Granby

iTrader: (5)

What would i need to fit a twin scroll turbo off a JDM spec car (VF37 i believe) onto a UK spec WRX if it's possible at all , i think the headers and up-pipe are different but would i need to change anything else (oil or water pipes - downpipe etc)

Cheers

Neilo

sump as well i think....they are a different shape because of the headers...

maybe downpipe fittings too but im not so sure on that one!

stevebt

iTrader: (8)

definately a new downpipe as well, and then you will need the JDM centre or a classic shape centre to fit onto the downpipe

Granby

iTrader: (5)

Anyone else

Neilo

that should be it Ian....headers, sump, uppipe downpipe and a VF37

Granby

iTrader: (5)

Well you never know there maybe someone out there that can make a uppipe to fit the twin scroll onto standard headers

harvey

iTrader: (48)

Hi Ian : I think it is one of these jobs that you start with all the bits you know you need and take it from there. Adapting a down pipe is not a problem and just a question of whether adapting your existing or use the purpose designed item whichever is most cost effective. I think you have to go with the twin scroll up-pipe and headers.
Oil and water pipes can be made up locally as/if required.
If you go ahead it is vitally important that you choose somebody with the range of skills and knowledge to carry out such a project. Try to tie down the timescale and budget as much as reasonbly possible, bearing in mind that you are probably in uncharted waters.

stevebt

iTrader: (8)

the expense it will cost to add one of these turbo's wont be worth it IMHO, the money would be better spent on another turbo more suited to your car !!!

Granby

iTrader: (5)

Thanks everyone , it was just a idea to see if i can get more torque out of my car

wrxcar

twinscroll fitting is quite a simple job i have done this to a 1994 wrx
you need the turbo,front pipe,headers, upipe and the oil sump
after a remap the car did 367bhp and 398lbflt of torque
it was a very fast road car if you need any more info please contact me by private message
classic exhaust center and rear section will be needed i would use a rcms front pipe

Granby

iTrader: (5)

Thanks very much for that, i didn't really want to change the sump as i have a large capacity sump fitted already, if i could get round this then i may give it a try

wrxcar

you may be able to do it as you can get the sumps modded to miss the headers i have seen this done but not on the oe spec twinscroll headers i think you may only have to take the heat shields off and wrap the headers in dei wrap to give the extra room and then have the sump slighted modded to fit round the headers let me look into this for you as a friend is coming down with a car i built for him and i will look at it closer pm me so i can post you a message back
cheers paul

stevebt

iTrader: (8)

suppose i dont come down

Granby

iTrader: (5)

Don't even think about it

Mother Theresa

Granby if you do end up having to lose your sump I know of a good home for it...

Granby

iTrader: (5)

i'll put you on the list then

stevebt

iTrader: (8)

granby

where abouts are you??? as i could take you for a spin in mine then you could see if twin scroll was the way you wanted to go ???

Granby

iTrader: (5)

London

stevebt

iTrader: (8)

oops a bit far !! next time im down there i wont have a twin scroll it will be a gt30r

but im at JAE if your about ??

Granby

iTrader: (5)

Typical i wont be at JAE as i'm going to the Rally Day
So what difference does the twin scroll make on everyday driving & when you give it some

stevebt

iTrader: (8)

IMHO i think you would be more suited to something like an 18g turbo !! it may even be quicker than mine and mine is a hybrid twin scroll !!!

definately a 20g running a bigger tmic will be fun !!! buy a good tmic though not an sti jobbie !!!

Granby

iTrader: (5)

Think a 18g would be easier in the end
Whats wrong with the STi TMIC

stevebt

iTrader: (8)

the STI tmic is too small for newage cars and bigger power, i have a hyperflow tmic on mine !!! if you were considering a twin scroll turbo !!! a bigger tmic and a 20g will seem cheap in comparison and as soon as 3500rpm hits it will pull

Hol

iTrader: (1)

I have to agree Ian.

A. Because I don't want local competition and
B. Because even im gonna find it hard to pass 400 without an expensive Twin Scroll hybrid.

I think the twin scroll has limits and power will come cheaper and easier with a traditional hybrid.

Your welcome to have a try of mine on one of the local private roads

Granby

iTrader: (5)

FPMSL

Hol

iTrader: (1)

Well, I dont!!


To be honest I have no idea what the remap has done, but I doubt it is now over 400, more likely 380-ish.

The FMIC and methanol have meant we could eke out some extra ignition advance and max the injectors at 95%.
But a higher flowing turbo is needed to make the most of it now as that is the limiting factor.
Prices are not cheap, and for half the price I could get a conventional bearinged Garett and rotated pipe. For the same price, I could get a roller- bearinged Garrett.

stevebt

iTrader: (8)

thats what mine max out at on my tmic !!! twin scroll aint what its cracked out to be !!

Hol

iTrader: (1)

Drivability --> faaaaaaaaaannnnnnnnttttttastic!

But I think we pay a price for the quick spool characteristics when you look for bigger numbers.




I hope we don't put anyone off? £ for £, they are still miles better than the standard STI8 set-up (VF35?).






The injectors would have gone over 95% too. But the cooler charge of the WI mix meant we could lean them off considerably over the STI TMIC.

Granby

iTrader: (5)

This is what i'm after as i have a VF34, i not after big bhp numbers but drivability with improved low down torque

stevebt

iTrader: (8)

speak for yourself !! i dont hit full boost till about 3800rpm but then off reading the webmasters thread about tuning , i think i have traded highend pickup for lowdown sppol by adding an imlet pipe !!! plus mine will spool later due to being a hybrid !!!