001Ben
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| posted on 4/10/09 at 01:01 PM |
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Turbo Manifold
I am starting to strip my car in preperation for the turbo upgrade. It doesn't look like there is alot of room for the manifold unless i modify
the side rail etc. I have had a look at a couple of different manifold designs and was wondering what the advantages/disadvantages of each would be ,
whether there would be any power loss between the two. For info they will be made out of the same matertial.
manifold 1
 
man
manifold 2
 
manif2
Ben
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tegwin
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| posted on 4/10/09 at 01:04 PM |
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That first design scares me greatly....
The second one only slightly...
The "ideal" solution is to have equal length pipes (as im sure you know) or at the very least minimise the difference between the
cylinders..
That first one, cyl 2 and 3 the exhaust pulse comes out of the stubby pipe and smacks straight into the wall of the tube opposite it... not good!
Why dont you extend your primaries a bit and sit the turbo lower down below the chassis rail... that seems to be the "done thing"
[Edited on 4/10/09 by tegwin]
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tomgregory2000
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| posted on 4/10/09 at 01:11 PM |
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for tubo use either will be fine, i would use the first one but the best is an equal length one
should look like this
this is for a car but you get the idea
[Edited on 4/10/09 by tomgregory2000]
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mark chandler
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| posted on 4/10/09 at 02:16 PM |
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The problem with both is that the Turbo exit only allows for a small exhaust, you should try and plumb the turbo a bit further forward to allow for
this, on a bike its not an issue.
2nd one looks the better of the two.
I just cut up a standard exhaust and welded up to a collector for mine, seems to work well enough although a little ugly.
Regards Mark
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djtom
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| posted on 4/10/09 at 03:40 PM |
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Second one is by far the better of the two. As said you want one with equal primaries for best response and power.
However - turbo installations are fairly forgiving to manifold design, and I've been using a log manifold fairly similar to the first one shown
for a couple of years with reasonable results. Try it if it's all you have room for, otherwise go for something with longer equal length
primaries and better flow which will help the turbo spool earlier and release a bit more power.
Tom
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l0rd
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| posted on 4/10/09 at 04:22 PM |
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quote:
Originally posted by djtom
However - turbo installations are fairly forgiving to manifold design
Tom
Just try to look for a Renault 5 GT exhaust header if you want to see a bad design.
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turbodisplay
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| posted on 4/10/09 at 05:19 PM |
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Log manifolds can work well, no1 is a bad example.
You can make up a log manifold using the pipe fittings that have a smooth transistion. I ll try to find a pic on the web.
Darren
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NOTE:This user is registered as a LocostBuilders trader and may offer commercial services to other users
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001Ben
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| posted on 5/10/09 at 08:17 AM |
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quote:
Originally posted by l0rd
quote:
Originally posted by djtom
However - turbo installations are fairly forgiving to manifold design
Tom
Just try to look for a Renault 5 GT exhaust header if you want to see a bad design.
cheers for the replies guys. I have had a look on the bay at renault 5 gt turbo manifold, they definately don't look like the best design that i
have seen so if they work I am sure any design will work
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