| Northstar Performance and Technical Discussion Performance discussions relating to the Northstar System (intake, exhaust, cam, etc.). | Cadillac Forums: Which PCM?? 
06-29-09, 08:36 PM
| | Cadillac Owners Member Cadillac(s): 2007 srx 1997 etc 1993 allante 1970 coupe deville 1979 t/a  | | | | | Re: Which PCM??
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06-29-09, 08:45 PM
| | Cadillac Owners Connoisseur Cadillac(s): Member of Air Fuel Tuning (Cadillac Division) | | Join Date: Apr 2007 Location: Inside The Northstar PCM Age: 41 | | | Re: Which PCM??
 
less power out of that 300HP engine |
06-29-09, 09:50 PM
|  | If it won't run, chrome it..... Cadillac(s): 2002 Cadillac F55 STS/53000mi., 2004 Ford F150 Super cab 4x4 | | Join Date: Feb 2006 Location: Maryland upper Eastern Shore Age: 69 | | | Re: Which PCM??
AJ, you are flat, categorically, absolutely wrong. "Power" is a relative term; Your footnote "Less power out of that 300 hp engine" totally disregards the use, application, gearing, and tuning of the two engines.
I know, and you know, that we can easily build an Olds 455, a GM 454 BigBlock, or a 327 SmallBlock to pull stumps and barns at low rpm/high torque, or we can build it to peak out at whatever rpm/gear it takes to cross the 1/4 at exactly max output in a specific vehicle.
The graphs and tables are cutesy and serve to stimulate the novice, but they are not practical in the real world.
(and it all depends on what year SAE graphs we want to pull out of the hat at any given moment: whatever currently supports our position........) |
06-30-09, 08:29 AM
| | Cadillac Owners Connoisseur Cadillac(s): Member of Air Fuel Tuning (Cadillac Division) | | Join Date: Apr 2007 Location: Inside The Northstar PCM Age: 41 | | | Re: Which PCM??
Quote:
Originally Posted by submariner409  AJ, you are flat, categorically, absolutely wrong. "Power" is a relative term; Your footnote "Less power out of that 300 hp engine" totally disregards the use, application, gearing, and tuning of the two engines.
| in my opinion and from every thing I have seen from GM the 275hp engine has more Torque and Horsepower below 4500 to 5000 rpm's The first chart is from a 1992 or 93 training manual. It is not SAE certified. The Pontiac's ran the 275hp engine and 3.71 gear and they were marketed as a performance car. |
06-30-09, 08:49 AM
| | If it won't run, chrome it..... Cadillac(s): 2002 Cadillac F55 STS/53000mi., 2004 Ford F150 Super cab 4x4 | | Join Date: Feb 2006 Location: Maryland upper Eastern Shore Age: 69 | | | Re: Which PCM??
Correct, because now we have an additional set of engine operating conditions which identify where one engine makes "more power".
Over about 4,500 - 4,750 the L37 gets "on the cam" and pulls stronger to redline than the LD8, so, yes, the two drivetrains are built to do different things as far as "power" and performance goes. Is/was there any weight difference between the Seville/Deville and the Pontiac model ? The 275hp/3.71 gear would be awesome in a car some 800 - 1,000 pounds lighter.
Unfortunately, even by today's supercharged Cadillac standards, neither engine is very "powerful". There's only so much you can do with FWD. Nuts ! | | Cadillac Discussion Tools | | | 
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