Why did you go with the URD opposed to the Magnuson?
Cost. Either way this is a lot of money to spend on a modification.
Magnuson $5500
URD/Whipple $6500
Availability.
Magnuson 4-6 months or more, though improving
URD/Whipple ~1 month
Install - Magnuson requires less because they don't require removing fuel tank skid, dropping fuel tank, replacing fuel pump, and replacing fuel injectors like the URD/Whipple kit.
Power, numbers were hard to find, but the winner here is obviously the URD/Whipple.
Design
Magnuson, Roots style
URD/Whipple, Twin screw
Initially I was also on the fence, until I read this article:
Roots VS Twin Screw Superchargers
I'm a nerdy math and science kind of guy who loves to know how things work, so the engineer part of me saw that and basically decided on the URD/Whipple then.
Information Available: While there's more than a few helpful threads on the Magnuson, there was no information on the URD/Whipple. The info that was available for the Magnuson was a mixed bag. I'm sure a lot of that was from people getting yanked around, it's a TRD Kit then it's not, and taking forever to get one.
I've dealt with Steve/Gadget at URD for the exhaust, and hit him with an arsenal of questions about the URD/Whipple before ordering. Steve/Gadget had an answer for every question, even my idiot ones (I do live up to my name occasionally). He was able to explain everything in a way that I could understand if I had to do it, even if I wasn't going to be able to tackle the install myself. Having that level of support was also appealing.
I opted for a professional install anyway because I'm doing 6-day weeks that include 1st, 2nd, & 3rd shift in the same week and the 4Runner is my only vehicle.
I can't lie, the more powerful URD/Whipple always had appeal, but the design had a major influence after reading the above article. I'd also rather deal with URD over Magnuson, given my experiences and other SC threads.
So that's where all my overtime money went!
As for how things are going now that I've had a week or so with the URD/Whipple SC installed. Things are going horribly! I've had 3 speeding tickets, 1 noise complaint, and a wreckless driving charge for leaving some of my AT tires in the pavement.... Kidding! Actually I've been very happy with the supercharger. My truck now lives below 3000rpm and still has plenty of power there. The real test will come when running down to TN in early October, although I probably won't be dragging the boat.
City driving I can see the fuel economy suffer, but on the highway it is certainly improved. I'm still working through my first full tank, so expect real numbers later on.
Dyno run information
May just sell it and get a JLUR.
LOL.... :ban:
