93redFD

if you had a choice of 3 guages what would they be. Does anybody know what kind if you can mod an autometer air/fuel so it will work for turbo???

Scott 89t2

boost, EGT, water temp.

next would be fuel pressure, oil temp.

A/F is garbage.

RX7 RAGE

iTrader: (22)

ditto what scott said.

AJC13B

Boost
Oil pressure
Fuel pressure

93redFD

it look im going to get 4 guages.

vmb

where do you tap to get fuel pressure?

wptrx7

stupid question: whats the difference between oil press and oil temp? reason i am asking is because why would you choose one over the other?

luigi

RX794

If you mean adding guages to the ones that already come with the stock dash, I'd say boost, egt, and fuel pressure.

Kurgan

You don't tap for fuel pressure, you put a sender inline with the fuel system. If you have an aftermarket fuel pressure regulator, you should be able to just screw one into the front of that. if not, you should put it after the secondary fuel rail.

Differnece between oil temp and pressure? Um, one measures your oil temp and the other measures the pressure. What you can tell from these readings is different. The oil pressure is pretty vital because you engine can die from oil starvation with low oil pressure. Keeping an eye on that will keep you semi-safe. Oil temp can be used to determine the cooling abilites of your oil cooling unit, and in turn, your water cooling system. If the temps are too high, you need to either route ducting to the oil cooler, replace the oil cooler with a larger unit, or look at the effeciency of your water cooling system.... maybe all 3.

wptrx7

that was agreat description and exactly what i was looking for. thanx. would you get any of these gauges ove another? and i know a lot of people think tht having so many gauges gives you that ricey look but i think its better to look at than, lets say my power fc screen.

luigi

from what i understand:
boost
egt
water temp
fuel press
oil temp
oil pressure

optional:
knock sensor
a/f ratio

AJC13B

Why are you guys so keen on EGTs?

I got my gauge just for **** factor If your tune is right, you don't need to worry about EGTs.

Boost - Its obvious why you need it.
Oil pres - You lose oil pressure and its time for a rebuild.
Fuel pres - If you lose this and your up it, time for a rebuild.

RonKMiller

I gotta weigh in here and say the heck with EGT, oil temp and water temp. Why? They are all "after the fact".

For lack of a better term, "rotor head temp" is what we're really after, 'cause that's where it all starts.

I've adapted a "cylinder head temperature gauge" to my engine: it's as simple as installing a couple of loops under the leading spark plugs (of course after removing the plug washers in order to maintain the "correct" distance.

I will always know way in advance when things START to get uncomfortably hot, instead of waiting for everything downstream to react, which is usually too late.

Here's the gauge:

RonKMiller

Yep, EGT is only good for tuning, but really, the only way to do it right is with a wide band.

wptrx7

got another question:

mechanical or electrical, which is better?

when considering a water temp gauge, which one, 140f-280f or 120f-240f?

same with oil temp?

and with fuel press gauge is it necesary to mount it outside of the car?

and is an intake temp gauge worth it?

luigi

wptrx7

quiz time: anyone know the answer to the above question?

luigi

hondah8er

you only have to mount the fuel pressure outside the car if its mechanical. Electrical ones also cost about 5 times more

93redFD

is fuel pressure defi d gauge mechanical??? i dont like the look of mounting the guage on the hood. i also dont want to spend 280 for a gauge either.

wptrx7

so what does everyone have mechanical or electrical gauges? which is better to go with?

luigi

wptrx7

anyone have an answer? mechanical or electrical?

luigi

Morbius

Im going with electrical due to the fact ive seen oil leak all over the interior with a mechanical pressure gauge. Other than that I dont think it matters which you choose.

-Morbius

wptrx7

hey thanx, thats all i needed to hear.

luigi

chris_stampe

hey, you can use a mechanical fuel pressure gauge inside the car. You just buy a 20$ isolator. They have em in summit and everywhere else you buy gauges. Alot cheaper than going electrical.

wptrx7

hey thanx.

luigi

half past twelve

-tire pressure guage
-neon wattage gauge
-gas guage

AJatx

iTrader: (1)

luigi, getting a gauge for say coolant temp which shows over 240F is kind of a moot point. If you are running hard and you're over 225F on coolant, then you're pretty much in the red zone or could be frying your water jacket o-ring seals.

I like mechanical since:
a) it's cheaper
b) it's mechanical!! (reliable)

I never had a leak of oil with my oil pressure gauge with my old FC. Just route it such that the line won't kink nor get hit by your foot.

J