cheetah chrome

what is the ratio between the boost gauge and psi of actual boost? what should an 87 951's stock max boost top out at? coming home this morning i was having fun spooling up the turbo and was maxing out at 1 and 1/2 divisions below the 2 bar line. i thought i read somewhere that the stock max boost level was around 1.6ish, although i maybe mistaken. i was told that the car is 100% stock (bought 2 months ago), could it be chipped?
ok last 951 newbie question....my 1st oil change.. im planning on using 100% synth mobil1 15w-50, ive read in previous posts that people use the 40 wieght version but i couldnt find it anywhere. anyone ever have any issues running heavier wieght synths, im assuming not (esp in summer months)? thanks all

vishal

1 bar = 14.5 psi

CS Mende

The highest-mileage car I've had luck putting full synthetic into and not developing leaks is 90K. Maybe I've been lucky -- I've heard recommendations on nothing older than 50K, but ya never know. Certainly take into account the condition of the vehicle...

Full synth does a good job cleaning out sludge which may have been preventing leaks previously.

I love synthetic oil, and have had great luck w/ Mobil 1 Tri-synthetic... 15w-50, I think it is.

toddk911

I have seen that Halvline has a high RPM/turbo non syn that is 20w-60. For those that run it real hard in the hot states.

cheetah chrome

1 bar= 14.5 psi? again today on the ride home i was watchin boost gauge and it tops out at a little over 1.8 bar at about 3500 rpms and holds until redline. how does that fare w/ everyone elses 951 (mine a stock 87 for now), sounds extremely high considering a 1bar to 14psi ratio. this is my 1st turbo charged car so enlighten me if im missing something.

eugene

The stock Boost gauge gives " absolute " pressure.

1 bar on the stock gauge is Normal atmospheric pressure( Zero Boost)

The actual " Boost " pressure is 0.8(1.8-1.0)

You are fine.