Erratic response / 21 Sport S max tow with Magnuson

[SuperJ]

Hello all, I've had my JT since April of 2021 and love it. I added a Magnuson supercharger a couple months ago and have been a little disappointed in the performance. Specifically, it doesn't feel that much more powerful than before. I reinstalled the Banks Pedal Monster I had pre-supercharger and it made it more responsive and I recently added a Tazer Mini, which lets me show a vac/boost gauge in the EVIC. The motor spends most of its time in vacuum, but if I get on it, goes to boost. The most I've seen is about 3 psi and it's 100% noticeable when it goes to boost. But it doesn't seem to want to stay there. I've felt this towing and now seeing the data kind of puts things together.

I've never had a supercharged vehicle before but my results don't seem as positive as some others I've read about. I'm running the initial tune from Magnuson and haven't been able to get tuning support, other than them asking me (twice) if I'm running a snorkel or something else that may restrict airflow - I'm not - I'm using the maggie air tube and stock air box. The vehicle has about 8,000 miles and is only running 33" tires with a front leveling kit.

I feel like it's a tuning issue but that's just a guess. Any advice?

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[JeepOfTheseus]

You should probably ask in the Forced Induction section. If it’s a 21 model, there is a chance the tables were changed and apparently it’s been a struggle to get it right. Not sure if that would explain performance issues - I’ll let experts speak to that - but I will say that adding a throttle controller isn’t advised afaik since it messes with things further.

Your best bet is find out if there is a local tuner who can dial it in for you. Magnuson won’t help you out (as you’ve already learned).

 

[SuperJ]

Thanks man, I totally missed the forced induction area. I moved it over there and will close this thread if I can figure out how .

 

[Tbanks]

Install HP Tuner on a laptop and do some logging. Send that log to Magnuson which can show the boost levels which should be 8lbs not 3. I had a couple issues and they took care of me.

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