Did lotus rob us on horsepower?

[Tracked Emira]

This is a dyno I'm using to show that Lotus is not accounting for their claimed 400 horse power because I am not able to shift past 6,500 RPM. If I was able to go to the originally claimed maximum 6,800 RPM then the motor would unleash another 15 to 20 minumum horsepower.
If this is true then their claim of this 400 horsepower should be reduced to what the car actually puts out at the maximum RPM in the newer cars with automatics.
Brands have gotten sued over this and you have to spend a minumum of $1,500 with an upgraded intake or $2,500 for an exhaust system to gain that back based on the linear curve.
They should at least change their claims. My friend who just got the turbo says his goes to 7,200 RPM.

 

[seriously]

Autos have a lower rev limit?!

 

[Eagle7]

Keep in mind that chart shows the power to the rear wheels, which also shows how much drivetrain loss there is. The factory power rating is always what the engine is delivering at the crank, before going through everything in between the crank and the rear wheels. The amount of power that's absorbed by all those components is the drivetrain loss.

As you can see, the drivetrain loss on my car completely stock (this dyno chart was from my project journal thread) was 30 hp; only 370 hp out of the 400 was making it to the rear wheels. For the stock baseline run, the difference between 6500 and 6800 rpm is only 10 hp to the rear wheels which isn't much, and you're only going to see that increase above 6500 rpm

My car is the V6 with manual trans. If you're driving an automatic, the drivetrain loss is going to be different.

 

[chirowolf]

Was always under the impression that the engines are dyno out of the car in optimal conditions (like a crate motor) as Eagle 7 stated HP numbers do not reflect drivetrain losses.

 

[Jinba ittai]

Yeah. All manufacturers quote hp at the crank rather than wheel hp.

 

[Tracked Emira]

I'm talking at the crank, just using the dyno information as a guide to show what is lost in horse power between 6,500 and 6,800 RPM
It takes about $1,500 to gain every 10 hp in this motor. Whether it's a tune at $6000 to gain 40 hp or an intake at $1,500 to gain 15. Even shedding 181.8 lbs will only gain me about 10 hp, according to this Motortrend article on A Civic Si with the driver that weighs about the same as the Emira. So to shave 150 lbs with Ap racing rotors, GRP forged monoblock wheels, 2 Tillett seats, Antigravity battery, titanium lug bolts, an intake and a titanium exhaust system will cost over $15,000 to not even acheive this calculated 10 hp gain.
Granted, shaving this much weight will also help in handling as well as improving quarter mile time, which is more important than 10 hp.
It wouldn't be an issue if it didn't cost so much to extract each 10 hp, which is why even 10 hp is so important with the Emira.

 

[Jinba ittai]

Not to be an ass, but I think you bought the wrong car. This car is more about the qualitative elements than chasing numbers.

 

[Tracked Emira]

Not to be an ass, but I think you bought the wrong car. This car is more about the qualitative elements than chasing numbers.

I'm not chasing numbers more than making a point that the automatic doesn't rev to 6,800 RPM or use 400 hp as they claim so it should be changed on their website. I'm tracking my Emira just like everything else I drive. Even my Dodge challenger

Maybe I bought the Challenger for the wrong reason also
Are you tacking your Emira or anything else?

 

[Jinba ittai]

Fair enough, but if you’re tracking everything I still think you bought the wrong car. There are many cars that can do what you want for less money. There are not many cars that can match the Emira for feedback and driver involvement. I agree Lotus shouldn’t engage in false advertising but I’m not sure they have in this case.

 

[Tracked Emira]

Fair enough, but if you’re tracking everything I still think you bought the wrong car. There are many cars that can do what you want for less money. There are not many cars that can match the Emira for feedback and driver involvement. I agree Lotus shouldn’t engage in false advertising but I’m not sure they have in this case.

Please explain how you think I bought the wrong car if am tracking everything?
And why did you buy an Emira that is "For the Drivers"?

I track my challenger to show Ferraris & porsches at their events that it IS about the Driver and Not the car...My NSX just embarrasses them

 

[Jinba ittai]

I’m not tracking my car. I bought it for the enjoyment of driving it. Look, I’m just a guy on the internet and I’m not trying to judge. If you like the car, great, it’s the right one for you. I’m just saying this car is more about the experience than the performance numbers. I love it for what it is.

 

[Steve24]

Just out of curiosity, are you saying it bounces off the limiter at 6500?

Or is there nothing you can do to stop it changing at 6500, even though the limit is 6800?

 

[Porter]

View attachment 60021

This is a dyno I'm using to show that Lotus is not accounting for their claimed 400 horse power because I am not able to shift past 6,500 RPM. If I was able to go to the originally claimed maximum 6,800 RPM then the motor would unleash another 15 to 20 minumum horsepower.
If this is true then their claim of this 400 horsepower should be reduced to what the car actually puts out at the maximum RPM in the newer cars with automatics.
Brands have gotten sued over this and you have to spend a minumum of $1,500 with an upgraded intake or $2,500 for an exhaust system to gain that back based on the linear curve.
They should at least change their claims. My friend who just got the turbo says his goes to 7,200 RPM.

According to your dyno plot, that isn't even real RPM. They're using derived RPM guesses. I would take all of these figures with a grain of salt. Do they not have a pickup loop to put on the ignition wires?

Also, to respond to your later post, I think you have some misunderstandings about the math involved. Removing weight from the car does not add power. In fact I'm starting to think that you are trolling us. If so, good game, you got us, time to come clean.

 

[Tracked Emira]

Just out of curiosity, are you saying it bounces off the limiter at 6500?

Or is there nothing you can do to stop it changing at 6500, even though the limit is 6800?

It up shifts to next gear after it hits 6,500 RPM

 

[Tracked Emira]

According to your dyno plot, that isn't even real RPM. They're using derived RPM guesses. I would take all of these figures with a grain of salt. Do they not have a pickup loop to put on the ignition wires?

Also, to respond to your later post, I think you have some misunderstandings about the math involved. Removing weight from the car does not add power. In fact I'm starting to think that you are trolling us. If so, good game, you got us, time to come clean.

 

[Tracked Emira]

Seriously? How do you back up such an accusation. I waited 3 years fot this car and I expect alot since lotus has had all those years to perfect it. I am pointing something out just to have someone tell me I didn't buy the right car without even knowing me.

 

[Pixelated]

I have the V6 auto as well. In the screen it tells me the limiter is 6800(close to the 7k rpm line), so it’s actually telling me false info?

 

[Tracked Emira]

It may depend on the year. My automatic was delivered in the fall of 2024. Does anyone have a 2024 automatic delivered after the fall that up shifts to next gear at 6,500 RPM?

 

[Tracked Emira]

According to your dyno plot, that isn't even real RPM. They're using derived RPM guesses. I would take all of these figures with a grain of salt. Do they not have a pickup loop to put on the ignition wires?

Also, to respond to your later post, I think you have some misunderstandings about the math involved. Removing weight from the car does not add power. In fact I'm starting to think that you are trolling us. If so, good game, you got us, time to come clean.

Is JUBU using derived RPM guesses?

 

[FST]

I’m not tracking my car. I bought it for the enjoyment of driving it. Look, I’m just a guy on the internet and I’m not trying to judge. If you like the car, great, it’s the right one for you. I’m just saying this car is more about the experience than the performance numbers. I love it for what it is.

Why are you guys so defensive when it comes to performance? ‘Ooh you got the wrong car’ etc… No we got the right car! This is what we want, but we have been fooled with the numbers! The car is just not ffing performing enough that comes out of Lotus factory and being the latest ice car. we talked about this many times… its not only about the great looks or having a manual trans or whatsoever… it should ffkng perform like a 100k+ car! And thats the point!! I totally feel the pain with the guys who believe this car misses the performance! We are all spending left right and centre to get the numbers right… power to weight ratio etc, i have never seen a Porsche driver spending dousands of extra dollars to get the rev limit higher or add some power or reduce the weight.

Yes I do believe we are fooled and the numbers should be changed! I have never managed to get even close to 4.3sec to a 100!! Its always 5+. Something isn't right and we are all desperately trying to get there were we want it to be.

Stop defending that the is great.. yes by the looks, but thats it!