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Nice. I saw mine flash 149 for an instant, but traffic was just getting too iffy for me to stay in it any longer. I do think it had more to give, I just didn't have the space to try.
Right after that it cut throttle only been up there a few times and one night I believe I averaged 110-130 the whole way but I hardly get to have fun with the car, main commute lately has been to work and back 7.5-10 miles depending if I want to hop on the highway and the on ramp and switch over is the funniest part but short lived
 
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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hell yes!!
 
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
 
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
I hate to do it, but I need to call bullshit on this.
 
Yeah the 170mph speed test at stock does seem a bit high. In game, that did take awhile and prefect conditions. I wonder how many folks have been at the 143 limit in their GRC
I went 146 before i let off 🤷🏽‍♂️
 
The top of 6th gear is about 170, at 6k it would only be 146 mph.

Funny enough I went to go plug this into a gear ratio calculator and had to find out the hard way that we have 2 different final drives. Honestly didn't know that 1-4 and 5/6/R have different final drive ratios.
 
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).
 
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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Are you stock?
 
I have a 25 PP auto. I think I could hit 150 easy if thr engine had more and there was a bit more down force in the front and rear who knows. 138top speed so far but I'm taking it easy since then. No sense in losing it all with a car I love. I feel like 160 is doable stock but beyond that as mentioned needs more downforce
 
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