I'll take that 1900 and you can put that toward a 2300

 

I was thinking the same thing but the 1900 can be pushed harder than the 2300. Plus, if I'm switching out a supercharger I'm going to a 2650. Only problem is you have to switch heads and change out to a camero accessory drive.

 

I figured you’d go straight to a 2650 which would be sweet but way overkill for a stock rob and crank motor like this. What do you mean by “the 1900 can be pushed harder”?

 

I presume he is referring to the isentropic efficiency of the two. Per the maps below, if you max out a 1900 (18K RPM, 2.4 PR, 2250 KG/H) it uses ~68KW to turn the blower at 55-60% efficiency. The same air mass and pressure ratio on a 2300 is actually off the charts but would occur at ~15K RPM, 60-65% efficiency and use 90KW to turn the blower. For this example the 1900 would take less power to turn but create more heat, ie less efficient, doing so.

TVS 2300


TVS 1900


Another realistic example... A healthy 5.3L would consume ~1180 KG/H at 6500 RPM. Pushing a 1900 to 17K RPM would net ~1.8 PR and land in the 60-65% efficiency and 50-56 KW parasitic draw range. The same air mass (ie power) with a 2300 would also land in the 60-65% efficiency and 50-58KW draw range, but at only a little over 14K RPM. Peak power production would be nearly indistinguishable but the 1900 is going to feel better at lower rpm due to the higher pulley ratio required. On the flip side, using the same pulley ratio on the 2300 would net ~2700 KH/H at a 2.3 PR in a 55-60% efficiency and take 98KW to turn.

To sum it up, the 1900 is a bit more efficient in its max air flow areas than the 2300.

 

Thank you for the info! I know there was a post loosely about this sometime ago but I was unsuccessful in my search. Guess I might as well stick with the 1900 the mildly better down low response will be welcomed with the bigger tires and cam that’s a little more oriented to the top end then the previous cam was.

 

Here's what the spreadsheet tells me

 

Brian (Scol) might. Call them. Just remeber they need to resale it so they may need to rebuild it to put there OK on it and stand behind it.

 

Once pushed outside of the recommended max rotor speed the 1900 is also a better choice. I've read where the salt lake boys are pushing them to 22 or 23k max rotor speed and that's not running a 1/4 mile either. I wouldn't recommend it but obviously it's being done.

 

or you could just use an appropriately-sized blower for your application & airflow requirements.


guys be like "God forbid i direct-swap an LS9 blower onto my LSA... i'd rather custom-mill a 1.8" pulley onto a one-off 15rib drive & then port out every ounce of 'extra' material from the blower case. and then i'll rig up nitrous bars inside to combat the insane IATs i just created."

 

The chance of this thing ever seeing a drag strip or dyno is pretty scarce and I’m a sissy over about 90mph especially in something with no sway bars so I think sticking with the 1900 is fine for me. Both will turn tires into smoke just fine.

Got a little more time to paint today, this time was laying on my back getting the bottoms of the frame rails, hella fun….. also took stock of some parts and noticed the hitch I’ve towed all my personal belongs with cross country multiple times is looking a little rough. Need to get these brackets cut off somehow, might borrow a plasma torch because I don’t think there’s anyway to get a grinder up in there safely.