Ok, I am going to install a vacuum gauge on my 91 Camaro, and I have a REALLY STUPID QUESTION!

What is involved in hooking this up? Just a hose from the TB to the gauge, and an electrically hot wire if I want it to light up after dark? Doesnt the car have a vacuum sending unit? (Speed density TBI....)

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Can I install one of these and then tap into the wire that goes from the vacuum sending unit to the computer?

 

The electrical signal from the MAP sensor isn't necessarily compatible with what the gauge expects.

 

Then would I be better off with a non electrical?

I have heard those are not drag race legal.

The only sending unit i found is $64 dollars, way out of my price range....

 

A mechanical gauge will probably be cheaper. There are no racing legality problems.

 

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So this would suit my needs? Just plug a vacuum line into the back?

 

Something like that should be fine.

 

Your awesome, thanks for your help.

One last stupid question, I just take a vacuum line from the engine to the gauge?

 

Pretty much, the gauge probably comes with tubing, you'll just need to adapt it to a convenient vacuum source.

 

Thanks!