Ed45 Posted October 1, 2018 Share Posted October 1, 2018 Is my 427,13sp, 4.42 a good setup for pulling gravel trains here in mi. Can I get more power out of my 427? Quote Link to comment https://www.bigmacktrucks.com/topic/54450-e7-427-pulling-power/ Share on other sites More sharing options...
Mack Technician Posted October 1, 2018 Share Posted October 1, 2018 I’d vote yes. If it’s a Mack trans knock the pin out of the shift knob so you have an 18 speed. If you can’t make hills change up injectors as a quick’n easy. Quote Link to comment https://www.bigmacktrucks.com/topic/54450-e7-427-pulling-power/#findComment-407025 Share on other sites More sharing options...
Ed45 Posted October 2, 2018 Author Share Posted October 2, 2018 Yep, it's all Mack. How do I make that trans an 18sp? Quote Link to comment https://www.bigmacktrucks.com/topic/54450-e7-427-pulling-power/#findComment-407042 Share on other sites More sharing options...
fjh Posted October 2, 2018 Share Posted October 2, 2018 1 minute ago, Ed45 said: Yep, it's all Mack. How do I make that trans an 18sp? There is a lock out pin in the shift knob on the range lever remove it! Quote Link to comment https://www.bigmacktrucks.com/topic/54450-e7-427-pulling-power/#findComment-407043 Share on other sites More sharing options...
Mack Technician Posted October 2, 2018 Share Posted October 2, 2018 Take the shift knob off, disassemble it and you will see a little plastic stud that blocks your thumb splitter from moving when range lever is down. Cut off the little blocker tit and your low gears will all have a split too. Quote Link to comment https://www.bigmacktrucks.com/topic/54450-e7-427-pulling-power/#findComment-407044 Share on other sites More sharing options...
Ed45 Posted October 2, 2018 Author Share Posted October 2, 2018 Thanks for that info. I see 460's are putting out around 480hp . Is it the same for 427's being underrated also? Quote Link to comment https://www.bigmacktrucks.com/topic/54450-e7-427-pulling-power/#findComment-407045 Share on other sites More sharing options...
Mack Technician Posted October 2, 2018 Share Posted October 2, 2018 No, your a true 427, no secret power bands there. What is your GVW going to be loaded? Quote Link to comment https://www.bigmacktrucks.com/topic/54450-e7-427-pulling-power/#findComment-407059 Share on other sites More sharing options...
Ed45 Posted October 2, 2018 Author Share Posted October 2, 2018 154000, gravel trains Quote Link to comment https://www.bigmacktrucks.com/topic/54450-e7-427-pulling-power/#findComment-407060 Share on other sites More sharing options...
Mack Technician Posted October 2, 2018 Share Posted October 2, 2018 That’s too much for your truck. You need to move out of 12 liter class Mack or Volvo into big displacement and drivetrain. Guys I know hauling 98k get away with 427, but your in a different bracket. Quote Link to comment https://www.bigmacktrucks.com/topic/54450-e7-427-pulling-power/#findComment-407063 Share on other sites More sharing options...
HeavyGunner Posted October 2, 2018 Share Posted October 2, 2018 13 hours ago, Mack Technician said: Take the shift knob off, disassemble it and you will see a little plastic stud that blocks your thumb splitter from moving when range lever is down. Cut off the little blocker tit and your low gears will all have a split too. Why didn’t Mack just make it an 18spfrom the get go? 1 Quote The problems we face today exist because the people who work for a living are outnumbered by the people who vote for a living.The government can only "give" someone what they first take from another. Link to comment https://www.bigmacktrucks.com/topic/54450-e7-427-pulling-power/#findComment-407065 Share on other sites More sharing options...
Ed45 Posted October 2, 2018 Author Share Posted October 2, 2018 Factory specs say it was an 18sp. Who ever had it before me made it a 13. It is a full mi special. Double frame and all. It's old 13000 gallon 6 axle tanker hauler. Quote Link to comment https://www.bigmacktrucks.com/topic/54450-e7-427-pulling-power/#findComment-407066 Share on other sites More sharing options...
Ed45 Posted October 2, 2018 Author Share Posted October 2, 2018 So basically even with the 4.42, 44camelbacks it too much for that e7? Quote Link to comment https://www.bigmacktrucks.com/topic/54450-e7-427-pulling-power/#findComment-407067 Share on other sites More sharing options...
Outbehindthebarn Posted October 2, 2018 Share Posted October 2, 2018 3 hours ago, Ed45 said: 154000, gravel trains You need an E9. 1 Quote Fun is what they fine you for!My name is Bob Buckman sir,. . . and I hate truckers. Link to comment https://www.bigmacktrucks.com/topic/54450-e7-427-pulling-power/#findComment-407068 Share on other sites More sharing options...
Ed45 Posted October 2, 2018 Author Share Posted October 2, 2018 Yep I had an 85 superliner with 425cat,15sp ,4.56 and it pulled like crazy over 180,000(not legal of course). Cubic inches make the difference I guess! Quote Link to comment https://www.bigmacktrucks.com/topic/54450-e7-427-pulling-power/#findComment-407069 Share on other sites More sharing options...
Maxidyne Posted October 2, 2018 Share Posted October 2, 2018 You have to remember that at 154k pounds (70tons) your hauling almost twice the weight of the standard 80K pound rigs. That means to get the same lever of performance, you'll need almost twice the horsepower and torque. It'll move that gravel train at about the pace of a 237 Maxidyne at 80k pounds, except it'll have half the engine braking and you'll have to shift twice as much. so I'll concur that for the loads you want to haul you need a 15-16 liter engine with as much torque and horsepower as possible. Quote Link to comment https://www.bigmacktrucks.com/topic/54450-e7-427-pulling-power/#findComment-407071 Share on other sites More sharing options...
Ed45 Posted October 2, 2018 Author Share Posted October 2, 2018 Thanks for the reply. Looks like I will be selling it or trading it in over the winter if I cant find a quad or 5axle to put it under Quote Link to comment https://www.bigmacktrucks.com/topic/54450-e7-427-pulling-power/#findComment-407072 Share on other sites More sharing options...
Popular Post Mack Technician Posted October 2, 2018 Popular Post Share Posted October 2, 2018 1 hour ago, HeavyGunner said: Why didn’t Mack just make it an 18spfrom the get go? Sales pitch. It gives the appearance of offering more options. In their defense....not really underhanded. To our advantage...…..costs nothing to modify. Only thing that looks a little off is the plastic thumb switch color, they made a gray and a red so you could visually see what trans config it had. 2 1 Quote Link to comment https://www.bigmacktrucks.com/topic/54450-e7-427-pulling-power/#findComment-407073 Share on other sites More sharing options...
Mack Technician Posted October 2, 2018 Share Posted October 2, 2018 (edited) Michigan trains are awesome, make sure you tack on a pic when you get established. We used to have a MI group (hmmmmaybe Mitch Dellich?) that dipped down from the UP once a year to have a "fix everything you can find wrong" week. Those guys had "centipedes" that ran Cummins ISX, High Torque 18 Spd, in a Mack CL733 with factory Raydan Air-Link Suspensions, real meat wagons. We had to rebush some of the main trunnions, but generally speaking they could take it, never saw a base metal crack. Mack isn't(wasn't) out of the game, you just need to take advantage of the most they have to offer. Edited October 2, 2018 by Mack Technician Quote Link to comment https://www.bigmacktrucks.com/topic/54450-e7-427-pulling-power/#findComment-407075 Share on other sites More sharing options...
Ed45 Posted October 2, 2018 Author Share Posted October 2, 2018 Will do Mack Tech! I figure I will put some larger injectors in it or a 460 program from Mack for now and make the most of it. As long as I can get 60 or 65mph out of it. I really like my dog. I already have a 9900 isx500,18sp,3.90. I want to make my dog a working show truck. Quote Link to comment https://www.bigmacktrucks.com/topic/54450-e7-427-pulling-power/#findComment-407081 Share on other sites More sharing options...
Mack Technician Posted October 3, 2018 Share Posted October 3, 2018 Sorry. Don’t mistake my statement as an encouragement. I mean to say Mack made a truck that could do it, but you may be the knife at a gunfight with your current set-up, even modified. Barn is making the point of a right fit, Mack E9, ISX, etc (most Mack has to offer). Quote Link to comment https://www.bigmacktrucks.com/topic/54450-e7-427-pulling-power/#findComment-407082 Share on other sites More sharing options...
Ed45 Posted October 3, 2018 Author Share Posted October 3, 2018 I understand 100%. I already pull them with my 9900i. Definitely not going to a gunfight with a knife for sure. You would be surprised how many guys are still running trains and 8axle flowboys with 355/380 Mack's. Most of them run in a 50 mile radius around Detroit where it is all flat ground. I'm looking to purchase a 5 axle dump over the winter to put it under. 1 Quote Link to comment https://www.bigmacktrucks.com/topic/54450-e7-427-pulling-power/#findComment-407086 Share on other sites More sharing options...
brettj3876 Posted November 6, 2018 Share Posted November 6, 2018 On 10/1/2018 at 6:55 PM, Mack Technician said: I’d vote yes. If it’s a Mack trans knock the pin out of the shift knob so you have an 18 speed. If you can’t make hills change up injectors as a quick’n easy. Go to Rochester and get a blixxton for 1200 they claim about 30-35% increase for power plus the sell stage 1-3 injectors and a bigger turbo kit Quote Link to comment https://www.bigmacktrucks.com/topic/54450-e7-427-pulling-power/#findComment-409004 Share on other sites More sharing options...
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