2015 Dodge Challenger SRT Hellcat tagged posts

Today Dodge released the fuel economy number for the 707hp 2015 Challenger SRT Hellcat. Results are:

– Challenger SRT Hellcat with 8-speed automatic transmission: 22/13/16mpg (hwy/city/combined)
– Challenger SRT Hellcat with 7-speed manual transmission: 21/13/16mpg (hwy/city/combined)

Next, a bad news for those who want to buy this muscle car: because of the low combined fuel efficiency rating, the Challenger Hellcat will trigger the Federal Gas Guzzler Tax. Based on the 16mpg combined rating (falls in the “>= 15.5mpg, <16.5mpg” bracket), the gas guzzler tax will be $3,700 for the 2015 Challenger SRT Hellcat...

For the new engine in the 2015 Challenger SRT Hellcat, the supercharger supplier is not Eaton (which is famous for the Eaton TVS used on the Audi 3.0 V6 engine). Instead it is an twin screw supercharger from IHI.

The IHI supercharger has similar efficiency with the Eaton TVS roots-type superchargers, but it has a significant higher operation noise level, which I think is not a problem for the purpose of Challenger anyway – because the Challenger is not designed for luxury car purpose. And also I guess the invoice that IHI is quoting Chrysler may be lower than Eaton.

After the supercharger there is a huge pressure stabilization chamber similar to a naturally aspirated e...

For those who are interested in the Dodge Challenger models which has over 400hp, now there are three choices:

1. The Challenger SRT;
2. The Challenger Scat Pack, or Shaker trim with the 6.4L V8 option;
3. The Challenger SRT Hellcat with supercharged 6.2L V8.

We have covered #1 and #2 in our previous article. Below is some highlights about the newly revealed SRT Hellcat:

– Supercharged 6.2L V8 engine outputs more than 600hp;

– Can be paired to a 6-speed manual transmission or an 8-speed ZF-sourced automatic transmission;

– Forged-steel crankshaft with induction-hardened bearing surfaces designed for firing pressures around 1,595 psi; with crank damper designed to handle 1...