exhaust manifold temp?
 

im wondering what are the OUTSIDE temps of a cast iron turbo manifold get like under boost or cruising?
i have older hks log manifold.

This hot.

https://www.rx7club.com/attachment.p...8&d=1242230654

Obviously, inside will be a bit hotter then outside, but won't be that far behind it.

Depending on the setup and everything, I've seen as low as 1450F pre turbo, and as high as 1600F while cruising at ~ 55mph.

Under load.......as low as 1650F, and as high as OMGWTF(which is equal to 1900F :lol:) pre turbo.

So, in short - really fucking hot.

i wanted to wrap the exhaust manifold. i have 1kf continuous/2kf interment wrap and im gonna use the silicon spray on top of it. think it will work?

Just get a roll of DEI header wrap.

I've always used that, works great. You don't need to buy those SS ties either. Just wrap one end tight, and keep wrapping till the end - then stick a hose clamp on it.

Tip though, don't buy the black stuff. It'll just turn natural colour after 3-4 full throttle runs :)

http://www.designengineering.com/pro...asp?m=sc&cid=3

Make a heat shield for the LIM

ya the black one on my dp turned tan after a few months.

im gonna be using aluminum/header wrap on the lim also.

SWEET JESUS:eek:

What you guys think about jet-hot coating on the manifold and the turbine housing?

I think a blanket and a nice heat shield between the turbo and LIM will be a better investment...

im working on an insulator, using header wrap (facing intake manifold) on one side and maybe aluminum foil on the other (facing turbo)

I had a jetcoated turbine housing on my to4s, worked well but it was still hot to the touch. I wrap it now which works 10x better. On the old setup you could see the flange glowing but if you touched the wrap it was just warm to the hand, didn't burn.

I also had a LIM heat shield that went all the way down to the top exhaust mani bolts and the top used some of the ACV fastener locations on my cosmo LIM, I never logged the diff but it was noticeably cooler behind the heat shield after a drive

-Jacob

That sounds good. Dunno how you plan to attach the header wrap...Might want to get this or a similar product to stick on the aluminum on the turbo side:

http://store.summitracing.com/partde...5&autoview=sku

Try to keep the aluminum thin. 0.025" 6061 should work nicely.

When you design the heat shield try to think of the turbo as a source of light (aka radiation). You don't want a direct line of sight from the turbo to any other components that shouldn't get hot.

ill try to grab pics when i get it.
basically we measure bout 13"x13".
we cut straps of the header wrap 7" long and we sorta weaved the pieces together and use silicon to hold each on together.

now im not sure whether to use aluminum foil or that gold stuff DEI sells on the outside of that,
think carbon fiber (have a sheet of it ) can handle the heat? should be much considering i have dp wrapped, exhaust mani wrapped, and turbo blanket on.

Yep, CF would make a better heat shield than aluminum. It will hold up fine. The trick is making the mounts strong enough to withstand the vibrations. You can lay up the CF with pieces of aluminum sandwiched between layers of CF to help distribute the load in the areas where the bolts attach.

The gold foil reflects more heat. I think it reflects 90% radiant heat. Aluminum reflects something like 75% radiant heat.

I've bought gold foil from bimmerworld.com but I later learned of a cheaper source...forget the name but you might find it with a little google work.

ya well we were gonna put the carbon fiber on the outside to make it look decent, didnt know it would block heat as well.

A couple sport bike companies use it on mufflers and as header pipe covers.

that looks a little hot

http://i187.photobucket.com/albums/x...2508686427.jpg

http://i187.photobucket.com/albums/x...2508675459.jpg

Jet-Hot is quoting $250 each for the exhaust mainfold and the turbine housing.
Maybe just some good heat shields or wraps should work.

You will get about 1000% more bang for your buck going with wrap and shields vs. coating.

Can I wrap the turbine housing or just use only the heat shield.

You could wrap it, but its a really difficult piece to cover with 2" strips. A blanket is the easiest/most effective method. Plus pieces like the downpipe, manifold etc. can be removed as units so the wrap once done should never have to come off - even if you remove the part. But if you wrap the turbine up, and ever have to take it off, you'll pretty well be throwing the wrap in the trash.

I am gonna use this. 1 inch strips.
This one can handle 1800 degrees. I should be good.
http://www.designengineering.com/pro...sp?m=sp&pid=95

I think you are right on this. Who makes one that can withstand this heat.