LSD effect on torque steer

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dazjb
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LSD effect on torque steer

Post by dazjb »

Having a VR4 powered FTO I have a big issue with torque steer .. on hard throttle the car wants to pull you onto the other side of the road, even when your pointing in a straight line. I have a gearbox with LSD waiting to go on thinking it would help with the torque steer but have read that adding an LSD will make torque steer worse .. but will reduce wheelspin and help with understeer when cornering hard.

For you guys running turbo FTOs did fitting an LSD help with torque steer?

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Bennoz
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Re: LSD effect on torque steer

Post by Bennoz »

Nope. Lol.

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dazjb
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Re: LSD effect on torque steer

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Ah balls .. thought it would help out with it. Don't know whether it's worth bothering with it then, I haven't bought it yet and would save myself £350. I don't track the car but do take it drag racing.
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Re: LSD effect on torque steer

Post by silverGPX »

I've driven a 6a13tt with open diff and didn't really torque steer, it felt slow because it was just all wheel spin in 1st and 2nd


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Re: LSD effect on torque steer

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dazjb wrote:Ah balls .. thought it would help out with it. Don't know whether it's worth bothering with it then, I haven't bought it yet and would save myself £350. I don't track the car but do take it drag racing.
You can iron it out a bit with suspension tweaks. Not too much neg camber & a touch of toe in can scrub off a bit of it.

I also found having a front lower chassis H brace helped too. Stopped the twist.
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Re: LSD effect on torque steer

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Bennoz wrote:
dazjb wrote:Ah balls .. thought it would help out with it. Don't know whether it's worth bothering with it then, I haven't bought it yet and would save myself £350. I don't track the car but do take it drag racing.
You can iron it out a bit with suspension tweaks. Not too much neg camber & a touch of toe in can scrub off a bit of it.

I also found having a front lower chassis H brace helped too. Stopped the twist.
I definitely noticed an improvement with the H brace as well.

I don't see why you wouldn't opt for an LSD if you could, considering you've already gone to the expense of turboing it :lol:
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Re: LSD effect on torque steer

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bjk wrote:
Bennoz wrote:
dazjb wrote:Ah balls .. thought it would help out with it. Don't know whether it's worth bothering with it then, I haven't bought it yet and would save myself £350. I don't track the car but do take it drag racing.
You can iron it out a bit with suspension tweaks. Not too much neg camber & a touch of toe in can scrub off a bit of it.

I also found having a front lower chassis H brace helped too. Stopped the twist.
I definitely noticed an improvement with the H brace as well.

I don't see why you wouldn't opt for an LSD if you could, considering you've already gone to the expense of turboing it :lol:
The difference you noticed was the car being slower because of all the extra weight and no turbo. :lol:
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Re: LSD effect on torque steer

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Vectose wrote:
bjk wrote:
Bennoz wrote:
dazjb wrote:Ah balls .. thought it would help out with it. Don't know whether it's worth bothering with it then, I haven't bought it yet and would save myself £350. I don't track the car but do take it drag racing.
You can iron it out a bit with suspension tweaks. Not too much neg camber & a touch of toe in can scrub off a bit of it.

I also found having a front lower chassis H brace helped too. Stopped the twist.
I definitely noticed an improvement with the H brace as well.

I don't see why you wouldn't opt for an LSD if you could, considering you've already gone to the expense of turboing it :lol:
The difference you noticed was the car being slower because of all the extra weight and no turbo. :lol:
Also true lol.

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dazjb
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Re: LSD effect on torque steer

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I was all set and looking forward to putting the LSD on but the last thing I needed was something that gave the car even worse torque steer. I'll stick it on and see how I get on .. I can always swap over the gearbox again if I don't like the result.

Will ask around on the FTOOC, see if anybody has a lower H brace going as well then look at getting the alignment sorted.
silverGPX wrote:I've driven a 6a13tt with open diff and didn't really torque steer, it felt slow because it was just all wheel spin in 1st and 2nd
If you think a 0-60mph time of 5 seconds is slow a standard FTO must feel like a lifetime getting to that speed [emoji3]. It's all about feathering the throttle.
Last edited by dazjb on Thu Feb 23, 2017 9:44 pm, edited 1 time in total.
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Re: LSD effect on torque steer

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LSD doesn't just help in a straight line.
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dazjb
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Re: LSD effect on torque steer

Post by dazjb »

Daniel2019 wrote:LSD doesn't just help in a straight line.
Yeah I know it benefits most on corner entry/exit. Was just hoping it would tame the ditch finding torque steer a bit as well.
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Re: LSD effect on torque steer

Post by MADFTO »

Sounds like you've bump steer as well as torque steer?

Torque steer should be fairly predictable.

LSD could help but I can't think why it'd make it worse. Whole point is to balance torque between the two axles.

See how you go after the LSD install.

If it does nothing it could be due to suspension geometry or uneven axle lengths. But one thing at a time :)

Side note, I like the horse and carriage explanation of torque steer. Somehow seems appropriate.


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Re: LSD effect on torque steer

Post by Daniel2019 »

If you didn't want torque steer why did you put a 6A13 into a FWD car? Even the 6A12 torque steers a little bit..
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Re: LSD effect on torque steer

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Daniel2019 wrote:If you didn't want torque steer why did you put a 6A13 into a FWD car? Even the 6A12 torque steers a little bit..
I never said I didn't want torque steer, I expected it and I said I wanted to reduce it. Who wouldn't!
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Re: LSD effect on torque steer

Post by silverGPX »

Some custom driveshafts is your best bet. Ones that use an intermediate shaft.

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Re: LSD effect on torque steer

Post by silverGPX »

I imagine Richard batty would have to use them?


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Re: LSD effect on torque steer

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I've got them in my mini
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Re: LSD effect on torque steer

Post by Daniel2019 »

That's the best solution. That's what that intermediate shaft is specifically designed for.

Man up though, I say :lol:
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dazjb
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Re: LSD effect on torque steer

Post by dazjb »

Yep, same length driveshafts is something I could look at down the line when my engineering mate fancys a bit of a project. For now though I'm fitting the LSD, getting a 4 wheel alignment then searching for a H brace.

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Re: LSD effect on torque steer

Post by spetz »

Magnas run intermediary shafts and have the same diffs as FTOs so perhaps this might not be too difficult to make work
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