Which Supercharger would you go with?

[UselessPickles]

I think it's too early to make any decisions based on tune quality. Everyone is still working out some annoyances in their tunes. If RIPP has the best tune right now, it's probably most likely because they got to market first and have a head start on getting feedback and data logs from many customers. If tuning annoyances are an absolute deal breaker for you, I think the best decision would be to be patient and wait a while for more fine tuning from all the manufacturers, and get more feedback from owners of each kit with future refined tunes.

Based on boost/torque curve shapes alone, I like the twin screw style (Sprintex). Big gains throughout the RPM range, but biased toward the upper RPM range. Boost at low RPM is rougher on the engine than the same boost at higher RPM. Also, having big boost at low RPM would most likely tempt me to make use of that boost at low RPM, potentially lugging the engine (but letting the boost "push" through the lugging). Biasing the gains toward higher RPM rewards/encourages you to downshift and make use of RPMs to get power, which is gentler on the engine. This isn't as much of a concern if you have an auto trans, since it will automatically downshift as you press the throttle down more.

At the same time, though, an auto trans means that a kit biased toward high RPM power will give you the best results for street driving. Push the pedal down, transmission will downshift, and you'll be at higher RPMs making big power. You'll rarely be able to make use of any big low RPM boost with an auto trans (only when at low enough speeds that the transmission can't downshift because you're already in 1st gear at low RPM).

What I'd really like to see is a dyno chart comparing torque curves of ALL forced induction options on the Wrangler, from the same dyno

One detail I don't like about the Sprintex and Magnuson is that the IAT (intake air temp) sensor is BEFORE the supercharger, so it's not actually measuring the temp of the air entering the engine. After the temp is measured, the air gets heated up as it's compressed, then cooled back down some amount by the air-water heat exchanger. How can the tune accurately take into account the final air temp if it's not directly measured? I'd like to know more about how they deal with this.

You should also read through the install guides yourself to see exactly how involved each kit is.
Magnuson: https://www.quadratec.com/Assets/Ins...ion/200973.pdf
Sprintex: http://www.sprintex.com.au/wp-conten...igned-off..pdf
RIPP: Can't find it online with a quick search. Contact RIPP?

BTW - Those install guides are all MUCH more clear/detailed than the Prodigy install guide. The supercharger install guides are actually targeted at competent DIYers, where the Prodigy install guide is targeted at experienced install shops that are assumed to already have all the best-practices knowledge, easy access to look up torque specs, etc.One of the guides above gives details instructions on how to disconnect the fuel line, which would have saved me from breaking the clips if the Prodigy instructions included that detail

Magnuson and Sprintex install are more involved/complex than RIPP because of the air-water intercoolers.

I like that Magnuson and Sprintex both retain the stock air box, for max protection against water ingestion. This also means that snorkel kits are directly compatible with these superchargers.

It's really a tough decision that can only be made based on your personal priorities. For example, I actually like the torque curve of the Sprintex better than the turbo... but there's just something about turbos that made me want the turbo more. The overall subjective experience of driving a turbo vehicle won for me.

Basically, if there's one particular style of forced induction that you really like for no particular logical reason, go for it. The stock engine is already practical. We're beyond practicality now when adding forced induction, so pick what will make you smile every day, rather than what is objectively practical.

[Timmy]

Wow! Thanks for taking the time to write that entire thing Pickles! I'm going to have to go back and re-read to digest it all when I have more time. I didn't realize that roots vs. twin screw were that big of a difference, but as I've started to do some research, I'm learning they are. I am finding interesting information that the Eaton SC that Mag uses is not technically a roots, but more of a roots/twin screw hybrid. I'll have to research into that more to confirm though, and to find out exactly what that means!