New 300 SRT-8 dyno pics

New 2005 300C SRT-8. He brought the doughnuts, so he was first in line! His car is bone-stock and made a whopping 367.2 RWHP and 353.9 RWTQ - or roughly 459 flywheel horsepower!

holy shit

damn... what motor is in that?

Damn impressive. Go Mopar! :-D

damn :uh oh:

awesome car, i would love to own one

isnt that the new 6.1L hemi

GTSpartan said:

New 2005 300C SRT-8. He brought the doughnuts, so he was first in line! His car is bone-stock and made a whopping 367.2 RWHP and 353.9 RWTQ - or roughly 459 flywheel horsepower!

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How much does that beast way? like 5000 lbs?

96BlackSnake said:

How much does that beast way? like 5000 lbs?

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4190# Not too bad

GTSpartan said:

New 2005 300C SRT-8. He brought the doughnuts, so he was first in line! His car is bone-stock and made a whopping 367.2 RWHP and 353.9 RWTQ - or roughly 459 flywheel horsepower!

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actually thats about 430 flywheel hp

Handles great too!! Ive known for some time this engine was underrated, but damn not this much!!

I would pick my kids up anyday in that thing,but until I do have kids I will stick with a real sports car

or 440 hp with a 20 percent drive train loss for being an automatic... (ive seen a lot of autos lose about 20 percent, so I just used 20 percent).. Also, it might be even more since those are 20 inch wheels...

Cobra4pt6 said:

actually thats about 430 flywheel hp

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bbp42d said:

holy shit

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That's what I said!

smakm2k4 said:

or 440 hp with a 20 percent drive train loss for being an automatic... (ive seen a lot of autos lose about 20 percent, so I just used 20 percent).. Also, it might be even more since those are 20 inch wheels...

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Doesn't matter, all that matters is that WHP because that's what you are getting to use.

6.1L 426ci OHV N/A V8
10.3CR

Thats the Hemi motor correct? Thats fuggin BAAD!

Yep, 426 Hemi. COmplete with orange-painted engine block and black valve covers. Not too shabby

Not bad for a family sedan, looks sharp too....

Cobra4pt6 said:

actually thats about 430 flywheel hp

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Actually, that's about 459 flywheel horsepower exactly. Automatic transmission equals roughly 20% driveline loss. The correct way to figure ANY dyno estimate is to DIVIDE the rear wheel horsepower to come up with the flywheel horsepower using the "opposite" (sorry, not a math major) number from the expected loss. Example:

Expected driveline loss on an automatic: 20% or .20
Flywheel horsepower then equals RWHP divided by .80

So if a Mustang is making 300 horsepower at the rear wheels in an automatic (20% driveline loss), it would look like this:

300 / .80 = 375 HP at the crank

Don't believe it? Then take 375 x 20% (75) and subtract it = 300.

Thus 367.2 / .80 = 459.0 (and 459 x 20% = 91.8; 459 - 91.8 = 367.2)

If your average 5-speed loses 15% on a rear-wheel-drive car, then you would divide the RWHP/RWTQ by .85

And don't take it from me: This came straight from the guys that dyno'ed the SRT-8 pictured above - and they are a MUSTANG tuner. Our thanks to Doug Levin Motorsports for sponsoring this dyno - even the SRT-8 came away with a trophy! To show you that I am not meaning to give you a hard time, here is the dyno chart for that same SRT-8. Glad you guys liked the picture I shot above, and have a good one...



BTW, the 6.1 liter Hemi is rated at 425 HP, so this was a nice surprise...