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Old 19-05-2017, 12:57   #16
kikiturbo
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Is AYC remapped? Thought it was only ACD?
the acd/ayc maps are not fully cracked yet so this needs some more investigation...
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Old 19-05-2017, 13:01   #17
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Is AYC remapped? Thought it was only ACD?
Not fully - you're quite right. The explanation of how it works was the point of the post.

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Old 19-05-2017, 13:43   #18
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So the ayc is the best for road and track?
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Old 19-05-2017, 13:57   #19
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So the ayc is the best for road and track?
Active diffs (things like AYC) were banned from WRC for being too effective
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Old 19-05-2017, 14:13   #20
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So the ayc is the best for road and track?
AYC is - technically - able to lap a circuit faster.

However, a lot is down to personal preference.

I've long maintained that on a track day *my* objective is to have fun - and I get that enjoyment, mainly, from how the car feels to drive. I like the way AYC feels. I love the way you can feel the car rotate ever so slightly around a point between the front and rear seats without loss of traction or grip, just hooked up, turning and accelerating, while taking that little smidgeon of steering angle off to keep the car turning on the desired line

However, others prefer the feel and handling of a LSD equipped car.

Yet others find their "fun" from finding the fastest lap time - regardless of whether the car feels like a dog to drive or not.

A lot is simply personal preference.
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Old 19-05-2017, 14:39   #21
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But is the ayc 480lb/ft capable for long time?
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Old 19-05-2017, 14:52   #22
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Best to go back and read the posts again mate?

Its not easy to predict time to failure.. But on previous peoples findings on AYC that is generally accepted to be a one way ticket.

Listen to what Clive says, he knows what he's talking about.

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But is the ayc 480lb/ft capable for long time?
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Old 19-05-2017, 15:14   #23
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But is the ayc 480lb/ft capable for long time?
depends on how you drive it..
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Old 19-05-2017, 15:16   #24
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A lot is simply personal preference.
thing about AYC is that it is easier to adapt it to different circumstances... as a plate LSD has to be taken off and adjusted to be optimal for different types of use..
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Old 19-05-2017, 15:40   #25
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Without launch just full gaz in track or road

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depends on how you drive it..
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Old 19-05-2017, 15:49   #26
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Supposedly Ralliart ECU had both ACD and AYC remapped, while all ACD recaps seem to focus on ACD only.
That likely because AYC logic is still illusive.

FYI
Never meant to imply AYC was robust to infinity, as mechanical engineer and long term Evo owner I get AYC weaknesses.

But: Professional Awesome Time Attack team in US successfully raced their EUDM Evo 7 with AYC, preferring AYC, and upgraded to Evo X AYC for more torque vectoring, without breakage until one day an incident destroyed the car and they had to move to USDM platform without AYC
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Old 19-05-2017, 15:57   #27
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But is the ayc 480lb/ft capable for long time?
Probably have a reduced lifespan at that level. Already said that in post #9 above.

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Old 19-05-2017, 15:58   #28
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This point about the car pivoting, scared the hell out of me first couple times I felt it in the X. Being my first evo, I just thought the car was trying to oversteer. Takes a little getting used to, it's obviously a very effective tool for driving fast around bends thoug
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Old 19-05-2017, 16:54   #29
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Originally Posted by chris_mak View Post
Thanks for the advice. You've worked on the car already mate, you remapped it for me a little while back. I've been meaning to book it in. There's a knock at the back I was going to have looked at and timing belt wants done too. I'll probably give you a call next week some time
Ok mate no problem just give us a call and we can work out a date 👍
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Old 19-05-2017, 19:46   #30
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Originally Posted by Rampant View Post
I agree with both of you.

alpinaturbo - I agree with you that the AYC diff is a far superior setup than a locking RS diff in terms of handling characteristics (although this can be a personal preference thing) and corner speed/lap times achievable (which is not a personal opinion, rather a matter of fact)

Clivew - I agree with you that the AYC rear diff is not as robust as the RS diff unit. It is still normally robust enough for cars running 400-450, is it not. After that point, the AYC tends to be more fragile than the RS equivalent...

Thoughts?

Mark H
My post wasn't a 'which is the better diff' it was replying to Ivicas post on the strength of the AYC diff. I personally think for a road car, and for most people, the AYC diff is better,

Last edited by Clivew; 19-05-2017 at 19:50..
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