maybe next run ill have a vortex generator and take out my rear wing...
btw the front underbody panel has not been in my car since last summer.. so through my experience the car is very stable at high speed w/o it

 

Rollaway, you are not listening for whatever reason. If you know rpm, mph is EXACT. If you were traveling true 8600rpm, you were going 199.9mph. Here are the gear ratios for the Evo-

Final Drive Ratio: 4.529
1st Gear 2.928
2nd Gear 1.95
3rd Gear 1.407
4th Gear 1.031
5th Gear 0.72

Here is the tire diameter for a 235/45/17 tire: Tire Diameter 25.32677

Here are the speeds in mph for fifth gear at each specific rpm:
rpm mph
6000 139.4
6100 141.8
6200 144.1
6300 146.4
6400 148.7
6500 151.0
6600 153.4
6700 155.7
6800 158.0
6900 160.3
7000 162.7
7100 165.0
7200 167.3
7300 169.6
7400 172.0
7500 174.3
7600 176.6
7700 178.9
7800 181.3
7900 183.6
8000 185.9
8100 188.2
8200 190.6
8300 192.9
8400 195.2
8500 197.5
8600 199.9
8700 202.2
8800 204.5
8900 206.8
9000 209.1
9100 211.5
9200 213.8
9300 216.1
9400 218.4
9500 220.8



You don't need a frickin' GPS if you can get an accurate tach signal. Its simple math, and not effected by drag, weight, or atmospheric conditions. Understand now?

 

PS: Don't kill yourself. And taking off that wing is a bad idea. You can create a lot of lift at 200mph. Why not just say you've hit 200 and not try it anymore? The idea of this is terrifying to me.

 

as much as i would like to believe it... the GSXR1000 that paced me said i was only doing 180mph...

 

^then the stock tach is off. back when i had my prelude, it's tach was off too. at 8k i was only really doing 7400 i think.

 

Yeah the stock tach is CERTAINLY off, I thought I could hit 8000RPMS for instance, but My SAFCII showed 7860, so it is off, but the signal is not, so my Evo could possible hit 180 But I doubt I would have enough power, IDK, I let you know soon.......

 

Do not take the wing off. And GPS is VERY accurate, a handheld unit is cheap at Best Buy.

 

my car reached 150 mph @ 6500 rpm with 18s

 

ive actually driven at around 160mph with the wing off... its stable.. just dont try to make high speed turns

 

sweet dude. good work, i always try to pin my cars to the max. 160 in the STi.
later
andy

 

wonder if my 19" wheels will allow me to go faster, I know my spedometer is reading a little slow now.

 

Hasn't anyone seen the Video with the Hayabusa and the GPS speedometer? It's pretty small and fit on the guys dash with room to spare. He hit 227

Why would it matter what drag/etc are, because your car begins to slow down when you hit your aerodynamic threshold, ie. your tach starts moving slower and slower.