Delay in power when accelerating from low speed

In my limited experience the issue does not arise when you floor it, there is no delay and you take off - it is when partial throttle is used where max acceleration is not required.

Garry

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Originally Posted by Disco4SE

Hi Greg,
Interested to know if you had the re-map done professionaly or did you somehow do it yourself?
Cheers, Craig

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Craig I had it remapped by David Dye at 3MW in Perth, using a Superchips machine. He tells me that what they do is suck the software out, email it to a specialist shop in England where it's tweaked, then emailed back and pumped back into the car.
All done in a couple of hours, late in the afternoon to take into account the 8 hour time difference between London and Perth.
Go figure. I don't understand the technology, but I appreciate the difference it makes to the grunt. It's quite remarkable.

Still doesn't resolve the niggling annoyance of the lag at low speed acceleration though....it's only while negotiating a certain corner....
Greg

Thanks Greg.
Do you find that you are using more fuel?
Did they supply you with new output figures?
Not something I am looking at doing straight away, but I always tend to play with my vehicles down the track.
Cheers, Craig

Craig I don't have the output figures with me but from memory, 207kw and about 670nm of torque.

If you go to the super chips website www.superchips.com.au I think they supply them there.

I had it done pretty much as soon as I bought the car so I didn't take much notice of fuel consumption. I get about 12 liters per hundred around town and about 8.5 on the highway but I never get bent out of shape about fuel use anyway, except in regard to range. In the overall scheme of things (think depreciation of $10,000 or more a year) it's pretty small potatoes.

Cheers, Greg

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Originally Posted by GregMilner

think depreciation of $10,000 or more a year

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My insurer dropped my 3.0 D4's value $12.5K.

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Originally Posted by GregMilner

If you go to the super chips website www.superchips.com.au I think they supply them there.

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The superchips product seems to produce a bit less power and torque than other products - certainly on the 2.7 TDV6 (about 27kw vs 40kw)

Garry

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Originally Posted by Graeme

My insurer dropped my 3.0 D4's value $12.5K.

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Graeme,
I think that they have made an error. My 2005 D3 TDV6 is insured for $36k.

I'd check it out or change insurers,
Peter

I was surprised they dropped it that much and then when I said it now has an $1800 bull-bar they asked if the amount was enough to cover that as well. Furthermore they didn't want to record that the bbar was fitted, only suggesting that I take a picture of it and keep receipts. A note was eventually added to the policy but no increase in insured value. I might drop into the local office and have a chat. With 36K it probably isn't worth much more but if I had to get a replacement used one it probably wouldn't have that many kms anyway.

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Originally Posted by ozscott

There really can be no excuse for this. Full Stop. In modern tech to say its one of the computer systems, unless it can readily be fixed, is a cop out for LR. If the gearbox is thinking it aint thinking too well...If I were a smart box and was aware that someone had been driving sedately for 100 miles but then saw the throttle being floored would I think oh, he is a conservative driver, so he really didnt mean to mash the pedal...wait....wait...ohh he did mean it cause it still held down...(given me bloody strength cause by now he could have been cleaned up by that other vehicle bearing down on him...)...NO,,, I would think in a millisecond that FULL THROTTLE means just that. It does not matter whether the engine and gearbox are doing in terms of economy and reducing advance etc when the throttle is pressed to the floor it is very easy to have the engine and box respond with the full kahuna - ie max power and torque available including the quickest and best downshift and, for that matter, air conditioning compressor off. For God's sake this isnt rocket science, its basic programming and the consumer cannot be expected to swallow a 2 second delay in acceleration when its most required.

Now, if it is as I suspect, the downside to a turbo diesel, then thats a different thing, and you have to live with it...if you want full house acceleration when you mash the pedal under all circumstances buy a V8 petrol and pay the fuel bills cause I have driven a few modern TD's and they all suffer bad lag at some stage of the driving experience. Go and visit some of the pajero boards for example and see the complaints of lag...

Cheers

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I can understand that in a single turbo 4 cylinder 4WD but not in a sequential twin turbo V6. On any given day, you can sit stationary and just nail it....the car goes like a rocket......but every now and then....it has this stupid delay.

And I think one of the other writers hit the nail on the head.....it's not when you fully hammer it, it tends to be when you want to take off quite quickly....not like the devil is chasing you.

I'd be interested to see if any V8 owners have the same problem....not that that would definately prove anything as their transmission may be 'managed' differently to the oiler.

I dunno....:confused:

My petrol V8's the same, well certainly similar.

It's to do with the gearbox more than the engine and to overcome it, I'll drive it in sport and select the gears myself, that way it's always ready to go. The actual feeling is like a large 'dead spot' in the middle of the pedal travel if you're just trundling along on a light throttle, then go to accelerate. Either that or say, coming up to a junction and the box isn't in the right gear if you suddenly apply the throttle, meaning there's a lag whilst it gets the right gear then gives it the beans.

Annoying, but I've got used to it and know when to use the box myself now.