, the value is temp in F * 10 ( to get the decimal in there).

i use no bias resistors in my megasquirt box, so these are just reading voltage from the NTC junction using what the stock DME has for bias resistor for NTC and using those voltages.

where are you looking to use this ?
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Last edited by gurov; 09-09-2011 at 10:40 AM.
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Old 09-09-2011, 10:39 AM   #235
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oh, another thing, i had to cut a hole in the hood, as the turbo made a dent in it... sticking up too high.

speedhole:


that looked rather ugly, so i covered it up with a strut tower cover from a 90's silver dodge stealth. it's still somewhat ugly, but at least it's not a hole through the hood.







the big braided hose you see there is my attempt to fix my AC system. the manifold rubbed through the stock hose, and since the car ran so well that it never really got into the garage to be looked at by me, i didn't notice the hole in the hose until it was too late. so those are custom AC lines now.
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Old 10-29-2011, 11:16 AM   #236
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Old 10-29-2011, 02:56 PM   #237
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Quote:
Originally Posted by gurov View Post
sure:


http://gurov.us/325xiiatfactor.txt

http://gurov.us/325xicltfactor.txt

these are straight out of OBD2 translations. i.e. i hooked up obd2 reader (one of the few i got off ebay) and a variable resistor to where the sensor would normally go, i captured voltage and what obd2 reported for temperatures.

the files contain 1024 lines because they are for mapping a full 10 bit ADC to temperatures.

so 0-1023 is assumed based on the line number, the value is temp in F * 10 ( to get the decimal in there).

i use no bias resistors in my megasquirt box, so these are just reading voltage from the NTC junction using what the stock DME has for bias resistor for NTC and using those voltages.

where are you looking to use this ?
Im looking to use the stock sensors with my link , which doesnt have a correct table for it (only standard Bosch NTC and some others)

The files dont make sense to me though , if i take the value and divide it by 10 i get the F temp , but what about the resistance ?

BTW , time for a M3 bulge hood ? (or maby that wont do ya anything good either)
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Old 10-30-2011, 06:38 PM   #238
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Quote:
Originally Posted by Pir4t View Post
Im looking to use the stock sensors with my link , which doesnt have a correct table for it (only standard Bosch NTC and some others)

The files dont make sense to me though , if i take the value and divide it by 10 i get the F temp , but what about the resistance ?

BTW , time for a M3 bulge hood ? (or maby that wont do ya anything good either)
the values in the file are temperatures. 0-1024 is assumed and that's 10 bit adc conversion coming straight off the NTC coupling with stock ecu present (and providing the bias resistor, whatever it is)

the bulge in the hood is fine for now.

i managed to piss the stock ecu off somehow even worse, i lost RPM signal when i was out and about, which shuts off the fuel pump, and unfortunately also shuts off the front fan, no matter how freaking hot the water temp says it is. i am VERY Disappointed in BMW programmers in this regard, it saw temperatures over 240F, and finished cracking my expansion tank, riiiiight around harlem, in manhattan. this basically made the car dump out all its coolant, overheating like a massive *****.

no damage though, i replaced the expansion tank in the parking lot, which was surprisingly easy to do, filled it back up, jumpered the negative terminal of the front fan to negative to get the car home.

i've been too lazy to hook up one of my readers to see what it's actually complaining about, but the standalone still works and can read the RPM perfectly fine.

i'm really wanting to swap to manual trans now, so i need to start looking for one of those and a way to get it into my garage.

car runs like a champ when it's not overheatnig, that's for sure, front fan at full blast keeps the temps at 196, that's also probably without the "performance mode" engaged on the main thermostat.

i'm going to hook the stock fuel pump relay to the standalone box, and hook up another relay for the fan. i will replace the crank angle sensor cause i ordered one.

other than that, i've been driving the car at around 7psi without an issue from the engine, other than the bit mentioned above.

any other questions ?
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Old 10-30-2011, 07:58 PM   #239
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100 + shipping for a 5spd. You will still need pedal, flywheel,clutch etc.
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Old 10-31-2011, 09:45 AM   #240
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100 + shipping for a 5spd. You will still need pedal, flywheel,clutch etc.
could you please find out shipping to 07728 ? i'd totally jump on that, gather up parts and swap the damn thing. i'm sick of dealing with buggy as hell auto trans control software.
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