Drivetrain Burger Motorsports (BMS) Tune(s)
2nd Gear
Joined: Jan 2013
Posts: 119
Likes: 2
I'm hoping the best for you!!!
As title says. Stock run was done about a month ago. Juice Box (12 o'clock setting) run a week ago. These are just the best runs done w/ my friends very stock '13 MCS. Times are limited by the run flat tires (lots of tire spin w/ JB+). 91oct gas. These times are similar to times posted by Terry earlier in these threads. Best runs shown where duplicated on other runs and all runs where done in exactly the same place. Bigger tires will give better results I'm sure. I am definitely going to get a JB+ for my car somewhere in the near future. Please post your time/jpeg to compare. It sure would be nice to get a time for MarioKarts GP! (By the way, don't do time tests w/ a passenger, only driver weight for time tests. Extra weight is a killer to the clock.) 
Stock 6.58
w/ Juice Box 6.27
Stock 6.58
w/ Juice Box 6.27
4th Gear
Joined: Jul 2013
Posts: 314
Likes: 0
From: Raleigh, NC
Nope, no intake. It just makes that sound that I've heard is the turbo turning backwards. I had it happen at low speeds in 4th or 5th gear kinda lugging it. I gave it 100% throttle and then let off and heard that noise. It never did it until I turned up the JB+.
4th Gear
Joined: Jun 2013
Posts: 402
Likes: 0
From: KC, MO
I would be concerned your diverter valve isn't functioning properly. If you don't vent the boost when you slam the throttle closed, the pressure wave flows backwards and tries to stop/reverse the compressor. The turbo is spinning at 100k rpm or so on a thin film of oil for a 'bearing'. Hitting it with a shock of air going the wrong way is not a good thing. I'll see if I can find some vids to compare the sound to for ya. Do you have a way of measuring boost pressure? Do you get a big spike when lifting?
http://www.turbobygarrett.com/turbob...mpressor_surge
Does it sound like these?
http://m.youtube.com/results?q=compressor+surge&sm=3
http://www.turbobygarrett.com/turbob...mpressor_surge
Does it sound like these?
http://m.youtube.com/results?q=compressor+surge&sm=3
Last edited by nine5raptor; Jan 1, 2014 at 08:29 AM.
4th Gear
Joined: Jul 2013
Posts: 314
Likes: 0
From: Raleigh, NC
I would be concerned your diverter valve isn't functioning properly. If you don't vent the boost when you slam the throttle closed, the pressure wave flows backwards and tries to stop/reverse the compressor. The turbo is spinning at 100k rpm or so on a thin film of oil for a 'bearing'. Hitting it with a shock of air going the wrong way is not a good thing. I'll see if I can find some vids to compare the sound to for ya. Do you have a way of measuring boost pressure? Do you get a big spike when lifting?
4th Gear
Joined: Jun 2013
Posts: 402
Likes: 0
From: KC, MO
You are putting it in a high boost, low flow situation. Not ideal for sure. I haven't seen a compressor map for our turbo. May need to search for one and take a look at the situation you are putting it in.
4th Gear
Joined: Jul 2013
Posts: 314
Likes: 0
From: Raleigh, NC
It just never did that before. Thought it was strange for it to start all of a sudden. I'll turn the little dial back a hair and see what the result is. I'm too worried about ruining the engine too with the dial at 3 o'clock permanently. I'm running a 30 percent mix of ethanol but I'm still worried it could cause problems.
5th Gear
Joined: Jul 2011
Posts: 1,025
Likes: 2
From: Los Angeles
I was told frankenturbo has a compressor map of a JCW and an 'S' on their website.
I was assuming possibly an intake and BOV were giving you that sound....sounds like a chirp more then a 'psssh' sound, not the case here.
But a bad diverter valve is not good, but easily replaceable.
I was assuming possibly an intake and BOV were giving you that sound....sounds like a chirp more then a 'psssh' sound, not the case here.
But a bad diverter valve is not good, but easily replaceable.
4th Gear
Joined: Jul 2013
Posts: 314
Likes: 0
From: Raleigh, NC
I was told frankenturbo has a compressor map of a JCW and an 'S' on their website. I was assuming possibly an intake and BOV were giving you that sound....sounds like a chirp more then a 'psssh' sound, not the case here. But a bad diverter valve is not good, but easily replaceable.
4th Gear
Joined: Jun 2013
Posts: 402
Likes: 0
From: KC, MO
Here is what I could find.... If you look at the map, the surge line is up the left side. If you go into the zone on the left (high boost, low flow), you get compressor surge but that would happen when flowing. If you get a squeak/bang that is a sharp sound when you lift, it could be a faulty diverter valve. They are relatively cheap if you suspect it.
Could also be something else entirely. Hard to diagnose over a forum.
Could also be something else entirely. Hard to diagnose over a forum.
4th Gear
Joined: Jun 2013
Posts: 402
Likes: 0
From: KC, MO
4th Gear
Joined: Jul 2013
Posts: 314
Likes: 0
From: Raleigh, NC
Here is what I could find.... If you look at the map, the surge line is up the left side. If you go into the zone on the left (high boost, low flow), you get compressor surge but that would happen when flowing. If you get a squeak/bang that is a sharp sound when you lift, it could be a faulty diverter valve. They are relatively cheap if you suspect it. Could also be something else entirely. Hard to diagnose over a forum.
Why has everyone been so quiet?? Dumb question but how do you release the clips on the JB? I have to go in for a P1339 code I get off and on and I need to remove the JB. Also have been running a 30% mix of e85. When I remove the JB is there anything wrong with still having this mix in the tank? I did not think so but figured I would ask.
Former Vendor
Joined: Sep 2007
Posts: 519
Likes: 3
From: terry@burgertuning.com
I'm monitoring with a DashCommand and OBD2 reader. I'll have to check and see if I see any spikes when lifting. It seemed to only do it at low RPM, high throttle situations. I'm going to cut the JB back some and see what happens. If the diverter valve is bad on this car, it will only add to the other 700 problems it's had.
Former Vendor
Joined: Sep 2007
Posts: 519
Likes: 3
From: terry@burgertuning.com
Why has everyone been so quiet?? Dumb question but how do you release the clips on the JB? I have to go in for a P1339 code I get off and on and I need to remove the JB. Also have been running a 30% mix of e85. When I remove the JB is there anything wrong with still having this mix in the tank? I did not think so but figured I would ask.
I don't think the E mixture will be an issue for that camshaft sensor code.
Why has everyone been so quiet?? Dumb question but how do you release the clips on the JB? I have to go in for a P1339 code I get off and on and I need to remove the JB. Also have been running a 30% mix of e85. When I remove the JB is there anything wrong with still having this mix in the tank? I did not think so but figured I would ask.
The clip I am struggling with the the one from the JB that goes into the MAF. It has a small grey piece on the black connector.
Sorry I did not think the e85 or JB was causing the p1339 code. I was asking if when I take out the JB is it ok to still have e85 in the tank?
Former Vendor
Joined: Sep 2007
Posts: 519
Likes: 3
From: terry@burgertuning.com
Right, I meant I don't think the ethanol will prevent the dealer from repairing that sensor or raise any eyebrows.
3rd Gear
Joined: Aug 2013
Posts: 207
Likes: 1
From: Long Island, NY
I see that a forge diverter valve comes with different springs for different levels of boost.
Reading most of this thread, many are using the JB+ with stock diverter valve.
Should the stock diverter valve be replaced with an upgraded diverter valve with appropriate spring? Or maybe a new spring in stock valve rated for higher boost?
Reading most of this thread, many are using the JB+ with stock diverter valve.
Should the stock diverter valve be replaced with an upgraded diverter valve with appropriate spring? Or maybe a new spring in stock valve rated for higher boost?
1st Gear
Joined: Feb 2013
Posts: 42
Likes: 0
From: Central NJ
How does your forge diverter valve with the stiffer spring work for you? Are you reading higher levels of boost due to it? Or do you just notice a quicker release of pressure when shifting and letting off of the throttle? I have heard that the stock diverter valve tends to not release the pressure quick enough and could create compressor surge (compressor spinning backward) which is what it seems like some are having an issue with. Just curious if that is the only benefit or if it does in fact raise boost as well.