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is acd better than non-acd for track use?

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Old Jan 9, 2008 | 03:34 PM
  #46  
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Originally Posted by DaveK
Honestly though...all the top rally teams in PWRC use active diffs, presumably because they just plain work.
The ACDs they have and the ACD that is in my IX are entire different animals though and not really a fair comparison. It would be interesting to find out just how much "Customization" one would need to do at the wheels, sensors, ECU to get the thing to be Rally Worthy. Hmmm....

In the end, for me... I'm thinking of all the EVO IX Rally Cars I've seen drop out of events with "no drive" to the wheels. Suddenly and apparently with no explanation. Turns out to be a broken axle, halfshaft or some other nonsense.

Could it be the ACD "doing its job"?

Consider also the cost of the ACD and its supporting systems. I Break Stuff when I Rally. Plain and Simple. It's a rough sport and I don't mind the horses when a win is on the line.

I really am torn... I have both. I can drive both quickly. Am I taking on a winning advantage or a volatile liability?

THAT is the question. I guess only time will tell.

You and I will be hitting the stages about the same time. If you run with and I run without, we will have a pretty solid benchmark on which to compare. Wouldn't you say?

Certainly though... I am enjoying the conversation

RallyDSM
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Old Jan 9, 2008 | 04:02 PM
  #47  
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Originally Posted by RallyDSM
In the end, for me... I'm thinking of all the EVO IX Rally Cars I've seen drop out of events with "no drive" to the wheels. Suddenly and apparently with no explanation. Turns out to be a broken axle, halfshaft or some other nonsense.

Could it be the ACD "doing its job"?
Interesting stuff, have any links to writeups of cars that have gotten stuck? I was watching Asia/Pacific rally stuff on TV last night and I couldn't beleive all the IX's in the coverage.

I guess you could sum it up as: if you want to win the event go for the ACD, if you want consistency, use the mechanical stuff.

Originally Posted by RallyDSM
The ACDs they have and the ACD that is in my IX are entire different animals though and not really a fair comparison. It would be interesting to find out just how much "Customization" one would need to do at the wheels, sensors, ECU to get the thing to be Rally Worthy. Hmmm....
How is the stuff in your IX different from what's in a Group N car (PWRC)? Sure the front and rear diffs are probably Ralliart parts, but isn't the whole point of Group N to restrict quite a bit of the car to "stock?"

Originally Posted by RallyDSM
You and I will be hitting the stages about the same time. If you run with and I run without, we will have a pretty solid benchmark on which to compare. Wouldn't you say?
I can't wait, though it may be a full season before my car actually sees a rally.

Dave
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Old Jan 9, 2008 | 04:09 PM
  #48  
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From: Jerzey
i see no diffrence with it on any of the settings and i drove other evos without the acd and didnt see a diffrence either
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Old Jan 9, 2008 | 05:10 PM
  #49  
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Originally Posted by DaveK
How is the stuff in your IX different from what's in a Group N car (PWRC)? Sure the front and rear diffs are probably Ralliart parts, but isn't the whole point of Group N to restrict quite a bit of the car to "stock?"
Yes, Group N is supposed to be about a controlled "stock" type class with a list of hop-ups from an approved Vendor list.

However, the JDM/Euro Spec ACD integrated the control of the Active Yaw system which we didn't get here in the States. That makes a difference I think... and that's just the surface. You dig in a bit and I think you will find alot more on that "list" that we don't have access to here in the States.

And, unless you are preparing for Open Class with a Money Cannon slung over your shoulder... I don't think you are going to get all the slick chit on the car that your "Average" Group N car got there.

Weigh that against the fact that Group N has been canceled in the States because of the LACK of participation and support. Don't know if that has anything to do with anything but it could be argued that the "Stock" components of the car in "spec" format simply weren't up the task and alternatives (that would push one into Open) needed to be employed.

Or it could have simply been the big freaking breaks that you cannot get a Rally Tire wrapped around!!!

Either way, I'll bet you now I can win the majority of the time WITHOUT the ACD.

There's a buck on the table buddy. LOL!!!

I can't wait, though it may be a full season before my car actually sees a rally.
I hear ya... I've been lying to myself about having it ready for the first event this year. Not Probable... But I'm still gonna try

RallyDSM
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Old Jan 10, 2008 | 08:54 AM
  #50  
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Some ACD read that has some interesting points:

http://www.btrprep.com/e7_qa.htm
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Old Jan 10, 2008 | 10:53 AM
  #51  
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VERY interesting read. I wonder if the ACD for those 7s/8s are the same one as on the 9 here in the States?

An open class EVO 9 here could move the pump and offer it more protection... so that's a plus too. I'm going to have to look for some room and also check out the steering wheel for the three "pegs" the writeup talked about for steering wheel input sensors. Can't say I noticed them when I was taking apart the 9.

This kind of talk almost sways me back the other way but there were still alot of warnings about using the system in competition. I remain sceptical but as we've mentioned before, the performance is there... the question is whether or not the improved performance is worth the increased risk.

Hmmm.... the saga continues.



RallyDSM
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Old Jan 10, 2008 | 11:01 AM
  #52  
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Further reading on that site reveals:

In relation to their Override Kit they sell it

-allows the driver to lock the centre differential to a variable value should the active system fail due to hard wiring or electronic component failures or a transmission component failure occur – providing a “fail safe” mode. For example, the car can be driven at near full competition speed…even with a driveshaft broken…this is not possible with the system under active control
Is that saying what I think it is saying... that the stock system won't allow the car to drive with an broken axle (think CV joint, wheel missing, axle, sensor, etc)?

RallyDSM
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