3SGTE pinging??

[2JZR31]

Yeah well a 2JZ is designed to run on 100ron and 10psi but I ran 25 psi with 98 and it didn't ping with a stock ECU. So I think that its bullshit that this pings on stock boost and stock power on the same fuel with just 0.5 more CR. I am sure the auto does make the pinging worse as the engine is always loaded up exactly at the point where it pings the most, around 2500rpm. On gear changes your foot stays on the throttle which means boost spikes as the RPMs drop. That means pinging on gear changes. I think these factors make the autos ping more than a manual. In any case hot air and heat soak in the top mount intercooler have to be adding to the prob. Prob is that a better flowing cooler might also increase boost in addition to cooling the air which will be one step forward and one step back in terms of detonation. Going for a tune is always an expensive option and last resort IMO unless the stock ECU and be tuned.

Is there a way to check error codes on this? Sure it might be this dead sensor or that dead sensor, but without having known working spares its a bit hard to test?

The Caldina is a ST246, the engine has unpainted rocker covers. So its not a black top. I read somewhere that they had a black top. So I was wrong there. So can I adjust the base timing on this version?

Lets end any speculation about how good/bad the topmount is. I just installed my multimeter with temp probe before the TB. Now I look like a ricer with a big yellow "gauge" jammed under my wiper. Ambient temp is 28, yet the probe says 35 and I haven't even started the engine for 7 hours. Will report back after the drive home, but I don't expect much traffic on this trip.

[Rona]

Both times mine was on the dyno with the top mount it had IT 5-6 degrees Celsius above ambient.

[2JZR31]

That's not bad. Lets see if its the same on the road.

[2JZR31]

I had to abort the test as it was raining as my meter was jammed under my wipers :p However it does not look good. Even with the rain on the cooler it was still acting like a interwarmer (at least when cruising). All tests done with slow to moderate acceleration. No flooring it wiht high boost yet.

As soon as the car stopped moving at lights the temps shot up very fast. In about 30-60 seconds they are 25 above ambient (50deg). I didn't get stuck longer that 60 seconds so who knows how high they might have gone if I was stuck for 2 minutes, and there was no rain and it was a hot day. I will test this more but I think 80deg would not be out of the question. Remember this is idling. I am not sure how hot the air is coming out of the turbo at idle but I would guess its only a couple of degrees above ambient. I might test this too.

Ambient temp was 25. Once the engine warmed up intake temps were 7-10 deg higher than ambient within about 30 seconds of hitting 60km/h. Question is why were they not closer to 1-2 degrees higher? This is just driving slow with no boost.

So why does the temp go DOWN instantly when I drive off or even rev it in N? (this is before there would even be sufficient speed and time for ambient air to cool the intercooler). Shouldn't the turbo heat the air more when accelerating compared to idling?

Clearly the air coming from the turbo is COOLER than the intercooler after sitting at the lights (under light acceleration). Where is all the heat going? The relatively cooler air stream from the turbo can only be transferring the stored heat from the intercooler straight into the engine in the few seconds after accelerating from a stand still. This is also matches the time when the car pings the most, and is massively sluggish.

Testing is not complete, but the top mount does at first glance appear to be seriously shit for city driving. I remember the huge difference lower air temps made when trying to get my R31 up on the converter. So I think this interwarmer has to be hugely increasing lag off the mark., and the car is shit slow off the mark too.

Obviously when you floor it and the turbo is boosting, the air coming from the turbo will be HOT so it wont be able to cool the intercooler like when you take off slow. So what will happen to air intake temps when I do a full throttle start from when the intake temps are already 50+ at idle? Anyone want to make a prediction before I test it?