Sterling is testing the Rtech Twin Blower now!
04-04-2006 | 10:46 PM
#11
Rob
Joined: Aug 2001
Posts: 21,637
Likes: 12
From: Ms
Re: Sterling is testing the Rtech Twin Blower now!
Originally Posted by tomcat
We are testing on Sterling's dyno using a Sterling engine. This was done to prevent any "confusion" about the HP being achieved. Also because their dyno is set up to datalog multiple temps, pressures and flowrates that I need to know.
The picture was taken after removal of the PSI blower; mocking up the twin blower installation. The mechanical fuel pump had to be relocated.
Sterling's PSI engine is a known quantity, 1500-1550 HP all day long at a known boost level. The purpose of the test is to see if we can safely increase that HP with more boost, better intercooling and lower parasitic losses.
The picture was taken after removal of the PSI blower; mocking up the twin blower installation. The mechanical fuel pump had to be relocated.
Sterling's PSI engine is a known quantity, 1500-1550 HP all day long at a known boost level. The purpose of the test is to see if we can safely increase that HP with more boost, better intercooling and lower parasitic losses.
Rob
__________________
.
The Only Time You Have To Much Ammo Is When Your Swimming Or On Fire.
.
The Only Time You Have To Much Ammo Is When Your Swimming Or On Fire.
Last edited by Strip Poker 388; 04-04-2006 at 10:55 PM.
04-05-2006 | 09:08 AM
#12
Thread Starter
Registered
Joined: Feb 2001
Posts: 1,519
Likes: 32
Re: Sterling is testing the Rtech Twin Blower now!
Hi Rob:
On the first runs the system made too much boost and the pulleys are now being changed. If we do a test at the same boost level I can tell you that the centrifugal will make more power because of lower parasitic loss. But a "same boost" test takes no advantage of the better intercooling that is possible with the centrifugal layout.
The really interesting question is "If you can safely run a given boost level with a MAT of 190F after the intercooler, how much more boost can you safely run with 90F after the intercooler?" The challenge for the tuner is to find this new sweet spot.
Tom
On the first runs the system made too much boost and the pulleys are now being changed. If we do a test at the same boost level I can tell you that the centrifugal will make more power because of lower parasitic loss. But a "same boost" test takes no advantage of the better intercooling that is possible with the centrifugal layout.
The really interesting question is "If you can safely run a given boost level with a MAT of 190F after the intercooler, how much more boost can you safely run with 90F after the intercooler?" The challenge for the tuner is to find this new sweet spot.
Tom
04-05-2006 | 09:24 AM
#14
Registered
Joined: May 2003
Posts: 3,133
Likes: 2
From: E-Dock
Re: Sterling is testing the Rtech Twin Blower now!
If your doing a comparison with the same boost, I understand that the Hp would be more if there is less parasitic loss, but wouldn't there also be more hp if your intercooler is more efficient. ie isn't cooler air more dense?
04-05-2006 | 06:03 PM
#17
Thread Starter
Registered
Joined: Feb 2001
Posts: 1,519
Likes: 32
Re: Sterling is testing the Rtech Twin Blower now!
42MTI: You are correct; thanks for pointing that out. Same boost at lower temp is better and would increase the observed HP advantage. Not like me to miss an opportunity to mention density ratio. 
I don't even know what their dyno setup is, just that it goes to 2000 HP.
I don't even know what their dyno setup is, just that it goes to 2000 HP.
04-05-2006 | 08:30 PM
#18
Registered
Joined: Jan 2001
Posts: 1,461
Likes: 3
From: PA and MD
Re: Sterling is testing the Rtech Twin Blower now!
What rpm do those motors turn? What is your pully ratio? What rpm are the blowers turning? 22PSI WOW!! I can't wait for the dyno curves and boost curve. Nice work.
