8AR engine internals look
#61
Intermediate
Our engine does not run both DI and PI at all times. In fact, the most I could get out of Toyota was that the Port Injection is engaged when low load and during "cleaning cycles". They would never say the exact time or parameters for when DI or PI or both were used, stating proprietory information.
I was more interested in the fact that the lack of fuel on the valve to cool it helps to create even more carbon.
I was more interested in the fact that the lack of fuel on the valve to cool it helps to create even more carbon.
#63
Intermediate
#64
Driver
iTrader: (1)
But just the PCV for now, have not had time to add the others.
My thread I started on OCCs (only have OCC on point 1):
https://www.clublexus.com/forums/is-...catch-can.html
pnoygil had OCCs on his IS200t was totaled.
https://www.clublexus.com/forums/per...-tune-220.html
Collected 1/2 oz oil/water... PCV Valve to intake manifold
Collected 1/2 oz oil/water ... Only did one hose from the valve cover since the other one I didn’t see any sigh of oil inside the hose
Update:
Catch can set up better get one asap, for just having it one week in my car it has already have 1/2 once oil/water in the catch can... forgot to take pictures when I cleaned it but i took some pictures how i put on...
#65
Since this was all taken apart. For the intercooler where does the coolant flow? Is there a heat exchanger front mount to cool the coolant back down or does if flow straight from the intercooler back to the reservoir tank?
Edit: Nevermind I'm pretty sure it uses the engine radiator which is dumb if so. I know you can purchase front mount heat exchangers to flow the intercooler coolant that way. Also, here is a cool website that has diagrams for the 8AR
https://toyota-club.net/files/faq/16...engine_eng.htm
Edit: Nevermind I'm pretty sure it uses the engine radiator which is dumb if so. I know you can purchase front mount heat exchangers to flow the intercooler coolant that way. Also, here is a cool website that has diagrams for the 8AR
https://toyota-club.net/files/faq/16...engine_eng.htm
Last edited by DiverseIS; 08-31-19 at 12:09 PM.
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DiverseIS (08-31-19)
#67
#69
Heatskoke issues for track purposes. I have an IS200t and I know there are larger heat exchangers. I was mainly just curious if it would help IAT's.
#70
Lead Lap
Thread Starter
IAT's get pretty high when you start pushing the motor. Last time was I at the track the radiator was heat soaking the intake air quite a bit. My water meth system would bring it back down about 50 degrees but it would still be hot
#72
Lead Lap
Thread Starter
I don't think saying "that's extreme usage so invalid" gets the NX off the hook. We can all agree (hopefully) that the turbo on this car is undersized. It is undersized for stock usage. If you want to see how small your turbo is, watch your PSI numbers next time you take the engine to redline. They will drop as you pass 4800-5000rpms. They drop all the way down to 12psi. That is not programming, that is an engine asking for more air then the turbo can supply. An overworked turbo creates large amounts of heat. Pair that with a undersized water to air intercooler and you will eventually get heat soak on the cooling system. I have reached heat soak from 2 quarter mile pulls at the track. That is not extreme usage, that's like getting on the highway from a stop twice. This is why water/meth injection was my very first mod and also a big reason I have not bought the OV tune. Why buy a tune that will turn up boost on a turbo that is maxed out at factory specs.
#73
Racer
iTrader: (6)
I don't think saying "that's extreme usage so invalid" gets the NX off the hook. We can all agree (hopefully) that the turbo on this car is undersized. It is undersized for stock usage. If you want to see how small your turbo is, watch your PSI numbers next time you take the engine to redline. They will drop as you pass 4800-5000rpms. They drop all the way down to 12psi. That is not programming, that is an engine asking for more air then the turbo can supply. An overworked turbo creates large amounts of heat. Pair that with a undersized water to air intercooler and you will eventually get heat soak on the cooling system. I have reached heat soak from 2 quarter mile pulls at the track. That is not extreme usage, that's like getting on the highway from a stop twice. This is why water/meth injection was my very first mod and also a big reason I have not bought the OV tune. Why buy a tune that will turn up boost on a turbo that is maxed out at factory specs.
#75
Racer
iTrader: (6)
I believe you, but for the majority of people on here, so what if IATS are a bit high? Most of us using the car to get from point A to point B will not notice or be affected by that. I'm sure Toyota had their reasons for doing what they did, cost/efficiency is where i would put my money. I just never think of the nx as a fast or performance car, nor do i think that was its design purpose and I don't think i would spend a lot of money trying to "fix" the issues. For example a 335i or ford taurus can get huge gains with just a little bit of tuning, not something worthwhile in the nx to get a bit more power when the turbo will sputter out anyway.