Acceleration Boost?

[zipzag]

Can the truck can go faster? The battery C rate probably says yes on the large pack. The modest 200kw max charging rate perhaps suggests no.

Anyone know where in the 1/4 mile the truck hits max speed?

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[Doublemfarms]

From what I’ve seen it goes through the traps at like 112, top speed is 115. I wish it was 130

 

[electruck]

It is software limited at about 115 so not impeding the 1/4 mile. At least one pre-sale unit without the limiter hit close to an indicated 130 at a test drive event in Normal.

 

[SeaGeo]

I suspect they're limited by the motors and traction. Control and not the battery.

The 200kw charging is just limited by the CCS connector standard, not the batteries or the internals.

 

[E.S.]

Can the truck can go faster?

Friggin thing weighs 7k lbs, why do you want that wrecking ball to go faster?

 

[Gator42]

Friggin thing weighs 7k lbs, why do you want that wrecking ball to go faster?

Kessel Run.

 

[zipzag]

Friggin thing weighs 7k lbs, why do you want that wrecking ball to go faster?

I don't. I find a five second quarter mile is as fast as I want.

 

[Dark-Fx]

Why go fast when you could go fast-er?

 

[Blueassassin]

Easy remove weight. Gut the truck and put four slicks on it in a smaller diameter wider tire.

 

[zipzag]

I suspect they're limited by the motors and traction. Control and not the battery.

The 200kw charging is just limited by the CCS connector standard, not the batteries or the internals.

All fast EVs are traction limited at low speed. Most fast EVs limit power at full acceleration, except perhaps Plaid. I'm surprised no one has put a Rivian on a dyno yet. Although perhaps it would break most machines.

 

[ajdelange]

The vehicle is torque limited at low speed and so, for best 0-60 performance it makes sense for the motors to hit the power limited region right at 60. Up to that point acceleration will be constant (speed linearly increasing). Beyond 60 the vehicle acceleration will decrease but if held at the power limit speed will still increase monotonically. Thus the top speed will be reached at the quarter mile.

 

[Zoidz]

It's an engineered system to a design spec. We obviously don't know the details, but we can assume that everything is sized/engineered to a best cost and performance spec. In other words, the motors are matched to the inverters, and matched to the CV joints, and matched to the rear magnetic clutches, etc.

Could someone hack/reprogram a Rivian to pass more current to the motors? Possibly, but what breaks/overheats/burns out when you do that?

Kinda like putting a supercharger on a Honda Civic. Yeah, you can do it, but how long does the rest of the drive train hold together?

 

[zipzag]

It's an engineered system to a design spec. We obviously don't know the details, but we can assume that everything is sized/engineered to a best cost and performance spec. In other words, the motors are matched to the inverters, and matched to the CV joints, and matched to the rear magnetic clutches, etc.

Could someone hack/reprogram a Rivian to pass more current to the motors? Possibly, but what breaks/overheats/burns out when you do that?

Kinda like putting a supercharger on a Honda Civic. Yeah, you can do it, but how long does the rest of the drive train hold together?

Not the way it works at Tesla

 

[ajdelange]

Could someone hack/reprogram a Rivian to pass more current to the motors? Possibly, but what breaks/overheats/burns out when you do that?

Yes, you can force more current through the motors than the design but that would result in exceeding their torque limits and something would give.

 

[Blueassassin]

All I'm thinking of was this disaster Saleen had when they tried to mess with a tesla in the early years.
https://www.motorauthority.com/news/1095634_saleen-renames-its-modified-tesla-model-s-the-st

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