I have decided to renew the rear pu brackets and heat shields on my car and have ordered the brackets through Porsche @ £151 for the four brackets.
The 2x small exhaust heat shields are also destroyed with one completely missing. :nooo:
The two heat shields are placed on the exhaust pipes between the cat and the mufflers. They cost 125 euro
Looking at the remains of the heat shield that partially survived it is easy to see that these things are of flimsley construction being made of really light mild steel sheet with a very thin galvanising coating.
The way that they are attached in two places is also very poor and I can see how the two attachment points represent a significant weak point where the heatshield will tear and come loose with engine vibration.
Because of their relative high cost, poor design and work involved to replace them I decided to explore an alternative solution.
I remember seeing rally cars being serviced and have noticed exhaust manifold pipes that were wrapped with a heat insulating material to protect ignition components and rubber pipes in rallycar engine bays.
There is a company near me that builds rally cars so I called with them today to discuss the problem.
A really friendly chap showed me the tape used and explained that it is an excellent product and can withstand really harsh environments-
Temperatures over 1000C on Impreza turbo exhaust.
High shock loading on rally stages.
Reduces engine bay temperatures resulting in cooler induction air and increased power figures. (Colder air is denser resulting in more efficient combustion)
He explained that to fit the tape you just tightly wrap it around the exhaust and secure it with stainless steel cable ties, the type that are used on CV boots.
he also explained that when you first start the car will get some smoke and a smell of burning toast for a few minutes as the tape beds in.
I bought some of the tape from him and some Stainless steel cable ties at a cost of £19.
When I got home I fitted the tape and started the car and let it tick over. I have a digital multimeter with a Thermocouple temperature sensor attachment so I took a few readings by placing the Thermocouple about 5 mm from the cat (with no heat shield attached) and then 5mm from the tape protected exhaust pipe.
At the cat I recorded a temperature of 178C and at the exhaust pipe I recorded 65C which pleased me.
I have a good feeling about this modification and am sure that it will be an improvement over those poor quality heat shields. (and certaintly a lot cheaper)
Exhaust heat wrap-
http://cgi.ebay.co.uk/
Stainless steel cable ties-
http://cgi.ebay.co.uk/
The 2x small exhaust heat shields are also destroyed with one completely missing. :nooo:
The two heat shields are placed on the exhaust pipes between the cat and the mufflers. They cost 125 euro
Looking at the remains of the heat shield that partially survived it is easy to see that these things are of flimsley construction being made of really light mild steel sheet with a very thin galvanising coating.
The way that they are attached in two places is also very poor and I can see how the two attachment points represent a significant weak point where the heatshield will tear and come loose with engine vibration.
Because of their relative high cost, poor design and work involved to replace them I decided to explore an alternative solution.
I remember seeing rally cars being serviced and have noticed exhaust manifold pipes that were wrapped with a heat insulating material to protect ignition components and rubber pipes in rallycar engine bays.
There is a company near me that builds rally cars so I called with them today to discuss the problem.
A really friendly chap showed me the tape used and explained that it is an excellent product and can withstand really harsh environments-
Temperatures over 1000C on Impreza turbo exhaust.
High shock loading on rally stages.
Reduces engine bay temperatures resulting in cooler induction air and increased power figures. (Colder air is denser resulting in more efficient combustion)
He explained that to fit the tape you just tightly wrap it around the exhaust and secure it with stainless steel cable ties, the type that are used on CV boots.
he also explained that when you first start the car will get some smoke and a smell of burning toast for a few minutes as the tape beds in.
I bought some of the tape from him and some Stainless steel cable ties at a cost of £19.
When I got home I fitted the tape and started the car and let it tick over. I have a digital multimeter with a Thermocouple temperature sensor attachment so I took a few readings by placing the Thermocouple about 5 mm from the cat (with no heat shield attached) and then 5mm from the tape protected exhaust pipe.
At the cat I recorded a temperature of 178C and at the exhaust pipe I recorded 65C which pleased me.
I have a good feeling about this modification and am sure that it will be an improvement over those poor quality heat shields. (and certaintly a lot cheaper)
Exhaust heat wrap-
http://cgi.ebay.co.uk/
Stainless steel cable ties-
http://cgi.ebay.co.uk/