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Should spoolup time be plotted on the next RR day

  • No I want to remain ignorant

    Votes: 3 17.6%
  • Yes the information might be usefull

    Votes: 3 17.6%
  • Should Fatman shush and give everyone a break?

    Votes: 11 64.7%
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Discussion Starter · #1 ·
Should spoolup time be plotted on the next RR day

If it isnt are we missing a opertunity to settle arguments
 

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Jesus built my car
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Originally posted by Fatman
> Should spoolup time be plotted on the next RR day

No.

> If it isnt are we missing a opertunity to settle arguments

We are by not banning you from posting.
 

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Discussion Starter · #3 ·
Re: Re: RR Day Spoolup Time

Aidy said:
> Should spoolup time be plotted on the next RR day

No.

> If it isnt are we missing a opertunity to settle arguments

We are by not banning you from posting.
Dont you like a bit of debate
 

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Re: Re: Re: RR Day Spoolup Time

Fatman said:
Dont you like a bit of debate
I like nothing more than arguing black is white...but techie arguing is just plain dull.

If you want to debate maybe we can discuss Atkins vs Pilates?
 

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Discussion Starter · #6 ·
Re: Re: Re: Re: RR Day Spoolup Time

Aidy said:
I like nothing more than arguing black is white...but techie arguing is just plain dull.

If you want to debate maybe we can discuss Atkins vs Pilates ?
:confused: :confused: :confused:
 

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Re: Re: Re: Re: RR Day Spoolup Time

Reims said:
Mas-debating can become tiresome though don't you think? :D
depends on who is doing it and who is simply watching ;)

Fatman?
 

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No it shouldn't because you won't actually see the way the turbo can perform on the road.
Because the loading of the rollers is bound to be different to the loadings on the road, the turbo can be made to produce good spool up by upping the loading of the rollers as the car is coming on boost.

Andy
 

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Discussion Starter · #11 ·
AndyF_RSX said:
No it shouldn't because you won't actually see the way the turbo can perform on the road.
Because the loading of the rollers is bound to be different to the loadings on the road, the turbo can be made to produce good spool up by upping the loading of the rollers as the car is coming on boost.

Andy
Andy

Are you saying that the RR curve can be distorted by the opperator

If so how can this be avoided

Can time plot help indicate or avoid this
 

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Yes, of course it can be distorted by thte operator due to the way in which the r/road works.

All you have to do is alter the loading of the rollers in a gear to give a really high load on the engine and the turbo will spool up quickly. Put a lighter loading on the engine and it won't spool up as quick.

However, as all the cars are generally tested on the same day using the same settings on the rollers then you would be able to see the differences just from looking at a boost curve rather than needing to plot the spool up time, provided that everyone was running the same boost levels.

Andy
 

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Discussion Starter · #13 ·
AndyF_RSX said:
Yes, of course it can be distorted by thte operator due to the way in which the r/road works.

All you have to do is alter the loading of the rollers in a gear to give a really high load on the engine and the turbo will spool up quickly. Put a lighter loading on the engine and it won't spool up as quick.

However, as all the cars are generally tested on the same day using the same settings on the rollers then you would be able to see the differences just from looking at a boost curve rather than needing to plot the spool up time, provided that everyone was running the same boost levels.

Andy
This in away opens a can of worms
To demonstrate that the loading is the same for everyone, is there a value that can be plotted and is hopefully similar to on the road value the will demonstrate all graphs are equal
 

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Rolling roads are not like actual roads anyway, since the engine does not have to push the entire car forwards, it only has to rotate the wheels.

Without an accurate model of air resistance at speed, coupled with the vehicle gross weight, the only thing you are measuring is how hard an engine turns the wheels in 4th gear against a set resistance.

I'm still going along to the Silverstone day, just to see how my atw figures compare to the calculated atw figures using Mitsi's nominal ATF figures for the standard car :cool:

(I'm expecting around 220ftlb and 210bhp at the wheels, give or take)
 
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