For 2015 Sienna, what Performance Module or Chip best to buy?
You want to sup up a mom van? 😆
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It's not just a boring old "mom van" it's a Swagger Wagon!
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None.
Seriously, the best thing you can do is leave it stock and drive it. Otherwise you will just be messing up the reliability for no reason.
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Seems like you want a van that can take your kids to soccer fields faster lol. Only do this if you cared about speed which you have to suffer reliability and gas mileage.
yeah, the sienna lasts a long time as is but if you are trying to add performance mods it probably won't last as long. so i wouldn't recommend doing it unless you are trying to do a sleeper mod.
The Sienna is not a performance machine. I would just leave it as is or you may compromise reliability.
I need more Horse Power and torque for driving in the hill country with the trailer hooked up. 30 hp and more torque always helps. I could go back to the original set up after the trip.
I would just take it nice and easy towing a trailer with a minivan. No smashing the throttle, no performance tuning. Slow and steady. If you value your Sienna that is.
Wow. Sleeper mini van. Wow
Do what Lotus did - put on a supercharger for 400 hp from that v6
https://en.wikipedia.org/wiki/Lotus_Evora
Nice reading. How do put on a supercharger on my Sienna?
Well, here might be a good place to find out what folks are doing - I have found Toyotanation to be very helpful for both repair and tuning info.
https://www.toyotanation.com/search/1552202/?q=supercharger+v6&o=relevance
If you go ahead, note that I imagine transmission mods to handle the extra HP would be pretty vital.