Cadillac Owners Forum banner

1 - 9 of 9 Posts

·
Registered
Joined
·
5,630 Posts
Discussion Starter #1
This is a quick rundown of the improvements or changes the 3.6L HO received. As has been discussed, there might be some opportunities here for more easy performance mods. The changes to the exhuast cams and intake manifold look promising.

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Higher Output Application for 2007 Saturn Outlook
A new high-output version of the 3.6L V6 VVT powers the new Saturn Outlook crossover sport-utility vehicle. This engine is a transverse installation, matched with GM Powertrain’s new 6T75 Hydra-Matic six-speed automatic transmission and either front- or all-wheel drive.

The 3.6L V6 VVT HO generates more horsepower thanks to changes in the cylinder heads and induction system, increasing airflow through the engine. The intake ports have been reshaped to increase flow, and a new intake manifold features longer runners that reduce airflow restrictions. Finally, the exhaust cams have been re-profiled to speed the flow of exhaust gas out of the engine at wide-open throttle. Maximum lift does not change, but duration increases to keep the exhaust valves open a fraction longer. Preliminary figures indicate a horsepower increase of nearly six percent compared to the previous most powerful version of the 3.6L V6 VVT.

The higher output version retains the 3.6L V6 VVT’s sophisticated variable intake system. The aluminum intake manifold has a valve in its plenum, managed by the engine control module (ECM), which opens and closes according to engine speed. At idle, the valve is open. From just past idle to mid rpm, the valve closes and effectively creates two separate plenums, each feeding the intake runners and ports for half of the cylinders. This optimizes airflow at lower engine speeds to maximize low-end torque. At higher engine speeds, the plenum plate opens, creating a single, higher-volume plenum feeding all cylinders for freer breathing and high-rev horsepower. The variable intake manifold (VIM) allows optimal airflow for a given engine speed without the compromises of a fixed-volume plenum. In combination with cam phasing, it means impressively linear torque delivery.

This higher output version of the 3.6L V6 VVT features its own comprehensive acoustic package, with a full sound-dampening cover between the cam covers. The base Outlook will be equipped with single exhaust in both front- and all-wheel drive variants. All other vehicles built with the higher-output 3.6L V6 VVT will feature dual exhaust.
 

·
Registered
White '04 CTS 3.6L,Two JL 12w7 + Bose/ Boston Tweets
Joined
·
1,481 Posts
Id like to open the intake ports on the heads but how would I keep all the metal shavings away?
Cams sound nice,and that intake manifold sounds like a good idea, the fact that saturn is going out will make parts higher tho right? or cheaper? idk haha
But if i bought the manifold then Id prolly port that before I put it on.Concorso you got any price breakdowns available ?
 

·
Registered
Joined
·
5,630 Posts
Discussion Starter #3
Before buying the parts new from a GM dealer, Id be looking in a scrapyard for a wrecked SUV with this engine. This engine variation also came in the GMC Acadia and the Buick Enclave, and some of the changes might have shown up in other variations as well, like the Pontiac Torrent. I have been checking scrapyards for awhile, with no luck. When I get my VCoupe, Ill be trying to trade the CTS in for another 1st gen CTS in White Diamond with 6M trans for a DD, so Im not rushing to modify the CTS I have now...

Im thinking we might be able to find part#'s by searching on www.gmpartsdirect.com...they do sell all brands of GM parts. Its another option.
 

·
Registered
The Mighty Kael, 2004 Black CTS, Every Option
Joined
·
2,432 Posts
the motor it mounted tranversly, it is still the same motor, that does not mean that these mods are not bolt on.
the heads, cams and intake should all bolt right onto the standard cts engine.
 

·
Registered
06 Cadillac CTS 3.6L [Sold :( ] 02 Mustang GT 5Spd
Joined
·
1,161 Posts
Awesome! I would love to do this, anyone find a good source for the parts yet? I just wonder if all these fancy valves will work with the CTS's computer. not to sure on that
 

·
Registered
2007 CTS Thunder Gray
Joined
·
1,055 Posts
I had this engine in my outlook. I was not impressed, but the Outlook is a beefy lady. I'm sure it would perform much better in the CTS. Good to know that there is another engine option in case anyone needs it.
 
1 - 9 of 9 Posts
Top