ducky698 Posted April 13, 2010 Share Posted April 13, 2010 Hi all, what size exhaust would be best for power on an 866?it will come out of turbo and be single to under cab where it will split into 2 then go up cab either side. regards Grant Quote Link to comment https://www.bigmacktrucks.com/topic/13417-866-exhaust/ Share on other sites More sharing options...
Rob Posted April 13, 2010 Share Posted April 13, 2010 Hi all, what size exhaust would be best for power on an 866?it will come out of turbo and be single to under cab where it will split into 2 then go up cab either side. regards GrantHi Grant, both of mine use 5 inch exhaust. One is single stack, the other splits as you propose.Rob Quote Plodding along with no job nor practical application for my existence, but still trying to fix what's broke. Link to comment https://www.bigmacktrucks.com/topic/13417-866-exhaust/#findComment-53020 Share on other sites More sharing options...
BAD DOG Posted April 13, 2010 Share Posted April 13, 2010 I had 5 inch out of the turbo through the Y pipe then ran 6 inch staight pipes, no mufflers. Quote Link to comment https://www.bigmacktrucks.com/topic/13417-866-exhaust/#findComment-53029 Share on other sites More sharing options...
ducky698 Posted April 13, 2010 Author Share Posted April 13, 2010 I had 5 inch out of the turbo through the Y pipe then ran 6 inch staight pipes, no mufflers.hi, that must have been loud. i dont think i will go that big, i was tossing up between 4 an 5 inch, i am unsure what way to rout it as well.do they like some back pressure or do they like straight thru, whats best on these engines for there performance?Grant Quote Link to comment https://www.bigmacktrucks.com/topic/13417-866-exhaust/#findComment-53032 Share on other sites More sharing options...
BAD DOG Posted April 14, 2010 Share Posted April 14, 2010 :SMOKIE-LFT:It was actually quieter with 6" straight pipes than it was when I had it all in 5" wiith 2 resonator mufflers on it. I don't think backpressure is needed with them , I found it better without backpressue. Quote Link to comment https://www.bigmacktrucks.com/topic/13417-866-exhaust/#findComment-53036 Share on other sites More sharing options...
ducky698 Posted April 14, 2010 Author Share Posted April 14, 2010 :SMOKIE-LFT:It was actually quieter with 6" straight pipes than it was when I had it all in 5" wiith 2 resonator mufflers on it. I don't think backpressure is needed with them , I found it better without backpressue.Hi, interesting, will have to see how much room is under cab, i have lifted it up a bit now and just working out where to run the pipes. hey Rob how much room you got at your place?Grant Quote Link to comment https://www.bigmacktrucks.com/topic/13417-866-exhaust/#findComment-53060 Share on other sites More sharing options...
Rob Posted April 14, 2010 Share Posted April 14, 2010 Hi, interesting, will have to see how much room is under cab, i have lifted it up a bit now and just working out where to run the pipes. hey Rob how much room you got at your place?GrantHi Grant, I have plenty of outside storage available. What were you needing from this part of the world?Rob Quote Plodding along with no job nor practical application for my existence, but still trying to fix what's broke. Link to comment https://www.bigmacktrucks.com/topic/13417-866-exhaust/#findComment-53064 Share on other sites More sharing options...
ducky698 Posted April 15, 2010 Author Share Posted April 15, 2010 Hi Grant, I have plenty of outside storage available. What were you needing from this part of the world?RobHello, slowly starting to pack here to move there. am looking for some where to put the mack until we find a decent place as its coming over to. we may have a place before it arrives but just in case. it would probly be the only triple roadtrain rated ttrick over there Grant Quote Link to comment https://www.bigmacktrucks.com/topic/13417-866-exhaust/#findComment-53082 Share on other sites More sharing options...
Rob Posted April 15, 2010 Share Posted April 15, 2010 Hello, slowly starting to pack here to move there. am looking for some where to put the mack until we find a decent place as its coming over to. we may have a place before it arrives but just in case. it would probly be the only triple roadtrain rated ttrick over there GrantNo problem at all if you want to store it here. As I said plenty of room. Are you going to replace the cab for the steering wheel arrangement or leave it as is? You sure went through a lot of work to convert it to go back. Whatever you need to do let me know.Rob Quote Plodding along with no job nor practical application for my existence, but still trying to fix what's broke. Link to comment https://www.bigmacktrucks.com/topic/13417-866-exhaust/#findComment-53090 Share on other sites More sharing options...
ducky698 Posted April 15, 2010 Author Share Posted April 15, 2010 No problem at all if you want to store it here. As I said plenty of room. Are you going to replace the cab for the steering wheel arrangement or leave it as is? You sure went through a lot of work to convert it to go back. Whatever you need to do let me know.RobHello, no worries, thankyou. will leave it right hand drive, dont want to put the steering wheel on the wrong side I have a ford coupe in storage there all ready, will be looking for somewhere in Dupage county for now, am also bringing a Ford ute over aswell.Grant Quote Link to comment https://www.bigmacktrucks.com/topic/13417-866-exhaust/#findComment-53127 Share on other sites More sharing options...
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