I have an 06 Evo9 MR 6-speed. I have read a lot about gear ratios and final drive ratio but i either don't seem to understand it fully or there i read too much misinformation. My goal is to make the car so it can possibly hit speeds of 187mph+
How much power would i need in theory? is there a Top Speed calculator somewhere on the web?

so according to this thread
https://www.evolutionm.net/forums/ev...atios-mph.html
a 5-speed evo @ 7800rpm can hit 181mph in theory given enough power. the stock evo turbo stops making power @ 7600rpm if im not mistaken. Let's say this evo was to have a Big turbo that revs to 10,00rpm. With the stock gearing and stock final drive, can this car hit past 181mph?

according to this other thread. 10,000rpm is 231mph...
https://www.evolutionm.net/forums/ev...top-speed.html

The HKS 4.11 doesn't fit on the 6-speed if im not mistaken. After a certain speed, aerodynamics will come into play, but my questions is just about the possible to hit 187mph+ on stock gearing if given enough power

 

where are you driving that fast anyway?

 

187 MPH will not be an issue with 6-speed gearing. Anything over stock redline (7800) will be enough to hit that on stock-size tires. Change tire diameter and speed at whatever rpm changes as well, but I'm sure you know that already.

I have a spreadsheet to calculate it. I can e-mail it to you if you want. Hopefully my calculations are all accurate and I'm not misleading anyone.

As for power, I don't think you should need much more than 400 whp on a Mustang Dyno.

 

^ you have one of these for the 5speed 8 and 9 Evo?

 

Yup!

 

lolz i thought they were limited to 155 (drag/redline)

 

Great info Blitz!

 

im not gonna drive that fast.i just want to theoretically know how fast i can go :P

 

great info blitz! thanks for the chart! its exactly what i was looking for

 

oh another question blitz...like our redline is 7800rpm right. but the car was geared to 9000rpm on the stock tranny. so basically, if i had 400whp w/ speed limiter removed i could hit 187mph no problem right? that is with the stock tranny? before i used to think that even if you could rev to 9000rpm, your car wouldnt be going any faster...like the gearing would run out or something...

 

Blitz great information, looks like we can hit the higher speeds if we go rev happy. Although in theory how much time would it take to reach 8500? Im questioning how much time it would take the 400 whp needed as noted to hit the 200 mph mark when already in 6th? Are any variables taken into consieration such as areodynamics, weight, drag (friction, air resistance...)... Would terminal velocity not hit before the 200 mph mark (ie the force of the air resistance will equal the the force of the car's acceleration) Just out of curiosity. Yet again thanks for the information.

Also for those that are not aware, sheppard racing is manufacturing a built 6 speed with a 3rd gear ratio of 1.428, a 4th gear ratio of 1.083, a 5th gear ratio of 0.862 and a final drive ratio of 4.09. The transmission will handle 550-650 whp and 450-550 wtq. The link is below

https://www.evolutionm.net/forums/ev...rans-6spd.html

 

in a school zone ;o

 

Nice...I've been meaning to look up the 8 & 9, 5 spd gearing and mph for my 5 spd build...glad I caught this thread...

 

Thanks blitz! Good stuff! Mods sticky this info! Will help allot of people in thier builds, especially if your dragging your car and you wanna hit your top speed in fourth! Now we know our limitations!

 

I really dont think it would take long to hit 200 with 400whp. I can hit well over 150 mph in the standing mile, gps verified, in my 5spd 8 with the stock turbo.