Why the Stage kit for HHRSS has less torque.
12-15-2008 | 08:17 PM
#1
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Senior Member
Joined: 01-28-2008
Posts: 355
From: INDIANA
Why the Stage kit for HHRSS has less torque.
Wonder why the Stage kit for the HHR SS has less torque, and at a higher RPM, than the Solstice/Sky Stage kit?
I believe its because they are FWD. Think about it, the SS is touchy sometimes the way it is. Notice how the torque rating is 315 at 4800 rpm instead of 340 at 3600? They are bringing in less boost, and at a later RPM, to help control the car when accellerating. They could have just as easy had 315 at the same 3600 rpm as the RWD cars, since they have electronic control of the wastegate. Its the same turbo, so why delay to a higher RPM? Control for the average enthusiast. Me, let me have it all, but the wife, well, maybe not. JMHO, what do you think?
Remember reading how the Dodge Caliber SRT Turbo is to hard to control? Great power, but a handfull.
I believe its because they are FWD. Think about it, the SS is touchy sometimes the way it is. Notice how the torque rating is 315 at 4800 rpm instead of 340 at 3600? They are bringing in less boost, and at a later RPM, to help control the car when accellerating. They could have just as easy had 315 at the same 3600 rpm as the RWD cars, since they have electronic control of the wastegate. Its the same turbo, so why delay to a higher RPM? Control for the average enthusiast. Me, let me have it all, but the wife, well, maybe not. JMHO, what do you think?
Remember reading how the Dodge Caliber SRT Turbo is to hard to control? Great power, but a handfull.
12-15-2008 | 10:00 PM
#2
Senior Member
Joined: 08-28-2008
Posts: 542
From: Houston, Texas
That sounds like logical reasoning. Speaking from the standpoint of my current tune, pressing down the gas pedal requires a straight road and a firm grip on the wheel. The HHR did a few involuntary lane changes when I first got it done. Be careful guys. :-O
12-16-2008 | 06:44 PM
#5
Senior Member
Joined: 09-07-2008
Posts: 1,016
From: Mebane, NC
Look at the torque curves in this post; https://www.chevyhhr.net/forums/show...25&postcount=1
Although they plotted as torque / MPH you can see they some are already exceeding the 340 mark. And that is at the wheels not the crank.
Are they able to plot torque to RPM? That will give a better idea of when it is coming in.
Although they plotted as torque / MPH you can see they some are already exceeding the 340 mark. And that is at the wheels not the crank.
Are they able to plot torque to RPM? That will give a better idea of when it is coming in.
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