Bigmeanbaldguy Posted February 20, 2019 Share Posted February 20, 2019 I looking at a 2009 pinnacle with the MP8. Ive read that they have between 415 and 505 HP. however this one lists Max HP on the valve cover engine information plate as 338. the model is listed as a MP8-415c anyone know what this means? is it 338 HP or 415? the reason I’m asking is because it doesn’t feel nearly as powerful as my other trucks Quote Link to comment https://www.bigmacktrucks.com/topic/55759-horsepower-of-my-mp8/ Share on other sites More sharing options...
Mackpro Posted February 20, 2019 Share Posted February 20, 2019 Yours is a 415 HP. In 2009 the biggest MP8 you could get was 485. The 505 didn’t start till 2010 with the DEF/SCR engines. Quote Link to comment https://www.bigmacktrucks.com/topic/55759-horsepower-of-my-mp8/#findComment-416244 Share on other sites More sharing options...
Bigmeanbaldguy Posted February 20, 2019 Author Share Posted February 20, 2019 So then what is the 338? Quote Link to comment https://www.bigmacktrucks.com/topic/55759-horsepower-of-my-mp8/#findComment-416247 Share on other sites More sharing options...
Bigmeanbaldguy Posted February 21, 2019 Author Share Posted February 21, 2019 Every other label I’ve seen show that the engine model corresponds to the horsepower rating. like model MP8-445E has an advertised HP as 445 or model MP8-415 has advertised HP as 415 but this shows model MP8-415 with advertised HP as 338 could it be a special tune? Quote Link to comment https://www.bigmacktrucks.com/topic/55759-horsepower-of-my-mp8/#findComment-416264 Share on other sites More sharing options...
Bigmeanbaldguy Posted February 21, 2019 Author Share Posted February 21, 2019 Here is an example of how most match Quote Link to comment https://www.bigmacktrucks.com/topic/55759-horsepower-of-my-mp8/#findComment-416267 Share on other sites More sharing options...
ZDB Posted February 21, 2019 Share Posted February 21, 2019 Most likely rated HP @415 from 1300-1700 rpm with peak engine speed 383hp@2100rpm. Hp Curve falls off after 1700 Quote Link to comment https://www.bigmacktrucks.com/topic/55759-horsepower-of-my-mp8/#findComment-416276 Share on other sites More sharing options...
mp8_macky Posted July 13, 2019 Share Posted July 13, 2019 Mp8 goes from 415 to 485. 500bhp is on 2010 and up. Quote Link to comment https://www.bigmacktrucks.com/topic/55759-horsepower-of-my-mp8/#findComment-427671 Share on other sites More sharing options...
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