im in the process of getting a JDM sti which has a twin scroll turbo, i already have a 20g turbo and im unsure as to wether or not i should fit it to the next car ??? i will get my new car mapped and i will bolt other parts on to it, but is there another turbo i should consider or should i stick with the twin scroll

 

Steve,

i would stick with the 20G and a regular uppipe.
The JDM twinscroll would be the VF37 which is goed for 350 bhp ?

 

Nice one Steve. IIRC you may also have a VF38/39. I did see a thread somewhere with a twinscroll exhaust housing mated to a larger compressor - best of both worlds!

Slooby or Simon_ will no doubt know about it.

F

 

PE1825 is a compressor upgrade. I'm sure various companies can do cheaper versions. GT32 would be nice I think if you could adapt the twin scroll uppipe to fit the Garrett flange, not sure if there are any kits.

Litchfield obviously have something for the T25 - they might sell you one?

 

i have never seen the flange on the twin scroll up pipe!! but couldn't an exhaust manufacturer just take the flange off and weld it to a different up pipe ???

 

IIRC the twin scroll up pipe is in fact 2 up pipes...

John has reminded me of the PE thingy, which is the one i was thinking of.

Speak to Andy (fuzz) re converstion but I'd guess it's exclusive to Litchfield for business reasons.

F

 

if i got the compressor upgrade done would it drive ok wuntil a remap ???

 

twin scroll is indeed a two piped up pipe.

Garrett turbos (non twin scroll) can be made to fit with a modified "two into one" up pipe.

Whether my prototype can withstand some abuse we will soon see as it's only made of mild steel.. (1515 deg C melting point)
Once tested if there is a market for something that works (might not) it may be able to be made into a production run... who knows.

Andy