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Bonneville GXP/ Northstar Powered Cars Discuss your Bonneville GXP and/or any other Northstar powered Olds or Cadillac... Including the 3.5L Twin Cam V6 (Short Star ) 4.0L and 4.6L Northstar V8's. Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 01-20-2007, 11:24 PM   #1
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what trans ael is behind the caddy v8 in the gxp. i just found one for my grtand mother and jus loed the v8. also is anyone building them up. i am looking at a ls2 swap so it wil be another 125 hp/tq right off the bat
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Old 01-20-2007, 11:34 PM   #2
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4T80-E

Just a little bit of info. The 4T80-E has alot of torque management, its numbers may be above a Series 2 3800 Supercharged (L67), but it actually does worse as far as actual track numbers go. If you are into modding and really want to go fast with a bonneville, you are best off with an SSEi. With the help of Intense, you can exceed the power of an LS2 and a Northstar with EASE.

In short, the Cadillac Northstar is a good engine for cruising, and has VERY good top end, the 3800 on the other hand has insane low end power, therefore making VERY quick track runs easy as pie.

There is close to no aftermarket for a northstar as well.

Some other blown members will further educate you on this matter, but, personally I recommend the 3800 for modding. It also has iron block and heads which gives you the peace of mind of not stripping out anything when rebuilding.
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Old 01-21-2007, 01:50 AM   #3
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Please don't post performance or general questions in the Mechanical sections of the Forum.

Please also make an effort to use a spell-checker so people are more likely to bother responding to your posts.
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