First weekend I've had off in a while and wanted to go up the track saturday morning. Weather forcast says low 40's. When is the air too cool for racing. JDM said that with my chip on the track side, must have race fuel in cold weather.

 

whens theres ice on the track.

 

LOL when there's ice on the track

pretty good.

It is NEVER too cool for the truck. I assume Jim@JDM said that because the Cooler the air, the Denser it is. Meaning more oxygen packed together in a given amount of air. the more oxygen present in the air, the more oxygen enters your engine. More oxygen with the same amount of fuel = lean condition. Lean condition= detonation, which race gas helps prevent.

I hope I'm understanding you/him and have explained this correctly.

later,
chris

 

its never to cold to race!!!!!

 

i completely understand the logistics of the air/fuel/detonation problem. Just not sure if maybe with a chip that there would be a cutoff as far as temperature goes because of air temp sensors and timming issues.

 

The only time it is too cold to race is when the starting line wont hold the power. If the track itself is cold, then you will not get traction. Hopefully you have lots of local racers with big slicks that run before you do.

G

 

I've had to drive my L before at -42 below zero. I didn't race it though!

 

Superfords you put it well man ...

 

Yep,
That would be your biggest hurdle.Traction.

 

but in very cold weather if you let your truck cool down too much you may run richer because of drive cycle and adaption. you do not want to be too rich or you may run slower.

 

Aw, the traction problem

 

I think maybe you guys are missing the point. 65-70 degrees or less is where you computer adds more timing (3 more degrees I think) and so if your on the edge of detonation with the more timing (track setting) you may need to offset the timing with better octane. This could have been what he meant...

 

I've had my L for only a couple months. When I got it the day temps where near 90's, nights in the high 70's or low 80's. Getting it to break the tires loose was hit or miss at best.

Last night it was in the low 50's. I stopped on a empty road, and mashed it to the floor. My L never did this before! It left two thick black patches 100+ feet long. Wasn't the road either... I tried several, and each time the L responded the same way.

It was like a Dr.Jekle and Mr.Hyde thing!

/tg

 

 

Thats exactly what I understood as well...

THe cooler IAT allows the PCM to crank itself up ... Or another way to put it in the heat of teh summer the chip may be commanding X timing BUT the PCM is taking timing away due to HIGH IAT

Doug