: So Where Does the Extra 25hp Come From?? (Touring Models)



Chuck C
03-07-03, 01:33 AM
??

Devil_concours
03-07-03, 02:03 AM
more aggressive cam

Katshot
03-07-03, 08:47 AM
Cam profiles, engine tuning, and gearing are the main differences between the two models.

jadcock
03-07-03, 02:11 PM
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).

Katshot
03-07-03, 03:06 PM
I'm NOT saying a word Jason :canttalk:

jadcock
03-07-03, 03:17 PM
'Bout what sir?

Katshot
03-07-03, 07:27 PM
'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 ;)

jadcock
03-07-03, 09:22 PM
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. ;)

Chuck C
03-08-03, 01:27 AM
thanks to all for the great answers!

BeelzeBob
03-09-03, 01:44 AM
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...

Gearheaad43
12-02-06, 12:06 PM
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......

JimHare
12-02-06, 12:50 PM
But that's just it - they're not exactly alike - different cams, different PCM, different transmission gearing.

Gearheaad43
12-02-06, 01:03 PM
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...

eldorado1
12-02-06, 03:28 PM
Holy resurrection!

clarkz71
12-02-06, 04:04 PM
Holy resurrection!

Yes Robin, .... to the Batcave!!

danbuc
12-02-06, 05:19 PM
Haha...I just noticed it myself....3 YEARS!!! Damn, I think that's gotta be a record or something. I've seen 1 or even 2 years around here but 3...:helpless:

AlBundy
12-02-06, 10:35 PM
Its still cool, it might temp other members to check out the archives for more informative info.

dp102288
12-02-06, 10:39 PM
Not just 3, but 3.5 years! Holy fishpaste!

codewize
12-03-06, 11:44 AM
Katshot? Is that you? It's been so long I didn't even know you were on this board LOL. Hows my baby?

zonie77
12-03-06, 12:55 PM
This question has been asked...on fresh threads... that I'm amazed it popped up in a 3yr old one.:horse: :horse:

EcSTSatic
12-05-06, 09:14 AM
"He who asks a question is a fool for five minutes; he who does not ask a question remains a fool forever." - Chinese proverb.

dp102288
12-06-06, 09:25 AM
^^ Good one but "The guy who asks too many questions in class gets beat up in the parking lot" -school ethics. :D

K STS
05-20-09, 05:02 PM
One more time!

bigdad2201
05-23-09, 05:07 PM
just wondering witch is the Touring Model vin Y of 9 ??

Submariner409
05-23-09, 06:18 PM
Well, lesseee......If STS used to stand for Seville Touring Sedan and DTS used to stand for DeVille Touring Sedan, then I guess the VIN 9's are Touring Sedans.

ga_etc
05-25-09, 06:44 AM
Do you have a permanent red spot on your forehead from beating your head against your computer desk sub? lol

Aron9000
05-25-09, 07:16 AM
Just for reference, this thread is so old they were still making brand new Sevilles when the OP started this thread:banghead:

C0RSA1R
05-27-09, 01:51 AM
So Where Does the Extra 25hp Come From?? (Touring Models)

The little "T" in the badge on the back.