rmcdaniels
11-06-2006, 12:31 PM
Cliff's notes: JRSC that makes 10-20 PSI efficiently
As you may or may not know, Eaton has been working on a re-design of their Roots blower for some time. If you look at compressor maps of their current blowers, they tend to have a sweet spot, efficiency-wise, in the neighborhood of a pressure ratio of 1.4-1.5 (6-7 PSI), and it's rather narrow in terms of CFM. That's great if you only want 6-7 PSI and have a motor that moves an average amount of air for it's size (not a Honda/Acura B-series VTEC motor), but their peak efficiency range is rather narrow and goes quickly to hell when you try to run more pressure or more CFM, or, God help you B-series VTEC owners, both.
The blowers are now out, they are called TVS superchargers, and they are on the Web site:
http://www.eatonperformance.com/superchargers/TVS.html
Here are some pictures of one at SEMA from a few days ago (My tuner, jDogg on H-T, took some pics and got some information from the tech guys at the Eaton booth):
http://s115271005.onlinehome.us/TVS/TVS373.JPG
http://s115271005.onlinehome.us/TVS/TVS375.JPG
http://s115271005.onlinehome.us/TVS/TVS376.JPG
As you can see, the blower has more lobes/rotor than the old blowers, more helical twist, and more intake/outlet area, but it is still a Roots design, not a Lysholm. These blowers move a lot more air at much higher pressures than the old design.
Eaton will be making bolt-in replacements for previous M-series blowers, starting with the M-112 for the Cobra/Lightning crowd, and eventually getting to our CCW M-62 replacement around Q3/07. Replacing a M-112 on a SVT Cobra with it's new TVS equivalent bolt-in replacement blower nets 250 extra WHP after tuning. That's a 75% increase in power, which is huge. If I get that kind of improvement to my setup, then I'll be making over 500 WHP.
Here's a map of a 5th gen M62 blower, this is more efficient than the 3rd gen M62 blowers that most of us B-series VTEC guys have, but it's close, and may be closer to the map for a ported 3rd gen M62 that some of us are running. I have plotted the requirements of my new motor against it at 10 and 15 PSI, no sense plotting it at 18 PSI because none of the plots would be anywhere near the map. As you can see, the 15 PSI plots are mostly at the edge of the map as it is:
http://s115271005.onlinehome.us/TVS/M62_Plotted.jpg
The 10 PSI (red) plot is about what I run (when my motor is together, new pistons should be in next week), and it's not too bad, only dropping below 60% as the motor approaches 6K RPM, and doing some inperpolating, probably hitting 50% by the time it hits 8K RPM. At 15 PSI it never hits 60%, and at 8K, I'd have to guess (because the plot is so far out in the weeds) that it is in the mid-40's. This is what we currently have to deal with, and if you get up around 275+ WHP with this blower, then you done good.
Now for the new TVS R900. I used the R900 because while it is a hair smaller than an M62, it is the closest in size to the M62 and therefore seems most likely to be the replacement for the M62. I'd rather have an R1320, but if they release a production CCW R900 that I can just bolt on and go, then I'll take it. I plotted my motor on it at 10, 15, and 18 PSI. Vive la Différence!
http://s115271005.onlinehome.us/TVS/TVS_R900_Plotted.jpg
My 10 PSI application is right in the sweet spot of this blower, and 15 PSI is excellent as well. 18 PSI gets a bit out there up around 8K RPM, but it looks like it never goes below 55%. I would buy one of these today if they'd sell it to me.
This looks like it could replace the current dual-sequential charger setup that we put on Mark Osgood's car, we won't need a turbo when we can make 15-18 PSI efficiently with just the blower. We'll probably run our cars next year with our current setups:
Me: JRSC on a RLZ-built B18+ Dart-block 95mm stroker setup with 10 PSI from an intercooled Endyn-modified blower running D-mod at Solo1 (road course time trial) events
Mark: sleeved/jDogg-built LS/VTEC running 18 PSI from a dual sequential JRSC/Big-16G setup running Street-Mod Solo2 (autocross) events
Then if they produce a CCW M62 replacement in Q3/07 like the tech at SEMA said they would, we'll probably replace our setups with TVS blowers over the winter.
I'll be talking to people that I know in the SC industry to see when I can get my hands on one of these blowers, as well as contacting Eaton directly to make sure they know that the interest is there for a CCW M62 replacement blower, I'd advise you contact Eaton about it as well if you'd like to see this product. I don't know that it will make a difference, but I don't think that it can hurt.
For any of you that weren't familiar with my JRSC setup:
http://s115271005.onlinehome.us/images/dyno40.JPG
That's actually on my old, slightly messed-up motor. My new motor is still at RLZ, waiting on my pistons to come from Wiseco. We expect them in the next week or two.
As you may or may not know, Eaton has been working on a re-design of their Roots blower for some time. If you look at compressor maps of their current blowers, they tend to have a sweet spot, efficiency-wise, in the neighborhood of a pressure ratio of 1.4-1.5 (6-7 PSI), and it's rather narrow in terms of CFM. That's great if you only want 6-7 PSI and have a motor that moves an average amount of air for it's size (not a Honda/Acura B-series VTEC motor), but their peak efficiency range is rather narrow and goes quickly to hell when you try to run more pressure or more CFM, or, God help you B-series VTEC owners, both.
The blowers are now out, they are called TVS superchargers, and they are on the Web site:
http://www.eatonperformance.com/superchargers/TVS.html
Here are some pictures of one at SEMA from a few days ago (My tuner, jDogg on H-T, took some pics and got some information from the tech guys at the Eaton booth):
http://s115271005.onlinehome.us/TVS/TVS373.JPG
http://s115271005.onlinehome.us/TVS/TVS375.JPG
http://s115271005.onlinehome.us/TVS/TVS376.JPG
As you can see, the blower has more lobes/rotor than the old blowers, more helical twist, and more intake/outlet area, but it is still a Roots design, not a Lysholm. These blowers move a lot more air at much higher pressures than the old design.
Eaton will be making bolt-in replacements for previous M-series blowers, starting with the M-112 for the Cobra/Lightning crowd, and eventually getting to our CCW M-62 replacement around Q3/07. Replacing a M-112 on a SVT Cobra with it's new TVS equivalent bolt-in replacement blower nets 250 extra WHP after tuning. That's a 75% increase in power, which is huge. If I get that kind of improvement to my setup, then I'll be making over 500 WHP.
Here's a map of a 5th gen M62 blower, this is more efficient than the 3rd gen M62 blowers that most of us B-series VTEC guys have, but it's close, and may be closer to the map for a ported 3rd gen M62 that some of us are running. I have plotted the requirements of my new motor against it at 10 and 15 PSI, no sense plotting it at 18 PSI because none of the plots would be anywhere near the map. As you can see, the 15 PSI plots are mostly at the edge of the map as it is:
http://s115271005.onlinehome.us/TVS/M62_Plotted.jpg
The 10 PSI (red) plot is about what I run (when my motor is together, new pistons should be in next week), and it's not too bad, only dropping below 60% as the motor approaches 6K RPM, and doing some inperpolating, probably hitting 50% by the time it hits 8K RPM. At 15 PSI it never hits 60%, and at 8K, I'd have to guess (because the plot is so far out in the weeds) that it is in the mid-40's. This is what we currently have to deal with, and if you get up around 275+ WHP with this blower, then you done good.
Now for the new TVS R900. I used the R900 because while it is a hair smaller than an M62, it is the closest in size to the M62 and therefore seems most likely to be the replacement for the M62. I'd rather have an R1320, but if they release a production CCW R900 that I can just bolt on and go, then I'll take it. I plotted my motor on it at 10, 15, and 18 PSI. Vive la Différence!
http://s115271005.onlinehome.us/TVS/TVS_R900_Plotted.jpg
My 10 PSI application is right in the sweet spot of this blower, and 15 PSI is excellent as well. 18 PSI gets a bit out there up around 8K RPM, but it looks like it never goes below 55%. I would buy one of these today if they'd sell it to me.
This looks like it could replace the current dual-sequential charger setup that we put on Mark Osgood's car, we won't need a turbo when we can make 15-18 PSI efficiently with just the blower. We'll probably run our cars next year with our current setups:
Me: JRSC on a RLZ-built B18+ Dart-block 95mm stroker setup with 10 PSI from an intercooled Endyn-modified blower running D-mod at Solo1 (road course time trial) events
Mark: sleeved/jDogg-built LS/VTEC running 18 PSI from a dual sequential JRSC/Big-16G setup running Street-Mod Solo2 (autocross) events
Then if they produce a CCW M62 replacement in Q3/07 like the tech at SEMA said they would, we'll probably replace our setups with TVS blowers over the winter.
I'll be talking to people that I know in the SC industry to see when I can get my hands on one of these blowers, as well as contacting Eaton directly to make sure they know that the interest is there for a CCW M62 replacement blower, I'd advise you contact Eaton about it as well if you'd like to see this product. I don't know that it will make a difference, but I don't think that it can hurt.
For any of you that weren't familiar with my JRSC setup:
http://s115271005.onlinehome.us/images/dyno40.JPG
That's actually on my old, slightly messed-up motor. My new motor is still at RLZ, waiting on my pistons to come from Wiseco. We expect them in the next week or two.