I wish every aftermarket company took the time to do these kinds of videos like you do. From the disassembly of the entire part and the explanation of all the design choices to the principle of how it works, as well as the live demonstration on a test rig- I really, really enjoyed your video and learned a lot. I will be picking this brand!
just installed mine on my abarth, and my god is it good. Pros: -Throttle response makes it feel like my car is NA -Boost holds at high rpms (and feels like the rpms climb faster) -most significant change is low end torque, it just takes off (feels like its quite a bit faster 0-60) -big changes to performance for such a small and relatively cheap part Cons: -Installation is difficult, at least for an abarth 500. ( have several hex/allen keys on hand you're going to drop many)
Put this on my Abarth 500. Works pretty damn good, makes the drive a whole lot smoother and holds in the boost near redline. The stock piece was garbage and made of plastic, I have no idea how it even worked in the first place. Without the DV+ my car would shudder badly when letting off the throttle and jumping back on the gas. The factory piece would just dump all the boost at the slightest lift off the throttle which is VERY annoying behavior, DV+ solved that. Also near redline boost would leak all the way down to 12psi immediately after reaching peak boost of 18psi. Now with the DV+ the gauge pegs at 16-18psi and stays there like it should. Definitely a step-1 mod on the list before you do anything else to your car.
Having trouble keeping the DV+ housing on the stock diverter valve housing, I have it lined up and assembled as per the directions But the DV+ wants to keep popping of the off of the stock dv. I've done one of these before but didn't have this problem
how much boost could this dv+ hold, theoretically the way it´s build it could hold an almost infinite amount of boost, since there is no membrane it seems this could be the absolute best solution for VAG vehicles, is this correct?
@@gfbvideos hi noticed there's 2 versions from authorised sellers. Which one is the newer, revised one? The one with 3 vent holes or only 1 vent hole in the housing where the brass piston seats in?
@@JH-sc7cs The one with 1 hole is the more recent version. There is no functional difference between the two, it is purely for manufacturing efficiency improvements. If you have questions about a specific seller please contact us and send links to support@gfb.com.au
so a couple months ago i installed this on my mk6 gti and it worked amazing no turbo lag what so ever then it suddenly started not working so i got a rev d diverter valve and threw the gfb dv+ on that and same exact thing anyone have ideas on what it could b??
This DV worked wonders in my 2.0 TSI Seat Leon FR, eliminated most of the lag found at low RPM's (running an APR stage II+ remap) and gave me full boost at a wider RPM range, I totally recommend it! Do not waste your money on those expensive valve kit "solutions", this DV is the shit!
Fitted mine today in my GTI K03, feels a lot more responsive low down and as it has an induction kit on it you can hear the DV is closed much more than the stock one, no more constant loud hissing on part throttle. One thing though, loud flutter on gearshifts, have fitted turbo muffler delete though. Should there be any surge releasing throttle on boost? Sounds cool to me but just wondering if it's normal.
Hi Andrew, Depending on your level of modification it may be normal to hear some flutter under certain conditions if you choose to use the main piston spring. I would suggest getting in touch with our engineers at support@gfb.com.au and send some video of what's going on and info about your car so they can take a look
Not sure if it will prolong the life of the turbo but it's designed mainly to improve throttle response recycling the air into the intake, it will definitely not add any more boosts.
I'm quite keen on one of these, will they work effectively on a supercharger setup? I've got a vortech (CAPA) supercharged xr8 falcon that uses the age old VGA style plastic valve (same as the factory turbos/etc). Obviously with a supercharger constantly blowing air, even at idle i needs to get out and i certainly dont want to see any comp surge on a centri blower! I assume since its just plumbed directly to manifold vac line, if the throttles shut/plenums got vac, and the rear valves being held open, the blower airflow will just hold the GFB open too vent the whole time (since pressure will never drop to zero) Really keen to throw away this plastic POS and get something good on there without having to go hacking at things and modifying everything, love the idea of unit, straight plug in!
Installed mine a week ago and its working perfectly. Just a quick question, the piston it’s upside down when installed, how it holds itself on place? Its the continued pressure what makes it stay on place?
Glad to hear you're enjoying the valve! I'm not sure what you're referring to about the piston sorry. If you can let me know what vehicle it's installed on I can give you a bit more information about how your specific valve works
@@gfbvideos in my 2.0tfsi, the diverter valve is positioned “upside down” so the piston its facing the floor. Just for curiosity, how it holds himself on site? By the pressure turbo makes?
@@eduardosq99 Yes the piston is held closed by boost pressure. The area difference between the front and back sides of the piston mean that there is a greater force acting to hold the piston closed
Do you have to modify the OEM solenoid on a 1.4l dart??? Wont lie I got a knock off DV+ and had to modify it and now I have no power. Have a brand new solenoid on order from euro compulsion
You don't have to modify the OEM solenoid, but you do need to completely disassemble it, meaning the little plastic ring that holds the blue seal needs to come out. But you don't need to modify anything.
I don't have the plunger spring with my kit.. I know i can buy one for around £9 but that's quite a hit for a small spring. The early kits just used the stock spring.. would it be safe to use until I can get the gfb plunger spring delivered?
It will work with the plunger spring, however at higher boost pressures the valve will blow open. This may or may not be an issue depending on how much boost pressure your car makes. If you purchased the part new and the spring was not there it may be covered under warranty. Please contact our engineers at support@gfb.com.au
I have the N13B16 BMW engine in my car. Acording to the description both the T-9356 and the T- 9357 will work with this engine. I ordered the T-9356. What is the difference to the T-9357?
Hi Siegbert, Only the T9356 will work with the N13 engine. The T9357 is to suit the N20 engine. You can search your vehicle on our website to display the correct fitments.
@@gfbvideos Hi, thanks for the quick respond. Got my T9356 today and already installed it. It works great. No more starting weakness, no more giant turbo hole between gear shifts. Im also happy to see that there is no error code reported by the ecu(big spring installed). This thing is worth every cent.
Hi Jordan, Sorry to hear about your valve issues! We do have lifetime warranty on our parts, so if you can send us an email at support@gfb.com.au we'll be happy to help you sort that out
I have the GFB DV+ in my 1.4T multiair engine, and I am very happy with it. I read some forum posts that say that the forge valve (which is a direct replacement of the stock diverter valve) is better. They say the forge valve has zero leaks, whilst the GFB one, is better than the stock, but still has some minor leaks. Is that true? My opinion is that the forge one is way more complicated to install, with many more prone-to-fail parts. Brett can I please have your comments on this?
i dont mean to be off topic but does someone know of a method to log back into an instagram account? I stupidly lost the login password. I appreciate any tips you can give me
@Ruben Camdyn thanks so much for your reply. I got to the site on google and Im waiting for the hacking stuff atm. Seems to take a while so I will reply here later when my account password hopefully is recovered.
Hi, the issue on most of the vehicles the T9352 is intended for is clearance, as the VTA is quite a bit taller than the DV+ version. A little secret, the VTA we sell for the Mercedes (T9458) will fit the same turbo and diverter valve as the T9352, but it probably won't have enough room around it to fit. If you can let me know what vehicle you've got, I can advise if you've got a chance of fitting one on there. Best to contact us through our support channel via the website, as we may need you to send some photos of your factory diverter valve.
@@cjerp The location of the diverter valve on the 508 is actually different to the Mini, which in your case works in your favour. We have had a customer fit a T9458 to a 508, however the top of the solenoid does press against the plastic turbo intake pipe, which is why we don't list it as an official fitment. If you'd like to see a photo of the installation please contact us through support.
Hi Walid, Thanks for your feedback! We're glad you're loving the throttle response of the DV+ While some people may be looking to get that flutter noise, the purpose of a diverter valve is specifically to avoid this. Flutter is the noise created by compressor surge which is potentially harmful to the lifespan of the turbo. This happens when there is excess pressure and low flow, such as when the throttle closes The diverter valve is designed to release excess pressure and avoid this.
Fair comment about oiling during installation, but periodic maintenance/oiling is not something that is required. The anodised bore is extremely hard wearing and does not need oil for proper operation or longevity. We only suggest it during installation (in the instructions, obviously I neglected to say in this video) as it's a bit like breaking in an engine - the microscopic high spots left over from machining on the piston will be flattened during the first week or so of operation, and a bit of oil is beneficial for this process. Ongoing however, oiling is not required. If you find your valve is getting stuck, it is likely a different cause, and removing and oiling it is masking that cause. As we mention in the instructions, the piston to bore clearance is extremely close, and it's possible there is some very minor distortion or damage on the piston that you could only detect with precision measuring equipment. Please contact us here if you have any concerns about this gfb.com.au/contact-us/tech-support/
@@HybridShedIraq If that was your experience and it solved the problem once and for all, that's good news. However, if it continues to occur, I'd suggest contacting us via the tech support link in my reply above. My point was that even if it did solve it for you, for the benefit of people reading these comments it is not a required ongoing maintenance technique - as I mentioned above, if you do have to do this regularly it's a band-aid that is masking another underlying issue.
Hi. So now, five months later no problem ? No stuck piece ? Dont need to re oil it ? Id like to know before install it on my 7R golf. Thanks for your reply
@@gfbvideos thanks a lot for your reply, very nice explanation. Another thing, I wonder where does the blow off sound come from given that the design is closed from every where and why does it sound a little louder after I installed the DV+?
@@MohamedTarek-qm3vf The sound comes from the intake. The air is re-circulated back into the pre-turbo side of the system, so depending on what intake you're using you may hear the air vent. The stock filter and intake is designed to block out these noises, so you're less likely to hear them. With an aftermarket intake that's less restrictive to noise, you should be able to hear it. The DV+ shouldn't really have any effect on the volume. It may be that you're just listening for it more, or it may be that something else has changed
Part of the explanation had a mixup of pressure vs force consent. Two sides of piston have equal pressure => no force. Doesn’t matter how the piston is designed or if u paint part of it in red or if you ‘think’ one side is 20% bigger. Classic mistake.
Thanks for the feedback, you'll be glad to know we've stopped using background music. You can tell this video was made 8 years ago by engineers, now we use proper media people so we can stick to engineering products!
