How much boost with 2300 and 6rib?
12-23-2010, 10:56 AM
#12
122 is a 122ci. 3 lobe rotors, 60 degree twist
TVS2300 is a 140ci. 4 lobe rotors, 160 degree twist
Last edited by 03sierraslt; 12-23-2010 at 11:01 AM.
12-23-2010, 05:06 PM
#16
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I am jelous of your 2300 :nunchuk1:
12-23-2010, 10:10 PM
#19
). I've gone down as low as a 2.6" snout pulley on my MP122 without any belt slip. On my setup, that makes about 9psi. If you do a little math (I know....dangerous as hell....but I'm doing it anyway
), a 2.6" pulley on the snout of my MP122, is spinning blower about 17,000 rpm at 6000 motor rpm. 122 cubic inches of blower displacement is moving 1,221 cfm of air at 6,000 rpm. Moving that much air with the MP122 is impressive, but IAT's of 90 degrees over ambient just isn't. That 90 degrees over ambient is measured after w/w fluid injection. This rig works for a living west of Houston, TX and it's hot here. 90 + 90 = timing pulled and a short engine life. Shooooot.Enter TVS2300. If you do a little more math (again...very dangerous for me
) and substitute the TVS2300 for the MP122, it gets interesting. To move the same amount of air with the 2300, I think I need a 3.0" snout pulley. You do the math, but I think I'm right. Now, here's the rub. My TVS2300 came with a 3.4" snout pulley. On my motor, I see 8psi with the TVS. With my MP122, I saw 9psi with a 2.6" snout pulley. Conventional wisdom says that a decrease of .1" will equal an additional 1psi. That means that a 3.3" pulley on my new TVS will show similar boost as my MP122 did with a 2.6" pulley. The math says that I need a 3" pulley to move the same amount of air with the 2300 that my MP122 did with a 2.6" pulley. Math says 3.0...conventional wisdom says 3.3. Hmmmm.
I know these blowers aren't exactly positive displacement, but they're close. The TVS blowers are more "effecient", but are they that much better? Just trying to buy one additional pulley and get it right the first time. At a hundred + bucks a pop, just don't want to have a bunch of pulleys laying around.
