Bov and meth

jbertino · 06-09-2012, 01:06 AM

Is it true that I can't run a bov if I plan on getting meth because it will spray meth into the engine bay when it releases boost

jbertino · 06-09-2012, 11:00 AM

Anyone have info ?

rader1 · 06-09-2012, 11:04 AM

It does discharge a spray when it blows off, however my tuner assures me its perfectly safe at a 50/50 or weaker mix.

jbertino · 06-09-2012, 04:05 PM

Anymore info?

benzy89 · 06-09-2012, 04:14 PM

If you're using a very aggressive mix of meth, you mite have a reason to be concerned. But even w/ a BOV, any meth that escapes is a negligible amount -- the BOV will only open in between shifts, so if you're WOT the BOV shouldn't be open very long.

cn555ic · 06-09-2012, 04:19 PM

I just feel a bov and meth do not work together and not smart.

Lulz_M3 · 06-09-2012, 04:22 PM

Lol maybe it's a good thing the 335 is prone to not blowing off during shifts.

335iJWC · 06-10-2012, 02:23 AM

Meth ignites alot easer when sprayed than in liquid form, even if the probability is minimal, you are increasing your risk.

benzy89 · 06-10-2012, 12:27 PM

Any flammable substance is more dangerous as an aerosol than as a liquid. If a BOV did release some meth into the engine bay, it would be dispersed so quickly b/c of all the turbulence in the engine bay.

If you do want the SAFEST option, you are better off using Diverter Valves that will not release any meth into the atmosphere/engine bay.

Dr. G · 06-10-2012, 03:03 PM

Wouldn't re-circulating meth also be an issue?
I'm guessing it's too tiny of an amount of meth to worry about?

benzy89 · 06-10-2012, 03:16 PM

The meth would be recirculated back into the intake tract, which is why some meth users experience less carbon build up in their intake valves.

rader1 · 06-10-2012, 04:04 PM

Quote:

Originally Posted by Dr. G

Wouldn't re-circulating meth also be an issue?
I'm guessing it's too tiny of an amount of meth to worry about?

It may actually help by dropping pre turbo IATs a tiny bit.

Dr. G · 06-10-2012, 05:02 PM

Quote:

Originally Posted by rader1

It may actually help by dropping pre turbo IATs a tiny bit.

Ehhh, I'm not a fan of injecting pre-turbo and this seems to end up with a similar effect although it's probably a negligible amount.

alnk1015 · 06-10-2012, 11:52 PM

Quote:

Originally Posted by benzy89

The meth would be recirculated back into the intake tract, which is why some meth users experience less carbon build up in their intake valves.

Um...all meth are injected through the valves. WTF are you running?

benzy89 · 06-11-2012, 08:44 AM

Quote:

Originally Posted by alnk1015

Um...all meth are injected through the valves. WTF are you running?

Meth bungs are located towards the end FMIC of the charge pipe. The airflow pathway starts at the FMIC, up into the CP, where meth is added. As the air continues to travel through the CP, it will first pass the DV/BOV ports & then finally enter the engine through the throttle body. When it finally enters the engine, it will then be run through the intake valves & finally blended w/ fuel in the pistons.

All meth injected into the CP during WOT will reach the intake valves, but we were discussing the potential for a fire if meth was released by a BOV into the engine bay. B/c a BOV vents directly into the atmosphere (more specifically the engine bay), if you are running an aggressive meth blend (greater than 70%), there is a potential for fire. With a 50:50 mix, there is close to zero concern. The power gains between a 50:50 mix & 75:25 mix are minimal, but the potential for a fire igniting is drastically different.

Lulz_M3 · 06-11-2012, 08:55 AM

You could always relocate the BOV, ive thought about changing my BOV location to the hot pipe just before the intercooler, or mounting it to the intercooler itself. Full Race often mounts their BOV directly on the intercooler(hot side) with the theory that its better to vent the hot air than the air that has already been cooled by the intercooler.

benzy89 · 06-11-2012, 08:58 AM

Great in theory, sounds like a bitch for fabricating

Lulz_M3 · 06-11-2012, 09:02 AM

Quote:

Originally Posted by benzy89

Great in theory, sounds like a bitch for fabricating

Find a spot on your piping, mark it, head to your local speedshop to weld a new bung on. Depending on your BOV, either make a block off plate (easy for the greddy style) or have them cut the flange off and weld a piece of alumnium over it. Run a new vacuum line down to wherever you mounted the BOV and your done. Sounds like an average enthusiasts saturday if you ask me.

benzy89 · 06-11-2012, 09:04 AM

Tru.... I'm happy w/ my Forge DVs & meth-less car, so whatever floats your boat.

06-09-2012, 01:06 AM	#1
jbertino Lieutenant 34 Rep 513 Posts Drives: 2010 135i 6mt fbo protune e30 Join Date: Apr 2012 Location: nj iTrader: (1)	Bov and meth Is it true that I can't run a bov if I plan on getting meth because it will spray meth into the engine bay when it releases boost __________________ full bolt on 6mt cobb e30 protune fortune auto coilovers 12.08 119
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06-09-2012, 11:00 AM	#2
jbertino Lieutenant 34 Rep 513 Posts Drives: 2010 135i 6mt fbo protune e30 Join Date: Apr 2012 Location: nj iTrader: (1)	Anyone have info ? __________________ full bolt on 6mt cobb e30 protune fortune auto coilovers 12.08 119
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06-09-2012, 11:04 AM	#3
rader1 Banned 70 Rep 2,197 Posts Drives: Cobb Stage 2+ 135i Join Date: Apr 2011 Location: Roanoke, VA iTrader: (0)	It does discharge a spray when it blows off, however my tuner assures me its perfectly safe at a 50/50 or weaker mix.
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06-09-2012, 04:05 PM	#4
jbertino Lieutenant 34 Rep 513 Posts Drives: 2010 135i 6mt fbo protune e30 Join Date: Apr 2012 Location: nj iTrader: (1)	Anymore info? __________________ full bolt on 6mt cobb e30 protune fortune auto coilovers 12.08 119
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06-09-2012, 04:14 PM	#5
benzy89 Banned 79 Rep 2,396 Posts Drives: '08 E90 335i Join Date: Jan 2012 Location: Northern NJ iTrader: (3) Garage List 2008 BMW 335i [7.50]	If you're using a very aggressive mix of meth, you mite have a reason to be concerned. But even w/ a BOV, any meth that escapes is a negligible amount -- the BOV will only open in between shifts, so if you're WOT the BOV shouldn't be open very long.
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06-09-2012, 04:19 PM	#6
cn555ic 441 Rep 18,331 Posts Drives: 335i Join Date: Jun 2007 Location: US iTrader: (6)	I just feel a bov and meth do not work together and not smart.
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06-09-2012, 04:22 PM	#7
Lulz_M3 Banned 33 Rep 1,029 Posts Drives: AW 335i 6MT Join Date: Oct 2011 Location: Jax, Fl iTrader: (0)	Lol maybe it's a good thing the 335 is prone to not blowing off during shifts.
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06-10-2012, 02:23 AM	#8
335iJWC ~~~ 24 Rep 592 Posts Drives: JB 335i-M3 Join Date: Feb 2010 Location: Simi Valley iTrader: (4) Garage List 2008 BMW 335i [9.00]	Meth ignites alot easer when sprayed than in liquid form, even if the probability is minimal, you are increasing your risk. __________________ . ................
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06-10-2012, 12:27 PM	#9
benzy89 Banned 79 Rep 2,396 Posts Drives: '08 E90 335i Join Date: Jan 2012 Location: Northern NJ iTrader: (3) Garage List 2008 BMW 335i [7.50]	Any flammable substance is more dangerous as an aerosol than as a liquid. If a BOV did release some meth into the engine bay, it would be dispersed so quickly b/c of all the turbulence in the engine bay. If you do want the SAFEST option, you are better off using Diverter Valves that will not release any meth into the atmosphere/engine bay.
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06-10-2012, 03:03 PM	#10
Dr. G Major General 278 Rep 5,062 Posts Drives: Black e92 335i Join Date: Apr 2010 Location: Brampton, Ontario iTrader: (32) Garage List e92 BMW 335i [8.84]	Wouldn't re-circulating meth also be an issue? I'm guessing it's too tiny of an amount of meth to worry about? __________________ JB4 / OSS Angel Eyes / Downpipes / F1-Racewerks FMIC / Custom Meth Kit / BMS DCI / ER Chargepipe / HKS BOV / BMS Meth Elbow / BMW Performance Exhaust / Carbon Fiber Inlay Quad Tips / 19" Miro 111 / Front Aero Lip / M3 Sides / VRS CSL Trunk / Mtech Rear / DD CF Quad Finned Diffuser / LCI Tails / BBK / Smoked Reflectors / F1 Euphoria LED Interior / License LED's / GT 5000k Corners / 5000k HID Fogs / Air Scoops / LED Turn Signals / FK Silverline Coilovers / HPA endlinks / Vibrant Resonators / Osram CBI 5000k D1S
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06-10-2012, 03:16 PM	#11
benzy89 Banned 79 Rep 2,396 Posts Drives: '08 E90 335i Join Date: Jan 2012 Location: Northern NJ iTrader: (3) Garage List 2008 BMW 335i [7.50]	The meth would be recirculated back into the intake tract, which is why some meth users experience less carbon build up in their intake valves.
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06-11-2012, 08:55 AM	#16
Lulz_M3 Banned 33 Rep 1,029 Posts Drives: AW 335i 6MT Join Date: Oct 2011 Location: Jax, Fl iTrader: (0)	You could always relocate the BOV, ive thought about changing my BOV location to the hot pipe just before the intercooler, or mounting it to the intercooler itself. Full Race often mounts their BOV directly on the intercooler(hot side) with the theory that its better to vent the hot air than the air that has already been cooled by the intercooler.
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06-11-2012, 08:58 AM	#17
benzy89 Banned 79 Rep 2,396 Posts Drives: '08 E90 335i Join Date: Jan 2012 Location: Northern NJ iTrader: (3) Garage List 2008 BMW 335i [7.50]	Great in theory, sounds like a bitch for fabricating
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06-11-2012, 09:04 AM	#19
benzy89 Banned 79 Rep 2,396 Posts Drives: '08 E90 335i Join Date: Jan 2012 Location: Northern NJ iTrader: (3) Garage List 2008 BMW 335i [7.50]	Tru.... I'm happy w/ my Forge DVs & meth-less car, so whatever floats your boat.
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