Take a short cut and hope no-one notices.
do what the dude did in the marathon he got onto the bus and then got off 2 miles from the finish and came first.
But seriously you wont be able to reduce your time in 5 days.
I currently run 1.5 miles between 9 mins-10 mins though probably can go quicker if i went **** up.
What kind of race is it?
I ask as i know of very few 1.5 mile races most are 5k or 10k.
But here a few suggestions.
1:
1.5 mile is possible to sprint a lot of it, so with this in mind WARM UP PROPERLY before race, a good 10-15 mins of warmup then settle down with some Dynamic stretchs like leg swings, hurdle legs ect.
Doing this will prepare your body for intense exercise and loosen the muscles well before race, this is VITAL for any fast runs.
2:
Suggest you test this before race day on a test run.
Take a TEA SPOON (not table spoon!) of sodium bicarbonate to 250ml of water and mix take this 1 hour before the race....the taste is foul as hell, but its been proven to decrease the Latic Acid you get in the muscles .
But test this before the race as some people find it gives them the *****...

3:Good night sleep before race and eat healthy fruit and veg ect.
other than that no real training aids can help, unless ofc you have a problem ie tired legs~?
hope this helps i got a cross country race on sunday this week, im ******** myself about it too, so dont feel alone
