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GrimmSpeed Install without tune?

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Old Dec 21, 2012 | 04:10 PM
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ErnGotti's Avatar
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GrimmSpeed Install without tune?

I have an AP Intake, CNT catless turboback, ACT HD & Streetlite, and DepoRacing UICP installed. Factory 2008 Tune. I also have in the garage a 3.5" DepoRacing FMIC and LICP, ID1000s, GSC S2 Cams and titanium valvesprings, and a GrimmSpeed EBC. I wanna install everything in the springtime when I get tuned but for now I wanna put the EBC on to maintain the peak boost levels but am I doing more harm than good with that? Or will it be safe? Please let me know. Thanks!
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Old Dec 21, 2012 | 04:30 PM
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Originally Posted by ErnGotti
I have an AP Intake, CNT catless turboback, ACT HD & Streetlite, and DepoRacing UICP installed. Factory 2008 Tune. I also have in the garage a 3.5" DepoRacing FMIC and LICP, ID1000s, GSC S2 Cams and titanium valvesprings, and a GrimmSpeed EBC. I wanna install everything in the springtime when I get tuned but for now I wanna put the EBC on to maintain the peak boost levels but am I doing more harm than good with that? Or will it be safe? Please let me know. Thanks!

beta cobb maps are back out. i'd wait and get a pro-tune with everything. no sense in rushing at this point. tune is NEEDED!
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Old Dec 21, 2012 | 05:46 PM
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you need a tune!
Taken from their site

The GrimmSpeed™ Mitsubishi EVO Boost Control Solenoid is designed to work with your factory computer (requires tuning). It will not reduce the life of your factory computer because it is designed to draw the same ammount of power as the factory BCS but flows better and reacts faster. It plugs in and requires no splicing or soldering of resistors. With the included bracket you can bolt it in, plug in the connector, and start tuning for fast boost response, increased boost pressure and free up lots of power. Planning on returning the car to stock? Just reverse installation.
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Old Dec 22, 2012 | 08:24 AM
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Thanks!!
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Old Dec 23, 2012 | 12:04 PM
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Without a retune and the grimmspeed you will over boost like crazy and hit ecu based limiters.

Last edited by R18eclipse; Dec 24, 2012 at 02:37 PM.
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Old Dec 23, 2012 | 11:32 PM
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Could the GrimSpeed boost controller be installed and then drive the car to a tuner?
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Old Dec 23, 2012 | 11:40 PM
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Yea as long as you stay out of boost. It's an easy install though. why not just install it there? Or if you do hook it up just run a vacuum line from the compressor to the waste gate.
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Old Dec 24, 2012 | 11:53 AM
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I had driven my car with the GS 3port installed for 2 weeks before my tune and had no issues. It can and will overboost so be easy with the gas. As well as the boost will come up ALOT faster. I ended up going into my rom and setting the WGDC to 0 so it cut the boost off at 20psi.

So in a short answer, can you drive with it installed without a tune? Yes, if you dont go WOT.
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Old Dec 24, 2012 | 11:32 PM
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Originally Posted by Snakes709
I had driven my car with the GS 3port installed for 2 weeks before my tune and had no issues. It can and will overboost so be easy with the gas. As well as the boost will come up ALOT faster. I ended up going into my rom and setting the WGDC to 0 so it cut the boost off at 20psi.

So in a short answer, can you drive with it installed without a tune? Yes, if you dont go WOT.

Thank you That's what I needed to know!
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Old Dec 25, 2012 | 11:44 AM
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Originally Posted by MadBoostedEvo
Thank you That's what I needed to know!
Dude come on.

Sure he answered the question as literally as possible. But is driving your Evo w/ 3port attached without a tune suitable? No. I can use a chainsaw to open a beer bottle but how smart is that? It's your car. Your money. Your time. But I'd re-think installing without a tune. Even the 'Snake709' admitted to tuning by limiting his boost to 20 PSI (even if it was a **** poor method).

Why would you buy a 30-40K car to only screw it up?
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Old Dec 25, 2012 | 12:04 PM
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You can drive the car all day, just don't go WOT, who knows what the boost will be set too. Could be 50psi for all we know.
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