Mrc600

[audiman]

Someone can weld! Very nice work.....

It aint Doug or me! LMAO

Im tempted with putting WG back into DP. Want to hear what it is like when you get it running. Cant wait to have a drive! What you need is a similar spec car to drive for a bit to motivate you?? Where could you find one ???

[Jon441cc]

Nice project
Are the twin recurcs going to dump back into the turbo or to atmosphere?

[Jamo]

I can guess which company welded that, could be the same one that welded my IC up they do some quality stuff! It was like American Chopper inside their company.

Guys you have no idea how big that downpipe is, I saw it in the flesh and said you can't be serious?!

[audiman]

You should have heard what Shane the fabricater said when he looked where it had to go! LOL

[Doug_RS2]

i did weld the Xmember( a few years ago) but the fab shop didn't want those welds seen so redid them all!

The recirc valves are gettting dumped to atmosphere just now - i wanted to get them back into the inlet but too tight a fit for the filter on front of the turbo - I will look at relocating the filter to try and get that to work at a later date.

The fabricator was not too happy with his welds on the downpipe! Some people say they are machine welds - he does it all by hand.

[GT500]

Clever hands!

[WabTheKing]

are you going to wrap the downpipe? can see that getting a tad hot!!

nice work!!!

[Doug_RS2]

not going to wrap it - want to get as much heat out of the DP as possible. The cooler the air gets inside the exhaust after the turbo the freer it will flow. Going to get some heatshields around everything else and cold air to the hot bits.

[Jamo]

not going to wrap it - want to get as much heat out of the DP as possible. The cooler the air gets inside the exhaust after the turbo the freer it will flow. Going to get some heatshields around everything else and cold air to the hot bits.

?

it's the other way round isn't it as cool air has less kinetic energy and will not have the same velocity as hot air within a confined space.

[s2dude]

?

it's the other way round isn't it as cool air has less kinetic energy and will not have the same velocity as hot air within a confined space.

Taken from this site:
link

Wrapping any type of exhaust piping is a crucial and important step when controlling exhaust temperatures and reducing radiant under-hood heat by up to 50%. Keeping exhaust gases hotter within the exhaust system helps in decreasing density and increasing the flow of exhaust gases. This improves exhaust scavenging which, in turn, reduces intake temperatures for increased horsepower gains.

Also, reducing ambient heat under the bonnet makes for cooler intake air temps which is another bonus...Only downside is the exhaust wrap looks horrible compared to that lovely downpipe

Ceramic coating is a good option though

[Jamo]

Dunno my down pipe is wrapped in lovely sky blue material................

[Jon441cc]

I heard wrapping the downpipe on high horsepower motors where Egts become insane will rot any stainless material eventually, or was it mild steel

I will try to find that info, watch this space.

[Jamo]

I heard wrapping the downpipe on high horsepower motors where Egts become insane will rot any stainless material eventually, or was it mild steel

I will try to find that info, watch this space.

That is true Jon depends on your EGT's I suppose.

[WabTheKing]

http://www.camcoat.u-net.com/Exhausts.htm

[s2dude]

I heard wrapping the downpipe on high horsepower motors where Egts become insane will rot any stainless material eventually, or was it mild steel

I will try to find that info, watch this space.

Not 321ss
and it depends totally on the quality of the manifold from what I have read. (welds, material thickness etc)
its a balnace at the end of the day...do the postiives outweigh the negatives?