Custom 200TDI Manifold

Having embarked on a rebuild of my 200 TDI (Defender) engine, it would seem the final piece of the puzzle will be the manifold, the rebuild is complete, but it looks like the current manifold is quite restrictive, not particularly good at retaining heat and also the ports don't seem to align particularly well. I know that Fourby do a twin inlet manifold, but this for a 300 TDI, but this will mean relocating my turbo and other engine bay reconfiguration, which isn't something I want to do. Does anyone now of any other options or custom options for a 200 TDI? I have put out some feelers with a couple of fabricators, but am interested if anyone else has successfully done this before?

https://www.landyzone.co.uk/land-rover/ricks-200tdi-tuning-guide.254178/

Have you seen this

Turners also modify heads

Thanks for that, I have that all covered, using a madman multi gauge to measure temps pressures etc, internals, heads, intercooler, turbo, exhaust all done (bar heat shielding), but its the Manifold that seems to be the last element

This is the Fourby Manifold
https://fourby.co.uk/Tdi-Twin-Inlet-Performance-Manifold

Sounds nice but apart from
“When you supply each cylinder with the same precise dose of air, at the same pressure, then you harmonise the torque given to the crankshaft for every power stroke.”

is there any other measureable benefit claimed

Not sure, I was working of the basis the air would flow freer and potentially I could get it ceramic coated, primarily keeping the heat in the manifold and out of the engine bay. Keeping the temps down has got to be a winner, should create some minor performance gains, but if I can do the down pipe at the same time, I should help managing the engine bay temp and make the turbo more effective.

I'm confused, are you looking at the inlet or exhaust manifold? That twin branch inlet looks nice but I doubt it does anything. The turbo is feeding the air into the plenum at positive pressure so I don't think the flow part matters in the same way it does with a naturally aspirated inlet. There's some test on the web somethere with ports being moved out of line to see what difference it makes, about 1/4" off makes hardly any, even the guys doing it were suprised. If its exhaust then its either pay shed loads or make your own. I need a very simple one for my Perkins and I'm going to fab it myself out of mild steel - parts are only about £30 buying ready made bends. If its a success and I get the fit right I'll probably re-make the same thing in stainless but that gives me time to improve my welding!

Looking at the exhaust manifold, I was going to get a local Fabricator to do it, as he made my downpipe after I had to change out my Allard ANT and did a great job, I wanted to see if anyone else had done it, had any pics or experience of doing it.

I would agree with rob on the inlet manifold, and would concentrate your efforts on the ex manifold, but even then I cannot see it making a huge difference, must be one of them things, the law of deminishing returns.
Iirc allard used to do a vgt for the 200 and 300 models, was expensive circa 1k ish, edit its 1.5k.

http://www.allardturbosport.co.uk/index.php?page=Defender-and-Discovery-200-300-TDI

I am sure there is an old thread where the guy fitted a vgt off a vag motor onto a custom 4 branch ex manifold, might be worth a search, he certainly did a lot of research and effort to get it right.

I've replaced the Allard VGT with one from Allisport. I'll have a search for that thread, thanks for the pointer

steve2286w said:

is there any other measureable benefit claimed

Click to expand...

looks good & gets instagram likes??

rob1miles said:

That twin branch inlet looks nice but I doubt it does anything. The turbo is feeding the air into the plenum at positive pressure so I don't think the flow part matters in the same way it does with a naturally aspirated inlet. There's some test on the web somethere with ports being moved out of line to see what difference it makes, about 1/4" off makes hardly any, even the guys doing it were suprised.

Click to expand...

look up 'twin plenium' manifolds

https://www.bufkinengineering.com/intake manifolds.htm

audi played with manifolds on the Quatro group B rallycars (old tec now!) but that'll give you an idea








if you're getting the hot-glue out then maybe this is a direction to look in?

Rich.

I'm chatting to the my trusted fabricator, i'll do a bit more research and report back where I end up. I'm hoping to get my Landy back this week or next, so will also share the work to date as I embark on a month of running in!

@Nardo90, did you get anywhere with this?

Rich.