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Theoretical Top Speed?

24K views 60 replies 30 participants last post by  poe  
#1 ·
Has anyone calculated the theoretical gear limited top Speed of the GRC if the electronic limiter would be removed?
Probably wouldn't want to go further than 150 anyways with the short-ish wheelbase, but I'm curious.
Thanks !
 
#2 ·
So I mess around with a game called beamng.drive. It tries to be realistic when it comes to the mechanics of vehicles and world physicals. I actually already modded a vehicle in game to be close like the GRC is in terms of drivetrain(awd,gear ratios,final drive ratios) and engine torque/hp(273lb-ft at 3k / 300hp at 6.5k) and approximately its weight. Mind you this is still a game and I'm just messing around here... but I was able to get 170mph on a high speed ring track(so without the limiter) in stock GRC specs form. With no limits to power. 6th gear at 7k will take it to 177mph, as long as my calculations in the code were correct :)

Also ignore the high boost numbers :), My goal was to get torque and hp correct, not psi numbers.

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#11 ·
Assuming the gearing ratios, tire size, and redline i found on C&D are correct,
170 MPH Core & CE
164 for the Morizo

I did 130 nearing the top of 5th at Summit Point. I would say this seems reasonable.

then again, i'm not sure how far off the speedo is at 130... might have only been 118 :rolleyes:

 
#18 ·
+1, although it was 6th gear (maybe you made a typo?). I actually saw it flash 149 for an instant. I was not aware until I just read this that the car is allegedly artificially limited to 143. If I read it somewhere before, I sure forgot. So I was trying to get to 150, but got too uncomfortable with the amount of traffic to stay in it. This makes no sense at all if there's supposed to be a limiter there, but I know what I saw on the dash, and so does the ECM.
 
#32 ·
I even tried it in expert mode it stops at 6000 RPM while in 6th gear got to love the drive from New-mexico to Roswell where the roads are as far as the eye can see and smooth, my trip back to Texas just after Christmas! i kept on it for at least 20-30 seconds and it seemed fine to me at this speed. I'm not one to drive fast unless the conditions are right. It was cold and at high altitude on 91 octane which is all you can get up there. I do notice with my cruise control it would sometimes be off a single MPH bellow what it is set to, but not always not to sure why that is but perhaps that is why it only showed 149 instead of 150. Temps were lower on mine I noticed, but it was also 39F outside temperature for me.


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#51 ·
I've had my GRC a few years now, and i have just a basic intake and exhaust, and nothing else no tune no anything. Mine did get to 174mph in 6th gear at about 1000 away from redline. And it didn't seem to struggle getting there by any means. Idk about all this stuff saying anything about the "limiter" but if me changing my intake and exhaust does something about that then i get it. But it did get there easily might i add. So that guy about the beamng game, it seems pretty spot on to the car itself
 
#57 ·
Hey fellas. Honestly you don’t need to ‘calculate’ anything. Go on the highway in 6th gear at take it to 3500 rpm. Note that exact speed. Now multiply it by 2 and that’s your theoretical top speed in 6th gear at 7000 rpm, if your engine makes the power to overcome the wind resistance to get there. Easy peasy to figure out. Mine is a Morizo, so it actually has lower gears in the trans (for better acceleration on track) and has a lower theoretical top speed than any other GRC model (did that excercise once; took it to 3500 rpm in 6th and then multipled by two and if I remember correctly it was just barely under 150).