Alright, bear with me here...this might get a little bit dorky. I just installed a Prosport Performance electrical boost gauge in my car last weekend. I included the inline filter and used the supplied vacuum tubing connected to the factory BPV line. It works just fine, but reads -1 InHg with the gauge powered on and the engine off, and I am only getting 14psi peak boost in 3rd, 4th, and 5th gear. It is my understanding that I'm supposed to get 15 psi boost peak. I have been emailing someone at Prosport about this and they do not know what is wrong. Here comes the dorky part...what does your boost gauge read with the engine off? I am wondering if the atmospheric pressure of the area is lower as we are ~800ft above sea level, which translates into ~1/3psi which is ~.6 InHg. Thanks for the help all...
I forgot to mention, it is an 02 WRX and my only "power" mod is a Prodrive axleback. I'm not really concerned with the 14psi max boost, but what about the gauge reading -1 InHg without the engine on? Thanks.
Peak boost for your MY car is 13.61. You're fine. EDIT: and yeah, most gauges are calibrated to a specific pressure. If the gauge can't be recalibrated, you'll have to live with it reading just a tad low.
Bullwinkle, are you saying that my sender was calibrated at sea level and it's reading low because we are above sea level here or are you implying that the sender is no calibrated correctly and I'll have to live with it?
This should be the same Prosport electric gauge. Mine usually peaks at 14 or 15, but it does creep to 16 or 17 occasionally if I'm really on it. Who digs my custom mouting? At Idle: Car is off:
yeah I do too, but I haven't had time to work on it. Does anyone have an extra steerring wheel cowling laying around? A co-worker told me that he would use some fiberglass and mold in two gauge housings for me.
Well, there goes the theory about it reading low because we are above sea level here. Damn. Prosport offered to test my sender if I send it to them. I'm thinking that's the plan now unless there is some other reason anyone can explain the reading being off...
Well, really it doesn't matter. It is a good thing to look at, but it will not match up with the ecu. I guess i wouldn't worry about it and call it a day. My autometer is a touch on the low side of the center mark, and off about 2 psi over 20. Russ
mine is all over the place. It goes to like 20+ psi in forth. But the car is only putting out like 16.65
sometimes the needle can slip up. A friend of mine got a autometer mechanical boost gauge that read 2psi low. when the engine was off it read -2psi. at full boost it read 2psi under what full boost was. It sounds to me like you are in the same boat. -1inhg of and -1inhg from the correct full boost. You could see if it is under warranty or something. other wise just get used to it.
This is where I would tend to lean...readings are just off by one tick mark on the "low" side. I think I might try rewiring the sender prior to giving up as I currently have the wires for it running into the cabin.
Yes, gauges are typically calibrated at the factory. For that specific pressure. Yeah, this is also more common on lower quality and mechanical gauges. My Maddad v2 gauges are fairly accurate.
It's funny you mention the Maddad gauges...I had one of those about a year ago and I went through 2 senders/gauges trying to get it to read right and I eventually gave up and sent the thing back. They also seem to bear a striking similarity to the Prosport gauges...
ONE of them is MD. the other one is autometer or something similar. 2 is faster than 1 y0! Taras, do you mean you think you see your gauge hit 20, but when you datalog, you read 16ish off the ecu?
