ptuomov

For now, that's the best place. Before I get the shifter wired, I will have to manually switch the boost program after gear shifts. The ashtray mount is ok for that.

Here's the longer-run solution:
* https://rennlist.com/forums/928-foru...st-at-wot.html I am planning to imitate Porken and use the 951 gauge that has both the boost and the tacho in the same gauge.
* micro switches under the shifter boot to drive the eboost2 boost program selection (allows for four different programs this way).
* Turbo speed will probably in the long run only go the data logs.

I bet you could! ;-)

AO

I think setting up the guages is one of the hardest parts of any boost project. Some like the ash try, some like the parcel tray, others like the a-pilar. I like the idea of the 951 tach, but you're still going to need something that give you AFR. In the short run, the ash tray will work, but as mentioned it does get hard to read not only becasue of the shifter getting it the way, but also it's really far down - can't use peripheral vision to drive.

In the long run, I like Hans' carputer solution, but it may still be too low.

Visually, the a-pillar and my center vent mount are probably the best solutions that allow you to drive with confidence.

Looking forward to hearing the final announcement.

ptuomov

Why do I need the AFR gauge visible after tuning has been done? For tuning, AFR gauge is necessary and AFR needs to be logged even after tuning, but I don't see a reason to have the gauge in there after the tuning is complete. I wouldn't notice it anyway if driving hard.

I am planning to set some audio alerts for a list of trouble events down the road. But that's longer term.

In general, I think gauges are overrated. Audio alerts and data logs are underrated. One could be adding gauges to the dash until blue in the face and it wouldn't make the car any safer.

I am sure I will now get flamed from left and right, go ahead with abandon, I am wearing nomex underwear!

AO

I have had several instances where the AFR has gone whacky. Just this past weekend, thing started going very lean. Had it not been for the AFR guage, I wouldn't have know. I've also had it go very rich.

In theory, the tune is a one-time event and you should be done after that. In practice, I have found it's a continual thing. I wouldn't be caught dead without the ability to monitor AFR on a modified car such as ours.

ptuomov

Why, what happened?

Wouldn't you agree that an audio alert would be better than AFR gauge without audio alert? If you get an alert, you can slow down and then afterwards look at the logs.

AO

WHen I get on the gas, the O2 adjust tries to lean out the mixture to the point where my AFR was in the 19's. Still don't know the cause - I suspect something with the O2 Sensor or the STer. I switched over to non-cat mode and the car runs great.

Will you be able to tell from an audio alert if it's rich or lean?

If I had Hans' carputer, I would not worry as much as long as I could pull up the soft guages or data log in an instant. But what you're proposing is that you'll have to download the logs or plug in a laptop. Sounds easy on the face, but it will get old fast. I think there are some guage that will allow you to cycle through the different paramters. I think the Innovate XD-19 does this. I have one and should know, but I don't.

Imo000

Is this your conclusion or John's?

Rob Edwards

How long 'til one of the sharper tools in the drawer here sneaks a HUD unit out of a C6 corvette and nestles it in front of the pod?

AO

I think Hans was asked that question at SITM and said it was doable with the carputer.

ptuomov

Which conclusion?

As far as the turbo system goes, if John has a strong opinion on something, that's the way it will be. He's the expert. I am just an amateur.

I am hesitant to quote John here, but this is my understanding of what he thinks: John feels that once his system is tuned, it's not necessary to have an AFR gauge. He doesn't think it hurts anyone to have one, but that once everything is ready and as it should be, it's not strictly necessary with his system.

ptuomov

My '06 M5 has that system and I love it.

AO

With the ducks you'll have invested in this system, I think it's short sighted (and maybe slightly arrogant) to say you don't need an AFR gauge. If it were my car, I would have one (actually, I do have one). It's too easy to have something go wrong, lean out, and kill the motor. With an AFR gauge, you will at least know what's happening. You don't look at it all the time, just occasionally. Like oil pressure and voltage.

But if John is willing to guarantee that nothing bad will happen due to AFR, maybe it's worth the risk of a $100 gauge.

But what if fuel pump doesn't deliver enough fuel and it leans out, you get on boost and burn the valves? You'll be down for at least a couple months. That's just one scenario. I'm sure we can come up with 20 more where if you had the AFR gauge, you'd have been better off.

If I were to sacrifice a gauge, it would be the boost gauge.

But as they say in Vegas, it's your money until the house takes it away.

BC

What the hell are you doing here talking about 928s if you an newer M5?

ptuomov

This is just my opinion, and not the only truth:

When tuning and developing, you of course need all sorts of gauges etc. But for the sake of argument, let's assume that the tuning and development are done and the car works.

If the car is working right, you only need the gauges that help you operate the vehicle. For malfunctions, warning lights and audio alerts are enough. This is how the car manufacturers do it, to a first approximation, so it can't be completely stupid starting point.

Price is not the issue here. It's the real estate and mind space.

I understand that for a belt-driven supercharger, boost gauge is less important -- you already have the tachometer. For a turbo system, boost gauge is beneficial because it will help you drive the car better. It's very useful to know whether the turbine is spooled or not, for example, when deciding whether it's beneficial to downshift.

ptuomov

I don't even drive the M5 during nice days like today. I took wifey's 2006 997 C2SC, top down and all.