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 Rank: Pro     Groups: Registered
Joined: 09/08/2011 Posts: 399 Points: 1,168 Location: Hertfordshire
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Hey guys, just completed the exhaust installation and noticed that they don't line up fully and look a little wonky?  Now it doesn't say any where that they should be wonky, and I can't really tell from the pictures if the official build is the same Has anybody else found this? I can't see how they could've gone together any other way so can't understand why they don't line up with each other?  The Brawn BuildWentworth Court Dolls HouseThe MP4/4 Build[ulr=http://forum.deagostini.co.uk/default.aspx?g=posts&t=36693]The 97T Build[/url]
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Rank: Pro Groups: Joined: 24/08/2009 Posts: 48,827 Points: -13,348
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If 'wonky' means offset in length, then you have them correctly fitted.
The outlet length of both manifolds purposely differs for the reason stated below, which relates to the design of the real engine.
On all V-engine blocks, the cylinders on one side cannot be perfectly parallel to cylinders on the opposite side.
On MP4-23, the cylinders on left-hand side are offset towards the rear, this means that the exhaust outlet of the left side (looking from the rear) appears slightly longer towards the rear than that of the right-hand side.
In real life the length of the exhaust pipework needs to be the same length on each side to obtain optimum performance, and since the exhaust outlets of the left cylinders are offset towards the rear, it means that the left manifold naturally looks slightly longer than the right-hand manifold when mounted on the engine (when viewed from the rear), which is how it should look and is also reflected in the issue 1 poster.
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 Rank: Super-Elite     Groups: Official Builds, Administrators, Moderator, Global Forum Support, Registered Joined: 04/06/2011 Posts: 4,923 Points: 14,915 Location: ipswich
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Great answer Mr T.....
The only thing you left out is the reason the cylinders can't be parallel.
Pretty obvious though if you think about it - it's because the piston con rods all go to one crankshaft, so the con rod on a 'left hand' piston, has to fit between the con rods of two 'right hand' pistons, and vice-versa, and so-on.
Staggered pistons/con rods = staggered cylinder heads = staggered exhausts.
I'm glad this was raised though, as most of us would also possibly have thought there was a problem with our build.
Roy.
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Rank: Pro Groups: Registered
Joined: 23/09/2009 Posts: 138 Points: 422 Location: Surrey
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I've just assembled the exhausts, which are a bit fiddly. I found that a strategically placed blob of blutac helped a lot. Full details and pictures are on my web build diary. http://mclaren.partworkmodels.co.uk/
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 Rank: Elite   Groups: registriert, Registered Joined: 20/03/2011 Posts: 2,356 Points: 7,122 Location: UK
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Nice build Mark  also like the diary website Spencer
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Rank: Pro Groups: Registered
Joined: 09/08/2011 Posts: 399 Points: 1,168 Location: Hertfordshire
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Well explained! Many thanks, just wanted to make sure I'd done it correctly  The Brawn BuildWentworth Court Dolls HouseThe MP4/4 Build[ulr=http://forum.deagostini.co.uk/default.aspx?g=posts&t=36693]The 97T Build[/url]
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 Rank: Vice-Master  Groups: Registered
Joined: 31/08/2011 Posts: 629 Points: 1,963 Location: Plymouth
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GREAT Web Diary Mark! Great build! Chris
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Rank: Pro Groups: Registered
Joined: 23/09/2009 Posts: 138 Points: 422 Location: Surrey
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Wow, thanks guys. I'm glad you like it.
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 Rank: Semi-Pro Level 2  Groups: Registered
Joined: 09/05/2011 Posts: 78 Points: 236 Location: N.Ireland
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Brilliant site Mark. One thing I did notice that you've done the same as me. Issue 56.Fitting the side panels, you will notice on close observation that they have to be fitted with a gap between bottom of them to allow the panels to sit more toward to centre of the car on each side.They should not protrude over the edge.It will be difficult to get the body to fit neat if they protrude.Done the same myself.Better to fix now than later. 
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