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FR-S / BRZ vs.... Area to discuss the FR-S/BRZ against its competitors [NO STREET RACING]


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Old 04-27-2012, 08:42 AM   #57
Dadhawk
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Originally Posted by engee View Post
Congrats but I'm pretty sure those weights are purely the car. I think you need to add your weight plus the weight of the car (which is what I listed).

There really isn't a way to calculate what difference it makes. In the grand scheme of things, the extra 20 lbs that you want to lose is not going to improve the car in any significant way. This is also taking into the other facts that you really can't recreate the same 0-60 launch over and over with consistency and keeping all other variables the same. Even at a drag strip, no one ever runs the same exact time every single time.

However, I think you'll see significant improvement in your health, fitness, and overall confidence. :happy0180:
Thanks.

The weights I gave are car+my.original.weight compared to car+my.current.weight.

So, regardless then, it sounds like there isn't a particular formula that estimates a performance gain by shedding weight, whether its the car's spare tire, or mine it sounds like.
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Old 04-27-2012, 11:05 AM   #58
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Quote:
Originally Posted by Dadhawk View Post
Thanks.

The weights I gave are car+my.original.weight compared to car+my.current.weight.

So, regardless then, it sounds like there isn't a particular formula that estimates a performance gain by shedding weight, whether its the car's spare tire, or mine it sounds like.
I remember on another car forum someone said to get the pounds/hp (2762lb/200hp which rounds up to 14lbs per hp) and that gives you roughly the number of pounds to give the car of feeling of having 1 extra HP. Not sure how strongly I believe in this but just throwing it out there.
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Old 04-27-2012, 11:24 AM   #59
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I remember on another car forum someone said to get the pounds/hp (2762lb/200hp which rounds up to 14lbs per hp) and that gives you roughly the number of pounds to give the car of feeling of having 1 extra HP. Not sure how strongly I believe in this but just throwing it out there.
That's OK, that works for my purpose! Thanks.
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Old 04-27-2012, 11:26 AM   #60
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Originally Posted by Dadhawk View Post
Thanks.

The weights I gave are car+my.original.weight compared to car+my.current.weight.

So, regardless then, it sounds like there isn't a particular formula that estimates a performance gain by shedding weight, whether its the car's spare tire, or mine it sounds like.
There are plenty of formulas for estimating acceleration based on hp and weight. Google 1/4 mi calculator and you should get a bunch of hits.

For example, from my first result I got:
3060 lb (2760+300), 200 crank hp = 14.5 sec ET
2960 lb (2760+200), 200 crank hp = 14.3 sec ET

Obviously these are estimates, but they can give you a feel for how much ET change you might see from a given weight change.
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Old 04-27-2012, 12:18 PM   #61
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DadHawk

WTG congrats, and I love the idea of having a motivator/reminder in the car.

I like the idea of converting it to a HP figure, and yes at the end of the day what matters is hp vs weight, the easiest HP is weight reduction.
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Old 04-27-2012, 08:37 PM   #62
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Originally Posted by Phaedrus29 View Post
I really have my heart set on the BRZ over the FRS. My wife has a Subaru and I generally like the brand...and I do slightly prefer the styling and the HIDs. But these reviews that have just been posted have me worried. The reviews from Inside Line, Automobile mag, Motor Trend, and Motor Authority all mention that the FRS is faster. It's mentioned somewhat in the articles, but any thoughts on why this is the case? I really want to get the BRZ over the FRS, but how do I justify that in light of the FRS being a bit cheaper and faster?

Oooops I meant to post this in the Subaru forum.
That's not entirely true. From the all the articles I've read either one or the other handles better or accelerates faster....I think it was motortrend or car and driver that recently said that the different numbers recorded by these cars are due to driver error and testing conditions. Yes the suspension set ups are different and their weight may differ a little, but the cars are basically identical physically and in terms of speed....
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Old 04-27-2012, 08:41 PM   #63
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In case you missed it, you can see in this video the BRZ and 86 are exactly the same speed. It all just comes down to the driver.

http://www.ft86club.com/forums/showthread.php?t=5462
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Old 04-27-2012, 10:50 PM   #64
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Originally Posted by Spaceywilly View Post
In case you missed it, you can see in this video the BRZ and 86 are exactly the same speed. It all just comes down to the driver.

http://www.ft86club.com/forums/showthread.php?t=5462
Cool video, thanks for sharing. I hadn't seen that yet.
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