[COOPER S KID]

hi guys ,
just wondering if and what i would gain from heat wrapping my new extractors before they go on today or tommorrow ??? also when i had my standard extractors heat wrapped, the exhaust place that did it said that they soaked the heat wrap in water for 5 minutes before they wrapped the extractors ! why was this done ?? only thing i can think of is, so they can wrap and pull the heat wrap tighter around the extractors......??????

[Baker]

Its not worth having them wrapped - the Mini is pretty low under bonnet temps anyway, and it is not really that good for your cat/head, as it forces the heat to go that way rather than allowing it to expell it.

If you're going to do it you should get them sprayed properly rather than just wrapped, but its still not something that is needed - also, in your application you'd be better off with the shiney looking ones

[COOPER S KID]

hey kev do you know the closest hpc coating place around ??? do you think i really need the heat shields or one or the other so you might be able to see shiny extractors ???
also what did you want to pm me about ?????
thanks man !!

[MickyD]

I think the idea of the wrap is to keep the heat in (derr), which can make the gases flow faster due to less boundary layer turbulence.

whether this post has any relevance is a different matter

[n00b]

Higher heat = higher gas velocity so more gas ooshing out of there.

The heat wrap (if it's a good one...and an effective one too) will block the heat out of the engine bay and traps it inside which should promote a higher velocity of the darn gas. Same theory applies to HPC coated stuff. Whether it gets you more power or not....no one knows

EDIT: Micky beat me to it

[COOPER S KID]

ok after reading both micky and noob's post it would seem to me that it would be better to get it done than not to !! great done deal ! its already been organised..........thanks guys !!

[OZChris]

My comment's a little late, however my last set of extractors (not MINI) were done by a mob in Bayswater.

[COOPER S KID]

nah its allright got an hour or two left !!

chris did the MOB in bayswater heat wrap them for you ??? haha lol

["Megan"]

Quote: Originally Posted by COOPER S KID

ok after reading both micky and noob's post it would seem to me that it would be better to get it done than not to !! great done deal ! its already been organised..........thanks guys !!

Not wanting to sound rude or anything, but what is this car going to be worth by the time you have finished with it? And what are your plans for it? Just got me curious....

[COOPER S KID]

hi megan ! im not sure what the car will be worth when im finished if i ever finish !! i already take the car to car shows and compete against other people and there cars obviously ! so i want and need to make my car as highly modified as possible to keep up with the other highly modified cars that are constantly changing to be the best as well and i also want it to be the most modified mini around which im pretty sure it is !! basically the show car scene im in is very simillar to the fast and the furious style of stuff ! have you heard of the AUTOSALON car show series ? you should check it out ! and as you can understand in a scene with those types of cars it is so unbelievably hard to modify my car to compete and also to impress the crowds and others at the show thats why im constantly doin somthin to my car or have had to do some pretty hardcore mods to have the car the way it is !! my fingers are killin me im stoppin now ! hope that explains my twisted head !!!

["Megan"]

Quote: Originally Posted by COOPER S KID

hi megan ! im not sure what the car will be worth when im finished if i ever finish !! i already take the car to car shows and compete against other people and there cars obviously ! so i want and need to make my car as highly modified as possible to keep up with the other highly modified cars that are constantly changing to be the best as well and i also want it to be the most modified mini around which im pretty sure it is !! basically the show car scene im in is very simillar to the fast and the furious style of stuff ! have you heard of the AUTOSALON car show series ? you should check it out ! and as you can understand in a scene with those types of cars it is so unbelievably hard to modify my car to compete and also to impress the crowds and others at the show thats why im constantly doin somthin to my car or have had to do some pretty hardcore mods to have the car the way it is !! my fingers are killin me im stoppin now ! hope that explains my twisted head !!!

Wow - sorry about the sore fingers LOL. Sounds like it is a project with no end date Yikes. Would love to see some pics of this beastie of yours You'll have to let us know how you go at the shows too. I would imagine the competition is damn tough! Good luck! Nice to know there is a MINI giving them some competition.

[COOPER S KID]

haha ! nah thats cool fingers are allright now, ill let you know what happens at the shows for sure ! sent you a pm !

[obehave]

I've done header wrap and HPC coating both work but if you're doing a show car the wrap looks good brand new but if you really drive the car it will discolor. For looks you would end up changing it frequently.
If your car is a trailer queen then that's a different matter.
Some of the newer high gloss and satin finishe temp coatings are very nice. I don't think they work as well as the more robust very high temp products but they do look nicer than the usual grey, dark grey and white choices you get with thervery high temp coatings.

Either way you go I think you will be happy with the heat reduction. You will notice it.

[Baker]

Quote: Originally Posted by MickyD

I think the idea of the wrap is to keep the heat in (derr), which can make the gases flow faster due to less boundary layer turbulence.

whether this post has any relevance is a different matter

Thats very true, but you've also got the disadvantage of having a hotter exhaust gas which is really bad for cats and mufflers... so its always a tradeoff.

Obe, I really don't think you'd have a noticeable difference from coating your headers - as in a before and after test. The only difference I would think may be heat soak in the intercooler, but as I'm running a larger intercooler I have not noticed that.

Then again, this is all what I've theorised in my head... from research and reading , without any real-life proof of back-to-back testing.

I'm actually thinking of proving that theory that I have - I'm considering (when I've got a bit of spare money) buying another (identical) set of headers, getting them coated (I can get them sprayed with a much better coating than HPC through a contact I've got, but unfortunatly it'd only be for me), and sticking them on, seeing if there is any difference.

[St00ge]

i've read that you can crack the headers due to the extra heat. Be careful

[MickyD]

Quote: Originally Posted by Baker

T a hotter exhaust gas which is really bad for cats and mufflers... so its always a tradeoff.

it may be bad for mufflers, but I dunno about cats... otherwise why would mfr's put the cat as close as possible to the exhaust manifold for faster heating (and therefore faster light-off time)

[Baker]

Excess heat cooks them.. hence if you look at the JCW Race manifold/exhaust they actually either remove the cat or place it much further back in the system, to prevent it getting so hot. Also look at more race setup cars, they've tended to blow cats out due to heat, even with standard systems.

[MickyD]

cool
(actually, not cool, kinda hot in fact)

[OZChris]

Quote: Originally Posted by COOPER S KID

nah its allright got an hour or two left !!

chris did the MOB in bayswater heat wrap them for you ??? haha lol

Yeah, ceramic coating

[obehave]

Quote: Originally Posted by Baker

Thats very true, but you've also got the disadvantage of having a hotter exhaust gas which is really bad for cats and mufflers... so its always a tradeoff.

Obe, I really don't think you'd have a noticeable difference from coating your headers - as in a before and after test. The only difference I would think may be heat soak in the intercooler, but as I'm running a larger intercooler I have not noticed that.

Then again, this is all what I've theorised in my head... from research and reading , without any real-life proof of back-to-back testing.

I'm actually thinking of proving that theory that I have - I'm considering (when I've got a bit of spare money) buying another (identical) set of headers, getting them coated (I can get them sprayed with a much better coating than HPC through a contact I've got, but unfortunatly it'd only be for me), and sticking them on, seeing if there is any difference.

Back in the day....
Don't you hate it when old people start out with that??

Seriously though.
I have done the wrap and HPC on headers for V8s in trucks I used to drag race.
I makes a difference. A very noticeable difference.
Most of us weren't all that scientific back then it was, "faster in the quarter? Must be good." I can't say it reduced 1/4 miles times but I can with no hesitation tell you it lowered under hood temps. A HUGE benefit was, if you've ever changed plugs or pulled them to read after a hard run on a small block Chevy with headers the odds of leaving human tissue on the header was reduced
Nobody wore gloves... that was for sissies