Whipple or Roush?

[matt1234!]

Hey guys so I have had the car a couple years now and i have always thought of supercharging it but now getting more serious about it. So I thought just go with the roush but then had some people saying whipple. My car is a 2020 GT only has a short throw and catback exhaust so no real mods. Is there suggested mods before supercharging? Also I have seen phase 1, 2, 3. From what I am reading it's phase 2 roush that is recommended? I would love to gain power in the lower RPM if that's possible. Has anyone done this and what do you think of it? Does the car gain a lot of low end power or does it need to be revved up fairly high to gain that added HP? Thanks in advance.

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[engineermike]

Both of those blowers will improve low-end torque.

Most will answer the same, that the Whipple kit is clearly superior, with good reason. The Roush rotor pack is smaller and they restricted it further with a poor flowing housing, the intercooler is laughably small, the throttle body is a gt350 unit and also undersized, and it doesn’t even come with a fuel pump upgrade. That said, some cars manage to get into the mid 130’s in the quarter with them in good weather. In extreme heat, some are barely faster than stock. That said, the Roush tune was heavily, if not completely, developed by ford. It’s very oem-like behind-the-scenes, which is worth a lot in my book.

Both kits will likely fail cats and the stock Roush kit may fail the fuel pump. Roush appears to be worse for cats, possibly due to higher boost and charge temps.

One other thing is that if you run the Roush kit on e85 it largely negates the poor intercooler. Technically this can be done on the stock fuel pump (with bap) and injectors but most (including tuners) will tell you otherwise.

I own one of each, btw.

 

[robvas]

I would consider the Edelbrock/VMP superchargers when you are looking

 

[HKusp]

Listen to Mike, he knows of what he speaks. I have a Whipple Stage 2, and you will have to upgrade a few things to take full advantage of either, even using it only on the street. The stock injectors will leave you limited so You are going to want to go with a set at least as big as the 52/56lb units for the old GT500's if not bigger. Most recommend something in the 1000cc range like FIC 1000's or ID1050x's. Next, you will be seriously limited on traction once you get north of 650whp and both of those set-ups are very capable of that, with the Whipple able to support north of 1000whp with the right fueling.

It really depends on what your goals are, but The Roush is going to be limited due heat soak much sooner than the Whipple will. There are ways to minimize it, for sure, but it is more of an issue with the Roush than it is with the Whipple due to the differences in design and the type of supercharger they use. TVS, versus twin screw. The Whipple twin screw runs cooler for the same amount of boost than the TVS which produce more heat per pound of boost.

 

[engineermike]

I would consider the Edelbrock/VMP superchargers when you are looking

I do like these systems from a mechanical perspective, but the supplied tuning is pretty bad, especially the edelbrock..

 

[DefaultDriver1]

Ford installs the TVS style blowers on their vehicles at the factory so that is the style of blower I went with. Roush, VMP Odin, Edelbrock and some others are all the same internals. The components of the kit were the determining factor as well as customer support. I chose the full VMP Odin stage 2 kit with upgraded underhood ice tank. It includes 56# injectors and a dual fan heat exchanger. The cooling capacity of the Roush due to it being an older generation unit is not equal to the VMP Odin's inverted set up with the cooling packs on top of the rotors. I absolutely love it. VMP customer service is very good and tuning revisions are part of the deal to get it dialed in to your specific set up.

 

[engineermike]

@DefaultDriver1 love the color combination!

 

[matt1234!]

So it doesn’t seem so simple as they advertise. Seemed to me like a direct bolt on and go so I’m glad I’m asking the questions now. Also I forgot to mention I did add some 20x10 wheels with the 285 square setup recently. So I guess in the end what I’m looking to do is go with the most reliable and safe setup. But it seems I should consider any other upgrades to go with it at the same time, (injectors, fuel pump etc. ) Also to give you an idea of the use the car gets it’s a 2020 and it only has 7,500 miles. Doesn’t get used nearly enough.

 

[engineermike]

You don’t need injectors or fuel pump with either kit unless you go e85 and raise the boost.

 

[matt1234!]

Oh maybe I mis understood. So 91 or 93 is fine to run on either kit? Honestly I don’t see myself raising the boost if it’s going to offer 700 + horsepower.

 

[engineermike]

Oh maybe I mis understood. So 91 or 93 is fine to run on either kit? Honestly I don’t see myself raising the boost if it’s going to offer 700 + horsepower.

Both come with 91 octane tunes.

 

[matt1234!]

Oh ok so 91 would be it. Dumb question but I run 93 in my car now. Waste of money?

 

[engineermike]

Oh ok so 91 would be it. Dumb question but I run 93 in my car now. Waste of money?

Nope. The gen3 can use all the octane and more. It really needs 95-96 to make max power even stock.

 

[Joshinator99]

Nope. The gen3 can use all the octane and more. It really needs 95-96 to make max power even stock.

Truth!

 

[matt1234!]

I’m thinking I’ll hold out till Black Friday? Do these kits go on sale?

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