dragonslayerpa1 Posted March 18, 2011 Share Posted March 18, 2011 Hi Guys.. I have a 1985 rd 685 triaxle with a 300 engine i have a lot of blow by from the engine and no idea how many miles is on the motor,, i am going to rebuild the motor this spring and was looking for more power.. can i get a kit with bigger pistons and tubes that will give me more horse power..I have installed a 350 pump turbo and injectors on the engine but still not enough pulling power.dragonslayerpa1@yahoo.comThanks Quote Link to comment https://www.bigmacktrucks.com/topic/18381-engine-rebuild-help/ Share on other sites More sharing options...
Rob Posted March 18, 2011 Share Posted March 18, 2011 Hi Guys.. I have a 1985 rd 685 triaxle with a 300 engine i have a lot of blow by from the engine and no idea how many miles is on the motor,, i am going to rebuild the motor this spring and was looking for more power.. can i get a kit with bigger pistons and tubes that will give me more horse power..I have installed a 350 pump turbo and injectors on the engine but still not enough pulling power.dragonslayerpa1@yahoo.comThanksA fresh engine will help without a doubt and using a properly calibrated pump, injectors, and turbocharger is about all you can do with an E6 series engine and it live a long life. 350 horse is about all you want to go. If you install a mechanical E7 series, the power can gained can be much greater.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/18381-engine-rebuild-help/#findComment-74574 Share on other sites More sharing options...
theakerstwo Posted March 18, 2011 Share Posted March 18, 2011 Like Rob said. Also what trans you got makes some difference. I would be carefull with the 350 fuel setting if its only a 6 speed. But if a 9 or 10 speed then go for it. I would not go any more than the 350. Thanks Rob and Barry for getting me back on the site. Quote glenn akers Link to comment https://www.bigmacktrucks.com/topic/18381-engine-rebuild-help/#findComment-74577 Share on other sites More sharing options...
b61mack Posted March 19, 2011 Share Posted March 19, 2011 Hi Guys.. I have a 1985 rd 685 triaxle with a 300 engine i have a lot of blow by from the engine and no idea how many miles is on the motor,, i am going to rebuild the motor this spring and was looking for more power.. can i get a kit with bigger pistons and tubes that will give me more horse power..I have installed a 350 pump turbo and injectors on the engine but still not enough pulling power.dragonslayerpa1@yahoo.comThanksAre you sure you have a 300,the 685 was a 237. the 686 was a 285-300. maybe someone changed the engine,the 85 300 had a charge air cooler in front of the raditor, if it is a 237 the rods may not be heavy enought for 350hp. Ron Quote Link to comment https://www.bigmacktrucks.com/topic/18381-engine-rebuild-help/#findComment-74580 Share on other sites More sharing options...
Rob Posted March 19, 2011 Share Posted March 19, 2011 Like Rob said. Also what trans you got makes some difference. I would be carefull with the 350 fuel setting if its only a 6 speed. But if a 9 or 10 speed then go for it. I would not go any more than the 350. Thanks Rob and Barry for getting me back on the site.Good to hear from you again. Was wondering how you were doing.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/18381-engine-rebuild-help/#findComment-74582 Share on other sites More sharing options...
dragonslayerpa1 Posted March 20, 2011 Author Share Posted March 20, 2011 Hey thanks for the answers guys.. and yes it has the charge air cooler and it has a 13 over tranny.. again thanks for the inputGary Quote Link to comment https://www.bigmacktrucks.com/topic/18381-engine-rebuild-help/#findComment-74627 Share on other sites More sharing options...
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