Jas W

I have changed the little peace of brass in the restrictor pipe and it is now boosting at 1.3 bar (it is just under 20 psi on my boost gauge). i have not hit fuel cut but when it gets close to 20 psi it slowly drops back. i have got a knock link and there is no activity on it, but i am not convinced it is working properly.

What do you lot think?

cheers Jason

Turbo_Steve

Test the knocklink by tapping the engine block with a largeish spanner. You should be able to get all the LEDs on the knocklink to flash nicely without more than a light tap.

Jas W

i could not get to the engine block. so i tapped the bolt it is on and i got a reading. but i would of thought boosting that high i should get some action on the knocklink. at the moment i have the first light on. but it is faint.

Jas W

sorry it is a my 99

MadGrip

I have a MY01 WRX which is boosting at 19psi then drops of to about 17psi, fueling ok and no sign of det


hope that helps

Phil

stevebt

iTrader: (8)

depends if your car has beem mapped for that sort of level of boost if it hasnt id be worried

Jas W

it the standurd ecu with full de cat and air filter. but i think the fuel cut comes in at 1.4 bar.

zhastaph

I tend to agree with stevebt, my MY99 STi would det at anything much above 17psi before it was mapped.

Aztec Performance Ltd

iTrader: (234)

Not necessarily so. Not everybody goes down the mapping path. It is possible to use other methods of boost control etc if you keep an eye on AFRs and KL.

Maybe worth buying a AFR meter and/or get someone to listen with det cans.



1.3bar does sound a little high without adjusting fueling

Mind you, I'm merely learning still.

Bob

911

My Sti ve now runs (for the last 2 1/2 years) 1.31 bar on Optimax, decat and nothing else.
RR @ 314 bhp, and the car is seriously thrashed during hill climb competition.
Head gasket failed a month ago, and so able to check the internals for damage. All smooth, present and correct.
Had fuel cut, and the boost limiter cut in at 1.6bar!
Fixed using a Blitz boost controller fitted by Power Engineering.
911

ticky

When I have tested my knocklink using your similar method, tapping the bolt. All the led's would light up (all the way to red). Not sure if you only got the first dim green light to change from dim to bright by testing this way.

RLE

iTrader: (2)

Run 1.35 bar on Uk97 with booster-very little knocklink activity at all. Not gone down the mapping route either. Plan to increase slightly to 1.4 on Friday with the new TD05 in place etc.