This is our new record-holder for 2.0 Ecotec WHP on 93 Octane Pump Gas:
The car is a 2006 Cobalt SS, and we've taken off the very limited supercharger system in favor of something much more pleasing...a complete Hahn RaceCraft TurboSystem.
If you have the time, leaf through this most lengthy thread about the car:
The car features our innovative PortFueler system along with a Garrett GT35R turbo. It handily doubles the power of the supercharged version. Of course, it's just a matter of time before an ambitious Solstice GXP owner steps up to the plate for a similar setup. If you are that person, delay no longer...give us a shout!
Wait until we put some octane in her and REALLY turn up the boost!
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Bill Hahn Jr., Hahn RaceCraft, Inc. Home of the World's Quickest and Most Powerful Solstices
First to the 14's, 13's, and 12's in the 1/4 Mile
12.00 @ 117 MPH Street Solstice World Record
Hahn RaceCraft, Inc.
Turbocharging GM's since 1988 http://www.turbosystem.com
What a difference in torque/HP/RPM compared to ours. I can't believe their redline is that high. Pretty impressive. That is on the LSJ motor, how much different is the LNF to it? Is it just the difference of the Turbo vs SC?
I knew these days were coming, and have always been curious what a solstice is capable of with the right mods. Has the Cobalt's longblock been touched at all?
What a difference in torque/HP/RPM compared to ours. I can't believe their redline is that high. Pretty impressive. That is on the LSJ motor, how much different is the LNF to it? Is it just the difference of the Turbo vs SC?
The LSJ and LNF share a common heritage in that all Ecotec forced induction engines have always used the 2.0 liter formula. GM prefers it in higher-powered applications for its stiffer crankshaft and reduced centrifugal loading as compared to the 2.2 and 2.4 engines. Both LNF and LSJ share a common parent in the original Ecotec turbo, the European market Saab. Of course, Hahn RaceCraft has been turbocharging the Ecotec engine series since its introduction in North America in 2002. We've put smiles on hundreds of Ecotec owners' faces since, as well as developed significant power increase technologies across the Ecotec line. Turbosystem technology is what we do, and it's all we've done for 20 years! The following link touches on some of the Ecotec heritage we proudly claim:
The primary differences between LNF and LSJ involve the addition of VVT and Direct Injection to the LNF, other than the obvious aspect of setting aside supercharging for turbocharging. GM has likely produced more supercharged production vehicles than any other automaker (remember the supercharged 3800 V6?), and they had significant reasons to ultimately dismiss supercharging in favor of turbocharging with LNF.
The car featured in this buildup started as a supercharged LSJ Cobalt. General dissatisfaction with the supercharger's limited abilities to dependably provide higher HP numbers has led to a revolution in the Cobalt enthusiast ranks of converting to turbocharging. Doing so enables these enthusiasts to enjoy the full capabilities of the excellent LSJ engine. We are helping to spearhead this revolution, and have another customer with a stock-block LSJ that has produced 411 WHP. It's important to note that not only the enthusiast group has eschewed supercharging with a preference to turbos...GM itself followed suit with its new Cobalt SS Turbo!
What makes the engine illustrated in this dynorun such a rev-happy beast is a healthy-sized turbosystem combined with cylinder head and cam upgrades. It's an abolute thrill to hear! I will post links to dynorun videos too.
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Bill Hahn Jr., Hahn RaceCraft, Inc. Home of the World's Quickest and Most Powerful Solstices
First to the 14's, 13's, and 12's in the 1/4 Mile
12.00 @ 117 MPH Street Solstice World Record
Hahn RaceCraft, Inc.
Turbocharging GM's since 1988 http://www.turbosystem.com
I knew these days were coming, and have always been curious what a solstice is capable of with the right mods. Awesome numbers!!
What did you do for fuel?
Thank you
We added our very effective PortFueler system, and also re-tuned the stock PCM.
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Bill Hahn Jr., Hahn RaceCraft, Inc. Home of the World's Quickest and Most Powerful Solstices
First to the 14's, 13's, and 12's in the 1/4 Mile
12.00 @ 117 MPH Street Solstice World Record
Hahn RaceCraft, Inc.
Turbocharging GM's since 1988 http://www.turbosystem.com
It is somewhat misleading and disingenuous to assert or imply that GM's choice of turbo
power over supercharging is simply that one is better than the other.
The issue is complex, and simple answers usually fail on accuracy.
For example, GM's choice had much to do with emissions compliance (turbos, apparently
are more easily made clean-burners), and fuel economy (superchargers are thirstier on
boost).
But, possibly the most relevant issue is economics...Saab could provide GM with a
technology already developed and paid for, a technology which, apparently, is more
marketable in European countries also.
Overall, it is probably better not to get one's information from vendors with self interest to
promote one option over another...do your own research, and talk to consumers about
their experiences with each option.
Jackknife
Slow down there big fella. He simply stated that they replaced the "limited supercharger". He did not say anything about superchargers being limited in general, just the one installed on the cobalt. People say the same thing about the gxp turbo. It doesn't mean they are slamming turbo's. They just say that the power is limited on the gxp turbo.
Interesting thread, for a guy that is not super tech savie on forced induction, why the big difference between peak hp and peak tq?
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Envious, Vin #9234 - AEM CAI, Solo Header, Solo Cat, & Magnaflow Catback Exhaust. Eagle F1 GS-D3's. Werks ECM tune coming spring of 2009.
Why is the torque so low ? My car makes more torque than that, seems really odd. Nubbs has a GXP (with the Hahn intercooler by the way you guys are a sponsor) and a GMPP ECM that makes almost the reverse numbers on torque and HP.
__________________ Red Bull Drift Team 2008
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Dejon Intercooler, Intake Elbow, BOV spring
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SSR Type C wheels, Bridgestone Potenza RE-01's
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It is somewhat misleading and disingenuous to assert or imply that GM's choice of turbo
power over supercharging is simply that one is better than the other.
The issue is complex, and simple answers usually fail on accuracy.
For example, GM's choice had much to do with emissions compliance (turbos, apparently
are more easily made clean-burners), and fuel economy (superchargers are thirstier on
boost).
But, possibly the most relevant issue is economics...Saab could provide GM with a
technology already developed and paid for, a technology which, apparently, is more
marketable in European countries also.
Overall, it is probably better not to get one's information from vendors with self interest to
promote one option over another...do your own research, and talk to consumers about
their experiences with each option.
Jackknife
Having worked with four-cylinder turbocharged engines since the early 1970's, I'd be the first to point out that my bias is obvious, but...well, that certainly should be obvious .
But that's also a two-way street...Jack's signature suggests he may be a bit biased himself towards his forced induction of choice. And what could be more expected than cheering for your own team?
Nonetheless, beyond the apparent implications of GM's choice to end superchargers, and go turbo (they had a number of good reasons, two of which Jack indeed touches on), I can also provide some decidedly non-biased documentation as to their choice. Anyone care to see this?
__________________
Bill Hahn Jr., Hahn RaceCraft, Inc. Home of the World's Quickest and Most Powerful Solstices
First to the 14's, 13's, and 12's in the 1/4 Mile
12.00 @ 117 MPH Street Solstice World Record
Hahn RaceCraft, Inc.
Turbocharging GM's since 1988 http://www.turbosystem.com
Why is the torque so low ? My car makes more torque than that, seems really odd. Nubbs has a GXP (with the Hahn intercooler by the way you guys are a sponsor) and a GMPP ECM that makes almost the reverse numbers on torque and HP.
That's the signature of a large turbosystem and modified head and cams, all designed to predicate top-end airflow, with an attendant reduction in low-end torque. Keep in mind, ultimately this car will be capable of over 500 WHP with some octane, or about 600 engine HP, which requires a very sizable turbo on a 2.0 liter!
On the other end of the spectrum are cars like yours, as well as those modified with one of our Stage III TurboSystems on 2.4, for example. We have customers routinely report 300 WHP, with 330-340 Wtrq on such cars. They are torque monsters! But the GT35R Cobalt will still run and hide from them, sounding like a Hayabusa as it does so!
__________________
Bill Hahn Jr., Hahn RaceCraft, Inc. Home of the World's Quickest and Most Powerful Solstices
First to the 14's, 13's, and 12's in the 1/4 Mile
12.00 @ 117 MPH Street Solstice World Record
Hahn RaceCraft, Inc.
Turbocharging GM's since 1988 http://www.turbosystem.com
Having worked with four-cylinder turbocharged engines since the early 1970's, I'd be the first to point out that my bias is obvious, but...well, that certainly should be obvious .
But that's also a two-way street...Jack's signature suggests he may be a bit biased himself towards his forced induction of choice. And what could be more expected than cheering for your own team?
Nonetheless, beyond the apparent implications of GM's choice to end superchargers, and go turbo (they had a number of good reasons, two of which Jack indeed touches on), I can also provide some decidedly non-biased documentation as to their choice. Anyone care to see this?
I would be very interested in non-biased documentation (learning is a particular interest of
mine). Thank you for the offer.
For the record, although a SC enthusiast, you'll agree that in this thread I neither
promoted nor " cheered" for anything other than fairness and full disclosure.
Jackknife
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He simply stated that they replaced the "limited supercharger". He did not say anything about superchargers being limited in general, just the one installed on the cobalt. People say the same thing about the gxp turbo. It doesn't mean they are slamming turbo's. They just say that the power is limited on the gxp turbo. 
.