Steve Mc.

Have you not factored in the increase in power to weight ratio obtainable by replacing the stock headshields with thermal wrapping materials? I bet that adds another bhp or so.

Moray
bbs.22b.com

 

I have On my car 3kg = 1hp

 

Yes but what happens when the material gets wet? and smelly? Surley that add weight until it dries out....

As for thermal stress, logic would tell me that keeping the turbo hot with a blanket, will be bad in the long run, as it'll take ages for it to cool after a blast. You'll have to set your turbo timer to R5gtt mode!

F

 

Not sure about increasing the thermal stress, If the turbo is rated to 900C then anything below is not going to be a problem IMHO

The insulating jacket may even improve any thermal cycling issue as the cooldown will be more gradual

The turbo has its own cooling water jacket to protect the bearings, even with the engine switched off the cooling water circulates naturally up through the header tank. Turbo timers are really only necessary with oil cooled turbo's (R5gtt )

 

Selective quotation to make me feel better about the delivery of rather expensive exhaust wrap that day Moray

The other thing is if I didn't wrap them I would be scared what it would melt something or add a zillionth of a degree to my oil temp

 

John,

I figure that, assuming you don't run with an undertray fitted, the scooby headers are well exposed to a flow of fresh ambient air, so wrap will help to retain more of the useful thermal energy and gas velocity but is unlikely to manage to keep enough in to cause structural failure. It should also make it safer to drive and park the car on dry grass too. Besides, a well wrapped set of tubular headers looks very cool!

Moray
bbs.22b.com

 

Hopefully T-uk will help me then because I'd end up wrapping myself in it if it had anything to do with me I have been known to hold a spanner, but I don't do it with poise and accuracy like some and I end up getting a hammer out to hit it if I need to put for than about 10lbft on it

 

Moray

I think an easier course of action is to lose about 5 stone - that way I'd be well sorted..

Yes I do have a way with words... I was always useless at English.... Got a Grade A in Lang/Lit - but what does that mean when I dont even know what adjectives, verbs and nouns are - my Dad tried to explain them to me the other day

Ooops sorry - I digress.....

You still got the beemer?

 

A couple of years ago, we had a customer in who had wrapped his turbo in exhaust wrap. It had all melted, truning to glass which had bonded onto the turbo.

A lovely mess

 

John,

If I correctly recall what you do as your day job, I would think you would be fairly good at bandaging things?

Steve,

The M3 is up for sale , now my scoob is back on the road again. . I'm now gutted as I had wrapped my tubular headers before I read your post!

Moray

 

Moray, I always found a friendly nurse to do that bit

Messing about with the oily bits on cars is not unlike orthopaedic surgery. Fingers get trapped, drills don't work, you lose bits, various fluid leakages, and then the thing doesn't work afterwards Oh and you always end up with three bits left over

[Edited by john banks - 6/27/2002 5:52:11 PM]

 

Moray

Back on the road - so it'll still have been off the road longer than on it - you put a std engine back in?

 

John,

LOL.


Steve,

It's been back on the road for a few months now. You may not be far off with your estimate though, but the extended immobile periods are due to the "efforts" of a couple of, from hindsight, in my considered opinion, incompetent tuning outfits.

I ended up doing all the work myself (except the actual engine rebuild as at the moment i dont have a suitable place to do it), with help and advice from a couple of friends who know what they are doing ( thanks guys ). Suffice to say, the engine isn't a standard STI 3 motor, it even has wrapped headers!

Regards,

Moray

[Edited by MorayMackenzie - 6/28/2002 12:03:13 PM]