Ecotune Group Buy - 20% + Discount for BabyBMW Members

Welcome to ecotune, home of the economy and performance remap. At ecotune we specialise in performance and economy upgrades for cars and commercial vehicles.

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marco_polo
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Re: Ecotune Group Buy - 20% + Discount for BabyBMW Members

Post by marco_polo » Tue Mar 20, 2012 3:01 pm

Please don't confuse this with examples of N/A engines in a turbo discussion. :)

I still don't agree. A turbo works because there is a pressure difference across it. The bigger potential difference, the faster it spools.

But I'm going to test your theory. I'm going to solidly plug up my exhaust pipe with a potato, in the hope of making an unstallable, super-torquey car.
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Re: Ecotune Group Buy - 20% + Discount for BabyBMW Members

Post by Stotty » Tue Mar 20, 2012 3:11 pm

It wasn't me who first mentioned n/a cars in this discussion! Also, your turbo isn't boosting when your pulling away from a standstill, you need resistance generated through the clutch before it will spool. Madness I know!

Also it will spool quicker, I'm not debating this at all. Were talking about when pulling away from a standstill, the original post claimed his car was easier to stall due to the dpf removal. It is most likely the map has changed the cars charicteristics, I just disagreed with the idea that dpf removal actually increases engine torque on tickover.

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Re: Ecotune Group Buy - 20% + Discount for BabyBMW Members

Post by marco_polo » Tue Mar 20, 2012 3:19 pm

WTF are you on about today Stotty?! :lol: I need "resistance generated through the clutch before it will spool"?! That's the biggest load of rubbish I've ever read on the internet, ever.

The turbo spins with exhaust gasses, nothing to do with the transmission.
Last edited by marco_polo on Tue Mar 20, 2012 3:27 pm, edited 1 time in total.
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Re: Ecotune Group Buy - 20% + Discount for BabyBMW Members

Post by Stotty » Tue Mar 20, 2012 3:26 pm

marco_polo wrote:WTF are you on about today Stotty?! :lol: I need "resistance generated through the clutch before it will spool"?! That's the biggest load of rubbish I've ever read on the internet, ever.

The turbo spins with exhaust gasses, nothing to do with the transmission.
I'm very bad at putting what I mean across in words :oops:

Obviously if you rev it up it will spool :lol: I'll actually think about how it will be read before I post again.

Although it does have a lot to do with transmission. IIRC you can't generate positive boost without any engine load (i.e out of gear) when I said it won't spool, I meant boost (positively) I'm not sure in some scenario's you can get positive boost, but its not the same as when the engine is under load.
Last edited by Stotty on Tue Mar 20, 2012 3:39 pm, edited 1 time in total.

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Re: Ecotune Group Buy - 20% + Discount for BabyBMW Members

Post by marco_polo » Tue Mar 20, 2012 3:38 pm

Stotty wrote:It is most likely the map has changed the cars charicteristics, I just disagreed with the idea that dpf removal actually increases engine torque on tickover.
I agree it is most likely that the map has changed the cars torque curve.

I don't believe reducing back pressure on a turbo car will ever reduce the turbo's pressure or engine's torque output at any RPM. It can reduce turbo life though, specifically the sleeve bearing, unless the car is carefully mapped to suit.
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Re: Ecotune Group Buy - 20% + Discount for BabyBMW Members

Post by Vince1976 » Tue Mar 20, 2012 4:25 pm

Jesus Christ! Look at all these words :shock:

Bascially if you stall it... you're a nonce!

...and a sh1t driver :P


I stalled the other day, but that was only because I was masturbating at the traffice lights and I couldn't get my hand out of my pants in time as the lights changed to green :oops: The back pressure and the non-linear torque curvature caused my DMF to sprocket bounce and the rest is Kleenex history really...

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Re: Ecotune Group Buy - 20% + Discount for BabyBMW Members

Post by marco_polo » Tue Mar 20, 2012 4:28 pm

:rotfl:
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Re: Ecotune Group Buy - 20% + Discount for BabyBMW Members

Post by aottesen » Tue Mar 20, 2012 8:52 pm

Sooo.. Are there any conclusion?
If I exchange my cat with a downpipe, will I loose torque on lower revs, or will it just breath better (giving my blower a longer lifespan and easier spoolup)?

It's a '07 118d (90kw) remapped with Bluefin... (with the not-so-happy-exhaust-tail)

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Re: Ecotune Group Buy - 20% + Discount for BabyBMW Members

Post by DanH6 » Wed Mar 21, 2012 7:47 am

Vince1976 wrote:Jesus Christ! Look at all these words :shock:

Bascially if you stall it... you're a nonce!

...and a sh1t driver :P


I stalled the other day, but that was only because I was masturbating at the traffice lights and I couldn't get my hand out of my pants in time as the lights changed to green :oops: The back pressure and the non-linear torque curvature caused my DMF to sprocket bounce and the rest is Kleenex history really...
:lol: Haha it wasn't intentional it was just me familiarising myself with the new map! I have a solid feel for it now and I haven't stalled since I had the pipe fitted last Thursday.

I must add, 2 days before the pipe was fitted I put the ECU back in, and I took the car out only once to go to work which is just under 2 miles away. Before you mention it's probably better I have a petrol, my other job is 30 miles away 1 way :) but I digress! I took the car out (mapped) without the new pipe and I did stall it 3 times and got slightly paranoid, which leads me to believe 118ddk and that it is the map parameters that make it easier to stall. So I guess this clears up the cause of it.

But I've since rung Stan to give him some feedback, queried this and this is what I remembered which, as I can tell, I haven't worded very well :D so I hope Stan reads all this and can explain it more clearly than I have.

Now I wish I understood the logic behind it better :|

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Re: Ecotune Group Buy - 20% + Discount for BabyBMW Members

Post by ecotuneuk » Wed Mar 21, 2012 10:31 am

The software at idle is completely stock, not touched at all. We have had very few reports of the same (slightly easier to stall when lifting clutch at idle) but customers are generally not concerned by this at all.

We have been unable to confirm what exactly causes this as it seems to be isolated to very few cars, VNT models in particular. Wastegated models are completely unaffected. On the couple I have driven where this is reported I cannot feel any difference personally, perhaps some owners driving style makes this change more noticeable than others.

We have a theory that this slight change is related to lower exhaust gas temperature readings at idle or the absolute zero backpressure at idle causing the turbo geometry to change slightly to regulate idle air mass. In any case it is not causing any major concern and as long as our customers are happy... so are we :)
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Re: Ecotune Group Buy - 20% + Discount for BabyBMW Members

Post by Vince1976 » Wed Mar 21, 2012 11:05 am

So guys... back to my original question before the Hijack!

What's involved in the DPF replacement to take 2 hours of labour time?

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Re: Ecotune Group Buy - 20% + Discount for BabyBMW Members

Post by marco_polo » Wed Mar 21, 2012 11:26 am

Not a lot, its just the lack of space I think.
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Re: Ecotune Group Buy - 20% + Discount for BabyBMW Members

Post by ecotuneuk » Wed Mar 21, 2012 11:31 am

Vince1976 wrote:So guys... back to my original question before the Hijack!

What's involved in the DPF replacement to take 2 hours of labour time?
It's quite straight forward on the 1 series, no engine mounts or subframe needing removed. Just undertrays and support bolts. Band clamp on the turbo comes off and push the main exhaust back to slip off the downpipe.

Best wishes,

Stan
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Re: Ecotune Group Buy - 20% + Discount for BabyBMW Members

Post by Onehp » Wed Mar 21, 2012 5:52 pm

ecotuneuk wrote:
Vince1976 wrote:So guys... back to my original question before the Hijack!

What's involved in the DPF replacement to take 2 hours of labour time?
It's quite straight forward on the 1 series, no engine mounts or subframe needing removed. Just undertrays and support bolts. Band clamp on the turbo comes off and push the main exhaust back to slip off the downpipe.

Best wishes,

Stan
Getting the sensors loose from the connectors was the biggest pain for me as I could hardly see anything and cramped with one hand... but once you know, it's easy :)
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Re: Ecotune Group Buy - 20% + Discount for BabyBMW Members

Post by ecotuneuk » Wed Mar 21, 2012 8:57 pm

Onehp wrote:Getting the sensors loose from the connectors was the biggest pain for me as I could hardly see anything and cramped with one hand... but once you know, it's easy :)
We unplug the sensors from their electrical sockets leaving them screwed into the pipe. Then after a spray with the old shock & unlock they come out quite easily on the bench.
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