 » Site Navigation | | | | » Recent Threads | | | looove 04-16-2024 01:18 PM 04-16-2024 01:18 PM 0 Replies, 1,652 Views | |  |  |  | |  08-23-2005, 05:23 PM | #1 | | doesn't care about you. Join Date: Aug 2004 Location: Denver, CO Posts: 3,925 |  Anyone have experience with ApexI SAFC II?
http://www.vividracing.com/catalog/p...roducts_id/404 If I use this, it says it can compensate for open atmosphere blow-off valves!! Anyone know if this would work with our cars and the DASC? __________________ 
'99 Dinan M3 |  |  | | 08-25-2005, 03:44 AM | #2 | | Senior Member Join Date: Nov 2004 Location: Concord Posts: 326 |
bump...no info at all people???? __________________
1998 318TI
DASC•Custom Black Leather Interior w/ Silver Inserts•AC Schnizter:Pedals/Shift Knob/E-Brake Handle•Aluminum Gauge Faces•Alpine Speakers/Tweeters•Custom False Floor System•K&N Filter•Hi-Flow Z3/ti 97’•M3 Clutch•Lightweight Flywheel•Turner Motorsports SSK•H&R Race Springs•Racing Dynamics:Front Strut Brace/Sway Bar/Shocks/Bodykit/Rear Spoiler•Brembo Cross-Drilled Rotors•Supersprint Exhaust•19” Seducer Wheels•M3 Mirrors•Clear Corner Lights/Side Markers•Euro Taillights•DZUZ Fastened•3.73 LSD | | | | | 08-25-2005, 05:06 PM | #3 | | Senior Member Join Date: Mar 2005 Location: Portland Or Posts: 2,666 |
You don't need a blow off valve with a Supercharger. Its useless.
Dave __________________
Dave - PDX
1995 318ti - Active Black and Tan.
2005 330xi - Mtech 1 - 6spd - Orient Blue/Black | | | | | 08-25-2005, 05:40 PM | #4 | | doesn't care about you. Join Date: Aug 2004 Location: Denver, CO Posts: 3,925 |
Quote: | Originally Posted by pdxmotorhead You don't need a blow off valve with a Supercharger. Its useless.
Dave | I know...I was just saying this would be great to help tune the lean issues some of us are having with the DASC. Some people on the forum have turbo kits on their cars, and being able to run a vent to atmosphere bov would be nice. I've gone over (on the yahoo board) replacing the bypass valve on the DASC with a bov, but apparently they do different things. __________________
'99 Dinan M3 | | | | | 10-12-2005, 01:05 PM | #5 | | Member Join Date: Jan 2005 Location: Belgium Posts: 42 |
So what you're saying is that a BOV can not be used on a turbo-ed M42/M44 (like my Mosselman setup) ? And why not ? | | | | | 10-12-2005, 02:30 PM | #6 | | doesn't care about you. Join Date: Aug 2004 Location: Denver, CO Posts: 3,925 |
Quote: | Originally Posted by AzzKickr So what you're saying is that a BOV can not be used on a turbo-ed M42/M44 (like my Mosselman setup) ? And why not ? | Blow-off valve that vent to atmosphere are typically not used on cars with Mass Air Flow meters. When the BOV blows off, it releases air that was previously measured by the MAF meter. This usually means the car will stumble and run REALLY rich at idle or anytime the BOV releases air. Cars that respond well to BOVs (that vent to atmosphere) use MAP sensors instead of MAF sensors. The basic difference is this: A MAP sensor reads the PRESSURE of the intake tract, while a MAF measures the mass of the air as it comes in. A MAF system needs to stay sealed to work well. Some production turbo vehicles come with a sealed version of a BOV calles a bypass-valve. A bypasss-valve does the same thing as a BOV, only instead of blowing to atmosphere, it blows back into the intake tract, thus never losing any air that was measured by the MAF meter. The Apexi unit that I had mentioned is capable of montioring the intake pressure, probably via an add-on MAP sensor. It also probably piggybacks the MAF meter to change the sensor voltage. I had a turbo civic back in the day and I loved the BOV sound. But apparently you don't really need one unless you are running 10+ psi. If you do run one, I would try to vent it back into the intake tract, anywhere after the MAF meter. Good luck! __________________
'99 Dinan M3 | | | | | 10-13-2005, 02:37 PM | #7 | | Member Join Date: Jan 2005 Location: Belgium Posts: 42 |
Great explanation !
Thx !
Now I know how to solve this problem. Either putt a BOV on it and let it vent into the pipe again that connects the MAF and the turbo, or install a bypass valve or have a look at Apexi's solution.
Thx again ! | | | | | 10-14-2005, 02:14 PM | #8 | | Member Join Date: Jan 2005 Location: Belgium Posts: 42 |
I'm about to buy the Apexi SAFC-II. Well, at least in the nearby future. I plan on buying a decent BOV (Apexi, HKS,..) along with the SAFC-II and an adjustable fuel pressure regulator. Hope this will feed the engine enough to ensure good performance in conjunction with the turbo. | | | | | 10-14-2005, 09:03 PM | #9 | | Senior Member Join Date: Aug 2004 Location: Indiana Posts: 256 |
Wideband Oxygen sensor and a spilt second piggy back would be my choice. | | | | | 10-14-2005, 09:39 PM | #10 | | doesn't care about you. Join Date: Aug 2004 Location: Denver, CO Posts: 3,925 |
I agree. A wideband oxygen sensor is a must! I love mine, it makes me feel a lot better about running high rpms with full boost. I'm using the PLX Devices R500 which lets me monitor EGT, AFR, Knock, RPM, etc...Plus it is capable of datalogging with or without a laptop plugged in.
I think AzzKickr is looking for something to use so he can use a BOV to atmosphere. I'm not sure if the split second piggyback can do that. It would be nice to use something that completely eliminated the MAF sensor and replaces it with a MAP sensor. __________________
'99 Dinan M3 | | | | | 10-22-2005, 04:52 AM | #11 | | Senior Member Join Date: Aug 2004 Location: Indiana Posts: 256 |
To remove the MAF you would probably have to remove the coding in the PCM for the MAF so it would strictly rely on the MAP sensor.
I have heard alot of good things about Splt Second, I am not sure if you can run a BOV with a split second unit however they have alot of satisfied BMW customers.
I have a Digital Horse Power power programmer for my 3.4L Grand Am and I have the option to turn on and off the alot of parameters Maf being one of them. There is only one thing that I don't miss about my TI, and that is the aftermarket is just not there. I like playing with my cars and the TI just didn't cut it. | | | | | 10-22-2005, 05:47 AM | #12 | | Senior Member Join Date: Jan 2004 Location: MD/VA/DC Posts: 834 |
im pushing over 22psi and i dont have a basspass valve
i never did like the DASC setup | | | | | 10-24-2005, 04:23 PM | #13 | | doesn't care about you. Join Date: Aug 2004 Location: Denver, CO Posts: 3,925 |
Quote: | Originally Posted by mischief im pushing over 22psi and i dont have a basspass valve
i never did like the DASC setup | I'm not running 22psi, but at least mine fits under the hood!  That is what I like about the DASC setup. What else do you have done to your car that you can run so much boost?? __________________
'99 Dinan M3 | | | | | 10-25-2005, 05:16 AM | #14 | | Senior Member Join Date: Jan 2004 Location: MD/VA/DC Posts: 834 |
Quote: | Originally Posted by DustenT I'm not running 22psi, but at least mine fits under the hood! That is what I like about the DASC setup. What else do you have done to your car that you can run so much boost?? | Im not telling :P | | | | | 10-25-2005, 03:09 PM | #15 | | doesn't care about you. Join Date: Aug 2004 Location: Denver, CO Posts: 3,925 |
Quote: | Originally Posted by mischief Im not telling :P | Oh, come on now, don't be party pooper... From the looks of it, the SC unit is the same as the DASC, right? M62? I'm curious where you found a pulley that makes 22psi. I have been debating getting a smaller pulley and bumping my boost up to 12~14psi, but I didn't think it was safe. Do you have any internal work done? __________________
'99 Dinan M3 | | | | | |
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