[awdnut]

Installed the boost gauge this afternoon (wiring not fully sorted) and took a couple of run later on.

First run at 92F ambient, max boost was about 1 bar

Second run this evening at 63F ambient, max boost was more than 1.1bar

What is the actual max boost on stock car? I thought it is 1.0bar

BTW anybody have a good idea where to tap for "ignition on" and "light on" in the left dashboard area (for the boost gauge wiring)

Thanks,
Awdnut

 

[KMK454]

Re: Stock max boost (awdnut)

Everything I've heard says about 14.7 PSI stock boost (1 bar). Not sure though.

Gauge looks great, what type and where did you get it? Also, how did you install it? Please explain, I'd love to do one myself.

 

[awdnut]

Re: Stock max boost (KMK454)

Its a Defi BF gauge. Nice thing is that you can set the max boost warning, recall peak boost and record a run.

I cannot find a hole to get the wire from the engine thru the firewall so ended running the wire from the side coming thru the left front door wiring below the a-pillar.

I still need to find a ignition on source and a light on source though.

Awdnut

 

[KMK454]

Re: Stock max boost (awdnut)

So is it a wiring thing for the boost reading, or do you have to run a hose or something into the engine bay? I'm guessing you ran the sensor through the fuse opening on the driver side door into wherever it had to go then...?

 

[awdnut]

Re: Stock max boost (KMK454)

It is an electronic boost gauge, so the sensor stays in the engine bay and you simply run a thin electrical wire into the dashboard area.

http://www.defi-shop.com/product/bf/bf_top.html

 

[mike_c70]

Re: Stock max boost (awdnut)

Sweet! Where did you put the control unit?

 

[awdnut]

Re: Stock max boost (mike_c70)

The Defi control unit is located next to the OBD2 port

 

[R Kelly]

Re: Stock max boost (KMK454)

Here is an example of another install I think....

http://www.ss.otheron.com/rkel...s.wmv

 

[JimLill]

Re: Stock max boost ("R" Kelly)

There's transient and quasi-steady state levels.... the former will be higher.

 

[awdnut]

Re: Stock max boost (JimLill)

Jim:

Initially I set the warning boost level to 1.05bar (since I thought the max boost was 1bar). During the second run (at lower ambient), I was WOT on 3rd and 4th, and on both cases the boost warning light and buzzer on the Defi gauge was on all the time which seem to indicate that all during WOT, the boost was more than 1.05bar (warning level) that I set earlier.

I am currently resetting the warning level on Defi to 1.15bar.

R Kelly:

That install on the center headliner location is sweet but harder too see during driving though

 

[JimLill]

Re: Stock max boost (awdnut)

I think stock is more like 1.1

 

[rdalcanto]

How much do you have to push the throttle before you are getting boost (thinking about cool down period before shut down).

Thanks,
Rick

 

[Our R]

Re: Stock max boost (awdnut)

On my 2004 I used the 12V outlet as a power source, it's switched. As for a "lights on" source, run a wire to a rear tail light.

 

[TurboR850]

boost spike . . . .

 

[awdnut]

Re: Stock max boost (Our R)

Thanks, Lee

I'll try the 12V outlet.

The light on output is not that important since it is only used for dimming by the Defi gauge.
Can't use the rear light output since the parking light on our car is always on AFAIK. I might have to set-up a relay that is triggered by the DRL so that if the DRL is off the relay will give a 12V output and vice versa.

TurboR850:

Like I said earlier, I was looking at the gauge during WOT and did not notice the spike/overboost condition. It was staying at 1.1bar during the WOT at 3rd and 4th gear

Modified by awdnut at 4:49 PM 5-22-2005

 

[SilverS60RNYC]

Re: Stock max boost (awdnut)

Quote, originally posted by awdnut »

Thanks, Lee I'll try the 12V outlet. The light on output is not that important since it is only used for dimming by the Defi gauge. TurboR850: Like I said earlier, I was looking at the gauge during WOT and did not notice the spike/overboost condition. It was staying at 1.1bar during the WOT at 3rd and 4th gear

on my dakota digital gauge, i see spikes up to about 16PSI or 1.10 BAR that level off to 14.5 PSI (stock ecu programming)
with tuning loaded, i see spikes to 1.5 BAR with sustained at about 1.35 BAR

it depends on how fast your gauge reacts.

 

[KMK454]

Re: Stock max boost (SilverS60RNYC)

Sorry for more questions, but how much did the setup cost? And what exactly did you buy, and where from? I'd really like to do one for diagnostic purposes, and your setup looks very cool. I like the positioning, and the gauge looks nice.

 

[JimLill]

Re: Stock max boost (KMK454)

Place to tap into vacuum/boost is under the green dot. The black hose gets lost in light

 

[awdnut]

Re: Stock max boost (KMK454)

Kurt:

The Defi gauge cost me $100 for the control unit and $205 for the boost gauge. For the boost sensor, I tapped the rubber line between the intake manifold to the waste gate actuator. The sensor itself is located next to the fuse box in the engine compartment.

If your diagnostic need do not mind not having the peak, warn mode and recording you can get just a mechanical boost gauge. There are also more economical electronic boost gauges made by Apex, Greddy or Blitz etc.

I like the Defi BF since I might later on add the EGT (exhaust temp) gauge to the control unit

HTH,
Awdnut

 

[JimLill]

Re: Stock max boost (awdnut)

Quote, originally posted by awdnut »

I tapped the rubber line between the intake manifold to the waste gate actuator.

The place you tapped is actually the intake to CBV hose.