Testing weight distribution figure

[Highlandor]

Unlike all other GT games, GT7's weight distribution figure (the split between Fr and Rr i.e. 60/40 or 51/49) doesn't seem to be working as it should(?), or at least, as accurately as it has done in previous games.

So this was a bit confusing for me at first as it didn't change when taking weight off (stage 1-5 weight reduction) or adding weight, like with the MX5 '15 (110kgs) engine swap. So I did a couple of tests to try and get an idea of what the game was doing.

Tried googling it, and checking all the way back through the tuning forum, but couldn't see something specific for this(?), happy to be corrected.

I only had 3 cars that would go to full (stage 5) weight reduction, the idea was to see if there were any changes at each stage. For all 3 cars, at every stage the indicated Fr / Rr weight distribution didn't change, but the Stability and Rotational G figure were, so something was happening.



I then did a similar test (to the engine swap cars - see below) whereby I moved 200kgs of ballast one position at a time, from centre to the heavier end of the car (I was curious to see if the same thing happened with cars that have had weight reduction). But it didn't, it looks like the game is correct when using and moving ballast around, aslong as it's not an engine swapped car - but again, happy to be corrected.



So the Fr / Rr weight distribution figure changes when ballast is applied / moved around, but doesn't change when doing weight reduction?

I also did a very quick test whereby I added ballast back to the GTR and 918 to equal a previous 'stage' of weight reduction and see if there were any changes:

GTR got 192kgs, taking it back up to stage 2 (1479kgs) but I couldn't match the Stability or Rotational G whilst keeping within the range of the original Fr / Rr weight distribution (54/46).

However, doing the same thing to the 918, adding 184kgs (stage 2 @ 1422kgs), no match for the Stability but the Rotational G was a perfect match

0.63 & 1.18 / 1.22 / 1.38​

So, I think:

• Weight reduction doesn't show on a car's Fr / Rr figure, but something is happening according to Stability & Rotational G figures
• This doesn't seem to be the same for ballast, as using this shows a difference in the Fr / Rr figure, as expected
• Unless, you're using ballast on an engine swapped car then it's going to have the opposite affect (see below / post in engine swap thread)
• Even if you use ballast to to return a car to the exact correct weight and weight distribution, there's no guarantee the car will be exactly the same (Stability / Rotational G)
• I need to get out more yaaay, summers nearly here

Engine swap data from quick test, originally posted in engine swap thread but thought I'd add it to here as well as it also shows weird things with weight distribution in GT7. What's different about this is the engine swap cars (admittedly, only tested 3 of them), the Fr / Rr weight distribution should be worse on the engine swap cars because they have more weight going to the heavier end or the car. But they don't,



Smirnoff durability test incoming......