View Full Version : They're back...
...bugger, something else to try not to buy for the Q4!!! (http://cgi.ebay.co.uk/Alfa-Romeo-155-Q4-tubular-manifold_W0QQitemZ140256601674QQcmdZViewItem?)
wrinx
did anyone try them out yet?
Pavs has bought one but no report....looks like we'll have to wait for Jim to tell us :biggrin:
wrinx
...and a friend of mine also.He said that is made quite poorly.In some spots there are even weld missing :).If you ask me...i wouldnt go for it.
That's worrying, the guys feedback says they are good....
wrinx
That's worrying, the guys feedback says they are good....
wrinx
Its the long term feedback that concerns me more....
jimnielsen
10-08-08, 10:17
well, it'll be here next week - I will let you all know what its looks like and how it performs.
jim.
Mine is on the car at the moment, wich finaly runs as it should.
Looks okay, only the rolling road report has to wait a little.
Next week the D2 shocks are being adjusted plus some work under the bonnet. (New plugs for some electrics.)
Week after that probably the long awaited numbers.
Car feels good with the exhaust-manifold in place.
Probably quicker than with the old factory one, but that is my personal feeling. (Pick up feels smoother.)
The outside is not equally shiny everywhere, after it has been heated by now. But as i don't care for it looks, no problem.
Picture added:
http://i34.tinypic.com/25hmo11.jpg
jimnielsen
12-08-08, 23:28
I am going to have the manifold ceramic coated (on the inside) to keep some of the heat inside it better. I used to use exhaust wrap (on my last race car (now sold)) - but its always a real pain to install and it does not last too long either.
jimn~
Are you sure? Ceramic is applied with a thermic lance so I don't know how you are going to get past the first bend.
Also, what happens when a bit flakes off and goes through the turbo?
jimnielsen
13-08-08, 08:22
Well, I'm not so sure after reading your post!!! Back to exhaust wrap :(
Why not just get it coated on the outside?
http://i103.photobucket.com/albums/m127/Deltona_II/Exhaust%20manifolds/DSC01929.jpg
Exhaust wrap is rubbish, but really if you add anything to your manifold it could give the vendor cause to refuse any refund.
Looking at Jans earlier pic I would suggest a heat sheild in between it and the head, when that thing glows it's going to boil the oil in your head.
cuore_sportivo_155
13-08-08, 19:53
neither wrapping or coating is advised on the outside of a stainless steel header, the heat buildup could be too much for it. Stainless steel headers keep the heat inside a lot better than cast iron ones anyway... Wrapping a stainless header CAN cause corrosion, but can't remember how they call it now as it's been a while since I fllowed this discussion (on alfabb.com, FWIW)
[QUOTE=cuore_sportivo_155;9243] Stainless steel headers keep the heat inside a lot better than cast iron ones anyway...QUOTE]
It would be if the SS was as thick as the cast iron, but it's not....
They are also a lot closer to the components around them than an OE one.
I've got a recipe for a cheap, but effective sheild if anyone needs to know.
jimnielsen
13-08-08, 22:53
Yes, it looks a lot closer to me - might need that shield... Anyway i'd sure appreciate the "recipe" .. are the headers in your picture using it? I have a digital temp guage.. i'll measure the heat output of the current cast iron headers so that I can compare it to the "new" ones...
thanks, jimn~
I would like the "recipe" also.
New manifold is close to the head of the engine. And gets pretty hot.
Any knowledge is apriciated.
Jan.
It was pretty simple and cheap, I bought a Plumbers* heat proof mat (or solder mat) these mats are used to protect things from the direct heat from a Plumbers blowlamp so I knew they were good:
http://www.dm-tools.co.uk/product.php/section/5329/sn/MON2348
Then I sandwiched it inbetween two pieces of SS sheet, I held it together with rivets. It is flexible so I could form it to shape, then just drill and fix it in place. As 'cuore_sportivo' said, SS is a bad conductor of heat so it is ideal.
You can use just a piece of polished SS if you like to make it more simple, but it isn't as effective.
*Plumber/heating engineer: Someone who installs water pipes to your house etc.
Hope this helps. :smile:
jimnielsen
18-08-08, 05:06
Thanks! - Well the exhaust manifold has arrived. It look great. No problems with welds or anything else I can see for that matter. It will be interesting to see how it goes...
See pic..
I am going to have them coated here..
http://www.jet-hot.com.au/products.htm
before I put them on the car.
jimn~
It is flexible so I could form it to shape,
Do you have a picture of the final article?
I'm thinking just a straight piece with a bracket to fasten it vertically to the cam-cover....
wrinx
Do you have a picture of the final article?
wrinx
I'm afraid I don't and my camera has just packed up on me otherwise I would. If you get the components as described then just make one up the shape and size you require.
I've got the matting but my imagination is working overtime with the possible artistic shapes and materials which could be employed :roll:
Need to fit the damn manifold first...seem to have lost motivation (too cold!) at the moment :?
wrinx
Motivation? Yeah tell me about it, although once you're stuck in it's ok, it's just the intial problem of getting yourself out of that warm comfy chair. :smile:
If you need to form the shield into more complex shapes then consider it in aluminium, it's easier to form.
Thanks! - Well the exhaust manifold has arrived. It look great. No problems with welds or anything else I can see for that matter. It will be interesting to see how it goes...
See pic..
I am going to have them coated here..
http://www.jet-hot.com.au/products.htm
before I put them on the car.
jimn~
Jim what is the cost for that coating?
and me :D
ups.... this msg should be deleted. :D sry
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