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 Post subject: supercarger question
PostPosted: Sun Feb 10, 2019 11:17 am 
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Joined: Sun Dec 24, 2017 6:05 am
Posts: 1
Year and Trim: 2005 sle
can I install supercharger from 02 to 05 non supercharged engine? I have whole car so I can change ecu if needed.

thanks gene


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 Post subject: Re: supercarger question
PostPosted: Sun Feb 10, 2019 5:30 pm 
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Joined: Mon May 10, 2010 6:11 pm
Posts: 9040
Location: Chicago, IL
Year and Trim: 2003 SLE
You will need to swap everything from the heads up on the NA block and get a custom tune because the non-supercharged engine has higher compression.

http://www.grandprixforums.com/3-8l-v6- ... -info.html

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"Penelope" - 2003 SLE - 185k Miles
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 Post subject: Re: supercarger question
PostPosted: Sun Feb 10, 2019 11:20 pm 
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Joined: Tue May 27, 2008 8:53 am
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Location: Las Cruces, NM
Year and Trim: 1993 Buick Park Avenue
1994 Buick Regal Custom
If you have the whole car, you may was well just drop the subframe with the drivetrain attached, and swap the whole thing. Not only is it a bit more work to fit a supercharger to a NA car, but, you would still be missing out on the strengthened internals of the engine, the proper cooling for the drive train, as well as the HD variant of the transmission, and the gearing that may go with it.

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1993 Buick Park Avenue - 197k - Some odds and ends done - Simply won't die
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1990 Oldsmobile 88 - Gone to a better place


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 Post subject: Re: supercarger question
PostPosted: Tue Feb 12, 2019 10:23 am 
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Certified Bonneville Nut
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Joined: Mon May 10, 2010 6:11 pm
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Location: Chicago, IL
Year and Trim: 2003 SLE
The Series 2 NA engines handle boost just fine, you just have to account for the higher compression ratio. In the 2000+ form there wasn't much of an upgrade for the cooling system, and the HD trans doesn't actually strengthen any of the known weak points of the transmission. And the NA gearing is better as well since it is shorter!

Plus you get to replace a bunch of gaskets and fluids if you do a top swap. It's actually very popular in the w-body world, especially in turbo applications, to go for the NA motor because of some of this stuff. Especially the higher compression.

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"Penelope" - 2003 SLE - 185k Miles
"Sydney" - 2000 Honda S2000 - 60k miles
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