More BHP does not always equal more PP?

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CloneHead

CloneHead

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ZombieInfected
So, I was tuning and tweaking my newly aquired Aston Martin Vantage today, and I noticed something strange:

Standard Exhaust: 899 BHP - 575PP
Racing Exhaust: 965 BHP - 566PP
So, I'm wondering why the PP goes down when the bhp goes up??
Anyone else experience this?

Sorry for the crappy phone pics.

Standard Exhaust
http://postimage.org/image/6ghx8ff4h/
Strange racing Exhaust:
http://postimage.org/image/e2h3s37sj/

I don't really get the logic behing the PP
 
Last edited:
The Buick Special is the same. I have one fully tuned in my tuning garage and it's at just over 550pp. Add weight and take off parts and it can get to over 600pp. :odd:
 
CloneHead
So, I was tuning and tweaking my newly aquired Aston Martin Vantage today, and I noticed something strange:

Standard Exhaust: 899 BHP - 575PP
Racing Exhaust: 965 BHP - 566PP
So, I'm wondering why the PP goes down when the bhp goes up??
Anyone else experience this?

Sorry for the crappy phone pics.

Standard Exhaust
http://postimage.org/image/6ghx8ff4h/
Strange racing Exhaust:
http://postimage.org/image/e2h3s37sj/

I don't really get the logic behing the PP
Click to expand...

You have to remember that Performance Points calculations don't just include how much bhp the car has and how much it weighs. It also includes a number of other factors including the power bandwidth, aerodynamics and much more.
 
Well, both torque and BHP goes up when putting racing exhaust on, so why would PP go down? It doesn't make sense. As far as I remember power to weight ratio is the same, changing exhausts.

Areodynamics should be the same as well.

I find it strange, since I always thought that power/weight/downforce were the only factors. Where did you read that power bandwidth, aerodynamics and more is calcualted?
 
CloneHead
Well, both torque and BHP goes up when putting racing exhaust on, so why would PP go down? It doesn't make sense. As far as I remember power to weight ratio is the same, changing exhausts.

Areodynamics should be the same as well.

I find it strange, since I always thought that power/weight/downforce were the only factors. Where did you read that power bandwidth, aerodynamics and more is calcualted?
Click to expand...

By aerodynamics I meant downforce created by the aero parts that may be installed on the car. And I know that power bandwidth is calculated because I read a thread similar to this but instead they installed a Stage 3 turbo system and the PP went down while the BHP went up. And now that you mentioned it, I think it's no longer normal for this to happen if the torque and BHP goes up and nothing else really changes. I think this is a glitch with the game now.
 
There have been other threads about this. I think the theory is that you can get too much power for the car, and it becomes detrimental to the handling and ability to use the power.
 
Woodski_427
There have been other threads about this. I think the theory is that you can get too much power for the car, and it becomes detrimental to the handling and ability to use the power.
Click to expand...

I think this is the most likely explanation, but that means that car handling is also taken into consideration when calculating the PP value for a car. But then that would mean your suspension settings would be taken into consideration because suspension settings affect handling.
 
It's a bell curve with power / weight / aero (maybe dimensions of car or characteristics particular to that car).

Caterham and racing karts getting insane pp is one end of the curve, speed 12 and vantage is the opposite end of the curve.

I love trying to drive them full hp/ least kg. but they cant get traction and the traction control still makes you slower than just pulling power or adding weight.

If you do all hp/weight mods on a vantage, the pp will begin to drop, but when your all done add a wing! Instead of the wing adding 6-10 pp like most cars, it adds like 35-40 pp.. Same with speed 12.
 
Agreed. Logic tells us that the more power a car has, it has to be able to transfer the kinetic energy it produces to the tarmac. Cars that spin there wheels up (Gillet Vertigo) and have ridiculous amounts of BHP (Gillet Vertigo) and have useless brakes (Gillet Vertigo) tend to suffer from a downgrade in PP.

For example, I fitted a Stage 3 Turbo Kit to the Gillet Vertigo :lol: and it lost about 30 PP, just because the car cannot put that much Power down on the tarmac. Weirdly, the PP system actually follows the laws of physics to an extent. Either way, to fix the problem, increase downforce or add Ballast. No other way you can solve this unfortunatly.
 
I thought putting 440lbs of ballast on my Speed 12 may make things better... nope more weight - more of a Beast to drive...more PPs

TVR throws the rule book out of the window
 
Initially, if a car gains bhp, but pp drop, it's because the powerband is affected.

Car A: Pointy powerband / 600 bhp / 600 pp
Car B: Wide powerband / 590 bhp / 605 pp

Car B got a higher pp rating due to a higher average bhp output

The above scenario is the case in 99,9% of the cases.

Remember that a higher peak tourqe does'nt automaticly meen a higher average tourqe.
This is very important to understand when trying to fighure out why the pp's are what they are.

I've never seen or experianced in any way that probability of wheelspin and worse handling affects pp in any way.


However, GT5 is what it is, and the fact that there's glitches in the game is well known. So perhaps the car that the OP referes to is affected by a glitch, or you're not looking at the numbers correctly.

By the numbers tho, it looks like a glitch.
Cause I have a hard time to see that a bhp boost of 66 bhp can lower the pp by 11. :confused:
I'm going to test it my self, and report back when I have. 👍
 
I think so too.. But since it's easy to straight out, I will. 👍
 

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