Brvess Posted December 12, 2012 Share Posted December 12, 2012 This is for anyone not happy with their power from the newer mack engines. I have a 05 chn with the 427 13 speed roadranger 4.11 rears and tall rubber and it was sick. We installed 20% over injectors from Rochester fuel injection and made it run much better. Brad was very easy to deal with and recommend him to everyone. The pyro is not reading to hot and have gained around 5 mph on the hills fuel economy will suffer a little if i really stay after it. I just wanted to put this out there for everyone because there is such a shortage of info on this sort of thing hope this helps anyone who is interested. 2 Quote Link to comment https://www.bigmacktrucks.com/topic/28800-aset-more-power/ Share on other sites More sharing options...
rsb502 Posted December 21, 2012 Share Posted December 21, 2012 Illinois Dyno center and a couple others will re flash your ecm to make about 100 more hp without injectors, but it aint cheap, the up side is with the mpg gains from the re flash you will pay for it in a couple months on the road. Quote "Any Society that would give up a little LIBERTY to gain a little SECURITY will Deserve Neither and LOSE BOTH" -Benjamin Franklin"If your gonna be STUPID, you gotta be TOUGH" "You cant always get what you want, but if you try sometimes you get what you need" Link to comment https://www.bigmacktrucks.com/topic/28800-aset-more-power/#findComment-152387 Share on other sites More sharing options...
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