Replacing the exhaust heatshield with Nimbus - Revision history

Stu at 20:38, 2 May 2010

2010-05-02T20:38:07Z

← Older revision		Revision as of 20:38, 2 May 2010
Line 56:		Line 56:
	**Do not cut the holes for the exhaust mounts! (I did that, but it's useless and would only introduce new 'leaks', so I covered it again)		**Do not cut the holes for the exhaust mounts! (I did that, but it's useless and would only introduce new 'leaks', so I covered it again)
	* form the Nimbus so it'll fit in the car. Don't forget to shape some extra's (a cross or so) to prevent it from rattling)		* form the Nimbus so it'll fit in the car. Don't forget to shape some extra's (a cross or so) to prevent it from rattling)
	* use long and wide pop rivets to fit the new ~~heatsield~~.		* use long and wide pop rivets to fit the new heatshield.
	**Drill hole, stick pop rivet in from above and push a large outside diameter washer over the other side of the pop rivet to spread the load. ~~Prefferably~~ use more pop rivets then original to get the whole thing stable.		**Drill hole, stick pop rivet in from above and push a large outside diameter washer over the other side of the pop rivet to spread the load. Preferably use more pop rivets then original to get the whole thing stable.
	* Create a tunnel made from Cirrcus which fits over the manifold and cat. I've bend the side approx. 5cm down to catch the heat. (also here, you will have to fold the sides, so you need to cut a bigger sheet then the actual size needed!). Exactly same story here with the pop rivets.		* Create a tunnel made from Cirrcus which fits over the manifold and cat. I've bend the side approx. 5cm down to catch the heat. (also here, you will have to fold the sides, so you need to cut a bigger sheet then the actual size needed!). Exactly same story here with the pop rivets.

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	==Only for racers? NO!==		==Only for racers? NO!==
	In the past years, I found that not only trackdays but mainly long motorway stretches were really warming up the rear end of the car. Wires were melted, the cable loom of my satnav which I dropped in the boot, was melted ~~aswell~~.		In the past years, I found that not only trackdays but mainly long motorway stretches were really warming up the rear end of the car. Wires were melted, the cable loom of my satnav which I dropped in the boot, was melted as well.

	I've done Abbeville recently which means a 3,5 hr stretch of 100mph on the motorway.. temperature went down from well over 100 degrees in the boot to around 29 degrees in the hottest area (boot was completely packed up which stopped any airflow)		I've done Abbeville recently which means a 3,5 hr stretch of 100mph on the motorway.. temperature went down from well over 100 degrees in the boot to around 29 degrees in the hottest area (boot was completely packed up which stopped any airflow)

paulc: formatting

2009-09-01T00:04:24Z

formatting

← Older revision		Revision as of 00:04, 1 September 2009
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	== ~~'''<i>~~Nimbus Gll Material Properties~~</i>'''~~ ==~~<br>~~		==Nimbus Gll Material Properties==

	'''Construction:''' <br>		'''Construction:''' <br>
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	'''Thermal:'''<br>		'''Thermal:'''<br>
	Thermal Conductivity @ 150 ºC 0.27 W/mK~~<br>~~<br>		Thermal Conductivity @ 150 ºC 0.27 W/mK<br>
	Hot Plate Temperature Drop @ 150 ºC: 72.3 ºC~~<br><br>~~		Hot Plate Temperature Drop @ 150 ºC: 72.3 ºC

	== ~~'''<i>~~Cirrus GIIIx Material Properties~~</i>'''~~ ==~~<br>~~		==Cirrus GIIIx Material Properties==

	'''Construction:''' <br>		'''Construction:''' <br>
Line 31:		Line 31:

	'''Thermal:'''<br>		'''Thermal:'''<br>
	Thermal Conductivity @ 150 ºC 0.11 W/mK~~<br>~~<br>		Thermal Conductivity @ 150 ºC 0.11 W/mK<br>
	Hot Plate Temperature Drop @ 150 ºC: 54 ºC~~<br><br>~~		Hot Plate Temperature Drop @ 150 ºC: 54 ºC


	== ~~'''<i>~~Description~~</i>'''~~ ==~~<br>~~		==Description==

	I removed the old heatshield from my car (the cardboard stuff with silver lining) and replaced that with Nimbus. The real hot area's (which are manifold and cat) have been protected with Cirrus.		I removed the old heatshield from my car (the cardboard stuff with silver lining) and replaced that with Nimbus. The real hot area's (which are manifold and cat) have been protected with Cirrus.
	~~<br><br>~~

	Nimbus and Cirrus are for different applications.~~<br>~~		Nimbus and Cirrus are for different applications.
	Nimbus is a two layer heatshield (as described above) which is perfect for general use. It's good to shield an exhaust or -as I did- as a replacement of the old cardboard heatshield.~~<br><br>~~		* Nimbus is a two layer heatshield (as described above) which is perfect for general use. It's good to shield an exhaust or -as I did- as a replacement of the old cardboard heatshield.
			* Cirrus has an extra layer in between which makes it ideally suited for the really hot (radiating) area's. The extra layer doesn't only provide an extra barrier, it also stops the material from degrading over several heat cycles.

	~~Cirrus has an extra layer in between which makes it ideally suited for the really hot~~ (~~radiating~~) area's. ~~The extra~~ layer ~~doesn't only provide an extra barrier, it also stops~~ the ~~material from degrading over several heat cycles~~.~~<br><br>~~		What I've done is simply replace all cardboard (OE) stuff with Nimbus and extended that into the engine bay to cover the area's which were not covered by the old heatshield. After that, I created a second layer from Cirrus(and formed that) around the manifold and the cat.

	~~What~~ I've ~~done is simply replace all cardboard (OE) stuff with~~ Nimbus and ~~extended that into the engine bay to cover the area~~'~~s which were not covered by the old heatshield. After that, I created a second layer from Cirrus(and formed that) around the manifold and the cat~~.~~<br><br>~~		I've used one sheet of Nimbus and one sheet of Cirrus for this 'project'.

	I've ~~used one sheet of Nimbus and one sheet of Cirrus for this 'project'.<br><br>~~		==Replacement of the OE shield and some extra...==
			What I've done is very simple:

			* remove all exhaust components
			* remove the old heatshield (in one piece!!)
			* take the old heatshield and 'crush it' on the sheet of Nimbus. Draw a cutting line around the original cardboard. '''(take at least 2cm around the old stuff as you have to fold Nimbus round to stop it from falling apart)'''
			**Do not cut it at the point where the manifold goes into the engine bay, you can simply fold that around the subframe and shield the area which isn't shielded at this moment.
			**Do not cut the holes for the exhaust mounts! (I did that, but it's useless and would only introduce new 'leaks', so I covered it again)
			* form the Nimbus so it'll fit in the car. Don't forget to shape some extra's (a cross or so) to prevent it from rattling)
			* use long and wide pop rivets to fit the new heatsield.
			**Drill hole, stick pop rivet in from above and push a large outside diameter washer over the other side of the pop rivet to spread the load. Prefferably use more pop rivets then original to get the whole thing stable.
			* Create a tunnel made from Cirrcus which fits over the manifold and cat. I've bend the side approx. 5cm down to catch the heat. (also here, you will have to fold the sides, so you need to cut a bigger sheet then the actual size needed!). Exactly same story here with the pop rivets.

	~~== '''<i>Replacement~~ of the ~~OE shield and some extra~~.~~..</i>''' ==<br>~~		I had a bit of a problem as the pop rivets initially were not long enough. This can simply be solved by tapping the area around the pop rivet (diameter of the washer)
	~~<br>~~
	~~What I've done is very simple:<br><br>~~

	~~- remove all exhaust components<br><br>~~		For the manifold end on the engine, I formed a sheet around the manifold and attached that to the boot bulkhead with square pipes of ali.

	~~- remove the old heatshield (in one piece!!)<br><br>~~		==Pricing this project...==

	~~- take the old heatshield and 'crush it' on the~~ sheet of Nimbus~~. Draw a cutting line around the original cardboard. '''~~(~~take at least 2cm around the old stuff as you have to fold Nimbus round to stop it from falling apart~~)~~'''<br><br>~~		The cost for one sheet of Nimbus is 85 euro + VAT (1226*1250mm)

	~~Do not cut it~~ at ~~the point where the manifold goes into the engine bay, you can simply fold that around the subframe and shield the area which isn't shielded at this moment.<br><br>~~		Cirrus is available at 90 euro + VAT (580*1250mm)

	~~Do not cut the holes for the exhaust mounts! (I did that, but it's useless and would only introduce new 'leaks', so I covered it again)<br><br>~~		Besides that, you will need (preferably full aluminium) pop rivets and large outside diameter washers.

	~~- form the Nimbus so it'll fit in the car. Don't forget to shape some extra's (a cross or so) to prevent it from rattling)<br><br>~~

	~~- use long and wide pop rivets to fit the new heatsield. <br>~~
	Drill hole, stick pop rivet in from above and push a large outside diameter washer over the other side of the pop rivet to spread the load. Prefferably use more pop rivets then original to get the whole thing stable.<br><br>

	- Create a tunnel made from Cirrcus which fits over the manifold and cat. I've bend the side approx. 5cm down to catch the heat. (also here, you will have to fold the sides, so you need to cut a bigger sheet then the actual size needed!). Exactly same story here with the pop rivets.<br><br>

	~~I had a bit of a problem as the pop rivets initially were not long enough. This can simply be solved by tapping the area around the pop rivet (diameter of the washer)<br><br>~~

	~~For the manifold end on the engine, I formed a sheet around the manifold and attached that to the boot bulkhead with square pipes of ali.<br><br>~~

	~~== '''<i>Pricing this project...</i>''' ==<br>~~

	~~The cost for one sheet of Nimbus is 85 euro + VAT (1226*1250mm) <br>~~
	~~Cirrus is available at 90 euro + VAT (580*1250mm)~~
	Besides that, you will need (~~prefferably~~ full aluminium) pop rivets and large outside diameter washers.~~<br><br>~~


	== ~~'''<i>~~Only for racers? NO!~~</i>'''~~ ==~~<br><br>~~		==Only for racers? NO!==
			In the past years, I found that not only trackdays but mainly long motorway stretches were really warming up the rear end of the car. Wires were melted, the cable loom of my satnav which I dropped in the boot, was melted aswell.

	In the past years, I found that not only trackdays but mainly long motorway stretches were really warming up the rear end of the car. Wires were melted, the cable loom of my satnav which I dropped in the boot, was melted aswell. <br>
	I've done Abbeville recently which means a 3,5 hr stretch of 100mph on the motorway.. temperature went down from well over 100 degrees in the boot to around 29 degrees in the hottest area (boot was completely packed up which stopped any airflow)		I've done Abbeville recently which means a 3,5 hr stretch of 100mph on the motorway.. temperature went down from well over 100 degrees in the boot to around 29 degrees in the hottest area (boot was completely packed up which stopped any airflow)

Mr Wiki at 13:46, 17 April 2007

2007-04-17T13:46:29Z

← Older revision		Revision as of 13:46, 17 April 2007
Line 86:		Line 86:
	In the past years, I found that not only trackdays but mainly long motorway stretches were really warming up the rear end of the car. Wires were melted, the cable loom of my satnav which I dropped in the boot, was melted aswell. <br>		In the past years, I found that not only trackdays but mainly long motorway stretches were really warming up the rear end of the car. Wires were melted, the cable loom of my satnav which I dropped in the boot, was melted aswell. <br>
	I've done Abbeville recently which means a 3,5 hr stretch of 100mph on the motorway.. temperature went down from well over 100 degrees in the boot to around 29 degrees in the hottest area (boot was completely packed up which stopped any airflow)		I've done Abbeville recently which means a 3,5 hr stretch of 100mph on the motorway.. temperature went down from well over 100 degrees in the boot to around 29 degrees in the hottest area (boot was completely packed up which stopped any airflow)


			[[Category:Exhaust]]
			[[Category:Lotus Elise]]
			[[Category:S1]]
			[[Category:S2]]

armitage: sp

2007-02-13T18:39:49Z

← Older revision		Revision as of 18:39, 13 February 2007
Line 77:		Line 77:
	== '''<i>Pricing this project...</i>''' ==<br>		== '''<i>Pricing this project...</i>''' ==<br>

	The cost for one sheet of Nimbus is 85 ~~Euro~~ + VAT (1226*1250mm) <br>		The cost for one sheet of Nimbus is 85 euro + VAT (1226*1250mm) <br>
	Cirrus is available at 90 ~~Euro~~ + VAT (580*1250mm)		Cirrus is available at 90 euro + VAT (580*1250mm)
	Besides that, you will need (prefferably full aluminium) pop rivets and large outside diameter washers.<br><br>		Besides that, you will need (prefferably full aluminium) pop rivets and large outside diameter washers.<br><br>

YvoTuk at 19:03, 12 February 2007

2007-02-12T19:03:20Z

Show changes

YvoTuk at 16:07, 12 February 2007

2007-02-12T16:07:19Z

← Older revision		Revision as of 16:07, 12 February 2007
Line 18:		Line 18:
	Area Density: 1.69 kg/m2<br>		Area Density: 1.69 kg/m2<br>

	'''Thermal'''		'''Thermal:'''<br>
	Thermal Conductivity @ 150 ºC 0.27 W/mK<br>		Thermal Conductivity @ 150 ºC 0.27 W/mK<br><br>
	Hot Plate Temperature Drop @ 150 ºC: 72.3 ºC		Hot Plate Temperature Drop @ 150 ºC: 72.3 ºC<br><br>

	'''Internal Exhaust Test''' (Horizontal flat sample)		'''Internal Exhaust Test''' (Horizontal flat sample)''<br>
	''		No shield:''<br>
	No shield:''		Source: 300 ºC Receiver: 144 ºC<br>
	Source: 300 ºC Receiver: 144 ºC		Source: 500 ºC Receiver: 274 ºC<br><br>
	Source: 500 ºC Receiver: 274 ºC

	''Nimbus Gll (new):''		''Nimbus Gll (new):'' <br>
	Source: 328 ºC Receiver: 50 ºC		Source: 328 ºC Receiver: 50 ºC<br>
	Source: 565 ºC Receiver: 85 ºC		Source: 565 ºC Receiver: 85 ºC<br><br>

	''Nimbus Gll (Dirt impringed):''		''Nimbus Gll (Dirt impringed):'' <br>
	Source: 286 ºC Receiver: 63 ºC		Source: 286 ºC Receiver: 63 ºC<br>
	Source: 493 ºC Receiver: 109 ºC		Source: 493 ºC Receiver: 109 ºC<br><br>

	Surface Emissivity @ 150 ºC		Surface Emissivity @ 150 ºC<br>
	New: 0.28		New: 0.28<br>
	Heat Aged (@ 300 ºC): 0.2		Heat Aged (@ 300 ºC): 0.2<br>
	Accelerated Salt Spray: 0.34		Accelerated Salt Spray: 0.34<br>

YvoTuk at 16:06, 12 February 2007

2007-02-12T16:06:36Z

← Older revision		Revision as of 16:06, 12 February 2007
Line 9:		Line 9:


	==		== '''<i>Nimbus Gll Material Properties</i>''' ==
	'''<i>Nimbus Gll Material Properties</i>''' ==

	'''Construction:''' <br>		'''Construction:''' <br>

YvoTuk at 16:06, 12 February 2007

2007-02-12T16:06:18Z

← Older revision		Revision as of 16:06, 12 February 2007
Line 12:		Line 12:
	'''<i>Nimbus Gll Material Properties</i>''' ==		'''<i>Nimbus Gll Material Properties</i>''' ==

	'''Construction:'''		'''Construction:''' <br>
	Double aluminium sheet, double formed		Double aluminium sheet, double formed<br>
	Materials: 0.3 & 0.125mm 1050A '0' grade aluminium		Materials: 0.3 & 0.125mm 1050A '0' grade aluminium<br>
	Material Thickness: 0.43 mm		Material Thickness: 0.43 mm<br>
	Product Thickness: 5.25 mm		Product Thickness: 5.25 mm<br>
	Area Density: 1.69 kg/m2		Area Density: 1.69 kg/m2<br>

	'''Thermal'''		'''Thermal'''
	Thermal Conductivity @ 150 ºC 0.27 W/mK		Thermal Conductivity @ 150 ºC 0.27 W/mK<br>
	Hot Plate Temperature Drop @ 150 ºC: 72.3 ºC		Hot Plate Temperature Drop @ 150 ºC: 72.3 ºC

YvoTuk at 16:05, 12 February 2007

2007-02-12T16:05:46Z

@@ Line 8: / Line 8: @@
 To understand why to use both, you'd have to understand the characteristics of the material:
-<table align="center" border="1" cellpadding="5" cellspacing="0">
+'''Construction:'''
-		<td colspan="3"><b>Physical</b></td></tr>
+'''Internal Exhaust Test''' (Horizontal flat sample)
-	<tr>
+''
-		<td>Construction:</td>
+No shield:''
-		<td colspan="2">Double aluminium sheet, double formed</td>
+''Nimbus Gll (new):''
-	</tr><tr>
+Source: 328 ºC  Receiver: 50 ºC
-		<td>Materials:</td>
+Source: 565 ºC  Receiver: 85 ºC
-		<td colspan="2">0.43 mm</td></tr>
+''Nimbus Gll (Dirt impringed):''
+Source: 286 ºC  Receiver: 63 ºC
-	<tr>
+Source: 493 ºC  Receiver: 109 ºC

YvoTuk at 15:56, 12 February 2007

2007-02-12T15:56:37Z

← Older revision		Revision as of 15:56, 12 February 2007
Line 13:		Line 13:
	<table align="center" border="1" cellpadding="5" cellspacing="0">		<table align="center" border="1" cellpadding="5" cellspacing="0">

	~~<tr>~~
	<td colspan="3"><b>Physical</b></td></tr>		<td colspan="3"><b>Physical</b></td></tr>
	<tr>		<tr>