Anyone have info on PSI readings from their car? Supporting info such as test conditions, mileage, oil used would be icing on the cake.
Just did mine: 175-200PSI. WOT and with diverter valves disconnected. Surprisingly clean pistons (low to very low carbon buildup). Cold test soaked at 45-55F ambient. Battery charger used (auto selecting 40amp smart charger). 90K miles, fresh Amsoil 5/40 Euro EFM full SAPS. All spark plugs removed.
Happy with the results, and seems to coincide with the 9.8/1 compression ratio prett well.
OE PSI spec is 10-13 BAR new, with 7 BAR minimum (or about 100PSI which is the lower limit to >even< support combustion) which is a lame spec for the factory to publish-- but have seen this a lot in the last 10yrs as OEM's get away from providing any hard #'s.
The only thing that was sort of botched was accidental fuel contamination (fyi- the fuel pump relay must be removed, NOT just the fuel pump fuse. I've been learnt). Tried to dry out the cylinders with compressed air, and with all the cranking (testing and retesting to get stabil readings). Seemed to have recoated they cylinders with oil and restabilized the PSI readings. Makes a BIG differenc. Need to do the V/C's soon and will do a retest, but wanted some sort of a baseline....next time will do a warm or hot test as factory prescribed. I view a cold test better to pinpoint possible issues, however. An engine starts when it's cold, not warm/hot......
Hope to see some comparitive data.