Thread: Difference between tunes?

Originally Posted by AK83

I've also had very recent dealings with Shack .. and having a TRS tune in mine(done by previous owner) ... Shacks has transformed mine into an awesome engine now.
Mine's auto too.

The more I drive it(been about a week and a bit now) the more it reveals itself.
This arvo coming home 'a different way' I was in 3rd (locked) coming up a slight incline.
Before Shacks mods to the TRS tune, I know it would have lagged then kicked down into 2nd from an unlocked 3rd.(been there done that).
But his tune now pulls immediately effortlessly from down into the 1400rpm range, stays locked(thanks to the V8 Trans ECU) and just pulls like a freight train .. no fuss!

Had to catch up with brother early in the week, and he drove it and .... .... massive smile on his face.

Highjack, but on topic

So, when bought, my car had an early 1999 TD5 ECM with a Bruce Davis power upgrade - it's an early TD5/injectors so doesn't use the later "standard" reprogrammable ECU. I believe though, Bruce fits a reprogrammable chip to these earlier ones, so they can now be redone/changed easier/cheaper. .

What I'd love to have is access to 4th lockup in the ZF 4HP24 without having to hit 80 ie no more than 69 would be nice, as I seem to travel on a lot of 70 kmph roads.

How difficult/expensive is this likely to be if possible?

Originally Posted by gavinwibrow

Highjack, but on topic

So, when bought, my car had an early 1999 TD5 ECM with a Bruce Davis power upgrade - it's an early TD5/injectors so doesn't use the later "standard" reprogrammable ECU. I believe though, Bruce fits a reprogrammable chip to these earlier ones, so they can now be redone/changed easier/cheaper. .

What I'd love to have is access to 4th lockup in the ZF 4HP24 without having to hit 80 ie no more than 69 would be nice, as I seem to travel on a lot of 70 kmph roads.

How difficult/expensive is this likely to be if possible?

About 100 dollars if you score the right part number Transmission control module from a D2 V8, easy fit.

I have tried 2 but kickdown too sensitive but have a third on the way.

Originally Posted by gavinwibrow

Highjack, but on topic

So, when bought, my car had an early 1999 TD5 ECM with a Bruce Davis power upgrade - it's an early TD5/injectors so doesn't use the later "standard" reprogrammable ECU. I believe though, Bruce fits a reprogrammable chip to these earlier ones, so they can now be redone/changed easier/cheaper. .

What I'd love to have is access to 4th lockup in the ZF 4HP24 without having to hit 80 ie no more than 69 would be nice, as I seem to travel on a lot of 70 kmph roads.

How difficult/expensive is this likely to be if possible?

I should clarify...

The "mod" to run the V8 Auto controller would require a remap if you want to avoid the "kickdown when not required" scenario.

AK83 had a remap already, but to avoid the kickdown issue more changes were needed that were probably not known about when his was originally done.

Simply fitting the V8 unit will not provide satisfactory performance if:

1. You are running stock tuning.

2. You are running on older style remap.

The issue for guys that are running MSB****** ECU's is that they are not easily remapped even if they have been fitted with socketed chips, as a heap more gear is required to do it.

I do not really feel inclined to learn, although the MSB unit is not without benefits.

AK83's tune was "simply" modified, it's not running any more fuel than before, although I doubt he believes that.

Cheers
James

Just for interest sake, I popped in a "chipped" MSB I had laying around.

Ran some logging data, tried to do some mathematics, and came to the conclusion that the ECU I was checking is putting out VERY ROUGHLY about 380nm torque at 2krpm, and 111kw at 3800 rpm.

These are only calculated estimates at the flywheel.

It doesn't really go very well!

Cheers
James

Originally Posted by shack

....

AK83's tune was "simply" modified, it's not running any more fuel than before, although I doubt he believes that.

Cheers
James

Good that James clarified the inner workings of the retuned file I then uploaded.

It is hard to comprehend that it's not running 'any more fuel' than before tho, but it's easy to believe.

previous two full tanks netted me 7.99 and 8.02km/lt(whatever that converts to in lt/100km).

I had used half a tank before I uploaded Shacks retune/mod, and already explained the vastly improved driveability and better use of the already torquey feel of the motor.
But on half a tank already used .. so with half a tank remaining, the last fill(ie. half with with Shacks mod) I got 8.47km/lt.

This current tank(only down to 140km used) I suspect will show even less fuel use I'm kind'a guessing into the high 8's km/lt .. or about 11ish lt/100 ...
So, to reply to James comment that I would doubt there is more fuel being fed .. nope! fully believe it .. just hard to comprehend it.
My driving mix is 50/50 freeway (to work and back) and pickup the missus to city and back via dense urban rubbish.

The highway component has room for improvement by removing the hideous(and heavy) roof rack too.

Car has been neglected somewhat by brother .. even tho I tried hard to coach him into keeping on top of this and that.

At the moment, a part of the 'this and that' neglectfulness is a broken manifold stud, extremely likeleyhood of a warped manifold(not yet debwebbed), and a small list of other things I need to look into(once lockdown starts to ease up a bit).

I have a strong suspicion that engine mounts have caved too. engine feels a bit more rough than I initially remember it(although could just be exhaust) ..

my experience is that a modded TD5 map with v8 trans ecu PLUS a well retuned map for it .. will work as Gavin wants and better!

Originally Posted by johnp38

About 100 dollars if you score the right part number Transmission control module from a D2 V8, easy fit.

I have tried 2 but kickdown too sensitive but have a third on the way.

Thanks, I have every confidence you will update us when you succeed, and if you find a second one, please let me know.

Originally Posted by AK83

Good that James clarified the inner workings of the retuned file I then uploaded.

It is hard to comprehend that it's not running 'any more fuel' than before tho, but it's easy to believe.

previous two full tanks netted me 7.99 and 8.02km/lt(whatever that converts to in lt/100km).

I had used half a tank before I uploaded Shacks retune/mod, and already explained the vastly improved driveability and better use of the already torquey feel of the motor.
But on half a tank already used .. so with half a tank remaining, the last fill(ie. half with with Shacks mod) I got 8.47km/lt.

This current tank(only down to 140km used) I suspect will show even less fuel use I'm kind'a guessing into the high 8's km/lt .. or about 11ish lt/100 ...
So, to reply to James comment that I would doubt there is more fuel being fed .. nope! fully believe it .. just hard to comprehend it.
My driving mix is 50/50 freeway (to work and back) and pickup the missus to city and back via dense urban rubbish.

The highway component has room for improvement by removing the hideous(and heavy) roof rack too.

Car has been neglected somewhat by brother .. even tho I tried hard to coach him into keeping on top of this and that.

At the moment, a part of the 'this and that' neglectfulness is a broken manifold stud, extremely likeleyhood of a warped manifold(not yet debwebbed), and a small list of other things I need to look into(once lockdown starts to ease up a bit).

I have a strong suspicion that engine mounts have caved too. engine feels a bit more rough than I initially remember it(although could just be exhaust) ..

my experience is that a modded TD5 map with v8 trans ecu PLUS a well retuned map for it .. will work as Gavin wants and better!

Just to clarify, my version runs about 420 N/m as the PO convinced Bruce Davis the upgraded 4HP24 replacement transmission fitted could handle more than the standard 400 Nm max applied to automatic 4HP22s. Apparently the engine max torque/power is ultimately controlled by the gearbox ECU!

Originally Posted by gavinwibrow

Just to clarify, my version runs about 420 N/m as the PO convinced Bruce Davis the upgraded 4HP24 replacement transmission fitted could handle more than the standard 400 Nm max applied to automatic 4HP22s. Apparently the engine max torque/power is ultimately controlled by the gearbox ECU!

I have hours of really detailed logging.

The only time the Auto controls the engine output is basically on gear changes to prevent flaring and reduce shock through the Auto and drivetrain.

Running the V8 Auto ECU won't really change much in that department.

Cheers
James