Reply With Quotecheers mate, i already have a basically brand new n75 race from ECS... It just doesn't seem like it wants to be friends with my ECU for some reason. So i think ill have to head into a stealership and get an OEM and see if thats helpful.
Ultimate Dubber
Have a spare race one in Syd if you want to buy / try. Barely used.
From memory the race is installed what looks like backwards, the length of the barbs should help show orientation. Make sure you're not installing the spare backwards.
Last edited by noone; 04-05-2013 at 12:27 PM.
Volkswagen Fan
cheers mate, i already have a basically brand new n75 race from ECS... It just doesn't seem like it wants to be friends with my ECU for some reason. So i think ill have to head into a stealership and get an OEM and see if thats helpful.
'02 GTI (clicky) - REFLEX SILVER - VIEZU race tune. VAR design 2.5inch stainless steel dump pipe with 100cell cat into 2.5" billyboat stainless cat back, Forge TIP, N75, Audi DV, ghetto CAI, FK-AK s coilovers, tunerdone LEDs, Clarion CZ301E sound stage.
Volkswagen Fanatic
Have you checked out the wires that connect the N75? If the turbo spools it's nuts off with the Watergate line clamped it has to be something electronic right? Have you tried using a mbc just to see if it'll hold boost?
Volkswagen Fan
wiring appears okay, ill test continuity all the same.
There are no N75s in victorian stealerships atm. Awesome.
Other option is running an MBC, im just kind of uncertain if itll be smooth enough.. As ill need to go buy one, i dont want to be bunnyhopping on and off boost.
'02 GTI (clicky) - REFLEX SILVER - VIEZU race tune. VAR design 2.5inch stainless steel dump pipe with 100cell cat into 2.5" billyboat stainless cat back, Forge TIP, N75, Audi DV, ghetto CAI, FK-AK s coilovers, tunerdone LEDs, Clarion CZ301E sound stage.
Volkswagen Fan
tried flipping my N75J after reading through some real old uk forums... so the long tip was not into the TIP, but towards the WG... which is not how 95% of people install it.. Gained 5psi. boost is a tiny bit jerky in 2nd, first pulls pretty hard.
Still doesnt run to tune spec, or how it feels when bypassing the n75.
Catching up with BFLAT later to try out his n75 and see what happens with that.
'02 GTI (clicky) - REFLEX SILVER - VIEZU race tune. VAR design 2.5inch stainless steel dump pipe with 100cell cat into 2.5" billyboat stainless cat back, Forge TIP, N75, Audi DV, ghetto CAI, FK-AK s coilovers, tunerdone LEDs, Clarion CZ301E sound stage.
Dub Crazy
VWwA Super Moderator
They need to be plumbed in correctly. So watch that with you suddenly finding 5PSI.Originally Posted by leighaus
Gavin
Ultimate Dubber
They do install backwards (or what looks like). If you've been missing boost, the ECU may have to do a little recalibration. Could be 1/2 the problem with a leak or VAC issue. Think the MkIV's have vac lines / recirc lines that are prone to splitting.
Volkswagen Fanatic
all n75s instal the same way, long nipple to TIP, opposite nipple to Wastegate and middle nipple to charge pipe. The electrical connector will point different ways depending on what N75 you have. IMO you should use the OEM valve, it's what the tune was written for, I think E is the latest revision for the 1.8t.
Volkswagen Fan
bought an MBC. Installed it with the N75J only electrically connected and the TIP hole plugged.
Was pulling 19 PSI fine for a bit (a bit jerky here n there on partial throttle, but to be expected)... Then i went for a second drive just to enjoy the power and was getting complete boost cut at 17psi, the car makes like a pop and complete loss of power. Did some searching and found it to be somewhat common, whereby theres a limp at 17psi... with likely issues being coilpacks breaking down, dodgey MAF and some reporting that doing the diode mod can fix it.
i wound the boost back to 16psi on the MBC for now and suffer no issues. The car never used to hold boost and does through the rev range for a lot longer now, which is great.
The car is tuned for 21peak19hold, so i'd like to get those few extra ponies once i diagnose the issue.
Last edited by leighaus; 14-05-2013 at 07:32 PM.
'02 GTI (clicky) - REFLEX SILVER - VIEZU race tune. VAR design 2.5inch stainless steel dump pipe with 100cell cat into 2.5" billyboat stainless cat back, Forge TIP, N75, Audi DV, ghetto CAI, FK-AK s coilovers, tunerdone LEDs, Clarion CZ301E sound stage.
Volkswagen Fanatic
21 psi with a ko3 isnt possible , 19 psi hold even more so !
Most tuners run around 16-17 psi with the AGU engine .
Bug_racer supports the rebellion of the euro revolution
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