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Description
Forge Intake Pressure Compensation Valve - FMIPCVForge Motorsport has long been associated with clever, ground breaking innovations, but the companys latest design is one of the smartest ideas to appear onto the automotive aftermarket for quite some time; the Intake Pressure Compensation Valve (IPCV) an idea so ingenious that we have patented it! Dump valves, Blow off valves, call them what you will, but hopefully, were all reasonably familiar with the concept these components are a safe way of
Forge Motorsport has long been associated with clever, ground breaking innovations, but the companys latest design is one of the smartest ideas to appear onto the automotive aftermarket for quite some time; the Intake Pressure Compensation Valve (IPCV) an idea so ingenious that we have patented it!
Dump valves, Blow-off valves, call them what you will, but hopefully, were all reasonably familiar with the concept these components are a safe way of allowing excess boost to escape harmlessly when off-throttle, and holding the boost system tightly in check when mashing it into the carpet. Excess boost vents either to the atmosphere, with its familiar metallic sneeze, or for those that prefer their journey to sound a little more subtle, back to the low pressure side of the turbo circuit, depending on the type of valve you run.On cars with low or factory boost pressures, the spring or diaphragm inside these valves only has to be a fairly weak affair. This allows the valve to move quickly and freely, but with the downside that the valve is useless on a tuned or high-boost car. That lack of resistance simply wont be able to keep the valve gas-tight as the boost pressure increases.
For tuners, the solution to that problem has been simple for many years now, simply up the spring rate inside the valve (diaphragms tend not be up to the job on tuned vehicles) to allow it to cope with the higher internal pressures created by the tuning process. This keeps the valve shut under load, but with the downside that response time is reduced thanks to the spring being stiffer, and therefore physically harder to compress.The fitment of the stronger spring can also limit the opening of the valve which restricts the volume of air it can flow. For this reason, most quality valves come with either a choice of springs or some kind of internal pre-load adjustment, in order to allow the tuner or owner to set the internal spring pressure to match their boost settings.
But this brings us onto to our next problem. Thanks to the plethora of sophisticated ECU software out there, these days, many cars also have some kind of easily-switchable throttle maps. On systems like EcuTek, where moving between throttle and boost maps can be as simple as clicking and flicking your cruise control switch, how on earth can a dump valve spring be perfectly set for your everyday 1.0 bar map, but also work perfectly for your drag strip all-out 1.4 bar mental mapping? Put simply, it cant so up until now, all dump valves had to be set to some sort of compromise to be a jack of all trades, and master of none.
If only there was a way to make the dump valves spring operation completely independent of the spring pressure inside. A way to allow its function to work perfectly at any boost level. Clearly concerned by this very same problem, Forges technicians beavered away to find a solution. What they came up with is called the Intake Pressure Compensation Valve (or IPCV for short) and its really rather clever.
What makes the IPCV valve ingenious is that it re-routes the various high and low pressure feeds through a clever internal piston system (see diagram). When the throttle is opened and the car is accelerating, boost pressure generated by the turbocharger will ensure that whichever dump valve or recirculation valve you have fitted will be kept sealed. As no boost is now being lost through the intercooler (which can usually be anywhere between 1-3 psi of boost drop) the pressure acting on top of the piston of your dump valve is precisely equal to that underneath it. The result? Only a relatively weak spring is required to keep it operating, which means response times can be kept quick and throttle response is immediate.
As dump valve springs usually have to compensate for the pressure drop across the intercooler, and this problem is now no longer an issue, the dump valve can now be run with a very weak spring. In fact, during testing, Forge Motorsport has actually been able to make this system work with no spring in the dump valve at all!
When the throttle is snapped shut either to change gear, or on over-run, the vacuum created by the engine opens up the dump valve and allows the air to either recirculate back around the turbo (in the case of a recirculation valve) or straight back out to the atmosphere. Put simply, what these means, is that even on a fire-breathing 1200 bhp GT-R, the dump valves now only require a very weak spring to operate perfectly with no boost loss, allowing them to open more responsively on partial throttle, improving performance in every gear, and at whatever revs you care to use. Best of all, this principle works as well on a bone-stock Subaru WRX as it does on a Drag-spec Evo. Boost levels simply dont affect this part of the equation any more.
So if you want to know that your valve is always perfectly matched to your engine at all times without any spring changing or adjustment - just fit the Forge IPCV.
In The Box:
1 x FMIPCV Valve
1 x 2000mm Length of 5mm Vacuum Hose
1 x Flat Bracket
1 x Bent Bracket
1 x 5mm T Piece
1 x 6mm T Piece
1 x 6mm Joiner
1 x M6 Penny Washer
1 x M8 Penny Washer
3 x Alternative Vacuum Ports
2 x M4 x 6 Socket Cap Screws
1 x Instructions
1 x Forge Sticker
Applications:
Saab
93
95
Volkswagen
Polo 1.8T
Golf MK4 1.8T
Passat 1.8T
Fiat
Fiat 20v Coupe
Audi
A3 1.8T
A3 1.8T FSI
A4 1.8T (B6) 01-04
TT MK1 98-06
S3 1.8T (8L Chassis)
S4 2.7T
A4 1.8T (B6) 01-04
TT MK1 98-06
S3 1.8T (8L Chassis)
S4 2.7T
Ford
Focus RS Mk1
Fusion 2.0
Focus ST250
Escort RS Turbo
Focus ST225
Focus RS Mk2
Subaru
Forester
Impreza
Mitsubishi
Evo 10
Porsche
996/911 Turbo
Nissan
GTR R35
Juke 1.6 Turbo
GTi-R
Volvo
850 T5
Focus RS Mk1
Fusion 2.0
Focus ST250
Escort RS Turbo
Focus ST225
Focus RS Mk2
Subaru
Forester
Impreza
Mitsubishi
Evo 10
Porsche
996/911 Turbo
Nissan
GTR R35
Juke 1.6 Turbo
GTi-R
Volvo
850 T5
Founded in 1996, Forge Motorsport is a performance parts manufacturer that prides itself on the ideals of innovation, clever design, customer care, and making products of only the highest build quality.
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.7 ★★★★★
Based on 26 reviews
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Product Reviews
★★★★★ 1
DO NOT PURCHASE APPLECARE+ THROUGH AMAZON (Please read before making a decision)
Style Name: MacBook Air 13" (M4), Configuration: 3 years
I rarely write reviews like this, but DO NOT PURCHASE APPLECARE+ THROUGH AMAZON.
Just over a month ago, I purchased an Apple MacBook Air (m4) with AppleCare+. The AppleCare+ wasn't populating on the laptop, so after calls with Apple Support and Apple Agreement Administration, they found that AMAZON sent them the approved agreement with the device serial number then abruptly canceled it the following day. This happened over a month ago, and I was not notified nor have I received a refund.
I would not have known it was canceled if not for Apple Support and Apple Agreement Administration.
The only recourse is to receive a refund from Amazon--which is NOT automatic, I am fighting for this--and purchase AppleCare+ directly through Apple. Had all this taken place after the 60-days purchasing the MacBook Air (I'm currently one week short of this deadline), then I would be SOL on being able to cover my device.
PURCHASE AT YOUR OWN DISCRETION/RISK AND CHECK THAT APPLECARE+ IS APPROVED AND ACTIVE ON YOUR DEVICE. Otherwise, play it safe and activate directly through Apple.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on December 28, 2025
★★★★★ 5
Worked fine for me 🙌🏽
Style Name: MacBook Air 13" (M4), Configuration: 3 years
I read a lot of comments that said there was an issue with their purchase of AppleCare+, I did not have any of those experiences. AppleCare+ was on the laptop (MacBook Air, 13-inch 2025) automatically. I received an email with my confirmation of AppleCare+ coverage, along with my agreement number, product serial number and expiration date. There was nothing I needed to do on my end, because as I said it had already been added to my computer and attached to my iCloud account. — I hate that there are so many bad experiences and hope everything works out for anyone experiencing a nightmare but I can only recommend based on my experience, 10/10.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on August 4, 2025
★★★★★ 5
No la necesito
Style Name: MacBook Neo 13" (A18 Pro), Configuration: Monthly
Garantía digital , no la necesito no compré la laptop
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 26, 2026
★★★★★ 5
Fantastic product
Size: 8 Fl Oz (Pack of 1)
Works Great, at first didn't believe all the reviews, I've bought 5 chainsaws from one season to the next. After each winter couldn't get them to start. Followed the instructions to flush and let sit for a few days. Every one started and ran great. Hands down, this is a remarkable product for cleaning out blocked fuel systems from sitting all winter would recommend it for all 2 cycle engines and use the stable blend for winter as well as anytime use to prevent fuel spoilage.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 12, 2026
★★★★★ 5
Efird, a great product
Size: 8 Fl Oz (Pack of 1)
Used this in a Troy Built Garden Tiller, the tiller would stall and hard to crank until we use the Sta Bil Fast Fix, tiller now runs great and does not stall.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 25, 2026
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