PART NUMBER: 61-1973
Worldwide Patent and Design Patent Pending
GFB expands the DV+ range with a direct-fit solution for the weak factory diverter valve used on many European vehicles.
The solenoid coil itself from the factory-fitted valve is great (the ECU opens it faster than any pneumatic valve so why replace it?), but the weak point however is the valve mechanism itself. So GFBs DV+ solves this problem by replacing just the valve parts with an anodised billet aluminium housing fitted with a brass piston machined to exacting tolerances.
The end result is sharper throttle response, lightning-fast valve actuation, and it will hold as much boost as you can throw at it.
Other manufactures products involve replacing the entire system with a traditional pneumatic valve, requiring long vacuum hose runs, additional parts for tapping into the intake manifold vacuum, plus either a different solenoid valve to actuate the pneumatic valve or a ballast resistor to plug into the OE wiring loom. All these additional items result in a product that is slower, less responsive, more expensive and takes much longer to install.
GFBs DV+ solution on the other hand is more responsive, less expensive, easier to install, and doesn't cause compressor surge/turbo flutter. Oh, and it doesn't require different springs or frequent re-builds.
Many late-model European cars use ECU controlled solenoid-type diverter valves. This is a good concept because the valve can react very quickly and it only opens when it needs to.
However, there are some problems with these valves. There are typically two types of solenoid-actuated diverter valves found standard on VAG and European cars, both of which have their shortcomings.
Common OE Problem #1
Common OE Problem #2
In both cases, the solenoid on the OE diverter is directly connected to the valve mechanism, which is not ideal because neither it nor the return spring are strong enough to open and close the valve reliably at high boost.
With problems like this, you can see why other aftermarket manufacturers assume the best solution is to replace the factory diverter entirely. Unfortunately though, whilst their replacement kits might be stronger than the factory diverter, their slower response speed and lower flow do not justify the extra cost and complexity - more of a compromise than a solution.
GFB has taken a different approach to deliver a complete solution that solves existing problems and improves performance, without compromise or a hefty price tag.
The DV+ addresses the factory valve problems with a very simple and elegant solution. Keeping the factory solenoid retains all the benefits of the stock system, and replacing the valve parts with indestructable metal components ensures strength and reliability no matter how much boost you run.
That's not all. Rather than using the solenoid to directly actuate the valve, we have introduced a unique pilot-actuation system. This means the solenoid controls the air pressure that is used to open and close the piston, so it doesn't matter how much boost you push through it, the DV+ will open and close reliably without ever exceeding the solenoids capability.
This feature also improves on the factory system by opening the valve progressively in response to boost pressure, so it only opens as much as required to get the job done (the factory valve simply opens and shuts, it cannot partially open if boost pressure is low), resulting in better throttle response.
Sean's Installation Notes:
Do not pass go until you have purchased a GFB Diverter Valve. This is one of the best upgrades for the 1.4 engine turbo engine, even if it is bone stock. Boost is more consistent, throttle response is sharper and the operation of the valve is silent. Installation is very easy and takes less than an hour.BRIAN'S APPLICATION NOTES: YES, this is in our Fiat 124 because we noticed even the first day of driving that the boost delivery was lumpy and inconsistent...which this item fixes. The stock valve is leaking all the time, by inconsistent amounts. If you want the boost delivery smooth and reliable, this is your first mod!
NOT CARB APPROVED, CANNOT SHIP TO RESIDENTS OF CALIFORNIA.
Easy 10 minute install. This should be the first purchase for any FIAT Spider owner. Very noticeable when starting out in 1st gear.
Installed this in about 20 minutes. Noticed an immediate difference in the smoothness in acceleration when running through the gears! Makes the car even more fun to drive !! Did not think it would be that noticeable. Thanks, I love it!
Hi Brian, I finally out the GFB diverter valve in my 2018 Fiat Spider. It didn't take long to install. I noticed the difference just by backing out of my garage bay.I didn't have to increase the RPM as much. Off the line in first gear is great! No more increasing the RPM to prevent a stall. In the low gears, the turbo lag is virtually gone. Great Product. Next week the complete exhaust,resonated with quad tip.
Easy install. Almost completely removed issue of turbo lag. Definitely not on or off like the factory part. So smooth. Makes changing gears less dramatic. No issues with check engine light. Very satisfied.
I just received my diverter valve upgrade from good-win today. it was probably one of the easiest things I have done to a car.
the performance overall seems to be the same, but where this thing is great is when you are tooling around moving slow in stop and go traffic. it seems like you are on boost at considerably lower rpm's.
I have stalled my car a few times before the replacement in traffic. it seemed like the engine was not generating any power below 1500 rpm, causing a stall. if not stalling it was a bit jerky in transition from idle to low rpm crawling. the installation of the d/v seems to have cured this condition, also when shifting the transition is also much smoother.
I know learning a new clutch is sometimes getting to know the feel of a new car, but having driven manuals for 33 years now I have a decent level of mastery of a manual cog swapper.
this d/v based on ease of installation and noted improvement in operation is a must have.....
Install was pretty easy although original part damaged - too fragile to get out with anything I had.
Turbo performance is better with this part, although it did not eliminate all the "lumpiness" as Brian calls it - probably 50% better. This is the first upgrade on my new 124. Perhaps new crossover/midpipe/exhaust will get rid of the rest?
Hi Brian, the GFB diverter valve I put on my 2017 Fiat 128 Abarth has really given the car a nice smooth boost since I installed it. Installation was actually very easy and I did use the spring and have not gotten any bad codes and have driven the car a bit hard a couple of times and I did pull away from a couple of porches for a stretch but of course they caught up with their extra horse power, mine just came on a bit quicker than theirs and it really pushed us into the seat when we hit 25000 RPM-3000 RPM. Just like my old Mazdaspeed. waiting for the intake to come available.
Great product. Does take some time to install but worth it. I would have given this 5 stars but would suggest a tool be included to remove the plastic ring for the factory unit so not to damage this piece.