Let me just be honest...This achievement was just as hard as the, "Mile High Club" in CoD or Afro Samurai's Full House Poker cheevo. With little to go on from the internet I had to re-evaluate from the ground up. I feel terrible for anyone still attempting this because of how much Luck, Skill and extreme perseverance it took to obtain this 15 point of crap.
A few tips...
You best believe this track is jerry rigged by Obama himself. I dont know how many times I would be making great time only to have a car randomly just jolt into me at 230mph or go down the off ramp and to semi trucks would somehow be changing flat tires...Insane
1. Slow motion is garbage, dont even bother with it. Creates more of an issue then just restarting.
2. F$%k The super Lambo...use the Tier 2 Model maxed out no Tuning.
3. If you dont have 54-55 seconds on the first check point restart.
4. Dont just Nos away, I found it much easier to use it in short burst throughout the entire course. Draining it all the time just left me empty for times I could have used it, especially around the complete circle turn on the highway. Once again if your not doing 130-145 plus down that ramp...restart.
5. If you use the brake once...restart. Only let off the gas around sharp turns and start turning just before, somehow the handling just kicks in faster. "IDFK".
6. If you own a pistol or SMG give them to someone responsible because chances are your going to use them on something during the intercourse of this achievement.
All jokes aside this was one of the hardest cheevos I have ever tried for and it just seems so simple. Countless times I would think, "Yeah, I got it this time"...only to come up seconds shy with no clue as to why. You really just have to try, Try and TRY until that little sexual magic noise lets you know the War is over.
Seriously good luck.