Plugs look on the lean side, except for the 3rd one which is closer to what the rest should look like/tan. The others are white. If your running an aftermarket ems, then its quite possible provisions could have been made to hit a limiter if a particular threshold has been reached for safety.

 

Its the haltech tune I beleive. Im running a haltech and my tuner has also placed a rev limiter setting against coolant temperature. So the hotter the coolant gets, the lower my rev limiter gets to protect the engine. You can ask your tuner to remove it.

 

Plugs looks a bit worn and gapped too wide. New plugs maybe worth a try.

 

That does sound like what I am experiencing. As stated before I will contact my tuner to see if that is the case. Thanks for confirming my suspicions.

I have ~5-7k miles on them, I will use them til next year before I consider swapping for a new set. Thanks for your observation, I will check the gap to make sure that's all good.

 

I had this exact same issue 3 months ago but haven't been on track since. I also have Haltech so I bet that's the issue. Where in the program is that setting to remove/modify?

 

I too think its in your tune. I had a Haltech as well and remember seeing that the rev limit can be mapped versus coolant temp. This shouldn't be necessary as long as your timing and fuel maps are done correctly to keep you safe at higher engine temps, but its probably something the tuner put in as an extra precaution.

 

Agreed, this is a safety measure implemented by the haltech. Maybe it is time for a radiator upgrade to keep coolant temps in check on hot track days.

 

run on track with the heater set on the hottest setting but the blower off. this should keep the car cool enough. just point the vents out the window so you dont overheat yourself too much lol. you can also change the settings yourself. just plug into the haltech and it will be under the rev limits on the left side of the main screen. i adjusted mine in there.

the haltech also rounds out the curve. For example, if you are set to 9k limit for 175* and the next setting is 8.5k at 215*. the space between 175 and 215 will be a liniar drop in rpm. wont be a 500 cut once you hit 215.

you can also set up protection too. I have my haltech setup to put the car into limp mode if the ect get above 225*.

 

Thanks for all the replies, I will check out the software and see for myself before I head to the tuner to see if I can skip the trip but,

I'm entertaining the idea of getting a better radiator, the protection is nice to have just in case and if the radiator does it's job well then the safety measure wont happen as often or at all.

 

I would think it would be extremely rare for your coolant temps to get anywhere near a dangerous level on the tracks unless you have some sort of problem with your car. Many of us run in Southern California, with 110 degree ambient temps, and stock cooling systems, and never have an issue with the car overheating. Oil temps get hot, but never above 300.