Originally Posted By: dave1251
Since you have your UOA thru Dyson. Have you received consultation from Dyson?
Yes I have, but sorry it is proprietary.
Quote:
The EJ engine's propensity for spun rod bearings is the reason many of us recommend Xw40 oils for these cars when used in anger. Slight misalignments in the bearings likely contribute. If your engine happens to be at the center of the tolerance range, count yourself lucky and raise a glass of 5w30.
From datalogging the car, I can tell you that it does have some knock to it on 93 octane, so there can be truth to detonation causing issues, but that's the point of the ECU to learn the knock and account for it. My goal is to get that timing back and maximize performance within a reasonable manner. (Spending $120 dollars on a tank of 100 octane is not reasonable! lol). But this is kinda the approach I'm taking with the car, maximize performance of car with experimenting with oil, fuel, fuel/additives, etc. And I've set myself within a box of what I can work in, because I would like to maintain my "Stock" classing.
Quote:
I wouldn't upgrade the radiator, I'd duct it to make sure any air that comes in the bumper has no choice but to pass trough the radiator. An out duct would be even more effective, but it's harder to make. Vented hood or fenders are the typical options. Venting a Subaru hood with the IC scoop in the way is tricky. The OEM radiator has plenty of cooling capacity to keep the engine cool at racetrack speeds, the problem is making sure enough air goes through it.
Upgrading the radiator would take me out of stock classing for some events, so it would be a last resort. I would prefer the cheaper routes, so good point about getting the duct. I can also run more water than antifreeze, so these are good cheap solutions to try but it probably wont do much. It seems the GR radiators are a bit of a downgrade compared to older models. There are threads on iwsti of other stock STI guys overheating on the track.
Quote:
With the seeming downgrade to PUP it's a conundrum. Maybe PPPP? Maybe Edge FST? If you want to stay with resource conserving 5w30 those seem the best options. Otherwise, M1 High Mileage, Motul X-Clean, or M1 ESP if you're willing to step up to a slightly thicker 5w30. I've got ESP in my WRX right now and there's a couple of really good UOAs over on NASIOC with it.
ESP is on my list of oils to use, it's a good one no-doubt. I actually have a stock pile of PPPP due to the shell fuel rewards. It's pretty much allowed me to get the oil for free all said and done after fuel discounts. I would take containers to shell, to fill after getting my tank maxed, so I would get the max 20 gallon discount. Plan is for PPPP to go into the RS, but it's got RLI oil. Waiting a bit before draining that liquid gold out. 10k~ mi OCI
