I've got a single turbo T04R setup with worn Sumitomo tires.

Sooo I took the 7 out the other night. It took a while to get to operating temperature as you'd expect. I pull out and make a right on to a two lane road, then give it about 1/8 throttle in 2nd. Almost immediately I hear a pop sound. Yup, PFC fuel cut even though I had already turned my boost control duty cycle down. I have my PFC set to fuel cut if it runs more than .5psi more than normal. So I turn the PFC boost controller down and give it about 1/4 throttle after making a right at a traffic light.

Sideways... in 2nd... from a roll... at 1/4 throttle.

After hitting about 60mph in a 45mph zone, I hit the brakes--only the feel the back end get loose because the tires won't stick. Frustrated, I decide to head back to the garage after about five minutes of cruising.

But first I do a 3rd gear pull, which did in fact hold traction. Just call me a Supra owner.

 

I just took the FD out for a freeway run and obliterated a Cayman S. Lovin this cold snap.

 

Back in April (warmer weather) I was running 15psi on my setup with 11.5 AFR's...ran brilliantly. Made 337rwhp on a Mustang Dyno.

When I just went home for New Year's where it was between 15-25 degrees outside....not such a good idea. Popped the motor over New Years weekend. Many lessons learned.

I'm gonna tune the next motor for 13psi on 90/91 gas, then attempt for 18psi on a 50/50 water-meth AEM injeciton kit, and see how that goes.

 

Mine did the same, but I'm relatively stock. Stock ECU and injectors. Just intake, dp, high flow, and cb. :\

 

Did you check your AFRs? I've been pretty steady at about 11.2 even with 0 degree charge temps. As I'm sure you know, you have to have PLENTY of fuel with this car under high boost, especially if you're not injecting water. Better too rich than a popped engine. I popped my first engine on a cold night as well, the cold intake charge is very dense and you need plenty of gas. Even though the cool temps help to stave off detonation, they don't help much during an extended fourth gear pull (for example).

 

Fun smackdown of a Beemer M3 last night up to 120....16 psi and 2 C charge temps. Then he tries doing a flybye...I gave him an extra big thumbs down out the window. *OWNED*

Did I mention I love this car? Endless entertainment. It's literally non-stop from these little crackheads who want a piece of the almighty FD.

"The -7- can't lose"

 

.
Yea I will have to say the gains in this weather is unbelievable even in FLA ..
I pulled out today & 1st & 2nd gear traction just wasnt there even though I have a brandnew set of Falken FK 452's on there she just didnt want to hook up ..
LOL
The 7's love this cold weather, Ill tell ya, it just pulls so hard..

 

How are you getting your temps down that low or rather why am I not??

I took mine out for a short drive today (car wash). I didn't boost because I'm still breaking mine in and I likely on got up to 60km/hr but my pfc reads 30.

It was not terribly cold today maybe 1 degree C but I'm not even close to your intake temps.

The only time I see intake temps as low as your is when I first start the car. My water temp stays low, around 85 (again read from pfc ).

Do you have everything ceramic coated, and wrapped down pipe, single turbo or ??
How do I lower my intake temps? My mods are in my sig.

 

I agree man, i been driving the 7 alot this past year and i am loving these cool temps.

I was passing people in 5th gear at like 60mph whereas in the summer, the car felt like it was dead lol

I dont go crazy on boost too too much though cause im on the stock ecu and stock turbos and idk, that + cold air = death

 

Well, here where I am in Idaho cold weather driving is just a fact of life. We get used to driving on slick roads. Since I just got my 7, I haven't even driven it in warm weather yet. We can get down to -30 F in the winter, and even in the summer it gets down to 40 or 50 every night.

Should I be concerned about AFR in this cold? My car is still almost completely stock.

 

Not sure. Your set-up seems fine. I'm running the M2 medium and consistently see temps about 20 C above ambient in summer, and a little cooler, about 10-15 C above ambient, in winter. The IC seems to be a bit more efficient with very cold ambient temps, for whatever reason.

I have the dp, turbo manifold, and UIM/LIM ceramic coated, but that shouldn't effect charge temps. It's all about your IC efficiency. Do you have an Ebay IC or something?

 

If you are running anything more than stock boost (10 psi) I would be concerned, yes. I consider a wideband AFR gauge a mandatory upgrade on these cars, since it's so critical to the life of your engine under boost.

 

Thanks, I'm all stock for now, but if/when I start down the road to more boost and more HP, I'll be putting and AFR gauge among others.

 

I have been thinking lots a bout this...... I do have an ebay IC, and that could be part of the issue.

Other things I have thought of are intake. What kind of intake do you have, OEM, or another box style setup? I have standard filters so I am likely taking in warm engine air.

Also my IC duct *could* use some improvements. This is not mine but the duct looks almost the same http://i254.photobucket.com/albums/h...oler/photo.jpg

The problem I might have with mine is the opening where the air comes in to it. By comparing my opening ( from what I remember as it is freezing cold outside ) to this one mine is a fraction of the size. http://i338.photobucket.com/albums/n...s/DSCN0909.jpg

I would think the larger the opening would allow more air to be channeled to the IC. It could also redirect air away from the rad too....


Anyway what sort of intake do you have and how large is the opening of your duct?

 

I feel after reading about all he popped engines it seems reasonable to go V8 after I decide to completely obliterate the rotary. Oh, the horror stories!

 

I went out and took a pic of mine.



Since the duct goes against my rad/AC I really do not see away of making the opening larger, without extending it down more. This pic was taken on a bit of an upwards angle so I could see the duct.

Perhaps if I dropped it down a bit and out it would cause a bit more air to run in to the IC. Any opinions?