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Forced Induction Forum Sponsored by Active Autowerke
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Old 02-13-2013, 10:40 AM   #81
PEI330Ci
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BOV can be placed a variety of places to alter the performance of the setup. Closest to the turbo is best for the turbo because it's instantly venting any pressure from coming back at the turbo causing compressor surge. Close to the turbo also creates the most lag as it is completely venting any positive pressure from the source and will cause the most lag between shifts. Primarily as it has to completely "refill" the desired boost before the pull starts again in the next gear. Moving the BOV away from the turbo lessens the amount of lag because it is keeping some positive pressure on the turbo side of the system. Most of the time I go for where works best with what's going on with that particular setup. I chose the location on this car for ease of fitment, clearance with fog lights, lack of clearance on the hot side because of turbo placement, and also far enough away from the blow through MAF that will be in the straight piece of pipe directly before the throttle body.
Really good info, thanks for explaining the application.

In the motorsports environment they can control the BOV very similar to how the waste-gate is controlled, and have off-throttle closed loop control of the charge pipe pressure. Basically, they target XX PSI off throttle, in addition to using a bypass valve or through-engine flow control to keep the turbine wheel spinning at target speed.

A street application is totally different, and I can understand how moving the BOV further away from the compressor can be beneficial for throttle response.

Very nice work!
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Old 02-13-2013, 08:23 PM   #82
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Tial uses a pretty large vac line compared to what's really needed. I've put Tial valves all over the place all with different length vac lines and none have ever shown any delayed response. The one on my car is probably the longest/furthest I have done and still no issues



I put the BOV where it is just for best fitment, no other reason.





BOV can be placed a variety of places to alter the performance of the setup. Closest to the turbo is best for the turbo because it's instantly venting any pressure from coming back at the turbo causing compressor surge. Close to the turbo also creates the most lag as it is completely venting any positive pressure from the source and will cause the most lag between shifts. Primarily as it has to completely "refill" the desired boost before the pull starts again in the next gear. Moving the BOV away from the turbo lessens the amount of lag because it is keeping some positive pressure on the turbo side of the system. Most of the time I go for where works best with what's going on with that particular setup. I chose the location on this car for ease of fitment, clearance with fog lights, lack of clearance on the hot side because of turbo placement, and also far enough away from the blow through MAF that will be in the straight piece of pipe directly before the throttle body.
I knew you could turn metal into artwork but your knowledge of everything is impressive
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Old 02-14-2013, 08:03 AM   #83
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I knew you could turn metal into artwork but your knowledge of everything is impressive
All stuff I've learned just from experiencing it
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Old 02-19-2013, 03:37 PM   #84
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Well, it's nearing the end for this build, most things are buttoned up with just a few items remaining. Just ordered all AN fittings and hose for oil/coolant lines now that all hardware is placed. Waiting on a few interior/console pieces to arrive (customer requested all peeling interior parts be replaced), M-tech II bumper fitted however waiting on a few OEM mounting brackets that differed from the original 325 bumper. Lastly waiting on a tune and blow through MAF and we should be seeing what this project has in store!

Nipples? Bungs? Lots of them



AEM wideband for mirror display



Lots of wires, OEM and aftermarket but as clean as it gets!



AC lines, boost control solenoid, and vac lines ran



Active Autowerke fan clutch



Completed engine bay







Purty!



HPF who?



Enjoy!

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Old 02-19-2013, 05:49 PM   #85
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Original Trasmission Control Unit? No Chance to get this one working without CAN-H/CAN-L ! And you're unable to obtain a correct load-signal without using the MAF-Sensor. The Transmission will go into limp mode and write into the failure-memory: "FEHLER 08 - LASTSIGNAL"

And if it's working (what i didn't think, Sorry...) you will ruin your Level10 Tranny, becouse of wrong pressure apply to fwd clutch and tcc...
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Old 02-19-2013, 07:21 PM   #86
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Original Trasmission Control Unit? No Chance to get this one working without CAN-H/CAN-L ! And you're unable to obtain a correct load-signal without using the MAF-Sensor. The Transmission will go into limp mode and write into the failure-memory: "FEHLER 08 - LASTSIGNAL"

And if it's working (what i didn't think, Sorry...) you will ruin your Level10 Tranny, becouse of wrong pressure apply to fwd clutch and tcc...
Uh, relax and maybe read the thread? There will be a blow through MAF sensor, I even commented just at the top of this post that it wasn't installed yet and regardless if there wasn't, the person tuning this car knows what's up for this type of setup more than pretty much anyone on the face of the planet.
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Old 02-19-2013, 08:04 PM   #87
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Lookin good man lookin good!
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Old 02-19-2013, 10:41 PM   #88
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holy sleeper!
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Old 02-19-2013, 10:58 PM   #89
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yes, Yes, YESSS!!!!

Can't wait for Video's of this car running!

any chance this project will make it out to MFest VII ??
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Old 02-19-2013, 11:18 PM   #90
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Yes who's HPF car...sexy color that's for sure!
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Old 02-20-2013, 01:37 PM   #91
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this thread just continues to deliver can't wait for the vids!!
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Old 02-20-2013, 01:50 PM   #92
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Yeah, this is gonna turn out to sick.. Can't wait!
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Old 02-20-2013, 02:35 PM   #93
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holy sleeper!
Indeed! Just what the customer wants!

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Originally Posted by lrinco01 View Post
yes, Yes, YESSS!!!!

Can't wait for Video's of this car running!

any chance this project will make it out to MFest VII ??
Video's as soon as it's going, should be visiting the east coast very soon for dyno tuning! Most definitely not going to Mfest, this car will be seen daily around the streets of Tampa and that's about it. The owner is not a boost junky or even a performance BMW junky, he just loves his 325 that he bought brand new from the showroom years ago and wants more power. After visiting another shop here in Tampa and being taken for a ride for a 1.5yr 205whp $18k build, he realized his loss, tossed the old setup and looked to us to build him what he was hoping for the first time around. Very few people will spend 18k on a turbo/motor setup in the first place, let alone spend it once, remove it at almost a complete loss, and then be ready to start over again just visiting our shop and speaking with us for the first time. Tony is a stand up customer most definitely deserving of this setup and I am extremely proud that he believed in me and our shop to build it for him, never with a bad attitude towards the car or questioning a budget considerably higher than his first go around. I only hope he loves the car and the way it turned out as much as I do, it's definitely taken him for a ride in the past, and hopefully a much better ride in the future!

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this thread just continues to deliver can't wait for the vids!!
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Yeah, this is gonna turn out to sick.. Can't wait!
Thanks guys! Very soon!!!

-Shawn-
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Old 02-20-2013, 04:14 PM   #94
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Exhaust done, wheels mounted, hotside charge pipe complete


















Dayum! Shawn always delivering the goods!





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Old 02-20-2013, 06:14 PM   #95
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Lookin good man lookin good!
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Old 02-21-2013, 10:51 AM   #96
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Looking good boss
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Old 02-21-2013, 11:55 AM   #97
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Dayum! Shawn always delivering the goods!
Marcus, when you gonna let me build something for you??

ECU shipped to Nick G. of Technique Tuning today, another perfectly tuned DME coming soon to this car!

And a few more pictures







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Old 02-21-2013, 02:04 PM   #98
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love it and for Nick G's tuning I'm very pleased man with his magic on my car
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Old 02-21-2013, 02:06 PM   #99
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love it and for Nick G's tuning I'm very pleased man with his magic on my car
Nick tuned my M-Roadster a few years ago, when it comes to stock DME tuning on certain platforms not many compare to him!
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Old 02-21-2013, 08:17 PM   #100
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Nick tuned my M-Roadster a few years ago, when it comes to stock DME tuning on certain platforms not many compare to him!
Amen!!!
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