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2012 GSR Round 4 EFR 8374 IWG 770WHP 540WTQ

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Old Jun 12, 2015, 03:25 PM
  #61  
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I was told to go for the 1.05 host side on the 7670 but what difference will 0.92 or 1.45 hot side on a 7670??? I'm looking for early spool street car.
I've got the MHI now but not really feeling that turbo feels slow!
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Old Jun 12, 2015, 03:53 PM
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the 1.05 and 1.45 use the external gate setup, so quite a bit different than the .92 A/R.

It's all a balance of spool/power. If you want more spool go .92 IWG, if you want biggest top end go 1.45 EWG or 1.05 EWG for something in between.
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Old Jun 12, 2015, 06:02 PM
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This is so impressive coming from a 2.0L
Amazing torque, spool, and powerband! Congrats
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Old Jun 13, 2015, 12:29 AM
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What does IWG & EWG mean??? Is one with Air Con & one without??? & is there pros & cons for each one?
Last edited by Realbaman; Jun 13, 2015 at 12:37 AM.
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Old Jun 14, 2015, 01:56 AM
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Originally Posted by black E
I agree 100%. The 8374 blew up on me, the exhaust wheel disintegrated to a million shards. The turbo really is a 700hp turbo but I pushed it to 770-800 and overspun it until it gave out.
I roll race/drag race so I wanted to stay in the same power range. The 9180 got me there within its efficiency range on a less aggressive tune.
This is the post I was expecting to see sooner or later. Awesome powerband though. Probably would have survived indefinitely if kept to 680 whp.
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Old Jun 14, 2015, 07:56 PM
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Originally Posted by Realbaman
What does IWG & EWG mean??? Is one with Air Con & one without??? & is there pros & cons for each one?
Internal and External Wastegate are what those stand for.

Internal advantages are usually it's more space efficient / cheaper. Externals offer better boost control, but cost more and generally take up more room and are more complex. Both can be vented to atmosphere or vented back into your exhaust, though IWG usually recirc back into the exhaust.. and EWGs usually vent to atmosphere (usually).
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Old Jun 14, 2015, 08:06 PM
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^ Funny thing is (with the EFR's at least) the IWG cost a few hundred more vs EWG

I guess by the time you add 2x gates and plumbing you're $400-500 worse off versus the IWG option anyways...
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Old Jun 29, 2015, 01:46 AM
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God I love these turbos, great numbers
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Old Jun 30, 2015, 03:03 AM
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Originally Posted by FossilAus
^ Funny thing is (with the EFR's at least) the IWG cost a few hundred more vs EWG

I guess by the time you add 2x gates and plumbing you're $400-500 worse off versus the IWG option anyways...
Ok but what's the better setup tho???
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Old Jul 13, 2015, 06:41 PM
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Very cool sorry if I missed it in the description, but who are you using to tune this?
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Old Jul 14, 2015, 09:52 AM
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The OP is tuning it to the best of my knowledge.
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Old Nov 29, 2015, 07:12 PM
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Your results have convinced me to go 8374/IWG, it looks awesome!
Did you ever attempt to tune with the included EBCS?
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Old Nov 30, 2015, 03:49 PM
  #73  
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Yes I did but I just prefer the MAC valve honestly. The Pierburg solenoid is to twitchy for my liking.
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Old Dec 3, 2015, 09:35 PM
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Looks like a real Monster..
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Old Jan 26, 2016, 01:49 PM
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that is some spoolage!! great power throughout the band!
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