Custom HP vs Factory HP 707 - Dodge Challenger Forum: Challenger & SRT8 Forums
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post #1 of 41 (permalink) Old 07-01-2014, 06:38 PM Thread Starter
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Custom HP vs Factory HP 707

Hello Everyone, I have a question. With the new 2015 challengers rolling out and especially the BEAUTIFUL Hellcat SRT, everyone is raving about the 707 HP its going to have. My question is would it be possible and more cost effective to upgrade an RT from the 375 to the 700 using a supercharger and a bunch of other parts (exhausts, headers, tune, etc... or would just buying the Hellcat version be better. I dont know what Supercharger would be able to get the numbers that high and how much it would cost. I am assuming that the new Hellcat will cost anywhere between 65 and 70k. A fully loaded RT according to the 2014 cost would be about 40K. Also if it is possible to get it to 700HP or so, what parts would be needed to add to a stock RT

What do you guys think?

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post #2 of 41 (permalink) Old 07-01-2014, 06:45 PM
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Hello Everyone, I have a question. With the new 2015 challengers rolling out and especially the BEAUTIFUL Hellcat SRT, everyone is raving about the 707 HP its going to have. My question is would it be possible and more cost effective to upgrade an RT from the 375 to the 700 using a supercharger and a bunch of other parts (exhausts, headers, tune, etc... or would just buying the Hellcat version be better. I dont know what Supercharger would be able to get the numbers that high and how much it would cost. I am assuming that the new Hellcat will cost anywhere between 65 and 70k. A fully loaded RT according to the 2014 cost would be about 40K. Also if it is possible to get it to 700HP or so, what parts would be needed to add to a stock RT

What do you guys think?
Not sure about the cost of upping an R/T to that kind of HP...but two things to keep in mind if it's possible for the money:

1) If you manage to get 700+ HP out of the 5.7, pretty much the only warranty you'd have left would be on the cupholders

2) Unless you're paying cash for the cars (which I'm not rich, so I've never done), you can Finance a Hellcat...and while you could finance the base R/T, you'd have to come up with cash for the $30K worth of performance parts.

Even if it would be possible (not enough of a mechanic to say yes or no to that), the Warranty issues alone would keep me from doing it.


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post #3 of 41 (permalink) Old 07-01-2014, 06:46 PM
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The Hellcat will run better too.
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post #4 of 41 (permalink) Old 07-01-2014, 06:48 PM
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The Hellcat will run better too.
Not to mention the suspension, chassic, transmission, and braking upgrades between the R/T and the Hellcat.
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post #5 of 41 (permalink) Old 07-01-2014, 06:52 PM
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Just my opinion, but by the time you upgraded the internals, add the supercharger, tune, exhaust, torque converter, rear axels and brakes you may be better to buy a factory hotrod. Plus the resale value down the road.


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post #6 of 41 (permalink) Old 07-01-2014, 06:52 PM Thread Starter
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This is true. it would require alot of upgrades. The cost to own a hellcat financed for 63000 that includes 3000 in rebates and discount with 4k down and assuming 70000 for car is about 951 bucks a month!!!
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post #7 of 41 (permalink) Old 07-01-2014, 06:54 PM
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If it's a daily driver, it's a no-brainer -- get the Hellcat, factory-built with a warranty.

If it's not... I'd still get the Hellcat. Eventually you'll be done with it, or you'll need to sell it. The resale value will be a lot higher with the Hellcat, and it'll be a lot easier to find a buyer.
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post #8 of 41 (permalink) Old 07-01-2014, 08:53 PM
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Tossing the same around...kinda. I'm at 600 hp (500 whp) and the Hellcat being 700 hp (600 whp) I have been planning to send my car to API for a forged 426 and a ProCharger (would yield near 900 hp, 760 whp) but at the cost of $25k it wouldn't be bad to just get a new Hellcat... I'd need to lower it a bit and put my wheels and tires on but otherwise I could drive it as is and be +100 hp.
Hmm thinking to do... depends on cost. If it's in the $70s (especially upper 70s as it's rumored) then I'm out for sure. If it's in the $60k region then I will have to consider it as an option. Would be cool to have warranty again... lol


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post #9 of 41 (permalink) Old 07-01-2014, 11:46 PM
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Hey Hemipowerv8, not to get too off topic here,but what part of Texas are you in? I am in the DFW area and always looking for gearheads to go racing with.

Danner, you ever come up to the Friday night drags at TMS?


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Last edited by 71GTX; 07-01-2014 at 11:50 PM.
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post #10 of 41 (permalink) Old 07-02-2014, 06:17 AM
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Sure, you can have an R/T up to 700 HP but the thing that many folks don't think of are the upgrades to the brakes, suspension, driveshaft, gears, transmission, tyres.... and the list goes on. If you are going to modify all parts of the car you might be looking into a price similar to the Hellcat's price (When announced of course!) or even higher. There's nothing like having a monster like this that is both reliable and dependable. The warranty is a HUGE plus with the hellcat. I'm pretty sure its World's apart when it comes to daily driving a factory hellcat or a highly modded R/T.

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Last edited by FWB; 07-02-2014 at 06:17 AM.
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