Quick revs
Thread Starter
Race Director
Joined: Oct 2000
Posts: 16,477
Likes: 1
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Quick revs
I have the game, Gran Tourismo III, and in that game, if you balance the rotating assembly, the car revs quicker. I thought this wasn't true, and just something they added to the game.
But on Saturday, I got into a revving match next to a quick ricer, and I was surprised at how quickly my car revs. It used to outrun the tach, now the tach doesn't even try, it just sits at the 900 rpm idle until I get off the gas. I didn't think I did anything that would make it rev considerably quicker, but it does. The only thing I can think is the balancing.
1987 Corvette
Here's the mods:
TRW Forged Pistons
10.78:1 compression
Cast Iron Crank Shaft, balanced to 5 grams. The crank shaft is a reground setup, and although I didn't ask for it, or pay for it, it is knife-edged.
Clevite bearings
Melling Highflow oil pump
2800 stall torque converter, stock diameter
Non-mods
The rods are stock 5.7 inch setups
Stock Flexplate
Airpump is still on the car
Are any of these the big one, or do they all work together?
But on Saturday, I got into a revving match next to a quick ricer, and I was surprised at how quickly my car revs. It used to outrun the tach, now the tach doesn't even try, it just sits at the 900 rpm idle until I get off the gas. I didn't think I did anything that would make it rev considerably quicker, but it does. The only thing I can think is the balancing.
1987 Corvette
Here's the mods:
TRW Forged Pistons
10.78:1 compression
Cast Iron Crank Shaft, balanced to 5 grams. The crank shaft is a reground setup, and although I didn't ask for it, or pay for it, it is knife-edged.
Clevite bearings
Melling Highflow oil pump
2800 stall torque converter, stock diameter
Non-mods
The rods are stock 5.7 inch setups
Stock Flexplate
Airpump is still on the car
Are any of these the big one, or do they all work together?
Race Director
Joined: May 2001
Posts: 14,165
Likes: 9
Re: Quick revs (NoWorries)
It's all rotating mass. Take a car setup for an auto, take the torque converter off and watch how fast the thing revs. It's because the auto "flex-plate" flywheel in common terms weighs a lot less than one for a manual.
That's why if you buy a lightweight flywheel your car will rev faster, but it will be a little more difficult to drive until you get used to it. The quicker the motor revs the quicker it will slow down, the loss of inertia works both ways. A lightweight flywheel is easier to stall.
If I remember right from the game anyway, isn't the balancing basically to make it rev farther, like an extra 1000 rpms or so? The racing flywheel is to make it rev faster. For a silly game it's pretty accurate.
That's why if you buy a lightweight flywheel your car will rev faster, but it will be a little more difficult to drive until you get used to it. The quicker the motor revs the quicker it will slow down, the loss of inertia works both ways. A lightweight flywheel is easier to stall.
If I remember right from the game anyway, isn't the balancing basically to make it rev farther, like an extra 1000 rpms or so? The racing flywheel is to make it rev faster. For a silly game it's pretty accurate.
Race Director
Joined: Sep 2000
Posts: 17,298
Likes: 33
From: The Top of Utah
Re: Quick revs (NoWorries)
In my humble opinion:
60 % Compression
30 % Balance
10 % knife edge
If anything, I think I may have under rated the compression and over rated the knife edge. The knife edge AND the balance become more of an advantage as the revs become elevated. The compression provides the sharp, crisp throttle response and better performance throughout the range.
[Modified by CFI-EFI, 5:18 PM 3/5/2002]
60 % Compression
30 % Balance
10 % knife edge
If anything, I think I may have under rated the compression and over rated the knife edge. The knife edge AND the balance become more of an advantage as the revs become elevated. The compression provides the sharp, crisp throttle response and better performance throughout the range.
[Modified by CFI-EFI, 5:18 PM 3/5/2002]
