Boost Pressure Sender

[MikeD930]

I have a question for those of you who ditched a stock 930 intercooler, intake manifold and boost pressure sender. Are there any non-stock boost sender that would work with a stock boost pressure gauge in the RPM cluster? I do have a mechanical VDO boost pressure gauge in place of a stock clock. I want a stock pressure gauge to be functional rather than seeing it pegged with engine running.

[flightlead404]

Obviously there are a multitude of changes, but at least for many when changing out the interfooler there is typically a boss for the sensor on the new interfooler somewhere. Certainly that is true with the TK units.

[Tippy]

Originally Posted by MikeD930

I have a question for those of you who ditched a stock 930 intercooler, intake manifold and boost pressure sender. Are there any non-stock boost sender that would work with a stock boost pressure gauge in the RPM cluster? I do have a mechanical VDO boost pressure gauge in place of a stock clock. I want a stock pressure gauge to be functional rather than seeing it pegged with engine running.

Can't you keep the boost pressure sender and reuse on the new system?

[MikeD930]

My car was already heavily modified when I bought this car 16 years ago. There's no provision for a stock type boost pressure sender. I don't really need it...thought it'd be nice to have a working stock boost gauge even though it may be inaccurate. I was hoping to find a small simple boost pressure sender to tee it to one of the boost/vacuum line.

[mark houghton]

Originally Posted by flightlead404

Obviously there are a multitude of changes, but at least for many when changing out the interfooler there is typically a boss for the sensor on the new interfooler somewhere. Certainly that is true with the TK units.

What the heck is an interfooler? I must get one! Heh heh...

[mark houghton]

Originally Posted by MikeD930

I have a question for those of you who ditched a stock 930 intercooler, intake manifold and boost pressure sender. Are there any non-stock boost sender that would work with a stock boost pressure gauge in the RPM cluster? I do have a mechanical VDO boost pressure gauge in place of a stock clock. I want a stock pressure gauge to be functional rather than seeing it pegged with engine running.

So what you're saying is that your stock gauge is pegged, which points to the stock boost sender unit. Check your ground at the sender, that's usually the culprit.
I don't imagine you'll find some after market sender that will work with the stock gauge. Would need to have the correct internal resistance for the gauge to be accurate.

[Phony930]

Related but different question — if there are any other sensors that work, is there any way to get the stock gauge to read more accurately? Mine is wildly inaccurate compared to my aftermarket boost gauge, it’s definitely for looks only.

[kamaro]

Exactly that. I, too suffer from the stupid stock boost gauge, it reads way less than actual boost.

Originally Posted by Phony930

Related but different question — if there are any other sensors that work, is there any way to get the stock gauge to read more accurately? Mine is wildly inaccurate compared to my aftermarket boost gauge, it’s definitely for looks only.

[MikeD930]

Originally Posted by mark houghton

So what you're saying is that your stock gauge is pegged, which points to the stock boost sender unit. Check your ground at the sender, that's usually the culprit.
I don't imagine you'll find some after market sender that will work with the stock gauge. Would need to have the correct internal resistance for the gauge to be accurate.

As I said before...my car does not have any provision for a stock boost pressure sender since all stock 930 intake and intercooler were replaced by 3.2 Carrera intake manifold and custom intercooler as part of the Protomotive Stage 3 turbo kit (changed from CIS to EFI, headers and upgraded turbo among other things) that was completed back in 2002.

Originally Posted by Phony930

Related but different question — if there are any other sensors that work, is there any way to get the stock gauge to read more accurately? Mine is wildly inaccurate compared to my aftermarket boost gauge, it’s definitely for looks only.

I wonder if there's any sensor without having to use a huge stock threads and is smaller in overall size. Since you have both boost gauges...do you think it's worth to make a stock boost gauge functional or not?

Originally Posted by kamaro

Exactly that. I, too suffer from the stupid stock boost gauge, it reads way less than actual boost.

That's unfortunate for those who upped the boost!

[mark houghton]

Mike,
You would have to weld a port somewhere on the IC or intake manifold to install the stock sender. Where are you getting the boost signal for your mechanical gauge? Perhaps you can rig a connection there.
To un-peg your stock gauge, you would have to find the single wire that normally goes to the stock sender...and ground it. That should return the gauge to zero.

As for any old after market sender that would work with the stock gauge, that's a long shot since most all electrical gauges...be they boost or oil pressure, etc. come as a calibrated set. The senders have an operating "curve" whereby the internal resistance changes/increases as pressure builds and the gauge reacts accordingly.