m5040 Posted August 12, 2009 Share Posted August 12, 2009 I have a 1984 2 valve, air to air 275 HP EM6. A couple of local guys have used Jakes and Dynatards. Considering relieability, performance and simplicity, which do you think would be best for a hobby dump truck that will haul stuff around at times ? Quote Link to comment https://www.bigmacktrucks.com/topic/10309-dynatard-vs-jake-brake-which-is-better-for-a-2-vlv/ Share on other sites More sharing options...
maxidyne237 Posted August 12, 2009 Share Posted August 12, 2009 A jacobs has better braking force over a dynatard but if the truck had a dynatard on it i would not replace it. If you could come up with a dynatard cheap i would also use it. I think by 84 all the trucks had dynatard camshafts but you need to see by engine number first before install. If i was going to install a new brake buy a tek brake, jacobs doesnt make a 2 valve brake anymore Quote Link to comment https://www.bigmacktrucks.com/topic/10309-dynatard-vs-jake-brake-which-is-better-for-a-2-vlv/#findComment-38992 Share on other sites More sharing options...
m5040 Posted August 12, 2009 Author Share Posted August 12, 2009 Thanks, the dynatard seems like a cleaner installation, since it doesn't use the extra spacers and afterall, dynatard = Mack...(doesn't kill the engine when you let out the clutch either) Quote Link to comment https://www.bigmacktrucks.com/topic/10309-dynatard-vs-jake-brake-which-is-better-for-a-2-vlv/#findComment-39006 Share on other sites More sharing options...
theakerstwo Posted August 13, 2009 Share Posted August 13, 2009 I know were a complete jake unit for a 2 valve for 600.00. Quote glenn akers Link to comment https://www.bigmacktrucks.com/topic/10309-dynatard-vs-jake-brake-which-is-better-for-a-2-vlv/#findComment-39016 Share on other sites More sharing options...
fjh Posted August 13, 2009 Share Posted August 13, 2009 I know were a complete jake unit for a 2 valve for 600.00.The easz of install would be to go with Glens jake set up being you don't know with what cam the engine was built with.The dynatard is a clean install But you need valve covers rocker shafts and push tubes.If ya have an after cooler there is an adapter for that as well. Quote Link to comment https://www.bigmacktrucks.com/topic/10309-dynatard-vs-jake-brake-which-is-better-for-a-2-vlv/#findComment-39018 Share on other sites More sharing options...
m5040 Posted August 13, 2009 Author Share Posted August 13, 2009 Thanks for the info. I will keep it in mind about the $600 Jake, I was told there are 2 different size spacers for the valve stems, do you know what size yours comes with ?I will probably steam clean the top of the engine and pull the covers within the next couple of weeks. Quote Link to comment https://www.bigmacktrucks.com/topic/10309-dynatard-vs-jake-brake-which-is-better-for-a-2-vlv/#findComment-39049 Share on other sites More sharing options...
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