ORIGINAL: Frost_

Look, it really doesn't matter what other's settings are... SOOOOO many variables affect this (plug type, fuel type, relative humidity, temperature, differences in eniges and carb that are within allowed manufacturing deviation....) that what one person runs is no comparison to be using against yours.

TUNING 101

There is NO HARM in running the the S25 up to 270F as long as it isn't lean (stuttering).... They guys on another forum have been performance tuning vs. temperature tuning with interesting results. Their engines are running as long as those who were obesessing over lower temperatures, all the while the performance tuned engines were SCREAMING. Did you know that even with 16/49 gearing the stock S25 can be made to wheelie at will AND give good pull to top end? It can while at 270 or so and still provide longevity.

Tune for performance, forget the gimmicks, go with what works.

If you are already getting good top end and you are running at 250F or so (if you haven't bought a 20 dollar temp-taker DO IT) here is what to do to get SNAPPY response, this is what pulls wheels and gives you that GREAT take-off:

1. Since off the line "snap" can be given or taken away by being lean OR rich on the LSN the first move is a guess (well it won't be after you get a feel for it, but this will get you going quickly)...

2. Pull the truck up in front of you and let it idle for 8 seconds. Then pull the trigger to WOT... Did it scream and take off? If no:

3. You have to go one way or the other... choose richer or leaner (suprisingly to many beginners, off the line stutters can be caused by too lean conditions just as easily as too rich) and turn the LSN in that direction 1/16th of a turn. Make a short pass at medium to high throttle and return the truck to in front of you.

4. Let it idle 8 seconds and floor the throttle. Did it take off better or worse? If better, turn it a 1/16 in the same direction, if it got worse, turn it 1/8th the OPPOSITE way. Either direction you started in, now you will be going one way based on whether it got better or not... either richer or leaner.

5. Make another short pass at medium to full throttle (AFTER you made the change to the LSN) and return the truck to you. Let it idle 8 seconds and floor it. Is it still getting better? If so, continue to lean or richen using the pass/idle 8 seconds method until you lose preformance and back up a step...

If your temps are in range this is how to quickly get your truck to "explode" off of the line... Always make the pass to clear out the engine and then let it idle 8 seconds. The idling will allow it to either lean out or load up, depending on which way the current settings are off... Get the hang of this and your truck can really take off. If you end up leaning the LSN out excessively make sure to keep an eye on temps, your top end needle may need a bit of enrichment.