130 replies to this topic

[NOSBandit]

I'm thoroughly confused by this thread.

Me too. Logically i question the original readings.

I'm surprised as well. It's a very high torque for just over 3k, that's why it would be interesting to see the whole dyno sheet

[slindborg]

The whole sheet is on the first page... its a sh*t plot though

[LordRagnar]

The whole sheet is on the first page... its a sh*t plot though

 

Ignore that first one its not correct, that was the very first one that was done its totally inaccurate.

 

I have the correct one that i'll post later.

[Andy_VX]

All sounds a bit odd to me, surely someone can clarify the ABS issue after a decade of tuning these cars? 

 

How does it actually feel to drive now, much improved from the last map? 

[LordRagnar]

Well the first reading didn't seem accurate (the reading i posted) and the mapper (Rabbid) said it didn't look right either so said remove the fuse and see what happens once we did that the reading went from 161bhp to 231hp but torque reading was 371lbs so he then re mapped it and its now 238hp and 300lbs torque, The drive feels a lot more progressive than before, before the remap it would accelerate like a speeding bullet, then according to the dyno would slump in power then pick up again now the slump has been ironed out and it holds power throughout the rev range. 

 

I know a lot of you can't get your head around the fuse issue and as i'm nowhere near an expert on this its literally all i can tell you.

[Andy_VX]

I assume the original RR results were done somewhere in Plymouth and then you went to Rabbid in Basingstoke for the mapping? 

[LordRagnar]

It was all done in Plymouth Rabbid re maps for AK Motorworx remotely. 

[garw]

I can explain the ABS thing with logic

 

The only link between ABS module and ECU is the speed signal ,  the same speed signal that goes to the instrument cluster

 

So the the power is cut by the ecu because of the speed

 

ABS fuse out ,  speed signal gone

 

I have looked over the circuits because I am genuinely interested in this stuff,   

 

given all the evidence this is the only conclusion 

 

 

[Andy_VX]

I can explain the ABS thing with logic

 

The only link between ABS module and ECU is the speed signal ,  the same speed signal that goes to the instrument cluster

 

So the the power is cut by the ecu because of the speed

 

ABS fuse out ,  speed signal gone

 

I have looked over the circuits because I am genuinely interested in this stuff,   

 

given all the evidence this is the only conclusion 

 

 

 

This doesn't make sense because the speed signal comes from the nearside rear wheel sensor which would be giving the correct speed reading?? 

[garw]

Well the first reading didn't seem accurate (the reading i posted) and the mapper (Rabbid) said it didn't look right either so said remove the fuse and see what happens once we did that the reading went from 161bhp to 231hp but torque reading was 371lbs so he then re mapped it and its now 238hp and 300lbs torque, The drive feels a lot more progressive than before, before the remap it would accelerate like a speeding bullet, then according to the dyno would slump in power then pick up again now the slump has been ironed out and it holds power throughout the rev range. 

 

I know a lot of you can't get your head around the fuse issue and as i'm nowhere near an expert on this its literally all i can tell you.

 

 

I think lb ft  is getting confused with nm

 

original reading shows 261 lb ft   which is 352 nm

 

http://www.convertun...om/lb-ft/to/N-m

 

300nm  seems correct for 230 hp 

[slindborg]

 

I can explain the ABS thing with logic

 

The only link between ABS module and ECU is the speed signal ,  the same speed signal that goes to the instrument cluster

 

So the the power is cut by the ecu because of the speed

 

ABS fuse out ,  speed signal gone

 

I have looked over the circuits because I am genuinely interested in this stuff,   

 

given all the evidence this is the only conclusion 

 

 

 

This doesn't make sense because the speed signal comes from the nearside rear wheel sensor which would be giving the correct speed reading?? 

 

 

the speed signal from the sensor still has to go via the ABS control unit prior to hitting the powertrain controller.

 

 

[LordRagnar]

I can explain the ABS thing with logic

 

The only link between ABS module and ECU is the speed signal ,  the same speed signal that goes to the instrument cluster

 

So the the power is cut by the ecu because of the speed

 

ABS fuse out ,  speed signal gone

 

I have looked over the circuits because I am genuinely interested in this stuff,   

 

given all the evidence this is the only conclusion 

 

 

 

This sounds exactly like what i was told.

[ditonics]

This is being made complicated. When others have their car on a RR do they have to take the abs fuse out too? Kinda curious now.

[LordRagnar]

 

Well the first reading didn't seem accurate (the reading i posted) and the mapper (Rabbid) said it didn't look right either so said remove the fuse and see what happens once we did that the reading went from 161bhp to 231hp but torque reading was 371lbs so he then re mapped it and its now 238hp and 300lbs torque, The drive feels a lot more progressive than before, before the remap it would accelerate like a speeding bullet, then according to the dyno would slump in power then pick up again now the slump has been ironed out and it holds power throughout the rev range. 

 

I know a lot of you can't get your head around the fuse issue and as i'm nowhere near an expert on this its literally all i can tell you.

 

 

I think lb ft  is getting confused with nm

 

original reading shows 261 lb ft   which is 352 nm

 

http://www.convertun...om/lb-ft/to/N-m

 

300nm  seems correct for 230 hp 

 

 

You have to remember that original reading was completely wrong. It can almost be ignored as it wasn't a true reading. didn't know that at the time but we do now.

 

The only readings that came from the dyno are in lbs/ft

[LordRagnar]

This is being made complicated. When others have their car on a RR do they have to take the abs fuse out too? Kinda curious now.

 

To find out i'd suggest whoever is planning on a dyno run in the future do one with the fuse in and one with the fuse out and see if it makes a difference.

[Andy_VX]

Mine is going to Rabbid on the 4th so i'll get 2 readings with fuse in and fuse out. 

 

I have the front near side sensor disconnected will this have the same effect as removing the fuse for this purpose? 

[ditonics]

So many people have had their vx on a RR i would of thought it would been known already.

[Andy_VX]

So many people have had their vx on a RR i would of thought it would been known already.

 

I expect is has something to do with the specific RR as I've had an accurate reading with the ABS connected. 

[siztenboots]

 

This is being made complicated. When others have their car on a RR do they have to take the abs fuse out too? Kinda curious now.

 

To find out i'd suggest whoever is planning on a dyno run in the future do one with the fuse in and one with the fuse out and see if it makes a difference.

 

 

None of my clients have ever had to disable ABS when using my maps which are VX220 optimised.

 

The speed signal is part of the cruise control logic and automatic gearbox torque limiter controls. Both systems found on Zafira ECU software ....

[LordRagnar]

Honestly I don't know theres nothing more I can add or say to help i'm a mapping expert or dyno expert.

 

The simple fact of the matter is my fuse had to be removed to give an accurate dyno reading it didn't have to be disabled to use a map just to give a correct dyno reading. Maybe Andy_VX can ask Rabbid on the 4th as to why.