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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 02-28-2004, 11:24 PM   #11
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sts has 300hp. ive said this maybe 39 times. the GXP got the better engine, the 275hp engine is more powerful than the 300hp one. don't just look at the peak numbers, the SLS would be faster than the STS if the SLS had the STS gearing, the gxp has the sls engine, sts gearing, best of both worlds.

horsepower sells cars
torque wins races

the 275hp version is all about the torque, it makes more power lower than the sts all the way through the range untill it gets in the very high rpms, the 275hp tapers off, the sts keeps going a little higher. give the 275hp one slightly lower shift points, it will outperform if everything else is equal.
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Old 02-28-2004, 11:36 PM   #12
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Let'* still add the 320hp the XLR has!!! Along with all the goodies of the GXP!!!!

Maximum I/O
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Old 02-29-2004, 12:30 AM   #13
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hp is made from the ammount of torque produced, rpm and another numbers in there too..
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Old 02-29-2004, 03:57 PM   #14
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torque is the actual power to spin the tires, horsepower is a equation of torque and rpm. the point i was trying to make, even though one engine is rated for 25 more hp, the other engine is stronger and faster all other things being equal
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Old 03-01-2004, 02:47 PM   #15
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Here'* what you guys need....

(Torque x RPM)/ 5250 = HP

Because of this Torque will always be lower then HP below 5250 RPMS, The same @ 5250 RPMS and always lower then HP @ 5250 RPMS.

Let'* compare 3800'* for example... (peak torque is rounded slightly due to non matching data)

L27:
  • 170 HP
    225 lb Ft @ 3000 RPM
L36:
  • 205 HP
    230 lb Ft @ 5000 RPM

Notice how the L36 got 35 more HP! WOW you might say, i'd much rather have that engine. But it'* only got 5 more ft/lb? The peak torque is higher up, and the ensuing torque drop off will be further up then on the L27.

However, the L27 will have more power down low, which is nice for launches, and around town. IE: it'll make the car"lurch" more at signs. The L36 will have a little more kick after say 4000 RPMS though.

This is how a little 4 cyl honda with 153 lb ft of torque has 265 HP. It spins to 9000rpm easy!
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Old 03-01-2004, 04:55 PM   #16
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Old 03-01-2004, 06:28 PM   #17
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XLR is the first production RWD northstar... GXP is FWD so that will give you a difference. More power you have with FWD the more torque steer you will feel.


BTW with this talk of GTO, our local dealership just got a GTO in I want to drive it, but I think it is a stick... and unfortunatly I don't think they would let me learn in a 33k car!
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Old 03-01-2004, 10:49 PM   #18
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Isn't the GXP rear wheel drive? Or is that just wishful thinking!
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Old 03-02-2004, 12:25 AM   #19
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Nope your just dreaming....
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Old 04-02-2004, 12:42 AM   #20
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Default HP and Torque

Simply put, torque is the blast off and hp is the pull once you've started going. The STS engine is more powerful than the SLS engine. (STS 300hp/295-300lbs torque, SLS-275/290) The GXP is geared to get 300lbs of torque but imagine what could've been tweaked out of the 300hp engine. Just look at the Mercury Marauder. Once again GM conspiracy! The STS is gone on to better things so why not put its old in the Bonneville'* new. The SLS still has the better overall luxury package that will still sell for $46,000 MSRP.
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