Tvs 1900....ottp stg5?
10-26-2014, 01:31 AM
#151
Doesn't have anything to do with ported heads or cams or intake manifold design, has more to do with the fact that superchargers will just never flow the same as a turbo, not to mention the fact that they rob power as they make it. You have to think, every time you increase the blower speed, pressure gradient in the manifold, or increase the size and weight of the blower (for instance this TVS1900) it takes more and more energy to drive it through the belt system. Eaton stated years ago that (when properly sized and run at the rated speed) their 3rd generation superchargers would use anywhere from 8-10% of an engine's crank hp to drive the supercharger at its peak RPM. Any modification you do to the blower increases this parasitic draw exponentially. That is why the power gains become less and less significant the faster you spin a blower, M62 for example, not to mention they also become less efficient. Turbo's work entirely differently, they efficiently use engine waste to generate power, they push more CFM and they have no parasitic draw.
10-26-2014, 01:47 AM
#152
Senior Member
10-26-2014, 02:02 AM
#153
Yes, they couldn't comprehend that it's so much bigger it just takes more energy to spin at the same speed. I could see possibly 300 HP vs 300 HP because it's spinning so much slower but they didn't want to hear it. Just a bunch of uninformed idiots in a circle jerk over the 1900. Yes it's nice but half them don't understand it. One guy who I had the pleasantry to meet just has no idea, TVS car without any cooling mods...
10-26-2014, 02:12 AM
#154
Senior Member
Yes, they couldn't comprehend that it's so much bigger it just takes more energy to spin at the same speed. I could see possibly 300 HP vs 300 HP because it's spinning so much slower but they didn't want to hear it. Just a bunch of uninformed idiots in a circle jerk over the 1900. Yes it's nice but half them don't understand it. One guy who I had the pleasantry to meet just has no idea, TVS car without any cooling mods...
10-26-2014, 02:28 AM
#156
Senior Member
I believe that the 1900 can prob flow the air to make the 550hp rating but I don't think it will happen on an lsj. I would love to see it and will be stoked if it happens but it's a lot of mass to turn for just a 2L 4cyl
10-26-2014, 02:44 AM
#158
Senior Member
10-26-2014, 03:41 AM
#160
Senior Member
10-26-2014, 07:38 AM
#161
If the SS Gang is anything like Redline Forums Facebook Style, then their is only a handful of people that know what theyre talking about.
The rest are like, "im running a 2.6 pulley with just a fmhe because racecar!".
Which is why I stick to the forums. More people know what theyre talking about, and the information is at least archived on here.
Like this topic for example. Yes, I like it and want it. But I wont make any decisions until I see more tests from the people that know what theyre talking about. I want my facts straight so I am not one of those people.
The rest are like, "im running a 2.6 pulley with just a fmhe because racecar!".
Which is why I stick to the forums. More people know what theyre talking about, and the information is at least archived on here.
Like this topic for example. Yes, I like it and want it. But I wont make any decisions until I see more tests from the people that know what theyre talking about. I want my facts straight so I am not one of those people.
10-26-2014, 09:09 AM
#162
The comparison should be between the 1320 and the 1900 because they are in the same family. We know that a 1320 can make about a max of 400 whp. Lets assume you are spinning it to the end of it's compressor map which is about 18,000 rpm (that's a 2.6" pulley at 7200 rpm). To equal that same amount of airflow from the 1900 you only have to spin it about 13,000 rpm. The 1900 is also about 67% efficient and the 1320 is only about 55% at this flow and pressure. This is at a 2.4 pressure ratio which is about 21 psi. The faster you have to turn something the more power it's going to take. I don't have time to find the specs on weight and do the math at this moment but I suspect that the 1320 is taking more power to turn at this point than the 1900 is. For sure the 1900 is putting out less heat. I will send an email to Harrop and see if they have graphed blower speed vs hp consumed for either blower.
10-26-2014, 09:22 AM
#164
Senior Member
That band of idiots and their lack-lustrous leader need to get exterminated. They are diluting the gene pool.
10-26-2014, 09:54 AM
#165
Senior Member
The comparison should be between the 1320 and the 1900 because they are in the same family. We know that a 1320 can make about a max of 400 whp. Lets assume you are spinning it to the end of it's compressor map which is about 18,000 rpm (that's a 2.6" pulley at 7200 rpm). To equal that same amount of airflow from the 1900 you only have to spin it about 13,000 rpm. The 1900 is also about 67% efficient and the 1320 is only about 55% at this flow and pressure. This is at a 2.4 pressure ratio which is about 21 psi. The faster you have to turn something the more power it's going to take. I don't have time to find the specs on weight and do the math at this moment but I suspect that the 1320 is taking more power to turn at this point than the 1900 is. For sure the 1900 is putting out less heat. I will send an email to Harrop and see if they have graphed blower speed vs hp consumed for either blower.
10-26-2014, 10:00 AM
#166
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10-26-2014, 08:25 PM
#170
Senior Member
10-27-2014, 03:57 AM
#172
Senior Member
Is the belt system strong enough to spin a 500hp supercharger without slipping?
10-27-2014, 07:45 AM
#175
Senior Member
I feel the same way about the cobalt community as a whole, maybe a hand full of people that know what they are talking about, and the rest of the self proclaimed experts probably never dealt with modifying cars before they got their cobalt.