having trouble with maniflow
Turbo Mini Forums

im having trouble with my maniflow large downpipe. Ive got it to fit on the manifold properly without knocking, but the link pipe is too small and i dont know how you deal with this ive had no experience of it, the last standard metro downpipe was perfect size for my playmini link pipe and backbox. I tried making the flanges bigger on the linkpipe to clamp round the downpipe, but it still managed to flal off. The downpipe is about 5mm wider than the link pipe, its as if i need a exhaust size convertor or something, but i might have made them up! Also, cant weld it because link pipe is stainless :(

thanks

james

Previous Engine: 1040cc Morespeed engine, 1275 turbo head T2 Turbo Mirage Manifolds Megajolt
Previous engine: STD metro turbo, megajolt
Drives: 399bananahp (flywheel) Honda Civic Vtec b18c4 T28 Turbo 1968 Mini

Megajolt maps to download: http://www.jamesfawcett.co.uk/cms/index.ph...&gid=3&Itemid=3

basically the playmini system is too small. you need to sleeve the downpipe to get it to fit.

the maniflow systems are slightly bigger than most being 2" id rather than OD i think. my maniflow system mates nicely with the downpipe.

Yeah agree with Iain, I have a maniflow downpipe and a playmini system, with the one I have, the exit of the downpipe is exactly the same size as the entry to the link pipe, hence it won't fit. When I have finally got the engine built and in the car I am going to get a mate to weld a sleeve over the playmini link pipe to accept the maniflow downpipe.

thats not good news, i have 3 days of it left on ebay and it needs to be ready. At least i dont have to do the twatting exhaust clamp again! im wondering, what would hapen if i cut flanges into the maniflow donwpipe end, will it then clamp onto the link pipe if i tighten it up enough?

Previous Engine: 1040cc Morespeed engine, 1275 turbo head T2 Turbo Mirage Manifolds Megajolt
Previous engine: STD metro turbo, megajolt
Drives: 399bananahp (flywheel) Honda Civic Vtec b18c4 T28 Turbo 1968 Mini

Megajolt maps to download: http://www.jamesfawcett.co.uk/cms/index.ph...&gid=3&Itemid=3

I severely doubt it, it might stay together for a bit if you are lucky but it certainly won't seal very well and so will blow like monica lewinsky.

anyone know the diameter of the maniflow downpipe? Need to know to tell people

Previous Engine: 1040cc Morespeed engine, 1275 turbo head T2 Turbo Mirage Manifolds Megajolt
Previous engine: STD metro turbo, megajolt
Drives: 399bananahp (flywheel) Honda Civic Vtec b18c4 T28 Turbo 1968 Mini

Megajolt maps to download: http://www.jamesfawcett.co.uk/cms/index.ph...&gid=3&Itemid=3

A full maniflow single box system is about £90 with side exit stainless pipe.

its easy enough to sleeve it with some tube if you can find a bit.

Feebleuk

If you have a mig set just weld them together.It wont be a problem,mild steel welds easily to stainless. If anything you will probably find it a little easier to weld and there will be less liklyhood of porosity.

mild steel to stainless with mig? not with decent weld quality, now tig would be a different story.

And on the 7th day........... God created turbochargers!

Have done it a thousand times with no problems at all.weld might suffer accelerated corrosion and breakdown at the edge of the weld due to electrlytic corrosion but wont be anything significant.If you want to do it on a regular basis use a grade 347 stainless wire as its main purpose is for welding ferrous and non ferrous metals.

i had this problem recently!
my maniflow downpipe is exactly the same size as my play mini link pipe. so i went to my local exhaust place and got a section of stainless tube to sleve over the downpipe and the link pipe.
works a treat!

““A turbo: exhaust gasses go into the turbocharger and spin it, witchcraft happens and you go faster.”” - Jeremy Clarkson