The BMW UUC Digest Volume 3 : Issue 84 : "text" Format Messages in this Issue: Re: E36 M3 Performance Upgrades Re: E36 M3 Performance Upgrades Re: E36 M3 Performance Upgrades E36 M3 Performance Upgrades Re: E36 M3 Performance Upgrades Re: E36 M3 Performance Upgrades Re: Kw readings.... Power hp / ps / Kw (was Kw readings.... )
---------------------------------------------------------------------- Date: Thu, 2 Mar 2006 09:01:36 -0500 From: "Gary Derian" <[EMAIL PROTECTED]> To: "Marco Romani" <[EMAIL PROTECTED]>, <[email protected]> Subject: Re: E36 M3 Performance Upgrades Message-ID: <[EMAIL PROTECTED]> I don't see what event in one branch can help scavenging in the other branch. A crossover does provide a place for pressure waves to reflect back to the engine, and that function will improve tuning. Its not the crossing over, its the step in the pipe. A megaphone on each collector would be even better, leading to an exhaust plenum, then mufflers from there. Anything after the exhaust plenum is out of the tuning equation. Gary Derian > btw - what's your opinion/thoughts on a cross over for a I6? I think it's > snake oil, but I can be convinced otherwise. > > Marco > ------------------------------ Date: Thu, 2 Mar 2006 07:44:21 -0800 From: "Marco Romani" <[EMAIL PROTECTED]> To: <[email protected]> Subject: Re: E36 M3 Performance Upgrades Message-ID: <[EMAIL PROTECTED]> that's pretty much what I thought. Good point about the megaphone, I hadn't factored that in. Marco -----Original Message----- From: Gary Derian [mailto:[EMAIL PROTECTED] Sent: Thursday, March 02, 2006 6:02 AM To: Marco Romani; [email protected] Subject: Re: [UUC] E36 M3 Performance Upgrades I don't see what event in one branch can help scavenging in the other branch. A crossover does provide a place for pressure waves to reflect back to the engine, and that function will improve tuning. Its not the crossing over, its the step in the pipe. A megaphone on each collector would be even better, leading to an exhaust plenum, then mufflers from there. Anything after the exhaust plenum is out of the tuning equation. Gary Derian > btw - what's your opinion/thoughts on a cross over for a I6? I think it's > snake oil, but I can be convinced otherwise. > > Marco > ------------------------------ Date: Thu, 2 Mar 2006 10:51:51 -0500 From: "Gary Derian" <[EMAIL PROTECTED]> To: "Marco Romani" <[EMAIL PROTECTED]>, <[email protected]> Subject: Re: E36 M3 Performance Upgrades Message-ID: <[EMAIL PROTECTED]> Megaphones are pretty cool, high frequencies (short wavelength) reflect closer to the small end, and low frequencies (long wavelength) reflect closer to the large end, so the result is the effective pipe length changes with rpm. Gary Derian > that's pretty much what I thought. Good point about the megaphone, I > hadn't > factored that in. > > Marco ------------------------------ Date: Thu, 2 Mar 2006 08:03:06 -0800 (PST) From: kjk <[EMAIL PROTECTED]> To: [email protected] Subject: E36 M3 Performance Upgrades Message-ID: <[EMAIL PROTECTED]> Marco wrote: "My destroked S50 to 2.9L is getting ~260 at the wheels but that is with some serious work - custom pistons, cams, solid lifters, porting&polishing, ceramic coated combustion chambers, tec3. My engine builder thinks we can free up some more hp by redesigning the intake plenum and runners along with a much larger TB. It's in the works. I'm about 25hp from my 110hp/liter goal. This engine is not suitable for street driving. Lots of valve overlap, lots of lift and duration, idles at 1500rpm but runs like a scalded cat. probably some more tuning and playing with cam timing would solve the cold start and low speed issues, but it's a race motor and rarely sees under 4k rpm on the track." Marco, you forgot the part about price.;-) Kevin Kelly '91 M5 __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com ------------------------------ Date: Thu, 2 Mar 2006 10:22:51 -0800 From: [EMAIL PROTECTED] To: [email protected] Subject: Re: E36 M3 Performance Upgrades Message-ID: <[EMAIL PROTECTED]> Does anyone else get the sense that Gary is working with Brett on double secret project G where they put an LS1 into an Isetta? -Kevin ---------------------------------------------------------------- This e-mail communication is confidential and is intended only for the individual(s) or entity named above and others who have been specifically authorized to receive it. If you are not the intended recipient, please do not read, copy, use or disclose the contents of this communication to others. Please notify the sender that you have received this e-mail in error by replying to the e-mail. Please then delete the e-mail and any copies of it. Thank you. ---------------------------------------------------------------- ------------------------------ Date: Thu, 2 Mar 2006 08:34:48 -0800 From: "Marco Romani" <[EMAIL PROTECTED]> To: <[email protected]> Subject: Re: E36 M3 Performance Upgrades Message-ID: <[EMAIL PROTECTED]> for a most people the price would have caused a coronary. I did a bunch of the work myself so I just had some serious heartburn..... Marco -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of kjk Sent: Thursday, March 02, 2006 8:03 AM To: [email protected] Subject: [UUC] E36 M3 Performance Upgrades Marco wrote: "My destroked S50 to 2.9L is getting ~260 at the wheels but that is with some serious work - custom pistons, cams, solid lifters, porting&polishing, ceramic coated combustion chambers, tec3. My engine builder thinks we can free up some more hp by redesigning the intake plenum and runners along with a much larger TB. It's in the works. I'm about 25hp from my 110hp/liter goal. This engine is not suitable for street driving. Lots of valve overlap, lots of lift and duration, idles at 1500rpm but runs like a scalded cat. probably some more tuning and playing with cam timing would solve the cold start and low speed issues, but it's a race motor and rarely sees under 4k rpm on the track." Marco, you forgot the part about price.;-) Kevin Kelly '91 M5 __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com Search the ARCHIVES:http://www.mail-archive.com/[email protected] __________________________________________________________________________ In memory of Michel Potheau - friend, enthusiast, founder of the BMW CCA. UUC Motorwerks - BMW Performance Fine-tuning and home of the Ultimate Short Shifter - accept no substitutes! 908-874-9092 . http://www.uucmotorwerks.com ------------------------------ Date: Fri, 3 Mar 2006 04:15:10 EST From: [EMAIL PROTECTED] To: [EMAIL PROTECTED], [EMAIL PROTECTED], [email protected] Subject: Re: Kw readings.... Message-ID: <[EMAIL PROTECTED]> In a message dated 02.03.2006 15:41:58 Westeuropäische Normalzeit, [EMAIL PROTECTED] writes: Horsepower is irrelevant, acceleration is what counts. 300 hp is a nice round number. 223.7 kW isn't. Gary Derian ................... I agree, most dynos read in Kw. and then translate the power into Hp(SAE) or PS(DIN). But Garry I think your off alittle in your calculations. 300 Hp is more like 220.58 Kw. One Kw is equeal to 1.36Hp. ;)) Bye David Bamberg, Germany. ------------------------------ Date: Fri, 3 Mar 2006 04:52:27 -0600 From: "Roan Low" <[EMAIL PROTECTED]> To: <[email protected]>, <[EMAIL PROTECTED]> Cc: <[EMAIL PROTECTED]> Subject: Power hp / ps / Kw (was Kw readings.... ) Message-ID: <[EMAIL PROTECTED]> Gary was converting from SAE hp to Kw... Power hp: horsepower ps: stands for Pferdestärke, equivalent to hp. kW: kilowatt. 1kW = 1.34hp. EU countries such as Germany prefer to use kW. There are different methods for measuring power, test conditions such as ambient temperature, air pressure and accessory loss could be different, thus the same engine could obtain different power rating by different methods. The most commonly used methods are: EEC: European standard. Measure at 99kPa and 25°C. Rated in kW. SAE: American standard. Measure at 99kPa and 25°C. Rated in hp. 1kW = 1.341hp (SAE). DIN: German standard. Measure at 101.3kPa and 20°C. Rated in hp (ps). 1kW = 1.360hp (DIN). JIS: Japanese standard. Theoretically same as DIN, but we always find it is actually smaller. British horsepower: same as SAE. Rated in bhp (could be confused with brake horse power). In other words, 300hp (SAE) = 300bhp (British) > 300hp (DIN) > 300ps (JIS) -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of [EMAIL PROTECTED] Sent: Friday, March 03, 2006 03:15 To: [EMAIL PROTECTED]; [EMAIL PROTECTED]; [email protected] Subject: Re: [UUC] Kw readings.... In a message dated 02.03.2006 15:41:58 Westeuropäische Normalzeit, [EMAIL PROTECTED] writes: Horsepower is irrelevant, acceleration is what counts. 300 hp is a nice round number. 223.7 kW isn't. Gary Derian ................... I agree, most dynos read in Kw. and then translate the power into Hp(SAE) or PS(DIN). But Garry I think your off alittle in your calculations. 300 Hp is more like 220.58 Kw. One Kw is equeal to 1.36Hp. ;)) Bye David Bamberg, Germany. ------------------------------ End of [bmwuucdigest] digest(8 messages) **********
