| Northstar Performance and Technical Discussion Performance discussions relating to the Northstar System (intake, exhaust, cam, etc.). | Cadillac Forums: So Where Does the Extra 25hp Come From?? (Touring Models) 
03-07-03, 01:33 AM
|  | Cadillac Owners Connoisseur  | | Join Date: Jan 2003 Location: NE Ohio | | | So Where Does the Extra 25hp Come From?? (Touring Models)
?? |
03-07-03, 02:03 AM
| | Cadillac Owners Connoisseur | | Join Date: Jan 2003 Location: Alexandria, VA Age: 27 | | | more aggressive cam |
03-07-03, 08:47 AM
|  | Cadillac Owners Master | | Join Date: Jan 2003 Location: Newtown, PA Age: 50 | | | Cam profiles, engine tuning, and gearing are the main differences between the two models. |
03-07-03, 02:11 PM
|  | Cadillac Owners Connoisseur Cadillac(s): White Diamond 2001 STS | | Join Date: Jan 2003 Location: North Carolina Age: 30 | | | The extra 25 horsepower comes from additional lift and duration on the intake camshaft, and the necessary fuel mapping programming differences to accompany it. That's it. All other equipment on the engine is exactly the same. Early Northstars (like 1993-1995 engines) had stiffer valve springs on the Touring models, but starting in 1996-1997, all Northstars were equipped with the stiffer springs, so that difference went away.
Increased performance is due to the extra horsepower and the shorter gearing (the Touring models have 3.71:1 final gearing and the "base" models have 3.11:1 final gearing). |
03-07-03, 03:06 PM
| | Cadillac Owners Master | | Join Date: Jan 2003 Location: Newtown, PA Age: 50 | | I'm NOT saying a word Jason  |
03-07-03, 03:17 PM
| | Cadillac Owners Connoisseur Cadillac(s): White Diamond 2001 STS | | Join Date: Jan 2003 Location: North Carolina Age: 30 | | | 'Bout what sir? |
03-07-03, 07:27 PM
| | Cadillac Owners Master | | Join Date: Jan 2003 Location: Newtown, PA Age: 50 | | 'Bout how the "performance" is REALLY from the gearing and not the slightly higher HP rating.
I didn't want to start up that last "discussion" we had again  |
03-07-03, 09:22 PM
| | Cadillac Owners Connoisseur Cadillac(s): White Diamond 2001 STS | | Join Date: Jan 2003 Location: North Carolina Age: 30 | | Well, the question was where does the HP come from. That comes from the camshaft differences and the necessary programming. Assuming he may have also been asking why the Touring models are faster, I wanted to mention the differences in gearing, because they all play a part in the final outcome. |
03-08-03, 01:27 AM
| | Cadillac Owners Connoisseur | | Join Date: Jan 2003 Location: NE Ohio | | | thanks to all for the great answers! |
03-09-03, 01:44 AM
|  | I'm a Cadillac Fanatic! | | Join Date: Dec 2002 Location: Fort Lauderdale, Florida Age: 45 | | | Since this is such a popular topic, would someone care to write up a small article for me to post up on the site? It doesn't need to be just one person, either.. I'd just like something set for easy reference.. Maybe even for a "most frequently asked questions" forum... |
12-02-06, 12:06 PM
|  | Cadillac Owners Enthusiast Cadillac(s): 1997 Polo Green Cadillac Seville STS | | Join Date: Nov 2006 Location: Georgia | | | Re: So Where Does the Extra 25hp Come From?? (Touring Models)
Huh?.... Then WHY did GM give the SLS's a different Engine VIN as opposed to the STS??? If the engines are completely alike...? That makes no sense what so ever...... |
12-02-06, 12:50 PM
|  | Cadillac Owners Connoisseur Cadillac(s): 01 Eldo ETC, 02 Deville | | Join Date: May 2004 Location: Salem, NJ Age: 56 | | | Re: So Where Does the Extra 25hp Come From?? (Touring Models)
But that's just it - they're not exactly alike - different cams, different PCM, different transmission gearing.
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12-02-06, 01:03 PM
| | Cadillac Owners Enthusiast Cadillac(s): 1997 Polo Green Cadillac Seville STS | | Join Date: Nov 2006 Location: Georgia | | | Re: So Where Does the Extra 25hp Come From?? (Touring Models)
Quote:
Originally Posted by JimHare  But that's just it - they're not exactly alike - different cams, different PCM, different transmission gearing. | Ahh ok Different cams.. I can see why they would give it a different number based on JUST the cams... |
12-02-06, 03:28 PM
| | Cadillac Owners Connoisseur | | Join Date: Feb 2004 Location: FL | | | Re: So Where Does the Extra 25hp Come From?? (Touring Models)
Holy resurrection! |
12-02-06, 04:04 PM
|  | Cadillac Owners Connoisseur Cadillac(s): 1994 Mercedes E420 / 1995 Eldorado/ 2006 Yamaha R1 LE | | Join Date: Mar 2006 Location: Clearwater Beach, Florida Age: 46 | | | Re: So Where Does the Extra 25hp Come From?? (Touring Models)
Quote:
Originally Posted by eldorado1 Holy resurrection! | Yes Robin, .... to the Batcave!! | | Cadillac Discussion Tools | | | 
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