Tuning for grip

[arronm]

Two cars, two tunes, same stock turbo, similar boost, similar peak power. Both on 98. Both manual.

 

One comes on boost like a light switch and frys the tyres in the first 3 gears. The other grips from second on wards, short shift to second and floor it and off you go full grip.

 

Its not all in the tune, but some is. There are many ways to control boost. And even a few most people arnt aware of.

 

These dyno graphs are old but good for comparison.

 

The BA with the blue curve was dead valve springs.

 

NOTE RPM on the X axis, makes for easy interpretation. Just wish all tuners did the same.

 

 

[Ralph Wiggum]

Impressive power for a 4.0CI motor

[arronm]

Yep.  Can't even spell my name right either. 

[Ralph Wiggum]

You know you've got bad spelling when you spell A.r.r.o.n.....T.o.d.d

 

All joking aside, this is one of the reasons I use an Eboost2 for boost control. Once it and the car are setup properly you can have several boost curves that are accessible via pressing 1 button.

[JETURBO]

So what's the point of this thread again, one smacks nearly 21psi as fast as it can make it and the other ramps up to 19psi and it's not in the tune ? 

 

have a look at the road speed and the rpm, transfer across to any manual sedan dyno graph for easy interpretation 

 

were both of these on P100 like you used to use or true raw 98 ? I think I remember you saying you always used P100 now mix it up with 98/85 

Edited 23/11/16 08:36 AM by JETURBO

[Puffwagon]

I'll just leave this here.

 

F=M x A.

 

Anything moving from slow to fast will have this equation as part of the reason it broke whether it's a rod bending or a tyre breaking traction.

 

  On 23/11/2016 at 7:38 AM, arronm said:

There are many ways to control boost. And even a few most people arnt aware of.

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The best way I've found to control boost in my car is to make the missus drive.

Edited 23/11/16 08:56 AM by Puffwagon
Remove useless comment

[arronm]

  On 23/11/2016 at 8:33 AM, JETURBO said:

So what's the point of this thread again, one smacks nearly 21psi as fast as it can make it and the other ramps up to 19psi and it's not in the tune ? 

 

have a look at the road speed and the rpm, transfer across to any manual sedan dyno graph for easy interpretation 

 

were both of these on P100 like you used to use or true raw 98 ? I think I remember you saying you always used P100 now mix it up with 98/85 

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I think you need to read and look more carefully at what I posted. 

[JETURBO]

Yeh but what's the point ? Or is there no point and just a general thread , did I miss some deleted posts or a thread or something ??

[BAXRTUTE]

 

one leaves skids the other is drivable due to tuning for the every day driver.

 

Though im with jet.. what is the thread point of abc? 

Edited 23/11/16 09:37 AM by BAXRTUTE

[skidxr6t]

I find if I slam the throttle quickly I get a sh1tload of power all of a sudden, but if I roll it on to full throttle slowly it isn't the same. edit: what I meant to ask about this is basically if this is something that can be tuned? the speed at which the throttle is pressed meaning the faster it's pressed the more crazy the car becomes.

 

I also tend not to launch my car, its something that has always ended up in wheelspin :( anyway I can't pass judgment on my cars tune because of the wastegate issue but I must say, it is very nice for cruising around town with a casual tutututututu from normal acceleration every so often lol!

Edited 23/11/16 09:43 AM by skidxr6t