M275 V12 Bi-Turbo Platform Technical discussion relating to models sharing the M275 V12 Bi-Turbo (V12 TT). Including SL600, SL65 AMG, CL600, CL65 AMG, S600, S65 AMG.
Sponsored by:
Sponsored by:

Turbo bypass valves on the (relative) cheap

Thread Tools
 
Search this Thread
 
Rate Thread
 
Old 02-19-2022, 12:24 AM
  #1  
Senior Member
Thread Starter
 
feets's Avatar
 
Join Date: Feb 2014
Location: DFW
Posts: 251
Likes: 0
Received 40 Likes on 26 Posts
2006 C55
Turbo bypass valves on the (relative) cheap

I'm planning on doing a tune on my 2013 CL65. Knowing that stock bypass valves are not likely to give me proper control over boost I wanted to upgrade.

Weistec slaps their AMG tax on their parts and dings you $700 for their super deluxe whooshing BOVs that make your car sound like the fart piped turbo Honda.

I prefer a more mature stock sounding units.

Turbosmart has the answer either way. I picked up these internal bypass valves for less than half the Weistec price.


The following users liked this post:
JJKCMO (02-22-2022)
Old 02-20-2022, 11:39 AM
  #2  
Senior Member
 
brucewane's Avatar
 
Join Date: Dec 2019
Location: Houston, TX
Posts: 342
Received 103 Likes on 81 Posts
2005 SL600
Great find, thanks for the tip!
Old 03-15-2022, 12:27 PM
  #3  
Member
 
Hank Houston's Avatar
 
Join Date: Dec 2021
Location: Nyc
Posts: 78
Received 13 Likes on 12 Posts
S-600 w220, Nissan s13 coupe, and Nissan s13 convertible
But thats a blow off valve and has no control of your boost whatsoever. What your looking for is the wastegate buddy
Old 03-15-2022, 01:23 PM
  #4  
Senior Member
Thread Starter
 
feets's Avatar
 
Join Date: Feb 2014
Location: DFW
Posts: 251
Likes: 0
Received 40 Likes on 26 Posts
2006 C55
Originally Posted by Hank Houston
But thats a blow off valve and has no control of your boost whatsoever. What your looking for is the wastegate buddy
Not entirely true.
Wastegates control the boost. Bypass valves allow it to bypass when you let off the throttle. When they start to leak you lose boost pressure.

My car is 9 years old with 115k miles. I replaced them while the engine was out for turbo coolant seals.
Old 03-19-2022, 01:16 PM
  #5  
Member
 
Hank Houston's Avatar
 
Join Date: Dec 2021
Location: Nyc
Posts: 78
Received 13 Likes on 12 Posts
S-600 w220, Nissan s13 coupe, and Nissan s13 convertible
Valid point, I've just never heard of a bov failing like that before. You did mention control of your boost and not maintaining boost, hence it's the wastegate your looking for. I been thinking about disconnecting my wastegates and just running full boost. Should be fun, I'll let you know when I try it
Old 05-26-2024, 05:10 PM
  #6  
Member
 
Hank Houston's Avatar
 
Join Date: Dec 2021
Location: Nyc
Posts: 78
Received 13 Likes on 12 Posts
S-600 w220, Nissan s13 coupe, and Nissan s13 convertible
Just an update. I installed a manual boost controller and boy oh boy is the car fast. Too bad now I'm chasing misfiring problems with my 2006 s600. It's a love/hate thing with the v12. Love it when it's running right but hate it when it starts misfiring. Even though the misfiring is due to maintenence but it's pretty expensive to remedy. I wonder if the diaphram inside my wastegate is still in good condition. The car pulls hard but since I don't have a boost gauge installed, I don't know how well the boost is holding.
Old 06-23-2024, 12:13 PM
  #7  
MBWorld Fanatic!
 
JohnLane's Avatar
 
Join Date: Feb 2012
Location: Phoenix
Posts: 1,423
Received 523 Likes on 390 Posts
222 S-65
OP did the blow off valves solve a problem?

Hank you need to contact the fellow in California who makes up a voltage transformer with fuses and improved components as well as coil packs that will live.
Old 06-23-2024, 12:45 PM
  #8  
Senior Member
 
brucewane's Avatar
 
Join Date: Dec 2019
Location: Houston, TX
Posts: 342
Received 103 Likes on 81 Posts
2005 SL600
Originally Posted by JohnLane
OP did the blow off valves solve a problem?

Hank you need to contact the fellow in California who makes up a voltage transformer with fuses and improved components as well as coil packs that will live.
The website is v12icpack.com.
Old 06-24-2024, 08:00 AM
  #9  
Senior Member
Thread Starter
 
feets's Avatar
 
Join Date: Feb 2014
Location: DFW
Posts: 251
Likes: 0
Received 40 Likes on 26 Posts
2006 C55
Originally Posted by JohnLane
OP did the blow off valves solve a problem?

Hank you need to contact the fellow in California who makes up a voltage transformer with fuses and improved components as well as coil packs that will live.
I had no problems. They were replaced preemptively. We had the motor down to do the turbo coolant o-rings so it was an easy swap.
Old 07-06-2024, 01:30 PM
  #10  
Member
 
Hank Houston's Avatar
 
Join Date: Dec 2021
Location: Nyc
Posts: 78
Received 13 Likes on 12 Posts
S-600 w220, Nissan s13 coupe, and Nissan s13 convertible
Brucewayne I have been in contact with Clark for the last couple of months. I bought his boost box and sent him both my coilpacks for repair. Before I sent it to him driverside bank was misfiring. When I got it back passenger side bank was misfiring. I bought a voltage transformer from fcp euro and it was still misfiring. Put the boost box back in and found that 2 of the leds didn't come on because of blown fuse. Replacing the fuse didn't help. I sent the boost box and passenger side coilpack back to Clark. Clark said the,coilpack had no issues. So hopefully the new boost box he sends me will fix the problem
Old 07-26-2024, 09:29 PM
  #11  
MBWorld Fanatic!
 
JohnLane's Avatar
 
Join Date: Feb 2012
Location: Phoenix
Posts: 1,423
Received 523 Likes on 390 Posts
222 S-65
Originally Posted by Hank Houston
Brucewayne I have been in contact with Clark for the last couple of months. I bought his boost box and sent him both my coilpacks for repair. Before I sent it to him driverside bank was misfiring. When I got it back passenger side bank was misfiring. I bought a voltage transformer from fcp euro and it was still misfiring. Put the boost box back in and found that 2 of the leds didn't come on because of blown fuse. Replacing the fuse didn't help. I sent the boost box and passenger side coilpack back to Clark. Clark said the,coilpack had no issues. So hopefully the new boost box he sends me will fix the problem


Any updates?
Old 07-26-2024, 11:29 PM
  #12  
Member
 
Hank Houston's Avatar
 
Join Date: Dec 2021
Location: Nyc
Posts: 78
Received 13 Likes on 12 Posts
S-600 w220, Nissan s13 coupe, and Nissan s13 convertible
I sent the coilpack and boost box back to Clark. He checked the coilpack and said nothing was wrong with it. He sent it back to me with another boost box. I put the car back together. There's no codes, but the engine idles rough. The boost box's blue led is blinking, clark thought it might be a blown fuse, but i changed the fuse with a new one, and it's still blinking. Clark told me to send the boost box back to him. I seem to have terrible luck with the voltage transformer. I also ordered a voltage transformer from fcpeuro.com, and it threw a bunch of codes. I haven't been able to take the car for a drive since a tire decided to blow out from the sidewall. The new rims and tires I got were supposed to get mounted today, but it turns out I ordered 3 front rims by accident. Also, the old lugs are too long for the new rims, so I gotta order lugs along with a rear rim. I need to get some wheels on the car so I can get it back to my parking spot, then send the boost box back to Clark. Honestly, I'm tired of the ignition system in the m275 platform. I am seriously considering getting a stand-alone ecu or trying to install individual coilpack. The problem is figuring out what wire is the signal for which plug. I wish there was more info online for pinouts of the plugs. I mean, it can't be that hard, right? Coilpacks have 3 wires a positive, a negative, and a signal. Positive and negative can hook up to the battery, but figuring out the signal is the hard part. If anyone has any ideas, please let me know

Last edited by Hank Houston; 07-26-2024 at 11:31 PM.
Old 07-28-2024, 12:43 PM
  #13  
MBWorld Fanatic!
 
JohnLane's Avatar
 
Join Date: Feb 2012
Location: Phoenix
Posts: 1,423
Received 523 Likes on 390 Posts
222 S-65
279 powered cars have individual coils for each cylinder. My 2015 has needed one coil replaced in 135,000 miles. Much less drama than the 221 car that had new coil packs and voltage transformer when I purchased it. I replaced a coil pack while I owned it. It needed another and no doubt a VT when I traded it for the 222 car.
Old Yesterday, 08:58 PM
  #14  
Member
 
Hank Houston's Avatar
 
Join Date: Dec 2021
Location: Nyc
Posts: 78
Received 13 Likes on 12 Posts
S-600 w220, Nissan s13 coupe, and Nissan s13 convertible
I've been curious about the m279 coils. It comes in a set, 2 coils per pack right? Does it still use the voltage transformer or did the do away with it and built it into thr coilpack like everyone else? I wonder what would be necessary to convert the m275 to the m279 coilpacks. I seriously want to convert to any coilpack other than mercedes, honda or ls coilpacks idc. Never have I had a car give me so much problems over spark. I've been dealing with this misfire issue for over a year now. I've bought 6 voltage transformers and all 6 were faulty. The shipping to send the coilpacks to Clark and back cost me over $400. I gotta send the boost box back to him to get checked out because it's faulty too. The amount of money I've thrown into the coilpacks and voltage transformer I think I could have bought a stand alone ecu and wired in some individual coilpacks. It scares me that I'll have to deal with this problem again in 20,000-50,000 miles. I absolutely love the v12 but goddamn does it come with a load of headaches. One thing I'm happy about is I redid the vacuum lines and bypassed all the electronic bull****. No more Limp home mode! Screw that I should be able to tell my.car when I want it to die or to take it easy and now I can hehehe
Old Yesterday, 09:03 PM
  #15  
Member
 
Hank Houston's Avatar
 
Join Date: Dec 2021
Location: Nyc
Posts: 78
Received 13 Likes on 12 Posts
S-600 w220, Nissan s13 coupe, and Nissan s13 convertible
Hey Op, did you ever install those blow off valves? Are they direct replacements or did you have to disable the factory units and install the boy's somewhere else? I have been thinking about welding a pair of bov's to the intercoolers and blocking off the factory ones. But if the ones you bought bolt right up to the factory location, that would save me some time and money

Currently Active Users Viewing This Thread: 2 (1 members and 1 guests)


You have already rated this thread Rating: Thread Rating: 0 votes,  average.

Quick Reply: Turbo bypass valves on the (relative) cheap



All times are GMT -4. The time now is 12:09 PM.