So I'm deciding on ordering the WMI or not. Currently running E30 blend. Will the gains from E30 Map 5 be significant? How often do you have to refill, and how much does the average gallon fill cost? I'm iffy because I'm not sure if I'll keep the car more than 2 more years. So the more I mod, the more I gotta remove.
If you already have E85 access WMI gains are not dramatic, maybe 1-2mph trap speed in the 1/4 mile. If you're doing races and measuring time it's a big improvement. If you live in a warm climate doing back to back runs you'll also see a big improvement. As would anyone using just pump gas. But other than that usually WMI isn't a huge benefit to E85 cars.
From a user's perspective I don't regret it. It lowers my IAT temps, drops the charge air temperature and for sure the temps in the cylinders. I did 4 runs using a 1gal tank mixed 50/50 and it only used 1/4 of the tank using the BM7 nozzle. A gal of Meth at my local shop is $4ish. If you just run Map7 now and then 1 gal will last you weeks because it will fill your 1gal tank twice.
I ran Map4 several times with E30 and really studied my logs. 4 and 5 are the same minus the taper. I was barely topping 20psi. Once I ran Meth, by the second pull I was tipping 22psi and the car loved it.
I am not a paid sponsor, lol... I also ran 50/50 mix on my naturally aspirated 383 stroker and gained 3 tenths due to the ability to increase timing manually without knock. I'm a believer and I have the statistics.
