overheating, fuel cutout issues?

[mojoyaris]

The engine is setup to run lean. I think it's the ECU doing it's bit.
after running the car hard, it just runs out of fuel. Kinda like vapour lock.
The car comes back to life. It's like the ECU and the fuel pump is not able to keep up with the flow that is needed when running at VVTI all the time.

[jkuchta]

Try water-wetter....I have it in mine, and I've done trackdays WFO in 2nd-4th gears with no problems...I've never seen water temps go above 190 in the track, even after a 25 min. session at the streets of willow spent almost entirely above 5,000rpm.

[CpKi1g3]

Originally Posted by mojoyaris

Been away for awhile.
The car runs between 4500 rpm and 6700 rpm constantly at the track.
With the stock thermostat it over heats after a 15 minute hard run on the track and since the car runs lean, it seems to not get enough fuel.

I installed the TRD thermostat and better radiator cap for pressure and although it doesn't overheat, it will cut out when running the car hard, turning the car hard etc.
Basically if I run it 8/10's to 9/10 speed this way it will cut off the fuel or there is fuel starvation.
When I let off the throttle and drive it slowly, it will go back to normal and I can run again, but not for long. I basically have to give it a cool down lap before running hard, but this can be a problem when I'm timing a lap or something.

On day to day driving there is no problem. Only when driving at a Solo 1, time attack or track day. Especially on smaller tighter courses where I'm doing hard 2 to 3rd gear shifts.


I've got a few months to figure this out before I decide to enter the car in the Targa or not.

I'm thinking about getting bigger fuel pump. redo the air fuel management mapping
and bigger/better injectors.

just take off the thermostat my friend did it on his supra and ran much cooler.

[mojoyaris]

Originally Posted by CpKi1g3

just take off the thermostat my friend did it on his supra and ran much cooler.

Overheating is not the issue anymore. Not with the TRD thermostat.
It's the fuel cutout. This should be fixed later on.

Thanks everyone for their input.