09-29-2020, 03:02 PM | #1 |
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Boost dump
so my car is in the tuners getting a custom map, but mid to high rpm its dumping boost. The ecu is still requesting the boost target and the turbo is trying to hit the target. The car has been pressure tested and no leaks anywhere Obvious. my tuner said it sounds as if the dv+ is opening and dumping boost so he has ordered a turbosmart unit to try.
The problem seems to get worse as the engine gets hotter. Has anyone else experienced anything like this? Last edited by boldy1; 09-29-2020 at 03:53 PM.. |
09-29-2020, 03:07 PM | #2 | |
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Both the turbo smart and GFB diverter valves seem to have fixed this issue for other people. I'm likely going to keep my stock DV until I get my tune, but this is an issue I plan to address down the road. |
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09-29-2020, 03:49 PM | #3 | |
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09-29-2020, 04:00 PM | #4 | |
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2) How is your ignition timing? 3) did you check for fault codes with ISTA? 4) It shouldn't be possible for the DV+ to open unless the factory solenoid pulls the plunger, because the way the piston is desgined it transfers boost to the back side which has a larger surface area, so the higher the boost the harder it is to push the piston open to dump said boost. I personally went with the GFB unit over the turbo smart for a variety of reasons. But I do not think it is the diverter valve's fault unless the install was botched, or your solenoid was buggy.
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09-29-2020, 04:37 PM | #5 | |
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2)I asked the question and their good i haven't got a log as its still at the tuners. 3)I really would hope he has but I will check tomorrow when the garage is open. 4)the botched install has crossed my mind. As has the solenoid. I don't think it is the dv+ either and it is my preferred choice over the turbo smart. I was getting a bit of flutter mind with the dv+ but no boost dumping. Its odd as it only does it once it warms up. On my last tune I didnt experience it. So in your opinion which one do you think? Or could there be a boost leak that could cause it |
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09-30-2020, 12:08 AM | #7 | ||
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09-30-2020, 01:14 AM | #8 |
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09-30-2020, 01:17 AM | #9 |
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I belive they have checked all the o rings I will check about the ista and logs later. The garage doing the map isn't the garage that done the work
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09-30-2020, 12:05 PM | #10 |
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If the wastegate is acting properly I would pull the DV and see if it's assembled correctly. Did they replace the mainspring that came with the DV+?
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09-30-2020, 02:37 PM | #11 | |
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The important spring is the plunger spring, if that is excluded the valve would dump boost non-stop because the plunger would not be able to seal the valve when the solenoid's magnetic force is turned off. If the wrong plunger spring was used, i.e. the stock spring, then the plunger would not be able to open as the spring is too stiff and long for the magnetic force from the solenoid to over come and pull the plunger open, and you would get compressor surge. So the only 4 probable causes for a boost dump to be caused by the DV+ are: 1) No plunger spring was installed 2) Damaged solenoid or DV+ 3) Missing O-rings 4) Improper install And since OP says it gets worse when the car gets warmer I am going to say it is not the diverter valve, especially since the stock solenoid is so durable I have never seen one fail, and because the GFB DV+ is so simple (orientation doesn't even matter as the plunger side is symmetrical so you don't even have to align it like the stock diverter valve with the alignment pin) I have hard time seeing someone install it wrong.
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09-30-2020, 07:11 PM | #12 | |
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I think i got it wrong with my expansion and got it arse backwards i belive the boost is pushing the valve shut and dumping boost after. Mybnew valve will be on the car in the morning and the tuner said he's fairly positive that is the problem. I'm not convinced its the Diverter valve |
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09-30-2020, 07:37 PM | #13 | |
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If boost is pushing the valve shut and dumping it after that is exactly how the valve should be behaving, so it shouldn't be the diverter valve. So you might be wasting your money getting a turbo smart valve. Also when you leak tested the system how was that done? Was there a smoke test as well? Also it's really weird that it dynos boost when it's hot, it makes me think that when the car gets hot it might be pulling timing or something and as a result it cannot make power and must dump boost.
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10-10-2020, 05:18 AM | #14 |
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Did going to the turbosmart solve your issue?
Slightly off topic but according to Pure Turbos and their testing they are seeing 10-20% lower duty cycle with the turbosmart over the GFB DV+ Might open some more room for power or just create an overall more efficient system. |
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10-13-2020, 03:39 PM | #15 | |
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10-13-2020, 05:36 PM | #16 | |
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If you want the cheapest possible solution and if your exhaust housing is ok you could get a stage 1 turbo. There was also alot of stock stage 1 section aka everything but the exhaust housing for sale here for really cheap too if you're interested.
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10-14-2020, 11:13 AM | #17 | |
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Hopefully it will be all good then |
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10-16-2020, 02:55 AM | #18 |
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10-16-2020, 03:51 PM | #19 |
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