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E90 M3 (Sedan) | E92 M3 (Coupe) | E93 M3 (Convertible) (2008-2013) {Engine: S65 - Max Hp: 414 hp (420 hp Euro) at 8,300 rpm / 295 lb/ft at 3,900 rpm}


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Old Tue, May-06-2008, 03:35:56 AM   #41
IcemanG17
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I don't see the M3-5-6 using DFI anytime soon....sure its "slightly" better....but there is a reason they DIDN'T use it....cost might be that reason, but with over 100HP-Liter why bother.....Porsche still doesn't beat the HP-L of the M3 even with DFI??? (GT3 not included, only the base (997-997S)
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Old Tue, May-06-2008, 03:49:15 AM   #42
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Quote:
Originally Posted by IcemanG17 View Post
I don't see the M3-5-6 using DFI anytime soon....sure its "slightly" better....but there is a reason they DIDN'T use it....cost might be that reason, but with over 100HP-Liter why bother.....Porsche still doesn't beat the HP-L of the M3 even with DFI??? (GT3 not included, only the base (997-997S)
I'd say an additional 30hp and additional 20 lb ft of torque is more than "slighty better" for the 997S.

The '09 997S 3.8 w/ DFI is 385 hp and over 100 hp per liter (101.3) but still shy of the 103.5 for the M3.

If and when the M3 ever goes DFI it should be good for about +/-40 more hp and +/-30 lb ft more of torque based on the % increase Porsche and others have acheived plus an improvement in fuel economy of about 15% which is something M3 could surely benefit from.

Nice 928...I had an new S4 in 87 and loved it.

Last edited by 500; Tue, May-06-2008 at 04:01:40 AM.
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Old Tue, May-06-2008, 03:41:40 PM   #43
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maybe
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Old Tue, May-06-2008, 08:42:47 PM   #44
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Originally Posted by 500 View Post
I'd say an additional 30hp and additional 20 lb ft of torque is more than "slighty better" for the 997S.

The '09 997S 3.8 w/ DFI is 385 hp and over 100 hp per liter (101.3) but still shy of the 103.5 for the M3.

If and when the M3 ever goes DFI it should be good for about +/-40 more hp and +/-30 lb ft more of torque based on the % increase Porsche and others have acheived plus an improvement in fuel economy of about 15% which is something M3 could surely benefit from.

Nice 928...I had an new S4 in 87 and loved it.

again, that HP is due to
cams
intake
exhaust, headers & exhaust
rev increase
ecu

itis not theoretically possible for there to be a 8.5% volumetric efficiency increase on the injection alone...getting fuel in is easy...it's getting the air in, and the exhaust out that is the challenge...

it's 15 lb ft of torque, not 20...it's 20 N m

in fact, under non-cruise conditions, it may lose power:
1 takes power to raise the fuel pressure to 1700 psi
2 pressurizing the fuel raises it's temp, warm fuel has less energy... PV = nRT

Last edited by ArtM3; Tue, May-06-2008 at 08:49:58 PM.
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Old Wed, May-07-2008, 12:24:33 AM   #45
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Turbos, SuperCharger, Hybrid, BioFuel... Something!

14/20 wont cut it for 7 years..for sure not.

http://www.boston.com/news/local/mas...heir_guzzlers/



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Old Wed, May-07-2008, 01:07:43 AM   #46
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Originally Posted by juzef View Post
Turbos, SuperCharger, Hybrid, BioFuel... Something!

14/20 wont cut it for 7 years..for sure not.

http://www.boston.com/news/local/mas...heir_guzzlers/



Joseph
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worst gas guzzlers...
multiple MB's and an Audi...
but not a single BMW...hmmmmmm
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Old Wed, May-07-2008, 03:06:59 AM   #47
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Quote:
Originally Posted by ArtM3 View Post
again, that HP is due to
cams
intake
exhaust, headers & exhaust
rev increase
ecu
Again, the X51 powerkit which contains all you've mentioned (intake, exhaust, headers & rev increase, ecu and even revised heads) increased the power by about 27hp in the past; but as of yet there is no X51 scheduled for MY 09; most of the power gain for the '09 MY is due to DFI!!! Again, Porsche may offer X51 later on in the MY and if they do it will offer even more power beyond the 30hp from DFI. You remain simply clueless about how DFI increases power even though I've provided the information for you and from multiple sources...Porsche just sent out a special factory booklet that was enclosed with the latest Christophours magazine which describes Porsche's commitment to the enviornment and there is a section on DFI and how it not only increase fuel economy by 15% but how it improves power all on its own.

Let's just agree to disagree on this one.

I'm movin' on...

Last edited by 500; Wed, May-07-2008 at 06:30:35 PM.
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Old Wed, Oct-15-2008, 10:48:22 AM   #48
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bringing this thread back..........

couple of notes as i understand dfi. you get more power through enabling higher compression.

now the reg 3 series are coming with dfi.....i can't see bmw m, amg not embracing the technology. (audi already has) it's a win win..power and econony (plus increased throttle response).

agree with 500's estimate......dfi will prob equate to 40 hp in v8 m3.

increasingly this is being seen as the next big thing for engines...regardless of effectiveness (it is) manufacurers may be forced to adopt for the sales/environmental aspects....so what do you fellas think....maybe bmw will implement?
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Old Wed, Oct-15-2008, 10:55:01 AM   #49
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Quote:
Originally Posted by ArtM3 View Post
itis not theoretically possible for there to be a 8.5% volumetric efficiency increase on the injection alone...getting fuel in is easy...it's getting the air in, and the exhaust out that is the challenge...

art- dfi permits increased compression which creates more power.....ie more efficiency.
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Old Wed, Oct-15-2008, 01:54:51 PM   #50
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Quote:
Originally Posted by 440HPE46 View Post
Buy a Prius...

But on the track...
tell that the z06 which will spank just about anything at the track, and the dragstrip with ease, all while still being able to maintain ~15\24mpg
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Discussing Will the M3's get DFI for '09? in the E90 M3 (Sedan) | E92 M3 (Coupe) | E93 M3 (Convertible) (2008-2013) Forum - {Engine: S65 - Max Hp: 414 hp (420 hp Euro) at 8,300 rpm / 295 lb/ft at 3,900 rpm} at BMW M3 Forum.com (E30 M3 | E36 M3 | E46 M3 | E92 M3 | F80/X)