EcoModder.com

EcoModder.com (https://ecomodder.com/forum/)
-   EcoModding Central (https://ecomodder.com/forum/ecomodding-central.html)
-   -   How lotus elise/exige accelerate so fast without much power? (https://ecomodder.com/forum/showthread.php/how-lotus-elise-exige-accelerate-so-fast-without-41476.html)

jimchitas 07-21-2024 02:45 PM

How lotus elise/exige accelerate so fast without much power?
 
Well the most cars powered by a internal combustion engine
(Gasoline) (Not diesel) they can accelerate in 3-4 seconds they have high power figures 300++ and elises/exige they only need 170-230 and they do it more efficient (irrelevant with engine efficiency)same as alfa romeo 4c i know weight plays big role and gearing but how they setup the suspension and chassis for those numbers
Is it the weight distribution who has so much effect or suspension/chassis/tires who does the most job
Now i get it this really irrelevant with most threads but if someone can help me and explain me how they achieve this it will help me a lot :)

freebeard 07-21-2024 03:34 PM

Colin Chapman:
"Simplify, then add lightness"
"Adding power makes you faster on the straights. Subtracting weight makes you faster everywhere."

jimchitas 07-21-2024 04:24 PM

asnwer
 
Quote:

Originally Posted by freebeard (Post 694433)
Colin Chapman:
"Simplify, then add lightness"
"Adding power makes you faster on the straights. Subtracting weight makes you faster everywhere."

i get the point but compared to other cars with same power to weight ratio they accelerate way faster i believe is optimal weight distrubution 40/60 and gearing for best possible traction but they sure did a lot of stuff with suspension setup and chassis (great torsional rigidity for its size) aerodynamics in 0-60 doesnt affect to much but still how a exige can do it 4 secs with 180 hp its crazy

freebeard 07-21-2024 06:20 PM

Maybe your answer is here: https://www.zeroto60times.com/
Quote:

Keep in mind that there are a number of factors that need to be considered when looking at 0 to 60 and quarter mile data. The ones that have an effect on the 0-60 times and quarter mile car stats include, (but aren’t limited to), the tune of the road test vehicle, fuel level (or battery level for EVs), fuel octane, engine temperature, road surface condition, elevation, air temperature, barometric pressure, acceleration measurement method, tire pressure and the variance between professional test drivers … Read More
For me the metric would be 60 foot and quarter mile times.

jimchitas 07-21-2024 06:54 PM

idk
 
Quote:

Originally Posted by freebeard (Post 694438)
Maybe your answer is here: https://www.zeroto60times.com/

For me the metric would be 60 foot and quarter mile times.

i will agree and like you said 60 foot is pretty good comparison in terms of acceleration.
i will disagree with quarter mile in a sub 200 horsepower car its not really good comparison i mean the first 120 km for sub200 you might seen good numbers but 120-2xx km pretty much every 'underpowered' just loses this fast "momentium" rarely i seen a underpowered having a 100-200 km time under 10 secs yea drivers matters and tranmission but i believe is more important a good acceleration from 40-140km for a fun good handling car then you looking at high power car now back in my question i found out they use bigger tires in rear for better traction same with some front wheel drive cars im still wondering if i can any information about suspension setup (damping,height,...) but thanks

Isaac Zachary 07-21-2024 07:43 PM

This seems similar to what I had posted elsewhere about the Koenigsegg Jesko making the new 0 to 400 to 0 kph record all with traditional ICE.

I think people are easily influenced by "ICE is good for this, and EV is good for that, and you need this much power and that much torque and blah blah blah." It's better to just leave it to the real engineers to make them work and then have them explain it to us how they did it.

https://www.youtube.com/watch?v=KUIzJPyl3LI

Ecky 07-21-2024 09:41 PM

The answer is mostly in gearing. The difference between 4 seconds to 60 and 6 seconds to 60 can be as little as the second gear ratio of two different cars. If you have to shift at 58mph, you're going to add near an entire second to the time.

Not all cars are geared to win in 0-60.

Beyond that, there's no magic to the Lotus formula, outside of them being light cars with good weight balance, short gearing, and a lot of tire.

I previously had a Honda Insight I had swapped a K24 into. It weighed almost exactly the same as a 2005 Elise, with around 40 more horsepower, but I chose to gear it differently, for fuel economy. 2nd would top out near 80mph. It was considerably quicker in the quarter mile than an Elise, but slower to 60 real-world.

freebeard 07-21-2024 11:52 PM

Quote:

now back in my question i found out they use bigger tires in rear for better traction same with some front wheel drive cars im still wondering if i can any information about suspension setup (damping,height,...)
I've run staggered tires on VW Beetles since the 1980s. For a balanced performance you want anti-squat. In straight line acceleration with RWD, weight transfer is your friend.

https://i.pinimg.com/originals/e3/f1...cfe035930e.jpg
i.pinimg.com/originals/e3/f1/df/e3f1df3014c31db8e69a9ccfe035930e.jpg

Why that Henry J has a dropped axle is a mystery to me.

redpoint5 07-22-2024 01:04 AM

The Elise was on my short list when my 1996 Legacy was rear ended. It was on the list because it has high performance figures and decent fuel economy. Plus, it has a Toyota engine which should be reliable and efficient.

That said, my 600cc motorcycle goes 0-60 in like 2 seconds and costs practically nothing used. I'd take anything with 2 wheels over anything with 4 for the fun factor at a fraction of the cost.

jimchitas 07-22-2024 07:03 AM

Quote:

Originally Posted by Ecky (Post 694444)
The answer is mostly in gearing. The difference between 4 seconds to 60 and 6 seconds to 60 can be as little as the second gear ratio of two different cars. If you have to shift at 58mph, you're going to add near an entire second to the time.

Not all cars are geared to win in 0-60.

Beyond that, there's no magic to the Lotus formula, outside of them being light cars with good weight balance, short gearing, and a lot of tire.

I previously had a Honda Insight I had swapped a K24 into. It weighed almost exactly the same as a 2005 Elise, with around 40 more horsepower, but I chose to gear it differently, for fuel economy. 2nd would top out near 80mph. It was considerably quicker in the quarter mile than an Elise, but slower to 60 real-world.

thx i look to some numbers and really gearing makes them accelerate/launch pretty well now they only information is the suspension setup of lotus exiges i found something on a lotus forum but thanks for helping me

jimchitas 07-22-2024 07:04 AM

Quote:

Originally Posted by redpoint5 (Post 694448)
The Elise was on my short list when my 1996 Legacy was rear ended for precisely the reason that hit has high performance figures and d decent fuel economy. I think it has a Toyota engine.

That said, my 600cc motorcycle goes 0-60 in like 2 seconds and costs practically nothing used. I'd take anything with 2 wheels over anything with 4 for the fun factor at a fraction of the cost.

sadly i dont like bikes :(

Hersbird 07-24-2024 03:54 PM

Quote:

Originally Posted by jimchitas (Post 694439)
i will agree and like you said 60 foot is pretty good comparison in terms of acceleration.
i will disagree with quarter mile in a sub 200 horsepower car its not really good comparison i mean the first 120 km for sub200 you might seen good numbers but 120-2xx km pretty much every 'underpowered' just loses this fast "momentium" rarely i seen a underpowered having a 100-200 km time under 10 secs yea drivers matters and tranmission but i believe is more important a good acceleration from 40-140km for a fun good handling car then you looking at high power car now back in my question i found out they use bigger tires in rear for better traction same with some front wheel drive cars im still wondering if i can any information about suspension setup (damping,height,...) but thanks

The 1/4 mile has been the benchmark for measuring acceleration for 75+ years now. I would say the 1/8 mile is an acceptable substitute but there can be some one trick ponys to game the 1/8 mile. The 60 foot times will be included in the 1/8 or the 1/4 mile, but a time to speed like 0-60mph or 0-100mph is hard to accurately measure by comparison, especially 70 years ago. Time to distance is easy to measure down to a thousandth of a second. Plus a time to distance can be done as a race, where time to speed is hard to judge as a race.

freebeard 07-24-2024 04:44 PM

I suspect 1/8th mile is due to constraint on the real estate available.

With the introduction of the Christmas Tree at the starting line it's possible to sort out the driver's reaction time, a negative time is a red light.

redpoint5 07-24-2024 08:58 PM

Quote:

Originally Posted by jimchitas (Post 694450)
sadly i dont like bikes :(

My wife says she loves a thrill too, except for her threshold for fun is different than mine.

...I must have been on the brink of passing out on that last post, but people seemed to get the gist.

jimchitas 07-26-2024 02:00 PM

Quote:

Originally Posted by Hersbird (Post 694482)
The 1/4 mile has been the benchmark for measuring acceleration for 75+ years now. I would say the 1/8 mile is an acceptable substitute but there can be some one trick ponys to game the 1/8 mile. The 60 foot times will be included in the 1/8 or the 1/4 mile, but a time to speed like 0-60mph or 0-100mph is hard to accurately measure by comparison, especially 70 years ago. Time to distance is easy to measure down to a thousandth of a second. Plus a time to distance can be done as a race, where time to speed is hard to judge as a race.

i will agree measuring something based on distance is easier but we have gps now that are accurate like "dragy" the issue with quarter mile underpower cars (we talking about perfomance cars with under 250hp) is they do accelerate well but after first 130km their momentium is way lower compared to a high horsepower heavier sedan to explain it better
lets take as example a audi rs6 c6 will do 0-60 in 4.2 secs a exige s could do in 3.9 but the thing the 100-200 of rs6 will be a lower time than exige s like a exige could do 13 sec quarter mile and rs6 could do it 11 secs the best comparison might for cars like those is 1/8 and 60-160km

freebeard 07-26-2024 03:49 PM

Here's a new feature for DuckDuckGo:
Quote:

DuckAssist
BETA
GPS accuracy can vary depending on factors like satellite geometry, signal blockage, atmospheric conditions, and receiver quality. Typically, GPS-enabled smartphones are accurate to within a 4.9 m radius under open sky conditions, but this accuracy can worsen near obstacles like buildings and trees. High-end users can achieve real-time positioning within a few centimeters using dual-frequency receivers or augmentation systems.

More in GPS.gov from gps.gov and the Overview section of the Global Positioning System Wikipedia article.
Auto-generated based on listed sources. Responses may contain inaccuracies.
The purpose of drag racing is competition, not research. Head-to-head is obvious, but bracket racing is about consistency.
Quote:

https://en.wikipedia.org › wiki › Bracket_racing
Bracket racing - Wikipedia
The effect of the bracket racing rules is to place a premium on consistency of performance of the driver and car rather than on raw speed, which in turn makes victory much less dependent on large infusions of money and more dependent on mechanical and driving skill.
100-200km/hr is easier to convert to freedom units. ;) How's about the flying mile?

Quote:

https://newatlas.com › bentley-continental-gt-flying-mile › 37421
Idris Elba sets "Flying Mile" UK land speed record in Bentley ...
The "Flying Mile" takes the average speed of a vehicle across two rolling-start runs of a mile (1.6 km) each. Elba achieved an average speed of 180.361 mph (290.263 km/h).
One can do that pretty much anywhere. Bonneville Speedway has 2.5 to 9 miles.


All times are GMT -4. The time now is 11:17 AM.

Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2025, vBulletin Solutions Inc.
Content Relevant URLs by vBSEO 3.5.2
All content copyright EcoModder.com