Custom exhaust manifold

[5e colin]

bump marco

 

[MarcoGTTurbo]

Just trying to get all the parts together before I start.

Just a quick question before I start - I bought the below manifold gasket and took that to the machine shop so they could cut it out of 13mm steel, my Q is - does it matter that the stock manifold is a different shape?



Im just wondering if the stock manifold is the shape it is to miss something on the head?

just checking

 

[Skalabala]

I can only think of: It needs space so that it can be easily be removed by not struggling to loosen bolts.
And be careful of the oil filter.
And remember to strap the manifold while in fabrication

 

[MarcoGTTurbo]

Thanks Skalabala, my mani flange will be identical to that gasket but 13mm thick.

Just marked up some 10mm plate for the CT9 flange. Ive got the measurements if anyone needs them



Cheers

 

[5e colin]

no just smal as possible for weight reduction and restrickt flow ( i probly mis understood the question ) you dont knead to be in the oem position but if you go away from that then bottom exhaust extension will be kneaded and oil feed/return adjustment

 

[MarcoGTTurbo]

Just a bit of an update

SO.............I did have the angle right



My collectors are cut and cleaned with a file and look pretty good







At this point theres no rush in getting everything together. Just as long as its right

I will be boring a hole in the side for a external wastegate. But here it is before I weld it



heres a stupid angle shot





Colin - the magic angle is 15 degrees

 

[5e colin]

nice 1 marco looks way more round at the bottom unlike mine did and they are waaay shorter to

do you mind cutting me 4 and posting them when you finished the setup

 

[Skalabala]

That is great craftsmanship bud
You are "practicing" "practising" TIG there I see
My English is pathetic

 

[bongskag]

looks really tight, nice work

theres a book called "Maximum-Boost-Designing,-Testing-and-Installing-Turbocharged-Systems by Corky-Bell" I found it a great read , very in depth and explains most of the theory behind it all.

 

[MarcoGTTurbo]

Colin - once ive corrected my jig and got it spot on, Ill gladly make you a set

Skalabala - Yeah trying to get my qualification in welding using this as part of my evidence

Bongskag - Thatsuseful. Going to have a look into that book

Mods - If you want to move this thread over into member showcase to stop if clogging up the helpful section that would be great

Thanks all - Ill keep us posted

Mark