Wondering how many miles were on it?? We've all witnessed how the gains after break-in on a normal Ecotec seem to be more than other engines. Wonder if the same applies and if so what the new numbers might be?
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VIN 2103 Loaded Sly with tan & grey, picked up on Winter Solstice (12-21-05)
You’re also probably aware that the Red Line version gets a limited-slip differential, a performance-tuned suspension, and dual exhausts.
But forget all that. The most interesting thing about the swiftest Sky is without question its engine. And this isn’t some half-assed, hobbled-together, turbocharged old lump we’re talking about. Need proof of the new-think? Saturn fills the thing with Mobil 1 synthetic motor oil at the factory.
This state-of-the-art, turbocharged and intercooled, sixteen-valve in-line four is GM’s first direct-injection engine in the US, and it’s been renforced to better handle the turbo’s 20 psi. The powerplant also has the highest output--and the highest specific output--of any engine in the Ecotec family: 260 hp and 260 lb-ft of torque. That’s a lot of power for a 2.0-liter engine.
By injecting fuel directly into the cylinders, GM was able to maintain a relatively high compression ratio (9.2:1), which helps the engine make more power off-boost and also contributes to better overall efficiency. Continuous cam phasing on both the intake and exhaust cams further increases efficiency and helps reduce turbo lag. For example, at low revs, the engine computer will allow a small amount of valve overlap, opening both the intake and exhaust valves at the same time. This increases the volume of gases flowing through the turbo, keeping it spooled up and ready to produce boost.
To wit: Mash the accelerator from idle and the twin-scroll turbo starts building boost almost immediately. All too often, having a turbo small enough to spool up quickly at lower revs means that it runs out of breath as the tach needle hits the fun end of the spectrum. But that’s simply not the case with the Sky Red Line. The 6300-rpm fuel cutoff might be relatively low, but the little motor pulls hard all the way to the top, and all the techno goodies work together to make the displacement-challenged Red Line drive more like a normally-aspirated car with a big, honking motor.
We were impressed with the Red Line’s ability to make power all over the rev range, but why should you take our word for it? We took it to a chassis dyno so you can see exactly what it puts out. And the Sky’s rough and tough exhaust note made everyone turn around and listen. So, naturally, we grabbed the video cameras, and you can hear it for yourself.
On the dyno, the Saturn Sky Red Line put 228 hp and 248 lb-ft of torque to the rear wheels. Those are very, very impressive numbers. The peak torque number is quite a bit higher than we expected, but more impressive still is the shape of the torque curve. This little monster put down more than 200 lb-ft of torque from 2000 rpm to almost 6000 rpm.
The Ecotec isn’t a particularly smooth or refined engine, but the dyno run backed up our impression that it provides truly world-class power delivery. The next time you see someone driving a Sky Red Line or its mechanical cousin, the Pontiac Solstice GXP, you’ll know that their ear-to-ear grin isn’t just due to their car’s gorgeous looks.
Very impressive, and a great almost flat torque curve. UNtil some blip at about 5200 rpm. Assuming that the engine in this car actually puts out 260 bhp then this is also an impressive low 12.3% drivetrain loss from engine to rwhp.
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When more than one friend wants to ride shotgun
No, I do not work for GM or any subsidiary or supplier.
Location: Rosamond, CA - Home of Willow Springs Raceway
Quote:
Originally Posted by SlyFly
What am I missing? It states 248 rwt but the red line never crosses 225?
Look on the other side of the graph.
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2007 Cool GXP with Darkside Top, 5 spd, Ebony Cloth, Monsoon with Single CD, Sport Pedals, XM, A/C
Mods - Solo Street/Race Exhaust, K&N Drop-in Air Filter, EDAL
__________________ Aggressive GXP at $25,995.00 shipping of $600, Manual Transmission.
Options:
Air, $960; Chrome Wheels, $545; PCQ, Premium Package (Leather), $525; Radio, 6-Disc with MP3, $495; Monsoon, $395; Premium Acoustic Headliner, $150; and Sport Metallic Pedals, $115; all totals $29,180.00. No XM/OnStar and NO Spoiler. MODS (RKSport/Magnaflow dual exit exhaust system, K&N filter, Ventureshield.
First 1000. Aggressive with everything, NO XM/OnStar. SOLD
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Founding member
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You're using the base cars ~20% loss to calculate that correct?
I've noticed a lot of times when the NA vs the forced induction version are compared the % loss is not necessarily the same. The Miata vs MSM for example had a very similar 20% loss on the NA and like a 15% loss on the FI version. Some chalk it up to being "over rated" but I'm more inclined to believe it's a mix over over rating and mainly better efficiency in these types of engines.
Now the toque of this engine, 248 ft-lbs if the value was true that would mean only a 4.6% drive train loss which is definitely not true. If we used the 12.3% loss of the 228 vs 260 if that's to be believed it means the engine would be making like 280 ft-lbs of torque.
__________________ Aggressive GXP at $25,995.00 shipping of $600, Manual Transmission.
Options:
Air, $960; Chrome Wheels, $545; PCQ, Premium Package (Leather), $525; Radio, 6-Disc with MP3, $495; Monsoon, $395; Premium Acoustic Headliner, $150; and Sport Metallic Pedals, $115; all totals $29,180.00. No XM/OnStar and NO Spoiler. MODS (RKSport/Magnaflow dual exit exhaust system, K&N filter, Ventureshield.
First 1000. Aggressive with everything, NO XM/OnStar. SOLD
~~~~~~~ NASSOA
Founding member
~~~~~~~
Last edited by LatinVenom : 09-15-2006 at 01:09 PM.
Team Solstice 2008 HOT SHOT Aggressive 2007 GXP Auto-minus On*Star, spoiler, and smokers pkg. Delivered December 4, 2006
Ave mixed driving 26 mpg
2 failed pinion seals...300+ miles, and 9,700+ miles...and one more under recall at 12,636 miles for a grand total of 3!
Driver's outside door handle came apart in May 2008...repaired June 2008
Canvas top replaced June 2008.
Gas cap replaced.
All r
Dyno numbers for RL
if the value was true that would mean only a 4.6% drive train loss which is definitely not true. If we used the 12.3% loss of the 228 vs 260 if that's to be believed it means the engine would be making like 280 ft-lbs of torque.