Some of you guys are wrong... real wrong
EGT is worthless, it tells you how hott you are... thats it. What makes it worse, is it tells you how hot you WERE 2 seconds ago... Its like "Hey, you hit 1680*F back there... oh and by the way, your #4 piston is melted.... " thats what they say. You cant tune reliably on an EGT guage, there are too many variables. I know too many people who have blown up supras, scoobies, RX7's and DSM's cuz their EGT's
SAID they were at an acceptable temperature... but something went wrong and dont know what happend
the GReddy "Wide Band" O2 guage is not wide band. its only a 4 wire sensor... its a "medium Band" at best, if not simply a "Narrow Band". In order to be a REAL UEGO Wideband guage, you need to have AT LEAST 5 wires, if not more. the GReddy "wide band" is a analog-style version of the Autometer A/F-Blinky-ricer guage. Narrowand only works on 0-1v and does not give you enough precision, there simply not enough steps between 0 and 1 volts to register an accurate A/F readin, unlike the 0-5v: there are 5 times as many steps and can give you a more accurate reading.
Its like the difference between a 12:1 reading and a 12.35:1 ratio, know what i mean?
A Blinky A/F guage is worthless... it basically just tells you "hey your rich" or "Hey, youre lean" but it doesnt say if your 11:1 rich or 12.5:1 rich... get what im sayin? half-a-point makes a HUGE difference.
Ryde has got a handle on things, especially when it comes to FC's: one of THE most important aspects of monitoring a Rotary is the coolant temp. If they get too hot, even ONCE, youre toast and need new O-rings.
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Originally posted by 99B16Si
id say boost, oil pressure, and egt are the most important. unless youre using a wideband an A/F gauge is worthless. and if your car is tuned then its even more worthless. most cars come factory with a speedo, tach, and water temp which are usually sufficient
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I would agree with Dave, Those are the gauges that I am going to be running..
youre gonna run a speedo, tach, and water temp guage? or your going to run boost, oil pressure and EGT?
Lets hear some input as to why youd select these guages over the others. I just put a GReddy 52mm 1.5Bar boost guage in my supra cuz my stocker is not even mechanical... its an electrical that is actuated by the Airflow signal from the ECU and is not accurate at ALL... the factory boost guage simply lets you know IF you are boosting, but not how MUCH... see my problem was, me smoking an LS1 camaro and my boost guage TELLING me i was running over 8psi.. when i put in my GReddy guage, it said i was only running ~0.5Bar.... and im like WTF, peice of shit stocker.
seriously...