What n75 should i use?

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I cant seem to find a solid answer on what n75 valve to go with. im getting some surging at part throttle so im going to see if you guys had any luck with a particular version. The motor is an 2003 AWP with a unitronic stage 2 flash, forge splitter valve, tip, 3" tbe, bigger smic and upgraded piping. So far i'm leaning towards the "J" valve. Or should i go with a MBC? Any response appreciated.

[PernellGTI]

I cant seem to find a solid answer on what n75 valve to go with. im getting some surging at part throttle so im going to see if you guys had any luck with a particular version. The motor is an 2003 AWP with a unitronic stage 2 flash, forge splitter valve, tip, 3" tbe, bigger smic and upgraded piping. So far i'm leaning towards the "J" valve. Or should i go with a MBC? Any response appreciated.

I personally didn't like any N75 but the original on my awp engine, they all gave me a horrible boost delivery under partial throttle. I ended up buying the forge unos and I can't complain, boost delivery is pretty smooth and I dont use the N75 at all anymore.

[Humb1e]

Wondering the same exact thing with the same set up! input anyone?

[Big_Tom]

the stock one. n75f germanautoparts.com has them for a decent price

[TooLFan46n2]

I had the best results using a J-valve with some minor wastegate adjustment. This cured all my 5&6th gear surging. Ultimately I ended up going MBC eventually.

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I had the best results using a J-valve with some minor wastegate adjustment. This cured all my 5&6th gear surging. Ultimately I ended up going MBC eventually.

ive tried to adjust my wastegate but the nuts are seized and just spins the whole shaft. i cant get the damn things loose

[viperius]

Hey I have a "K" N75 valve when my stock F took a dump. works great, a little aggressive but its rock solid. keeps boost in check. part # 034-906-283-K

I also have a 2003 AWP but only a stage 1+ unitronic tune.

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Hey I have a "K" N75 valve when my stock F took a dump. works great, a little aggressive but its rock solid. keeps boost in check. part # 034-906-283-K

I also have a 2003 AWP but only a stage 1+ unitronic tune.

ok thanks!

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Well I got the J valve and now I only boost to 10 psi. What's up with that?

[travis_gli]

ive tried to adjust my wastegate but the nuts are seized and just spins the whole shaft. i cant get the damn things loose

PB blast the sh!t out of it, keep spraying it then grab the shaft with a vice grips closest to the diaphragm housing itself this way you don't mess up needed threads, crank on the top nut with a PERFECT FITTING closed end wrench. If it doesn't budge throw some heat at it with a propane torch. Use a smaller flame and heat the nuts only.

In regards to N75's stick with the stock one is the best advice I can give yah.

Well I got the J valve and now I only boost to 10 psi. What's up with that?

Are you stock or running software? 10 PSI is a bit high for stock. Get rid of the sh!t J valve as a start and give the wastegate a few turns if you can get it loose.

[Big_Tom]

In regards to N75's stick with the stock one is the best advice I can give yah.

i told him this 25 days ago, and he goes out and gets the J valve now he only boost 10 psi

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I heard good and bad bout the j valve so I said f#ck it and bought it, my bad.

@travisgli
I'm running unitronic stg2

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Figured it out. I installed it wrong. Surging gone