New 3L petrol engine
02-20-2006, 12:00 PM
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Originally Posted by 525dse' post='243291' date='Feb 20 2006, 03:56 PM
"Peak torque of 400 Nm is delivered between 1,500 rpm and 5,800 rpm and the engine boasts a 7,000 rpm red line. " 
that engine will make the 3 series coupe a rocket! well feel it. it may have alot less torque than a 535d, but it covers alot more of the rev range...
that engine will make the 3 series coupe a rocket! well feel it. it may have alot less torque than a 535d, but it covers alot more of the rev range...
02-20-2006, 12:04 PM
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yeah... however I agree they could have got more power in stock tune... maybe 320 bhp? or 325 would be good... I would be interested to see what DMS could do with this engine 
I would still choose a 535d over the 535i however, better residuals and MPG.
I would still choose a 535d over the 535i however, better residuals and MPG.
02-20-2006, 12:13 PM
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Originally Posted by 525dse' post='243296' date='Feb 20 2006, 04:04 PM
yeah... however I agree they could have got more power in stock tune... maybe 320 bhp? or 325 would be good... I would be interested to see what DMS could do with this engine I would still choose a 535d over the 535i however, better residuals and MPG.
I would still choose a 535d over the 535i however, better residuals and MPG.Also i want to add a few things. Since i've been on this forum for a while and from my own experience, i know a thing or 2 about engine setups. So the petrol has 2 small turbos that deliver, and since it is after all a petrol engine that delivers well to the redline and quite a bit more on the red line (as NA engines do), then it means that the power curve on the TT petrol will be a little different then on the NA engine. It will sit higher but i think it will not keep up in the same percentage as the NA engine. Meaning it will probably hit peak power earlier and it will sustain a more sudden drop after the peak power is achived, a more sudden drop then the petrol. I'm so dieing to see alot of dyno charts to compare the 2 of them (NA vs TT). It's not like the diesel when if you rev (if you could) over the red line you will acomplish nothing. In a NA engine if you do that you'll still have some power left (considerable vs a diesel). That's why i question the size of the turbo chargers and also their set-up. Hey not to mention that also because of the same reason the level of tune (in % gains) the diesel is going to have the bigger gain (%) both in torque and in hp. But hey we are talkign about different engines and i realise that, totaly different set up and construction.
02-20-2006, 12:16 PM
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Originally Posted by colejl' post='243281' date='Feb 20 2006, 12:42 PM
That's true but off-boost even petrol turbo's seem slow and sluggish!
It looks like BMW have bolted on 2 'small' turbo's - that's why there's 'no lag' and not a fantastically high specific output...
The sequential approach would of been better but modern economics is forcing the issue of consumption and emissions. Bottom line is it's 'better' than the 4 litre V8
(I expect the 540i to disappear in the UK and be replaced by the 535i)
It looks like BMW have bolted on 2 'small' turbo's - that's why there's 'no lag' and not a fantastically high specific output...
The sequential approach would of been better but modern economics is forcing the issue of consumption and emissions. Bottom line is it's 'better' than the 4 litre V8
(I expect the 540i to disappear in the UK and be replaced by the 535i)Sequential turbos is one way to address the issue, and the other is variable turbine geometry (movable vanes vary the angle at which air blows on the turbines, depending on engine speed and throttle position). The 997 Turbo is the first gasoline engine to use this technology (which has been used in diesel engines in the past)--more info here:
http://www21.porsche.com/all/masterwerk/usa.aspx
02-20-2006, 12:19 PM
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Originally Posted by stream' post='243305' date='Feb 20 2006, 04:16 PM
Twin turbos (2 smaller vs. one larger) do help address the turbo lag issue, but won't eliminate it. The Porsche 996 Turbo has twin turbos, and there's a noticeable lag.
Sequential turbos is one way to address the issue, and the other is variable turbine geometry (movable vanes vary the angle at which air blows on the turbines, depending on engine speed and throttle position). The 997 Turbo is the first gasoline engine to use this technology (which has been used in diesel engines in the past)--more info here:
http://www21.porsche.com/all/masterwerk/usa.aspx
Sequential turbos is one way to address the issue, and the other is variable turbine geometry (movable vanes vary the angle at which air blows on the turbines, depending on engine speed and throttle position). The 997 Turbo is the first gasoline engine to use this technology (which has been used in diesel engines in the past)--more info here:
http://www21.porsche.com/all/masterwerk/usa.aspx
02-20-2006, 12:28 PM
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Yeah, they will drive differently thats for sure... Also (if) the 535i is used in the US market to fit the gap between the 530i and 550i, some people who enjoy the characteristics of a NA engine may be dissapointed with the way a 535i delivers its power eg. the satisfactory feeling you get from an M5 when you rev to get its power. Thats however if their is a significant drop in horspower and torque after certain RPM's. Could this put people off from buying a 535i??? I guess until we know dyno figures... and what its like to drive, the driving feel you get... we won't know. keeping my eyes peeled.
02-20-2006, 01:00 PM
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Originally Posted by 700700' post='243334' date='Feb 20 2006, 04:46 PM
welcome to three days ago ! i posted it on the 16th
Aaah no biggie...
02-20-2006, 01:29 PM
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Originally Posted by 700700' post='243334' date='Feb 20 2006, 09:46 PM
welcome to three days ago ! i posted it on the 16th
We knew it was coming - although some people said it wouldn't... (i.e BMW wouldn't touch turbo's for petrol)
02-20-2006, 01:33 PM
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Originally Posted by big_ipaq' post='243286' date='Feb 20 2006, 08:49 PM
I doubt it. 540i is one of the youngest in the range... Isn't it?
It will hit the 335i first (especially for the coupe). BMW may even decide to keep the 540i as the V8 has more 'kudos'...
635i anyone? (Now will the 630i remain???
)Of course we're all assuming the x35i tag? Perhaps it will be x30Ti or similar?
