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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
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★★★★★ 5
Clear Clean face
Style: Acne/Rosacea Prone Skin
Recommended by my dermatologist for my daughter. Was having tiny bumps on her forehead. Cleared them up. Works great. I recommend as well
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Reviewed in the United States on April 14, 2026
★★★★★ 5
Amazing sunscreen, no residue
Style: Uneven & Discolored Skin
Took to Mexico along with my other La Roche skin care and it was amazing!!! Face never got burnt and it didn’t leave a cast and was lightweight
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Reviewed in the United States on April 26, 2026
★★★★★ 5
Great product
Style: Uneven & Discolored Skin
Not waterproof, but I use this under my makeup everyday. No scent, not super greasy, and goes under makeup well. I love La Roche Posay products. I have noticed a slight improvement on dark spots over a few months, but it's quality ingredients. This is a daily sunscreen, but it's not for a heavy beach day if you're going in the water. It's definitely water soluble which is great for every day wear.
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Reviewed in the United States on April 8, 2026
★★★★★ 5
Worth it
Style: Uneven & Discolored Skin
This is perfect sunscreen if you have dry and melanated skin. Always glowing afree putting this on annd no white cast ever. There are also no irritants in the sunscreen so applying too much won’t break you out look other sunscreen. The bottle also lasts for about a month 1/2 at a time. Great product
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Reviewed in the United States on April 9, 2026
★★★★★ 5
Easy to use, no white residue
Style: Uneven & Discolored Skin
This is one of my favorite skincare products. It is easy to apply, it really goes on smoothly, does not feely greasy or icky, and best of all no white residue. It works well under makeup. At SPF 50, it offers great skin protection and is my go-to on a daily basis.
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Reviewed in the United States on April 20, 2026
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