j hancock Posted August 29, 2013 Share Posted August 29, 2013 My 285 hp in direct with 4.17 and 11R24.5 rubber (22" spoke) is 68-70 mph. Quote JimIt doesn't cost anything to pay attention. Link to comment https://www.bigmacktrucks.com/topic/32505-mack-bulldog-magazine-cover/page/2/#findComment-202539 Share on other sites More sharing options...
Superdog Posted August 29, 2013 Share Posted August 29, 2013 4:17's on 22" rubber and a direct trans should be good for 68 at 2100 if I remember right Quote Link to comment https://www.bigmacktrucks.com/topic/32505-mack-bulldog-magazine-cover/page/2/#findComment-202547 Share on other sites More sharing options...
2stacksuperdog Posted August 29, 2013 Share Posted August 29, 2013 On those R's the shutters look polished. Are they? and if so was it like that on all trucks? Quote Matt Link to comment https://www.bigmacktrucks.com/topic/32505-mack-bulldog-magazine-cover/page/2/#findComment-202571 Share on other sites More sharing options...
farmer52 Posted August 29, 2013 Author Share Posted August 29, 2013 It appears all the trucks have whitewall tires. Anyone else notice? Quote Ken PRR Country and Charter member of the "Mack Pack" Link to comment https://www.bigmacktrucks.com/topic/32505-mack-bulldog-magazine-cover/page/2/#findComment-202573 Share on other sites More sharing options...
j hancock Posted August 29, 2013 Share Posted August 29, 2013 Looks like it! Hadn't noticed and they are white or maybe gold? Quote JimIt doesn't cost anything to pay attention. Link to comment https://www.bigmacktrucks.com/topic/32505-mack-bulldog-magazine-cover/page/2/#findComment-202574 Share on other sites More sharing options...
Maddog13407 Posted August 29, 2013 Share Posted August 29, 2013 actually looks like a gold stripe. maybe they were special like the Magnum Superdog tires?? boy id kill for one of those old Chrome R model bumpers on those trucks! Quote Link to comment https://www.bigmacktrucks.com/topic/32505-mack-bulldog-magazine-cover/page/2/#findComment-202575 Share on other sites More sharing options...
Superdog Posted August 29, 2013 Share Posted August 29, 2013 The shutters were probably stainless.I found a set when I was sorting thru a trailer a couple months ago. Quote Link to comment https://www.bigmacktrucks.com/topic/32505-mack-bulldog-magazine-cover/page/2/#findComment-202580 Share on other sites More sharing options...
farmer52 Posted August 29, 2013 Author Share Posted August 29, 2013 Looks like it! Hadn't noticed and they are white or maybe gold?Could be gold but definitely striped. Also the Fs have dual air stacks. Quote Ken PRR Country and Charter member of the "Mack Pack" Link to comment https://www.bigmacktrucks.com/topic/32505-mack-bulldog-magazine-cover/page/2/#findComment-202582 Share on other sites More sharing options...
countryboy5487 Posted August 29, 2013 Share Posted August 29, 2013 I noticed the dual air stacks but missed the tire stripes Quote Link to comment https://www.bigmacktrucks.com/topic/32505-mack-bulldog-magazine-cover/page/2/#findComment-202587 Share on other sites More sharing options...
Superdog Posted August 29, 2013 Share Posted August 29, 2013 the dual intakes was the COE version of the hood scoop.They went to a single intake dual element air cleaner in late '75 or so 1 Quote Link to comment https://www.bigmacktrucks.com/topic/32505-mack-bulldog-magazine-cover/page/2/#findComment-202588 Share on other sites More sharing options...
farmer52 Posted August 29, 2013 Author Share Posted August 29, 2013 Wow, so much information from just a picture. Green Dash is right....much more than just a picture. 1 Quote Ken PRR Country and Charter member of the "Mack Pack" Link to comment https://www.bigmacktrucks.com/topic/32505-mack-bulldog-magazine-cover/page/2/#findComment-202590 Share on other sites More sharing options...
Maddog13407 Posted August 30, 2013 Share Posted August 30, 2013 ok, so what the heck is cmcac?? did I miss something? Quote Link to comment https://www.bigmacktrucks.com/topic/32505-mack-bulldog-magazine-cover/page/2/#findComment-202653 Share on other sites More sharing options...
j hancock Posted August 30, 2013 Share Posted August 30, 2013 CMCAC (Chassis Mounted Charge-Air Cooling)I just say the air to air thingy that's out front sometimes mounted with an a/c thingy. Quote JimIt doesn't cost anything to pay attention. Link to comment https://www.bigmacktrucks.com/topic/32505-mack-bulldog-magazine-cover/page/2/#findComment-202654 Share on other sites More sharing options...
farmer52 Posted August 30, 2013 Author Share Posted August 30, 2013 Chassic Mounted Charge Air Cooler. It is a large radiator like heat exchanger mounted in front of the radiator. Quote Ken PRR Country and Charter member of the "Mack Pack" Link to comment https://www.bigmacktrucks.com/topic/32505-mack-bulldog-magazine-cover/page/2/#findComment-202655 Share on other sites More sharing options...
rw613 Posted August 30, 2013 Share Posted August 30, 2013 Does anyone know this location? Additional info on the "Mack's 1973 Hit Parade"?ITEEL YA BOYS THAT PICTURE RIGHT THERE BRINGS TEARS TO MY EYES IM CRYING RIGHT NOW THATS THE MOST BEUTIFUL THING I EVER SAW 1 Quote Link to comment https://www.bigmacktrucks.com/topic/32505-mack-bulldog-magazine-cover/page/2/#findComment-202739 Share on other sites More sharing options...
rsb502 Posted August 30, 2013 Share Posted August 30, 2013 4:17's on 22" rubber and a direct trans should be good for 68 at 2100 if I remember right3.65's on 11R24.5's and your good for about 78@2000rpm in direct,lol I may have to swap down to some 3.86's if I keep the Superliner in its present form to get it into high gear on the interstate, right now if I had a 13 speed I could cruise all day in 12th and never hit high gear but the 9 speed makes it more difficult so I end up running like 75-78mph to get it to 1550-1600rpm where it pulls great. 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/32505-mack-bulldog-magazine-cover/page/2/#findComment-202748 Share on other sites More sharing options...
Outbehindthebarn Posted September 18, 2013 Share Posted September 18, 2013 A 285(hp) "300", ENDT-676, is a Maxidyne prior to CMCAC (Chassis Mounted Charge-Air Cooling)A true 300hp Maxidyne, EM6-300®, was the result of the addition of CMCAC in the early eighties.The 315hp "300-PLUS" (1950rpm E6-315 and 1800rpm E6-315R), sold prior to CMCAC, was a modified high-torque-rise engine for multi-speed transmissions. It didn't fall under the Maxidyne or Thermodyne branding. But given the "300-PLUS" first carried the model number ETAZ-673A (a "Thermodyne" like number) before being renamed E6-315, I can understand the confusion.The E6-250 (pre-CMCAC) and later E6-260 (with CMCAC) were marketed as Thermodynes. What model number was the 2 valve 350? 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/32505-mack-bulldog-magazine-cover/page/2/#findComment-207015 Share on other sites More sharing options...
Superdog Posted September 18, 2013 Share Posted September 18, 2013 The really early ones were ENDT678,but that was shortlived and they were called E6-350 Quote Link to comment https://www.bigmacktrucks.com/topic/32505-mack-bulldog-magazine-cover/page/2/#findComment-207031 Share on other sites More sharing options...
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