How to install N75J valve??

[Sharkie]

Thought I would add my 2 cents worth.

My pog stock N75 valve was playing up, the car was over boosting and went like a crazy thing followed by limp mode. Guy Harding lent me the N75 valve from his audi tt while he ordered another stock N75 valve for my Pog. The car then proceeded to go into limp mode with the valve from the audi tt, guessing this is the N75J valve. Don't know if this was due to another faulty valve or just it was not the correct valve for the car. My recollection was that Guy said these cars were sensitive to this valve and he wouldn't recommend anything other than the standard one. If you're looking for this valve to give you more boost and if it does, then I think you have a good chance of putting your car into limp mode.

+1, I agree. I had a lengthy discussion with Guy from APR on this a while ago and he had tested this N75 "race" valve on their test Polo and found no benefit was to be had from changing it. In fact he recommended it NOT to be done on an APR chipped Polo.

[AcoustiK]

+1, I agree. I had a lengthy discussion with Guy from APR on this a while ago and he had tested this N75 "race" valve on their test Polo and found no benefit was to be had from changing it. In fact he recommended it NOT to be done on an APR chipped Polo.

+1 for me, talked about this with the guys up in Fitzgerald racing (Evolve-technik) and too advised NOT to put this in which runs a good chance tell the ECU to go into limp mode, the offset of potential problems outweighs the benefit either from their pov.

[insanekiwi]

Wonder if this would increase the peak boost... it's already hitting 22-23psi... I think it's enough for me.

[noone]

Hmmm, there are a lot of opinions, including mine.

I'm happy with the change to the J unit, but its not a requirement.

Can anyone with some technical expertise or experience with this unit or similar situations comment?

[mikepologti]

then again im glad i held back. hmm more thaugth required before this purchase me thinks.

[Whubbsie]

I say if you already have it installed just keep the old one in the glove compartment with what ever tools you need to switch it over... report back if you have issues.

everyone else save your money for now.

[Petrina Polo]

Many of you are speaking with no experience of the N75J valve. Isnt it designed for higher boost applications where the stock valve is not?

I installed mine and the car runs fine. I dont notice any difference to performance but it might just control boost a little better.

I used one of those festo valve things and as your open and close the air tap, the boost adjusts with it. but never does it dump boost and go into limp mode. (N75J)

However, with the standard N75 if your play with the Festo valve beyond a certain level, it just dumps all boost and has no boost, just has a spazz attack.

Seems the N75J is more stable.

[brumue]

The following image is stolen from Plautos' thread about what he's done to his Pog.



I don't think you need to install in reverse (please correct me if I'm incorrect)

I am so confused... Is this the correct way around?

[noone]

That picture is correct for the stock unit. the J version has the electrical connections facing the other way.

[mikepologti]

I am so confused... Is this the correct way around?

can you report back , if you notice any changes , good or bad?

[brumue]

Noticable difference.

I think that it has smoothed out the power delivery and there might be a little more up top too. It's not a 'just chipped' feeling like I had read on some other forums but I think its a worthwhile little mod.

[noone]

That sounds like what i experienced (and hopefully said)

[mikepologti]

duh! looks like ill have to order one.......... and keep the other in my glove box

[noone]

I have one I used for a few kms, no longer needed.

If you are interested, PM me.

[fuzion]

duh! looks like ill have to order one.......... and keep the other in my glove box

there about $140-150 new