Magnuson's TVS2650 Hellcat V8 supercharger swap makes 946 wheel horsepower at 5800 rpm

[Sticky]

The factory Hellcat blower is a 2.4 liter twin screw unit. A very good blower but if you want more power a bigger blower isn't a bad idea. What is interesting to note here is Magnuson's swap kit replaces the twin screw with a TVS2650 unit.

It is not a twin screw but a roots unit although a much more advanced design than traditional roots blowers.

The extra .25 liters is nice but it is the efficiency gain that making the real difference.

These were the claims Magnuson made last year when they announced the blower swap kit:

• True reliable operating range to 20,000 RPM
• 33% higher flow than TVS2300
• 10% higher flow than a 2.9 screw
• 14% higher adiabatic efficiency at 14k rpm and 2.0 pressure ratio compared to screw 2.9 at the same flow
• 75F lower discharge temperature at 14k rpm and 2.0 pressure ratio compared to screw 2.9 at the same flow
• 26 HP less input power required at 14k rpm and 2.0 pressure ration compared to screw 2.9 at the same flow

Well, they weren't lying as they hit 946 horsepower to the wheels on a stock internal Hellcat at only 5800 rpm while running out of fuel.

Some bigger injectors and... easy 1000+ rwhp? It sure looks like it.

[93siro]

I'm really impressed by the new TVS units, specially this 2650 unit with the 170 degree twist. They outflow bigger twinscrew units with Eaton reliability. Outstanding stuff.

[Sticky]

I'm really impressed by the new TVS units, specially this 2650 unit with the 170 degree twist. They outflow bigger twinscrew units with Eaton reliability. Outstanding stuff.

Same here. I'm surprised they do. The TVS blowers are excellent.

How long until the R8/Huracan guys figure out they should go to this blower?

[93siro]

Same here. I'm surprised they do. The TVS blowers are excellent.

How long until the R8/Huracan guys figure out they should go to this blower?

Here is some info i found earlier:

The Whipple is a screw charger requiring a male and female rotor to achieve the claimed internal compression. Due to this design the rotors must have a different number of lobes on each rotor - Whipple's design uses 5 lobes (on the female) and 3 lobes (on the male) Since the female rotor is the driven rotor, the male rotor must spin 5/3 times faster. The max RPM for the 2.9L is rated at 18000 RPM which means the male rotor is turning 30000RPM which is a pretty high bearing speeds for this unit.

The Eaton TVS 2300 is a high-helix roots supercharger meaning it utilizes a set of matched rotors (same # of lobes on each) and due to it’s design, it is not capable of internal compression (which minimizes pumping losses during cruise). It’s Eaton OEM rated speed is at the highest speed allowed for infinite bearing life (yes that means the bearing is expected to last forever) and a max temperature rise across the SC of ~130 degrees C (max outlet temp of 150C) which occurs at 18000 and 2.4 pressure ratio (21psi boost).
Not surprisingly the Whipple 2.9 uses the same bearings, so as you might guess there is quite a bit more flow in the Eaton TVS if we were to set its max speed to the same level as the 2.9L screw. Since both rotors spin the exact same speed in the TVS let’s increase that allowed bearing speed limit to 24000RPM. Now our 150C (302F) outlet temp still applies so we probably can’t run 21 PSI of boost continuously, but 18psi will probably be just fine for a V8 application.

At 18000 RPM a Whipple 2.9L blower is capable of moving 1720 CFM as per the Whipple website.
At 18000 RPM a TVS 2300 blower is capable of moving 1461 CFM.
At 22000 RPM a TVS 2300 blower is capable of moving 1770 CFM.
At 24000 RPM a TVS 2300 blower is capable of moving 1900 CFM.
So to match the 18000 RPM max output of a Whipple 2.9 you need to spin the TVS to about 21,500 – beyond that speed it will outflow the Whipple 2.9L.

A 90mm throttle body is enough flow to support about 750-800 RWHP on a TVS 2300 (the vacuum created by the inlet restriction will cause the bypass to start opening causing high inlet air temps, limit the boost and prevent higher power). To go beyond this you will need a larger 102mm or 108mm throttle body. At about 23000 RPM the inlet port in the TVS 2300 housing will become the restriction and prevent efficient operation at any higher speed so I don’t recommend operation beyond this point with a TVS2300.

[ND75R]

The extra 2.5 liters is nice

I believe you mean .25L? As much as I would like to see a 4.9L blower on a Hellcat it might not fit under the hood!

[Sticky]

As much as I would like to see a 4.9L blower on a Hellcat it might not fit under the hood!

Oh yeah? https://www.boostaddict.com/content....eel-horsepower

[ND75R]

Oh yeah? https://www.boostaddict.com/content....eel-horsepower

Well, I've been got.

[subaru335i]

There are a few companies working on 2650 kits for GM LT and LS motors which will be awesome. But the big debate now on the CTS-V forum is the 2650 vs twin turbo kit. It actually turns out the twin turbo is cheaper overall and more efficient with higher power potential.

[Sticky]

CTS-V forum is the 2650 vs twin turbo kit. It actually turns out the twin turbo is cheaper overall and more efficient with higher power potential.

Completely depends on goal I would guess.

Whose twin turbo kit?

[subaru335i]

Completely depends on goal I would guess.

Whose twin turbo kit?

Huronspeed just came out with an awesome and cheap turbo kit. It is literally less than half the price of the existing turbo kits and really good quality.
There are like 5 people that have gone twin turbo in the last month because of it. Gunna be awesome

http://shop.huronspeedproducts.com/H...ase-ctsvtt.htm

[Sticky]

Huronspeed just came out with an awesome and cheap turbo kit. It is literally less than half the price of the existing turbo kits and really good quality.
There are like 5 people that have gone twin turbo in the last month because of it. Gunna be awesome

http://shop.huronspeedproducts.com/H...ase-ctsvtt.htm

Priced really well but I see no graphs or results?

[subaru335i]

Priced really well but I see no graphs or results?

It just came out, there are one or two beta customers with finished kits and a bunch more in the middle of their builds.
Im sure I could find some graphs but it all depends on what turbos you choose and how strong you built your motor haha. The kit will make 2000+hp easy if you have big enough turbos and enough fuel.

One of the guys is doing twin PTE 6870's which should make a lot of power.

[Sticky]

It just came out, there are one or two beta customers with finished kits and a bunch more in the middle of their builds.
Im sure I could find some graphs but it all depends on what turbos you choose and how strong you built your motor haha. The kit will make 2000+hp easy if you have big enough turbos and enough fuel.

One of the guys is doing twin PTE 6870's which should make a lot of power.

I want to put up an article on it but I don't know where to begin.

[subaru335i]

I want to put up an article on it but I don't know where to begin.

http://www.ctsvowners.com/forum/4-en...win-turbo.html

This thread has like 10 people saying they are buying kits and there are a few more people that already have them.
You can reach out to Jon he is super nice and responsive. [email protected]