I have upgraded my FD, it now has about 350hp I have boost and A/f guages. In order what are the most important guages to get? Not for looks but what is really need so car will run safe.

 

water temp, fd easy to get over heat
oil temp+oil press next
if you really want to play safe... get WB o2 gauge
and exh temp

i think

 

This is just a general list of gauges - I'm including the stock gauges in their relevant postions:

water temp
rev-counter
oil temp + pressure
boost
fuel level
voltage
speedo

that's all i can think of right now

 

EGT (exhaust gas temperature) is a handy one to have as well.
I'd throw in a Fuel Pressure gauge too since they are so cheap and easy to install.

 

use the EGT and toss the A/F, if it's one of those digital autometer jobbies then they don't really tell you anything except that your ECU is working. ( unless your way way out. )

 

wb02
wide band o2
not the stock o2!!!!

 

the most important gauges are (in order)....

boost
water temp - if you have a PFC you dont need a wt gauge
wideband
egt
fuel pressure
oil temp/pressure - I dont rank this one high cause my stock pressure gauge works fine. Obviously if yours doesnt work you need to replace it.

 

what does the wide band do?

 

same same like this one'
http://www.microtechefi.com/product.asp?ProdID=8'
like a/f gauge but tell you the real a/f
not like the $30 a/f gauge that hook up to your old/stock o2 sensor.