At what stage do you need to change the spring and the shimmer things in the DV? And are they extra as i dint get any with mine? Its a 007P.
Forge Dump Valve
- Thread starter dreago 1
- Start date
You buy them seperate
Im running a yellow spring in my stg 1 lcr. Feels less edgy
Ben
Im running a yellow spring in my stg 1 lcr. Feels less edgy
Ben
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Oh ok, am I correct in saying its green, yellow an then blue? My car is running at 245 is green the correct spring?
My 007p still has a yellow spring in it as it was mapped to stage 1, but I've had my map taken off now and it's back to standard. Car feels ok, do I need to change the spring or will yellow be ok for a while?
You want at least a yellow with that HP, green will be too soft, i had a blue one in mine but downed it to yellow, thats a 210bhp remapped stage one cupra 180.
Ive got 2 blue springs, 1 red, 1 green and some shims kicking about if any of its any use?
Ive got 2 blue springs, 1 red, 1 green and some shims kicking about if any of its any use?
Are there any obvious symptons of running too soft a spring? Previous owner of my LCR 225 did a Stage 1 P-Torque map but it's still running a green spring. I just serviced the valve and it seems to feel a bit smoother between gears but I'm wondering if I need a yellow spring now.
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Yeh id put a yellow one in it mate for definate, too strong a spring acts like a slamming door when it comes to shutting off the turbo which wont do it any favours, too soft i think it doesnt hold boost aswell as it should?
What he said, those are the figures on the Forge website. I've got a blue spring in my 008, I see peak boost of 23.5psi in 4th, higher in 3rd and 2nd. Still dumps fine, even from part throttle. I have undone my N249 bypass though, I probably wouldn't run that stiff a spring without the N249 in place. It's there for a reason.
You may find the valve gets pushed open, I found that with my 007 on a yellow spring, feels like a flat spot somewhere in the rev range. The shape of the piston in the 007 is heavily tapered, if the spring isn't strong enough and/or you're running way more boost than the spring is rated for then it's possible the boost pressure will force the piston slightly open.
Not sure where you're thinking is coming from there. Assuming you still have the N249 then it has a vacuum reservoir, this ensures there's enough negative pressure to pull the piston open, regardless of spring tension.
Someone said the blue spring in mine was too strong for a stage 1 180 cupra and i should revert to yellow as blue puts pressure on the turbo as its too strong? Mines had the N249 removed.
Someone said the blue spring in mine was too strong for a stage 1 180 cupra and i should revert to yellow as blue puts pressure on the turbo as its too strong? Mines had the N249 removed.
But the vacuum created by the engine is the same no matter whether you're on the stock map or any remap, so how can one spring be "too strong" compared to another?
If anyone can explain this to me then I'll happily stand corrected. The only spring that is "too strong" from what I can work it is one which holds the piston shut even under closed throttle.
This is what i was unclear on, i think whoever it was who told me that basically the spring as youve said does hold the piston shut, when the car 'dumps' the strength of the spring determines how fast/fierce the piston shuts again after its dumped, so if your car is running 10psi for example with a spring designed to work with 20psi pressure it would still dump but the spring being too strong would fight the ' dump ' and shut it off too quick forcing some of the pressure back on the turbo, hence the ' slamming door ' reference.
Thats basically was i told/lead to believe, ill try find the post.
Thats basically was i told/lead to believe, ill try find the post.
No that's not how it works. When the engine generates enough vacuum to open the valve it's because the turbo is not meant to be generating boost so has slowed down. When the throttle is opened again and the turbo is not yet generating boost so what happens is that the valve closes, enabling the turbo to build charge air pressure to feed the engine.
Ideally you want the DV to close after a dump event as quickly as possible.
Ideally you want the DV to close after a dump event as quickly as possible.
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