[moe1942]

Many have complained about under hood heat. I finally got around to wraping my exhaust system with heat wrap. It works. Reduced temps greatly. There is no noticeable rise in hood temp after 15 min of WOT.

I never thought it was an issue but had plenty left over after wrapping my Generac exhaust.

 

[JMoe]

Good info! Did you wrap the whole thing or the outlet pipe?

Joel

 

[moe1942]

I wrapped From the head to the tip of the exhaust. Got the wrap at Advance Auto. I got the silicone spray too. It protects and conditions the wrap. Nasty smell when you crank up the first time.

 

[savageactor7]

Huh...maybe I'll do that with the 2550.

I was looking at it last week and the hood didn't seem to fit at snug as it use to around the instrument panel and I was wondering about the heat build up.

We got it last year now it has 80 hrs...it was my understanding CC had resolved that problem before I got the GT...oh well.

Moe I take it you took of the heat shield 1st?

 

[Gary in NJ]

After hearing many pilots complain about cracks in their exhaust, I decided to coat my entire exhaust system with a ceramic coating (I'm going back 15 years so I don't remember the trade name). This coating so effectively removes heat from the exhaust, I can touch the pipes just minutes after a flight.

The bottom line is, if you can remove the heat, you remove problems. The ceramic coating increases the surface area of the pipes, allowing the heat to dissipate faster

Does exhaust wrap insulate the pipes (keeping heat inside the wrap) or help dissipate heat?

 

[JMoe]

Does exhaust wrap insulate the pipes (keeping heat inside the wrap) or help dissipate heat?

Wrapping definitely keeps the heat in. I'm thinking as long as you don't wrap the muffler itself (just the heat shielding), there should be enough airflow to keep the exhaust steel from getting brittle.

Joel

 

[moe1942]

The wrap keeps the heat in and it is recommended to do the muffler too. Not catalytic converters but that isn't an issue.

On the speed circuit it is claimed to increase gas flow which scavenges the cylinders better thereby increasing efficiency. I just wanted to reduce the heat factor.

Yes I did take the main heat shield off. 3 bolts. There is a smaller shield just above the PTO clutch. I didn't need to take that off.


After running 15 minutes I could hold my hand just slightly off the heat shield and it wasn't too hot.

 

[moe1942]

Wrapping definitely keeps the heat in. I'm thinking as long as you don't wrap the muffler itself (just the heat shielding), there should be enough airflow to keep the exhaust steel from getting brittle.

Joel

Wrapping the heat shield isn't possible .

 

[moe1942]

Does exhaust wrap insulate the pipes (keeping heat inside the wrap) or help dissipate heat?

Both.

 

[moe1942]

After hearing many pilots complain about cracks in their exhaust, I decided to coat my entire exhaust system with a ceramic coating (I'm going back 15 years so I don't remember the trade name). This coating so effectively removes heat from the exhaust, I can touch the pipes just minutes after a flight.

The bottom line is, if you can remove the heat, you remove problems. The ceramic coating increases the surface area of the pipes, allowing the heat to dissipate faster

Does exhaust wrap insulate the pipes (keeping heat inside the wrap) or help dissipate heat?

I have heard of a ceramic coating on the inside of cycle pipes. Claims are similar to yours.


CHT and EGT are much greater on an aircraft than out LT's.. and the EGT on the jet fighters I worked caused the titanium AB inner liners to crack. Don't know if ceramics was ever considered for that application.

I think this wrap is effective for our needs. I report, y'all decide.

 

[Gary in NJ]

CHT and EGT are much greater on an aircraft than out LT's

The EGT probes are usually mounted 2 inches from the flange. In that location, at a cruise power setting, the EGT is usually about 1,280F (+/- 50F) in a normally aspirated engine and over 1,500F on a turbo-charged engine. Fuel mixture is used to control EGT. If above 1,280 enrich the mixture (it's adjustable on an aircraft engine to compensate for altitude and temp) and if below you can lean the mixture to achieve best power and conserve fuel.

Yep, it's 1930's tractor technology.

 

[JMoe]

Do you guys think the paper thin exhaust steel will hold up to this kind of heat? I've never wrapped one so I dunno.. Regardless, it sure sounds like it could be a viable option for the late model 2K owners.

Joel

 

[moe1942]

Do you guys think the paper thin exhaust steel will hold up to this kind of heat? I've never wrapped one so I dunno.. Regardless, it sure sounds like it could be a viable option for the late model 2K owners.

Joel

All I read didn't have any disclaimers about guage metal. Actually in theory it should greatly reduce condensation which is death to an exhaust system. I thought the risk return trade off justified the wrap.

 

[moe1942]

The EGT probes are usually mounted 2 inches from the flange. In that location, at a cruise power setting, the EGT is usually about 1,280F (+/- 50F) in a normally aspirated engine and over 1,500F on a turbo-charged engine. Fuel mixture is used to control EGT. If above 1,280 enrich the mixture (it's adjustable on an aircraft engine to compensate for altitude and temp) and if below you can lean the mixture to achieve best power and conserve fuel.

Yep, it's 1930's tractor technology.

I went into aviation maintenance in 59. Got my A&P in 70..Got out in 82.

 

[diesel_nut]

Now just who was it that said to do that............

 

[moe1942]

Now just who was it that said to do that............

Do what nut??

 

[JMoe]

Now just who was it that said to do that............

Actually by many others prior to being graciously accompanied by the musical stylings of 'da nut! :fing32:

Joel