Melted accelerator cable outer

Vettech · December 16, 2016, 09:48:03 PM

Um - double check tomorrow, but I THINK it's about ~ 90 °C. I should know this, must be getting old.

Vettech · December 16, 2016, 09:50:27 PM

About Ceramic lagging and coatings, I've not used them but have heard they can cause heat stress in the metal causing cracks in welds and at bent points.

bfit · December 16, 2016, 11:25:00 PM

Petrol engine running at full load has exhaust temp in the range of 560 deg C to 700 odd depending On a variety of factors .
Bfit

metalhead · December 17, 2016, 06:34:07 AM

Quote from: Vettech on December 16, 2016, 09:50:27 PM
About Ceramic lagging and coatings, I've not used them but have heard they can cause heat stress in the metal causing cracks in welds and at bent points.

That's more for exhaust wraps, rather than coatings, ceramic coated headers/extractors normally last longer. The ceramic coating holds up much better than paint, and if it's internal as well then it stops the metal from ever getting as hot. Wraps on the other hand trap both heat and moisture in with the steel. They can also be wound on too tight, restricting expansion of the pipe when it gets hot. Wraps may reduce the life of headers/extractors quite a bit.

sirfixalot · December 17, 2016, 08:51:05 AM

RHD vet you need to fabricate an L shaped bracket which bolts to the two spare bolt holes on manifold below carby on L/hand side. Then run cable out around the front & back onto carby

Vettech · December 17, 2016, 11:55:44 AM

That's at full tilt Bfit, on a STD C4 87 after run up to temp we have the following.
OIL - 90°C
Water - 88°C.
Readings taken at idle on the crest of each exh manifold ~25mm from the flange.
1. 150°C. 2. 189°C.
3. 202°C. 4. 223°C.
5. 226°C. 6. 220°C.
7. 218°C. 8. 240°C. So 215~230 may be normal.

I would assume 1&2 are cooler as they get more air from the fan which is cycling.
These are "as of" 10 minutes ago, But 150 & 189 could he a worry.

I have not looked at a C3 for years and I cant climb over the storage and chickens to get to it.
The C4 has metal shields around the headers, these cut "radiation" markedly, and air flow thru them takes the heat away and under the car.
I suppose at the end of the day if the oil and water temps are within spec then all is fine.

Darylle · December 24, 2016, 01:53:10 PM

Hi vettech
How did you get the oil and h2o temps?

Vettech · December 24, 2016, 05:24:53 PM

Ahaaaaaa!. It's a C4 lad. Switchable digital read outs in the instrument cluster. You can select Imp or Metric, also the four readouts can display three (3) modes each, for interest sake, 1. Oil Temp 2. Off 3. Oil pressure. Some people should have them off, because they frett over what they see, they fail to understand that an internal combustion engines parametres are always in a state of flux, changing all the time depending upon conditions - like an insurance policy!?!?!?!?!.