Do you want an inexpensive increase in I5 20Vt power and refinement ?

[Henkjan]

Does not work right with stock ecu. Power WILL drop.
I think it is possibly due to the different port/restrictor sizes.

thanks

it's been on my car for some time now, it was an improvement over the old one though.. so better to buy a new one then from the stealer

[Giacomo]

Afternoon Dimitri, good to see you're still lurking.


Thanks for you comments, very much appreciate your 'always informative' input on here.

Additionally, I'm sure I'm not the only one who enjoys your succinct posts.

Kind regards.

[Giacomo]

and what about the metal Forge one?

[ericd]

Eric, do you happen to know what the difference is between the two - N & P ?

More durable, or better performance, or both ?

Just curious, now I've fitted a new 710N.

i believe its supposed to have subtle internal changes to make it more robust and its operating specs have been tweaked

[teamplatto]

Wow

[macspring]

Realistically, and tbh, I am very happy with my new 710N, so won't be looking to change.

Car pulls strong, within the realms of it's spec, and the laws of physics as Dimitri says.

The improvements were not massive in terms of the overall bhp, but definitely noticeable when you drive it everyday, and are obsessed. I feel I have a good butt dyno.

Obviously it was not running as well as now over the last couple of months, but I didn't fully appreciate that, apart from the obvious and annoying hesitation fault caused by the coil which couldn't keep up under decent throttle load.

[UrS4boy]

By-pass valve info

Some BPV info including 710N = the best at the time. Not sure what a 710P would be from. The 710N was from the 225 hp TT (IIRC). Bosch sold the tooling to KAYSER so there are no more Bosch 710Ns. Not sure about the 710P.

BPV info:

http://forums.quattroworld.com/s4s6/msgs/20994.phtml

[macspring]

Eric, do you happen to know what the difference is between the two - N & P ?

More durable, or better performance, or both ?

Just curious, now I've fitted a new 710N.

[ericd]

seen recent info that 710N is being superseded by 710P, just i case ur looking for the original....

[Michael S2]

Interesting read.
Been meaning to fit my new ABY valve for a few months. My car pulls well but everything I've read on the forum suggests these deteriorate over time. Anything for a bit more pull and keeping it OE.

[Vorsprung durch Technik]

Does not matter stock or not, I have the stock valve working with pressures of over 2.5 bar and I have not had any issues.

Their usable life is about 8-10 years. Around that time they start to fail...
I find it funny how people replace them with aftermarket stuff, because usually the aftermarket stuff hasn't even been around that long, and it's not proven it's better at all.

So just get a new N75 in and forget the issue.

"Their usable life is about 8-10 years." Thanks for that and good to know they are more than adequate of 2.5 bar and over.

[prj]

Audi have spent a lot of money on research, so OEM should be plenty enough if engine is kept stock, so I agree with you on that.

Does not matter stock or not, I have the stock valve working with pressures of over 2.5 bar and I have not had any issues. We have fitted them on some jap cars we have tuned on both stock and aftermarket management, and find the N75 works much better than the stuff the jap cars come from the factory with.

Their usable life is about 8-10 years. Around that time they start to fail...
I find it funny how people replace them with aftermarket stuff, because usually the aftermarket stuff hasn't even been around that long, and it's not proven it's better at all.

So just get a new N75 in and forget the issue.

[hunker7]

Thanks for letting us know.I was actually thinking of considering it.Cheers!

I guess you cannot beat original as is usually always the case despite frailty issues that throw themselves up once these items get old.Still new OEM should give us 10 years good service...Yes?

Audi have spent a lot of money on research, so OEM should be plenty enough if engine is kept stock, so I agree with you on that.

[Vorsprung durch Technik]

Does not work right with stock ecu. Power WILL drop.
I think it is possibly due to the different port/restrictor sizes.

Thanks for letting us know.I was actually thinking of considering it.Cheers!

I guess you cannot beat original as is usually always the case despite frailty issues that throw themselves up once these items get old.Still new OEM should give us 10 years good service...Yes?

[prj]

This is all very interesting especially that last comment.Whats wrong with it Dimitri? Why is it a bad idea?

Does not work right with stock ecu. Power WILL drop.
I think it is possibly due to the different port/restrictor sizes.