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Legacy twin scroll vs sti twinscroll


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I am planning a twinscroll conversion on my single turbo gtb, I picked up a blown up bp/bl motor for next to nothing.. is it worth getting the sti twinscroll headers with the lager diameter because I am planning an aftermarket turbo like a tdo5-20g or similar  .. or will the smaller diameter legacy headers perform fine?

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1 hour ago, broku420gtb said:

For the turbo you mean? Planning on using some sort of Adapter to either a different twinscroll flange or somehow getting the uppipe modified... 

 

Are you planning on big power? If youre going for the twinscroll thing cut straight to a holset. 

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I'm currently at 200kw I'm wanting to get to around the 240-250 range no higher because I'm running a factory v7 sti bottom

end and I hear rods don't like it over 250kw.. the thing is I want to try stay v7 sti topmount ... already have fuel pump injectors link Etc.. I was thinking some sort of holset or garret

15 hours ago, evowrx said:

 

Are you planning on big power? If youre going for the twinscroll thing cut straight to a holset. 

. don't know lol

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^ This. Do this. 

 

Forget about Top mounts, they're a waste of time. You get more reliable, consistent cooling from a Front mount. 

 

Also Holsets are awesome with a small ID header. Which I can prove later tonight as @Furze and I are down at D-Tech atm getting a Version 7 STi factory long block with BL/BP headers and a Holset HRC35/2 tuned. We've already passed 250kw at a guess at 21psi. Hoping for 300kw Dyno power run but safe around 280-290 :)

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55 minutes ago, evowrx said:

Get a fmic and a HRC35/2. Have a read of my holset how to it may seem a little daunting but not too bad if you know someone whos not a S*** welder.

I do happen to know a welder who's not S*** lol can you link me it can't seem to find it 

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On 06/04/2017 at 2:00 PM, broku420gtb said:

I'm currently at 200kw I'm wanting to get to around the 240-250 range no higher because I'm running a factory v7 sti bottom

end and I hear rods don't like it over 250kw.. the thing is I want to try stay v7 sti topmount ... already have fuel pump injectors link Etc.. I was thinking some sort of holset or garret

. don't know lol

 

I've been running 268wkw on a V7 STI bottom end for a little over 3 years now, it's happy as.

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