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Twin scroll on 2.5 hawk STi

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Old 23 March 2014, 10:44 AM
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scoobyboy1
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Default Twin scroll on 2.5 hawk STi

Has anyone done this conversion to there UK hawk STi?? My mate has a JDM hawk and I love the spool of the twin scroll(not to mention the sound) But I also love the torque of the 2.5 engine from the UK hawk and that any gear can pull the car along.

Now if I could have the twin scroll set up on a 2.5, what would be needed for this conversion?? Would also love to hear anyone who has done this conversion, and how you rate it/worth doing???
Old 23 March 2014, 10:56 AM
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scooby2.5maz
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You've got the sump already john, think its headers, uppipe ,turbo ! Might have missed something ?
Old 23 March 2014, 11:15 AM
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Legacyb4-Dan
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And downpipe
Old 23 March 2014, 11:29 AM
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LUCKO
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most importantly you need your own bank card and pin number

good luck with trying to get that from your bride to be John, pmsl
Old 23 March 2014, 11:39 AM
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fpan
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LOL at Lucko. Just put a 2.0 twin scroll engine straight in and enjoy.
The problem is where to find one.
Old 23 March 2014, 12:39 PM
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joe v3sti
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I'd be focusing on forging the 2.5 first
Old 23 March 2014, 12:44 PM
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scooby2.5maz
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I'm running a 2.5 Sti (495 bhp and 470 torque ) with no engine issues
Old 23 March 2014, 02:12 PM
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t999cuk
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Interested in this myself after converting my bug to a twinscroll back in the day and already missing the sound more than anything.

I'm sure I remember seeing a blob eye on here at some point with a sc46 twinscroll madhammer's maybe??

my hawk is already forged think twinscroll sc42 would make a very impressive road car.
Old 23 March 2014, 02:26 PM
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scoobyboy1
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Originally Posted by LUCKO
most importantly you need your own bank card and pin number

good luck with trying to get that from your bride to be John, pmsl


defo need a secret stash!!!!
Old 23 March 2014, 09:28 PM
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LUCKO
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trust me
Old 23 March 2014, 10:01 PM
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maydew
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Originally Posted by LUCKO
most importantly you need your own bank card and pin number

good luck with trying to get that from your bride to be John, pmsl

lmao
Old 23 March 2014, 10:20 PM
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LUCKO
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dreamers will dream lol
Old 23 March 2014, 10:46 PM
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TimH
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When I had my forged 2.5 built, I ran standard the JDM VF37 for a while before I fitted my LM480.

It spooled well, and produce about 380bhp, but completely ran out of "puff" on the 2.5.

I'll try and find some graphs if relevant/interested?
Old 24 March 2014, 05:48 PM
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Originally Posted by TimH
When I had my forged 2.5 built, I ran standard the JDM VF37 for a while before I fitted my LM480.

It spooled well, and produce about 380bhp, but completely ran out of "puff" on the 2.5.

I'll try and find some graphs if relevant/interested?
Yeah Id be interested in seeing some graphs!!
Old 24 March 2014, 05:50 PM
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Tidgy
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why bother twin scrolling it?




single scroll turbo

Last edited by Tidgy; 24 March 2014 at 05:52 PM.
Old 24 March 2014, 05:55 PM
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smiffywhu
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Flat as my mrs chest
Old 24 March 2014, 05:59 PM
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Originally Posted by smiffywhu
Flat as my mrs chest

haha, yeah it is a tad, got plenty more top end wise. Its still running standard wrx headers as well so even more to come lol
Old 24 March 2014, 06:00 PM
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Originally Posted by LUCKO
dreamers will dream lol


Next time your round my house, Im telling the missus its your fault I keep modding the car!!!
Old 24 March 2014, 07:01 PM
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You've got more power than me Tidgy,glad you didn't take offence
Old 24 March 2014, 08:01 PM
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Tidgy
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Originally Posted by smiffywhu
You've got more power than me Tidgy,glad you didn't take offence
well the boost profile is hahahahaha

thats at the wheels by the way, just shy of 390 at the fly hahah

Old 24 March 2014, 08:25 PM
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This is a twinscroll turbo on a 2.1...... imagine what it would do on a 2.5.



250ftlb @ 3k
420ftlb @ 3.5k
540ftlb @ 4k

A 2.5 would probably smash the diff and box to pieces, with the extra torque and spool up.

Last edited by Shaun; 24 March 2014 at 08:26 PM.
Old 24 March 2014, 08:30 PM
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Originally Posted by Shaun
This is a twinscroll turbo on a 2.1...... imagine what it would do on a 2.5.
This (different turbo I believe):

Old 24 March 2014, 08:43 PM
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This is the 2.5 on a VF37, but can't find the boost plot yet:

Old 24 March 2014, 08:57 PM
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Tidgy
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man vf37 just does not work on a 2.5 does it lol
Old 24 March 2014, 08:59 PM
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Originally Posted by Tidgy
man vf37 just does not work on a 2.5 does it lol
LOL - nope!! Just could not pass the exhaust gases the 2.5 produced, so totally restricted the flow. Was only ever a stop-gap while the engine was run in and I save up a bit more to buy the LM480
Old 24 March 2014, 09:05 PM
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Originally Posted by TimH
This (different turbo I believe):[/IMG][/URL]
I meant John's set-up on a 2.5.... not your lag-a-tron (in comparison).
Old 24 March 2014, 09:07 PM
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Tidgy
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Originally Posted by Shaun
I meant John's set-up on a 2.5.... not your lag-a-tron (in comparison).

lag a tron :l ol1:
Old 24 March 2014, 09:08 PM
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LOL!! What turbo is John's running?
Old 24 March 2014, 09:12 PM
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me?
Old 24 March 2014, 09:12 PM
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Originally Posted by Shaun
This is a twinscroll turbo on a 2.1...... imagine what it would do on a 2.5.

250ftlb @ 3k
420ftlb @ 3.5k
540ftlb @ 4k

A 2.5 would probably smash the diff and box to pieces, with the extra torque and spool up.
Which turbo is this???


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