UT Digital WUR or Brian Leask WUR???

[930_pit]

Good day!

I have an '87 930 which I am planning to upgrade the stock WUR. What would be better between the two WURs? I don't track the car and used only in streets.

Thanks!

[RarlyL8]

For me it would depend on what method of tuning you are more comfortable with, manual or digital.
I have seen no comparative data but have fiddled with both. The end result was similar. The digi-WUR has the potential to do a better job than the manual version. I have not been following the monster thread on it so don't know where they are in development.

[964 T #304]

It's like old school vs. new school. They both do what they are intended to do.

[cole930]

930-pit,

What Brian refers to as The Monster Thread is a long running thread about 2/3 of the way down this page titled Digital WUR. It actually contains a lot of information about both the Bl adjustable Wur and the new UT DWUR. On the last couple of pages you will find feedback from Chris Carrol of TurboKraft. Chris is the owner of TurboKraft and a very well respected tuner and engine builder with years of hands on 930 experience. He just finished tuning and dynoing a modified 930 using both the BL Adjustable WUR and the UT DWUR. Chris was kind enough to post dyno results as well as his professional opinion of both products. Very good stuff.

Cole

[9dreizig]

Well I have the digital WUR from Unwired tools.. I visited their facility on Monday ( was driving through Flagstaff) and had a chance to talk with Tom.. There is no comparison in my opinion when you factor in the flexibility and the coming upgrades. I love mine and am getting another one for my other turbo.. EASY to program, very reliable and you can absolutely taylor it to exactly your style of driving and upgrades

[Thierry25]

Originally Posted by 964 T #304

It's like old school vs. new school. They both do what they are intended to do.

This exactly my thinking too. Old school / new school

Adjustable BL WUR ( with RPM switch) can provide the same result than D-WUR. The D-WUR will allow a fine tuning and accurate result allong the RPM.

Adjustable WUR is more difficult to adjust ( very sensitive mechanical adjustment ) and can not provide the same accuracy. However it can help to adjust the AFR and after long mechanical adjsutment you can reach roughly the same results. It is costless, and there is no need of computer

Having said that, in both case, these devices allow to deal with control pressure in the same range ( from 4.5 to 2 bar). That said, D-WUR won't bring any additionnal power compare to the Adjustable WUR (+ RPM switch) .

There is other cost effective solution to deal with control pressure .

ELECTRONIC CIS fueling & BOOST control

[stup]

I am one of only a few that have worked with all set ups and one of few that have posted results(afr curve) also to prove!
Adjustable mech wur and the rpm switch can do an acceptable job but not perfect in my opinion.
Digiwur,worked with unwired for over a year and it has potential.

My current set up (frequency valve controlled by fuel controller),similar to thierrys present set up,911st and lite75's old set ups has proven to me that currently it is the best set up and BY FAR the easiest to tune!!,once fitted it only required 4 seperate settings to produce perfect fuel curve.

[911st]

Electronically manipulating Control Pressure and thus the AFR curve is a much more flexible, efficient, and accurate than trying to do so mechanically w add on's.

When I did my system 7 years ago using an Andial Frequency Valve and a custom driver we did not have the Digital WUR. However, they mostly accomplish the same thing.

I got about one point more fuel up top, faster throttle response, better gas mileage, and near perfect --cruse, preboost, & on boost AFR's.

[mark houghton]

Originally Posted by 964 T #304

It's like old school vs. new school. They both do what they are intended to do.

I'm really quite happy with my BL-WUR and being what some people may consider "old", I'm entitled to stick with the tried-and-true old school stuff.

Perhaps someday I'll venture into the digital world (I just last year got my first laptop computer, so am headed in the right direction), whether it's the D-WUR or the fuel controlled freq. valve I haven't decided. Or I'll just leave good enough alone for a street driven car that occasionally breaks the sound barrier.

[930_pit]

Thanks for all that replied!

I had my car since 2004 but honestly speaking, when I got my it, I had no idea about the car. I just like it because of it's looks. Whenever I feel that the car is not running as it used to, i just bring it to a shop. The mechanic would tell me what's wrong which honestly I didn't understand. He would tell me that he just needs to adjust the air fuel mixture coz I'm running rich or lean. As long as he fixes it, I am happy. But just recently, I joined the rennlist forum which is very helpful and started to learn a lot of things but not those technical ones. I read about the WUR's and what it can do. So I got very interested with this topic coz I believe that this is the problem with my car. I searched more on this topic till it led me to the pelican forum and read some discussions about the brian leask and UT digital WUR. Whichever between the 2 will be decided by my mechanic since he is the one going to install it. I would also ask him to read the topics here so we could decide between the 2. But honestly, I am leaning towards the digital WUR because there is still room for improvement in the future.

Kindly bear with me coz I am just learning. I really appreciate your suggestions and help.

Thanks again.

[911st]

Why do you think your WUR is going?

Another option might be to get with Brian. I think he knows someone that rebuilds them to stock or modified spec for a very reasonable price.

If you are mostly stock there is a lot that can be done to improve performance that dose not require any modification to the stock WUR.

Get the lowest restriction muffler you can live with, a K27-7200 turbo, make sure you are getting .8 to .85 bar boost, and dial in the ignition and AFR's for a great running 930.

If you want to spend more, short headers and an inter-cooler. It is when you start running 1 bar boost or turbos with large compressor wheels that the WUR issue must be addressed.

Still, the Digital WUR dose offer benifits, has a lot of promise, and is about the best idea to some along for 930's in the last 20 years.

[Ken911]

i have the bl adjustable wur I have been very happy with it so far. in a couple weeks I am moving up to 3.4l and 7.5cr. The digital one sounds good but my next move will be efi. been saving parts for about a year maybe this time next year i'll be ready. About the time the drivers side chain box starts leaking oil again.