How cold does it have to get and what mods put your engine in danger..

I thought colder was better??

Is it the boost increase due to the denser air??

 

Yes, to all of the above. Colder makes more HP. Denser makes more boost, while also at the same time leaning your mixture some, and many of our trucks are tuned to the edge in warm weather. I've heard 50's and lower qualify for "don't nail it" weather.

 

50* HA! won't see that until May.

 

hmm well mine is not tuned to the edge. it is a conservative tune.

and stays very rich @ wot. the 3rd and 2nd point away from the end of rich on the autometer.. for what that is worth.


Around here right now though it is 50s temp and I have raced several times in that temp.


I guess maybe putting a few bottles of octane boost in lower temp weather couldn't hurt.

Finally I am running the 4# pulley till it gets warmer again because with it and the cold weather I see almost 14lbs instead of the 12lb i see with it warm.

thanks for the reply

 

That is exactly what I did.

I took it to Sal and said I wanted to drive it daily, be safe, and I'd go to the track twice a year.
Given all my mods and my conservative tune I am right where I want to be. Now I want to free up the exhaust flow a little to keep detonation (HOT cylinder temps) at bay.

I could've probably gotten another 15rwhp and trq to the rear wheels on my street tune.. 11.4-.8 across the RPM range up to 5800rpms but leaning it out, but that isn't what I'm after.

I didn't want a DYNO queen that put down big numbers.
Heck, I'm running mid 12's and I don't even have a so called "RACE" program.

 

That's who I'll be using to make my L tunes

And I too am going to stay relatively conservative with the tunes.

Steve

 

Believe or not my out temp guage said 54* today in Burlington, VT

 

Talk to your tuner, as tunes can be adjusted for weather, race or street ect... anything less than 50 degrees for me is to cold but I'm sure the pros are a better judge of this than I.

 

I blew my engine in January. I had a 3# lower pulley, JLP ram air, and JLP chip. It was cold about -15* and was doing around 135mph on the highway and accellerating when it blew. Not much left of the engine after that. All the oil that left the engine started a fire on my cats and I had to put it out with snow.

 

What an Idiot. 135 MPH in -15* Weather?

 

Idiot?

Lets see desserted highway, that is dry. Good traction on an ice free highway. And did I say I used to race snowmachines on ice. And 135mph is slow comparred to some things I have driven.

 

jimjr is that you??? Caustic whit, seemed like you!!
Bryan

 

Well you guys do you think that a tune would allow you to keep it floored in any condition??

I mean we all know (well most of us) that pushing your luck in freezing or below weather is not a good idea.. but what if some of us live in cold weather all the time..

 

Floored = Closed loop = FIXED fuel = Bad idea !!!

 

Sure as hell seems like him, don't it? I miss that wit!