Tuners look here (VAST, EPL, DIY's, etc), questions in regards to boost control

[NOTORIOUS VR]

I've been talking to a few guys in regards to ECU boost control which I will be adding to a few cars I've tuned (turbo E30, turbo VR6) on standalone.

Anyway, I've been trying to decide which solenoid to use for these cars and was leaning towards the N75 valves (readily available). When I suggested it, it was shot down instantly (along with any other OEM valve) because "they don't ever close 100%" which will cause lag and by replacing it with a valve like this:



usually results in an increase in spool of 500-700 rpm if the turbo is "laggy" enough (ie. a 500hp turbo on a 2L 4 cyl as an example).

So this got me thinking, with the bigger laggier setups being put on the 2.7's how many of you are really comfortable with PID/ME7 and would venture into something like this instead of the damned N75 that seems failure prone anyway. I know with EPL's new Fueling/MAF setup they're able to keep the PID system working properly even @ high boost levels.

The valve above is a direct knock off of the valves used by the "big boy" boost controllers like the AMS-1000, etc. So would it only be a matter of getting the PID right if you were to switch from the N75 to this style of valve?

[Tony@EPL]

I've been talking to a few guys in regards to ECU boost control which I will be adding to a few cars I've tuned (turbo E30, turbo VR6) on standalone.

Anyway, I've been trying to decide which solenoid to use for these cars and was leaning towards the N75 valves (readily available). When I suggested it, it was shot down instantly (along with any other OEM valve) because "they don't ever close 100%" which will cause lag and by replacing it with a valve like this:



usually results in an increase in spool of 500-700 rpm if the turbo is "laggy" enough (ie. a 500hp turbo on a 2L 4 cyl as an example).

So this got me thinking, with the bigger laggier setups being put on the 2.7's how many of you are really comfortable with PID/ME7 and would venture into something like this instead of the damned N75 that seems failure prone anyway. I know with EPL's new Fueling/MAF setup they're able to keep the PID system working properly even @ high boost levels.

The valve above is a direct knock off of the valves used by the "big boy" boost controllers like the AMS-1000, etc. So would it only be a matter of getting the PID right if you were to switch from the N75 to this style of valve?

I have used this valve as well as the GM valve on vag applications.... Dont expect to find a magic 500-700 rpm spool increase, the stock N75 is actually very good, its just a little "fragile" from a longevity prospective.

[NOTORIOUS VR]

I have used this valve as well as the GM valve on vag applications.... Dont expect to find a magic 500-700 rpm spool increase, the stock N75 is actually very good, its just a little "fragile" from a longevity prospective.

It was obviously just a rough example from one of the guys I spoke to.

That said, how did you like the valve? Was it pretty easy to get going in the ME7?

In my application (standalone) I will be starting to scratch, but I know there are quite a few maps in ME7 that are dependent on proper PID control of the WG.

Good to see that it's already been tried though. How did you come to try it in the first place if I may ask?

[infinkc]

i brought up this question long before but there was not much input, here is my original post.
http://www.audizine.com/forum/showth...pgraded-option

would this work for an n75 valve? upgraded option?
my wifes volvo has a bad boost control valve(basicly an n75 valve for our cars) I found that they offer an upgraded valve for volvos. Anyone see any reason this same valve wouldnt work on the audis? seems like the same plug also.

http://www.ipdusa.com/uploads/sku_files/13184_INST.PDF

found the valves here by themselves
http://airinc.thomasnet.com/item/air...12vdc?&seo=110
anyone know the frequency which the n75 operates at?