N75 "J" Valve fitting..

[SimmoCupra]

Just got me a new N75 J (034906283J) but i noticed the in/out plastic legs are different lengths if I keep the electrical connector facing the same way..

I.e the metal case is inverted. Are these fitted in the same orientation as the Standard "F" valve. or am I keeping the pipe lengths the same. if that was the case that would mean the electrical connector would be facing the opposite direction..??

 

[DPJ]

Yes, the electrical connector will face the 'other' way.

 

[Prebs]

DPJ: Are you running the -J valve?

Prebs

 

[Vin-R]

hi guys .. whats the deal with this N75 J valve??? what does it do exactly?? alot of ppl used to speak about this issue on the mk4 golf forum too... does the LEON have this valve?? and why do ppl change it??? thanks

 

[Lodgey180]

the n75 valve is your boost control.
n75j is a uprated one which gives you a few extra psi i belive

 

[dmmsta]

the n75 valve is your boost control.
n75j is a uprated one which gives you a few extra psi i belive

Don't think it gives you anymore pressue, just changes the delivery...?

 

[Nev_LCR]

Don't think it gives you anymore pressue, just changes the delivery...?

what so its more like NOS on fast and furious films ..........

 

[Lodgey180]

Don't think it gives you anymore pressue, just changes the delivery...?

ah right

just read up that its only good on mapped cars coz it was was making standard cars going into limp mode due to over boosting..

 

[Lodgey180]

what so its more like NOS on fast and furious films ..........

its not how you stand by your car its how you race your car

 

[dmmsta]

what so its more like NOS on fast and furious films ..........

Silly...does it come with a laptop?

Seriously, I thought that it changed the boost curve from a progressive build-up towards more of an all at once type of thing...we are into an area where I know more about ironing than I do N75 valves...

 

[Nev_LCR]

its not how you stand by your car its how you race your car

i need 2 of them...........the big ones.

ok enough of the before we get and i would understand why,

 

[Vin-R]

cheers guys that clears itnup fine .. ,may look into it after remap

 

[S3 AKR]

LMAO at the film quotes!!

The N75 controls when the excess boost pressure is released and how quickly. When you change it to a 'J' version it causes the excess to be released slower as it has different electrical properties that cause it to open less than the standard one so you get more boost for longer.

Cars go into limp mode if the version of the N75 is too aggressive for your car. When I had an S3 210hp version I swapped mine to a 'J' and it was the best mod for £40 you could do for that car. I think that it was the 'H' version that was on some cars too aggressive for them and threw them into limp mode.

Remaps aren't what stops it going into limp mode though as the better ones don't remove or change the limit for excess boost that causes limp mode to activate. The N75 change just runs your engine much closer to that pre-set limit.

Here endeth the lesson as I understand it!

 

[turbin]

LMAO at the film quotes!!

The N75 controls when the excess boost pressure is released and how quickly. When you change it to a 'J' version it causes the excess to be released slower as it has different electrical properties that cause it to open less than the standard one so you get more boost for longer.

Cars go into limp mode if the version of the N75 is too aggressive for your car. When I had an S3 210hp version I swapped mine to a 'J' and it was the best mod for £40 you could do for that car. I think that it was the 'H' version that was on some cars too aggressive for them and threw them into limp mode.

Remaps aren't what stops it going into limp mode though as the better ones don't remove or change the limit for excess boost that causes limp mode to activate. The N75 change just runs your engine much closer to that pre-set limit.

Here endeth the lesson as I understand it!

I use the "H" version and it was a clear step up from the stock part.

 

[Lodgey180]

hey thanks man lol

lesson learnt

 

[CupraUK]

I went from a J to an ECS mainly because it's around the right way (J is from the V6). The ECS is fiddled with version of the J. I don't think it makes much difference, but I've never ever had limp mode.

 

[Lodgey180]

but if it makes no difference the me no want !!

 

[S3 AKR]

The N75 does make a difference...... I think he meant ECS vs J. When you fit it, you might have to free up the wiring a little just to get that extra inch of slack to plug it in but it will reach and you won't regret fitting it. On a 210hp S3 it made a noticeable difference, no question.

 

[turbin]

done some searching and from different VW forums around they say the ECS N75 is really an N75 "H" without the partnr on it. Can someone confirm this?

 

[S3 AKR]

I am fairly sure that the H version on remapped 210/225hp engines caused a lot of limp modes! It depends on the car to some degree but it pushes things so close to the limit that it really doesn't work well on a lot of engines - it seems to be luck of the draw really. There is loads on the UKMKIVS forums about this though.