Right now Im running three isspro guages in the cubby below the heater controlls. Boost, EGT's and tranny temp. Im adding three more above the rearview. Fuel pressure, rail pressure, and one more. What would you guys suggest?

 

I would vote for oil pressure! Factory guage is a guestimate at best. I put in an Autometer. Heres a link to my post.

post

 

If your just looking to fill the hole I put in a oil temp gauge

 

I second oil pressure. The factory gauge is a reading that is based on the computer. Nowhere on these trucks is an oil pressure sending unit. Very simple to install. Just remove the 1/8 " npt pipe plug on top of the oil filter housing and screw in your line or sender. My factory gauge reads 40 psi all the time. My autometer reads between 28 psi at idle up to 70 psi at highway speeds when warm.

 

if your goona get twins you will need another boost guage!!!!!

 

There is an "oil pressure switch" in the block according to the service manual. The signal is just carried through the ECM and averaged/calculated. It's still going to read "0" if you have no oil pressure, so it's not like the factory gauge is useless.

 

oil pressure gage, with a low pressure warning light : BIG light. where you can see it

 

Ya? I should have the twins sometime next week if everything works out.

 

 

Second boost gauge or oil pressure. The factory is next to worthless as my factory gauge reads about 40 psi and the aftermarket gauge reads 65 just after start up. Amazing the two read about the same after about 20 minutes on the road when I drop to idle at a stop. The factory is a "if this condition then this reading". I suppose the factory gague reads zero if there is no pressure but what does it read with about 6 psi of pressure?:

L8r,..............dogger

 

oil pressure for sure

 

Is a second boost guage recommended for twins and if so what turbo is it reading the top or bottom?

 

Bottom Turbo.. It is reading drive pressure.. I am just learning on this so I may not be correct but Idealy you want say 25 psi boost and 50 psi boost drive pressure driving the big turbo.. It helps with tuning..

 

What else will I need with twins under the hood. Obviously a set of head studs, but other than that, what should I be ordering?

 

You'll need an upgraded cp3...