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Question about "Further Weight Reduction"
http://forzatuninglabs.com/forum/viewtopic.php?f=10&t=478
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Author:  Bearak [ Fri Aug 08, 2014 6:20 pm ]
Post subject:  Question about "Further Weight Reduction"

In the "Guide to Class Building" doc included with the FTC download, Section 7 is "Further Weight Reduction". It tells us to purchase and install the driveline upgrade from the Drivetrain section of the Upgrade menu. Specifically, it reads:

Quote:
In order to squeeze out as much weight as possible we will purchase the driveline upgrade under drivetrain.
Select the level that put you once again one point above the performance index goal.
Repeat step 6, compare it to before and after to see if it lost any further weight.
If the vehicle weights less doing this, even if it is one pound, keep it.
If the vehicle weights about the same or more, skip this step.


My question is, when comparing the new weight (before and after), what "before" weight are we looking at? Is it the vehicle weight before applying the driveline upgrade, or after applying it?

For example,
  • if I am tuning a car and I have hit my PI goal...we'll say I'm tuning for A600, so I add upgrades until 601. I then apply progressively heavier rims until the PI drops to 600. We'll say that the car weighs 3077 lbs at this point.

  • Per Section 7, I then buy the driveline upgrade that takes me back to 601 PI, and that lowers the weight to 3065 lbs.

  • Once again, I apply heavier rims until the PI drops back down to 600, and we'll say that makes the vehicle weight 3070.

  • I now need to compare the before and after weights..."after" is 3070, but should the "before" I'm comparing to be the 3077 prior to swapping the driveline, or the 3065 after swapping it?

TIA, Bearak

Author:  SynapticLive [ Mon Oct 13, 2014 12:23 pm ]
Post subject:  Re: Question about "Further Weight Reduction"

let's hear it for active forums ... hopefully in your figured your answer out in the last two months ... but to address your question, I'll take a stab.

The heart of the advise is that weight saved is worth more than power added... which given the PI increase when you add power, you can shave pounds cheaper than you can add ponies. However, as I consider it, there are only a handful of upgrades that actually add weight.

In your example, your using the weight of the wheels to offset a PI increase from a larger wheel diameter. I can certainly appreciate fighting for that -1 PI point right at the point when you've wrestled the rest to where you want it.

I think you're getting mired down by the minutia of the comparison and forgetting the overall intent... save weight. Compare your starting weight to you ending weight... anything in the middle (while appealing and tempting) isn't complete. If you're working for a PI-600 and in the middle you achieved 3065, but had a PI of 601, it's no good, because now the car is in "S" class. Now if you could find a way to have the 3065 AND the PI-600, that would be ideal.

hope that helps.

Author:  Slave Munky [ Wed Feb 04, 2015 3:27 pm ]
Post subject:  Re: Question about "Further Weight Reduction"

Bearak wrote:
In the "Guide to Class Building" doc included with the FTC download, Section 7 is "Further Weight Reduction". It tells us to purchase and install the driveline upgrade from the Drivetrain section of the Upgrade menu. Specifically, it reads:

Quote:
In order to squeeze out as much weight as possible we will purchase the driveline upgrade under drivetrain.
Select the level that put you once again one point above the performance index goal.
Repeat step 6, compare it to before and after to see if it lost any further weight.
If the vehicle weights less doing this, even if it is one pound, keep it.
If the vehicle weights about the same or more, skip this step.


My question is, when comparing the new weight (before and after), what "before" weight are we looking at? Is it the vehicle weight before applying the driveline upgrade, or after applying it?

For example,
  • if I am tuning a car and I have hit my PI goal...we'll say I'm tuning for A600, so I add upgrades until 601. I then apply progressively heavier rims until the PI drops to 600. We'll say that the car weighs 3077 lbs at this point.

  • Per Section 7, I then buy the driveline upgrade that takes me back to 601 PI, and that lowers the weight to 3065 lbs.

  • Once again, I apply heavier rims until the PI drops back down to 600, and we'll say that makes the vehicle weight 3070.

  • I now need to compare the before and after weights..."after" is 3070, but should the "before" I'm comparing to be the 3077 prior to swapping the driveline, or the 3065 after swapping it?

TIA, Bearak


In this case yes, 3070 should be the one you're comparing to the 3077 prior to swapping the driveline.

Basically the point is to compare both A600 builds and decide which is best. The one that weighs less of course.

SM

Author:  Zebastian [ Wed Sep 30, 2015 2:33 am ]
Post subject:  Re: Question about "Further Weight Reduction"

I look forward to this forum very much.

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