redrotaryrock8

car boosting to upto 1.05 kg/cm3. i know its bad, but it started happenening all of a sudden. and it all started after i put extra viscocity oil treatment into the oil. what do i do?

my mods are: down pipe, intake, catback, and power fc.

BoOsTin FD

When it was colder here in St. Louis, My car started spiking and boosting around 15psi. I don't know the weather temps in Boston, but if it gets colder it will spike.

rotarynemesis

I love driving my car in cold weather. It pulls so much harder. I dont have a boost gauge so I dont know if its spiking or not but my guess is its probably bad for the engne but damn its alot more fun to drive.

Kento

Unless you've got a separate oil tank for your MOP, if I were you, I'd dump that oil you just treated with the "viscosity improvers", and put in some fresh oil, preferably from a brand that is popular with rotary owners (Mobil 1, Castrol, RP, Motul, etc., you get the idea, do a search). Those "oil treatments" consist mostly of viscosity modifiers called polymers, which don't burn very well; remember that the rotary injects oil into the combustion chamber as part of its operation. You'll be leaving a lot more deposits on the rotor and possibly apex seals, which could result in problems down the road.

911GT2

I agree. If it was the oil treatment that made the issue happen, ditch the oil and put some new good stuff in there. Then very very carefully ease into the boost and if it's still too high, you need to find the source of the issue.

I can't imagine how the viscosity of the oil would affect your boost in any way, so it's probably safe to say that it isn't being cause by the oil, but you should get rid of it anyway. As Kento said, rotaries burn oil, so adding things that don't burn well is not a good idea. Ditch the oil, then chase your boost issue.

PhatManBUD

i thought oil flows into the turbos too?

911GT2

Well it does, but I can't imagine that adding a viscosity booster would affect it that much that the turbos would spin uncrontrollably faster to the point that you'd have severe boost spikes. If it did, wouldn't we all use that instead of adding an exhaust and intake to speed spool-up time?

Kento

Those "oil treatments" will do nothing for your turbos. The boost spiking is due to the colder ambient temps, or some other issue with the turbos.

911GT2