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Posted - Feb 01 2003 : 01:22:40 AM
I've searched the internet for as long as i can stand it and have found nothing (i know, i haven't searched long enough, heh) Anyway. I was wondering if anyone knew how or has a schematic for a Boost Gauge so i can messure manifold pressure in psi. Some of the better gauges also measure vacuum while the car isn't boosting but if its too much to ask for help on how to make a gauge that can measure both then i'll be happy w/ just measuring psi :-) ANY help at all would be appreciated. The only thing i know is i need some sort of pressure sensor, and that motorola make some. But that's probably irrelevant. Anyway, HELP! Thanks
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| 4 L A T E S T R E P L I E S (Newest First) |
| Aaron Cake |
Posted - Feb 02 2003 : 5:22:08 PM
I think that by the time you add up the cost of building your own, you will be very close to the cost of an aftermarket guage. Consider that you would need to buy the sender, get and program a PIC/microcontroller, build a display and driver circuit (lots of connections) and then calibrate the whole thing. Starts to become a pretty large project. 
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Posted - Feb 02 2003 : 12:26:40 PM
Well i kind of wanted to do this as a small project. I'm kind of new to electronics and whatnot and i was hoping it would be easier to get started by doing projects based around things i like (cars). I was also hoping to make a boost gauge with a digital read-out and i figure it would probably be cheaper to make one than to buy one because the digital ones end up being about $100+ . Also, i have '94 mitsu eclipse gsx and it has a stock boost gauge but i'm told that it is horribly innacurate and pointless so its always strongly suggested to buy and aftermarket boost gauge before altering boost levels. But no one has ever told me if the gauge is inaccurate because of the sensor that takes the reading or if its because of the fact that the gauge itself doesn't have many markings as far as precision. On top of that it doesn't read vac. Thanks though.
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| Aaron Cake |
Posted - Feb 01 2003 : 4:07:35 PM
There's really no "schematic" involved. The boost guage is simply a voltmeter connected to a boost sensor. It would be pretty easy to grab the boost sensor from a turbocharged car (such as the TII RX-7) and connect it to any old voltmeter and calibrate the dial face for boost. Really, there are a lot of aftermarket boost guages available, both mechanical and electrical. I use a mechanical AutoMeter boost guage in my car, but would not recommend it since I don't believe it is entirely accurate. Greddy, Apex'I and VDO make some excellant boost guages.
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Posted - Feb 01 2003 : 01:24:34 AM
excuse my spelling errors and poor grammar. Its very late and unfortunately i have a long day ahead of me tomorrow... oi
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