wrenching4life Posted August 3, 2015 Share Posted August 3, 2015 Hey all I have a 1989 rw713 with the 450 E9 right now the engine brake is on or off is it possible to make it a high, low and off? It seems there is a wire runnin to each head those would be the engine brake wires correct? Thanks all Quote Link to comment https://www.bigmacktrucks.com/topic/41199-e9-engine-brakehigh-and-low/ Share on other sites More sharing options...
j_martell Posted August 3, 2015 Share Posted August 3, 2015 I would bet yes. while i am not familar with the v8's (tho id like to be ), not sure if the internal balance would allow for 1/2 brake. What does the switch have on it, ON and OFF? Quote Lack of planning on your part does not constitute an emergency on my part.... Link to comment https://www.bigmacktrucks.com/topic/41199-e9-engine-brakehigh-and-low/#findComment-298835 Share on other sites More sharing options...
gearhead204 Posted August 3, 2015 Share Posted August 3, 2015 I would be happy with a EXTRA HIGH SETTING my self! as for the balance of the engine i would think if you did either both front heads or either rear heads it would work. a person should study the firing order to make sure the gap is fairly even between canceled cylinders. Quote Link to comment https://www.bigmacktrucks.com/topic/41199-e9-engine-brakehigh-and-low/#findComment-298842 Share on other sites More sharing options...
rsb502 Posted August 3, 2015 Share Posted August 3, 2015 They are built with just onnoff but I know it has been put on a three position switch and two relays before. If I remember right it was the front right head and the back left head on low and all four on high. Seems to me like putting it on two heads across from each other would be easier on the crank. 1 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/41199-e9-engine-brakehigh-and-low/#findComment-298890 Share on other sites More sharing options...
wrenching4life Posted August 18, 2015 Author Share Posted August 18, 2015 That is what I was thinking, I'd be intersted if anyone has done this or has a truck with a high and low, or if I could come up with a wiring diagram Quote Link to comment https://www.bigmacktrucks.com/topic/41199-e9-engine-brakehigh-and-low/#findComment-300539 Share on other sites More sharing options...
e9500v8 Posted August 21, 2015 Share Posted August 21, 2015 Sent from my iPhone using Tapatalk Quote Link to comment https://www.bigmacktrucks.com/topic/41199-e9-engine-brakehigh-and-low/#findComment-300901 Share on other sites More sharing options...
e9500v8 Posted August 21, 2015 Share Posted August 21, 2015 I built this to test each head you can turn each head on and off. I had one head not working under load. This really helped me find which one it was. Sent from my iPhone using Tapatalk Quote Link to comment https://www.bigmacktrucks.com/topic/41199-e9-engine-brakehigh-and-low/#findComment-300902 Share on other sites More sharing options...
wrenching4life Posted March 20, 2016 Author Share Posted March 20, 2016 So would I be able to make the front two heads work together on a switch and then make another switch for the rear heads? so if I turn both switches on its FULL and only one switch is HALF? it would make sense but I am not sure if it would put to much stress on the crank. Quote Link to comment https://www.bigmacktrucks.com/topic/41199-e9-engine-brakehigh-and-low/#findComment-327988 Share on other sites More sharing options...
thomastractorsvc Posted March 20, 2016 Share Posted March 20, 2016 How would it be more stress on the crank vs under power? A engine is nothing more than an air pump and turning a head/into an air compressor without combustion is hard on the crank, Why? I know some of the older trailer mounted commercial air compressors used 6 and 8 cylinder gas and deisel engines that ran on half and made air with the others. I think it was grimmerschmidt that made some sort of air powered tractor also used for drilling Quote Robert"I reject your reality and substitute my own." Link to comment https://www.bigmacktrucks.com/topic/41199-e9-engine-brakehigh-and-low/#findComment-328010 Share on other sites More sharing options...
Underdog Posted March 20, 2016 Share Posted March 20, 2016 I don't know why you would want to cut a dynatard down in half. Not much braking power to begin with. If I want more, usually I hold my hat out the window. 1 Quote Link to comment https://www.bigmacktrucks.com/topic/41199-e9-engine-brakehigh-and-low/#findComment-328012 Share on other sites More sharing options...
fjh Posted March 21, 2016 Share Posted March 21, 2016 2 hours ago, Underdog said: I don't know why you would want to cut a dynatard down in half. Not much braking power to begin with. If I want more, usually I hold my hat out the window. What HE Said! 1 Quote Link to comment https://www.bigmacktrucks.com/topic/41199-e9-engine-brakehigh-and-low/#findComment-328021 Share on other sites More sharing options...
theakerstwo Posted March 21, 2016 Share Posted March 21, 2016 I have a jake brake and one with dnyotard and I like the dnytard better on a E6 because its faster to come on.But I have said it before for braking you have as good braking if you open both doors with the window rolled up.Use your imagination some. Quote glenn akers Link to comment https://www.bigmacktrucks.com/topic/41199-e9-engine-brakehigh-and-low/#findComment-328023 Share on other sites More sharing options...
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