[flipsidenv]

What's the 954 header made from? SS? TI? I don't know my metals and I've looked through the threads. Someone mentioned in a previous thread that it might be TI but wasn't sure. Nobody contradicted so I'm curious. I'm wrapping the headers and have read not to wrap if it's TI. Anybody know?

[bladeracer]

Originally Posted by flipsidenv

What's the 954 header made from? SS? TI? I don't know my metals and I've looked through the threads. Someone mentioned in a previous thread that it might be TI but wasn't sure. Nobody contradicted so I'm curious. I'm wrapping the headers and have read not to wrap if it's TI. Anybody know?

The HTEV and headers are ti and mine are wrapped.
The midpipe is stainless.

[flipsidenv]

Originally Posted by bladeracer

The HTEV and headers are ti and mine are wrapped.
The midpipe is stainless.

I've read numerous articles regarding wrapping TI how it degrades or breaks down when wrapped. I did read one particle article stating that it would take 30+ years to ruin TI. I know that's a long time but it's the only statement I found that mentioned that long a period. How long has your header been wrapped and have you noticed any metal break down? Your saying you think it's safe to wrap TI? I would just be wrapping the header to keep the heat down. Would this have any adverse effects on the HTEV such as plating quicker than usual? I'm curious so I know what to expect.

[bladeracer]

Originally Posted by flipsidenv

I've read numerous articles regarding wrapping TI how it degrades or breaks down when wrapped. I did read one particle article stating that it would take 30+ years to ruin TI. I know that's a long time but it's the only statement I found that mentioned that long a period. How long has your header been wrapped and have you noticed any metal break down? Your saying you think it's safe to wrap TI? I would just be wrapping the header to keep the heat down. Would this have any adverse effects on the HTEV such as plating quicker than usual? I'm curious so I know what to expect.

Like you, I've seen some rumours about not wrapping ti but nothing concrete. The OEM headers aren't exactly rare though or expensive so it wouldn't concern me anyway :-)
I wrapped mine early last year to reduce heat radiated into the engine and oil. I misled you though as I'm running a full ti Akrapovic system that's wrapped - rather than the much thicker ti OEM headers.
Don't know what you mean by "plating" quicker than usual.

[flipsidenv]

Originally Posted by bladeracer

Don't know what you mean by "plating" quicker than usual.

Would carbon build up on the HTEV faster considering you're pulling more exhaust through. I know it's not that much more and the extra amount might be insignificant but it still makes me wonder.
Is the wrapping going to throw the fuel/air ratio off? I have a pc installed with a generic map off dj website for a bolt on two brother exhaust. I plan on having a custom map made eventually. I'm just trying to think of everything it may effect. Thanks for the info bladeracer.

[bladeracer]

Originally Posted by flipsidenv

Would carbon build up on the HTEV faster considering you're pulling more exhaust through. I know it's not that much more and the extra amount might be insignificant but it still makes me wonder.
Is the wrapping going to throw the fuel/air ratio off? I have a pc installed with a generic map off dj website for a bolt on two brother exhaust. I plan on having a custom map made eventually. I'm just trying to think of everything it may effect. Thanks for the info bladeracer.

The exhaust gas would be hotter but I don't know how that might affect carbon build-up. I don't know what you mean about pulling more exhaust through since it's the same whether the headers are wrapped or not.
Certainly nothing that happens inside the exhaust system is going to affect the air/fuel ratio at combustion though.

[flipsidenv]

Originally Posted by bladeracer

The exhaust gas would be hotter but I don't know how that might affect carbon build-up. I don't know what you mean about pulling more exhaust through since it's the same whether the headers are wrapped or not.
Certainly nothing that happens inside the exhaust system is going to affect the air/fuel ratio at combustion though.

I was under the impression that by wrapping the header you are essentially moving the point at which heat is lost farther down the line and making it easier for the exhaust gases to exit. This makes the exhaust gases exit the engine at a greater velocity. Is this wrong?

[bladeracer]

Originally Posted by flipsidenv

I was under the impression that by wrapping the header you are essentially moving the point at which heat is lost farther down the line and making it easier for the exhaust gases to exit. This makes the exhaust gases exit the engine at a greater velocity. Is this wrong?

Never heard of that before but I guess it's possible.
I still can't see any way for it to affect the air/fuel ratio though as that happens before it becomes exhaust gas.
Only way to know for sure is to try it I guess. Do you have an air/fuel measuring device?

[flipsidenv]

Originally Posted by bladeracer

Never heard of that before but I guess it's possible.
I still can't see any way for it to affect the air/fuel ratio though as that happens before it becomes exhaust gas.
Only way to know for sure is to try it I guess. Do you have an air/fuel measuring device?

I don't have a measuring device. I suspect if there is any difference I will feel it on that first ride but considering I haven't read anything regarding that and many people have wrapped the header, I'm guessing there won't be any difference. It was just something that I was thinking about.
I did a search for headers and they do seem to be readily available at reasonable prices so if a problem does arise with the wrapped ti headers it should not be that difficult to fix. Granted this may be years down the line. It'll be nice to remove some of that heat from "under the hood".

I removed the pair valve. The fan is now struggling to keep up with the city driving. That's what started this whole series of questions. New coolant and the wrap should show considerable improvement. Thanks again for the info.

[BurtonF166]

This thread is near the topic I wanted to ask about, and I didnt want to start a new thread.

Where is a good place to used after-market headers from the 929rr or 954rr, from what I know they are interchangeable.

Any pointers are appreciated.

*I have searched here and ebay

[PHX_954]

I think what you are trying to get at is, by wrapping the header and keeping the heat in the exhaust, in theory, you increase the scavenging affect of the exhaust, thus creating a more efficent exhaust. If anything, it's only gonna gain you a fraction of any bhp... I plan on wrapping mine also. As with others, I'm doing it to keep the heat down... As far as wrapping TI, no clue.

[PHX_954]

Originally Posted by BurtonF166

Where is a good place to used after-market headers from the 929rr or 954rr, from what I know they are interchangeable.

Any pointers are appreciated.

*I have searched here and ebay

Are you looking for OE (stock) headers or aftermarket? If you're looking for aftermarket, I would think you need the entire system.

[BurtonF166]

Currently I have the stock setup + a jardine slip-on.

I'm looking for just the header because ill be doing my own custom piping from there back...