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Hi All,

I have a question on air filter on my skyline and max boost I can run .

it is skyline r34 r25det standard . I know reading around people do say do not run the boost more that 0.85 which is around 11psi on the standard engine .

If I purchase a boost controller can I increase the boost to 11 psi and remove the 2 stage solenoid ?

what bhp should I expect ?

if I run it too high, is the worst case, wastegate opens at 1 bar = 14 psi ?

if turbo is abused would that only fail with nothing else going with it ? what are the symptoms of a tired or failed turbo ?

my filter is one of the cheap cone ones as per the picture below.

I want to replace it with K&N , would k&N which retail at £79 in the UK be good enough for up to 450-500bhp which I want to achieve by changin turbo and manifold in future ?

Also I should mention I have received a large front mounted intercooler with my car so will be planning to install it which I think makes the air denser and cooler.

picture of my air filter

2u76afb.jpg

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connect the pressure source to the waste gate and you will run waste gate pressure which is around 7psi. or use a bleed valve to get more boost.

that's very expensive for a filter, when some of the cheaper ones are just as good.

Pods are crap. Std airbox FTW.

11 psi is about as much as you can run on std ECU tune without the ECU going into a self protect mode called R&R. Maybe 12. 14 psi will eventually see your turbo in pieces. If you have boost, your turbo is currently fine.

Google is your friend.

Don't worry about the hp - a little more boost will get you a little more power. Decat won't do much without a 3in front pipe. You probably won't find anyone to "remap" your ecu you will be looking for a Nistune chip or similar when you start changing turbos. There is a ton of info on this site - search first. If you can't figure out the search function just google the question - often you will be referred back to this site anyway.

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