maxidyne237 Posted January 19, 2015 Share Posted January 19, 2015 Under hood air diverted air cleaner 2 Quote Link to comment https://www.bigmacktrucks.com/topic/771-r-model-hood-scoops/page/2/#findComment-275062 Share on other sites More sharing options...
Popular Post j hancock Posted January 19, 2015 Popular Post Share Posted January 19, 2015 The hood scoop air goes to the charge air cooler.One duct to the air cleaner goes to the turbo. The second duct picks up warm air from under hood for the engine which was popular in cold climates. 4 Quote JimIt doesn't cost anything to pay attention. Link to comment https://www.bigmacktrucks.com/topic/771-r-model-hood-scoops/page/2/#findComment-275063 Share on other sites More sharing options...
Outbehindthebarn Posted January 19, 2015 Share Posted January 19, 2015 Thanks for clearing that up Jim.The picture I posted claims to have a 300+ (Its been on Craigslist off and on) mated to a six speed. I thought those 300+'s were all mated with "multi-speed" transmission..... 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/771-r-model-hood-scoops/page/2/#findComment-275071 Share on other sites More sharing options...
Green Dash Posted January 19, 2015 Share Posted January 19, 2015 The hood scoop air goes to the charge air cooler.One duct to the air cleaner goes to the turbo. The second duct picks up warm air from under hood for the engine which was popular in cold climates.I thought Mack had stop using the second duct for that purpose by this time. Is it possible the hood or air cleaner are not original? I don't trust a truck with only one dog mirror, facing the wrong way to boot. Quote Jim Link to comment https://www.bigmacktrucks.com/topic/771-r-model-hood-scoops/page/2/#findComment-275079 Share on other sites More sharing options...
Superdog Posted January 20, 2015 Share Posted January 20, 2015 Thanks for clearing that up Jim.The picture I posted claims to have a 300+ (Its been on Craigslist off and on) mated to a six speed. I thought those 300+'s were all mated with "multi-speed" transmission.....Most likely another victim of misinformation. If I had a dollar for every ENDT676 that was claimed by either the owner or driver to be a 300+,I would be able to throw away half a dozen payment books. Sometimes I think that truck owners told their drivers that they had 300+'s to make them feel like they had more than they did. 1 Quote Link to comment https://www.bigmacktrucks.com/topic/771-r-model-hood-scoops/page/2/#findComment-275082 Share on other sites More sharing options...
ranchhopper Posted January 20, 2015 Share Posted January 20, 2015 I remember when the old ford trucks had them too when they started putting cat diesels into them. 1 Quote Link to comment https://www.bigmacktrucks.com/topic/771-r-model-hood-scoops/page/2/#findComment-275087 Share on other sites More sharing options...
j hancock Posted January 20, 2015 Share Posted January 20, 2015 Under hood engine air intake was an available option on trucks after the tip turbine system went away. Quote JimIt doesn't cost anything to pay attention. Link to comment https://www.bigmacktrucks.com/topic/771-r-model-hood-scoops/page/2/#findComment-275088 Share on other sites More sharing options...
Maddog13407 Posted January 20, 2015 Share Posted January 20, 2015 i have only saw that setup with the two air tubes and scoop on Canadian R models. they all seemed to have tht same air cleaner with the bigger bottom diameter than the top. some had that weird 2'' angled snorkel tube comin out of the air cleaner for some reason to. Quote Link to comment https://www.bigmacktrucks.com/topic/771-r-model-hood-scoops/page/2/#findComment-275100 Share on other sites More sharing options...
Outbehindthebarn Posted January 20, 2015 Share Posted January 20, 2015 (edited) Most likely another victim of misinformation. If I had a dollar for every ENDT676 that was claimed by either the owner or driver to be a 300+,I would be able to throw away half a dozen payment books. Sometimes I think that truck owners told their drivers that they had 300+'s to make them feel like they had more than they did.300+'s weren't real common, is that right? I did a little reading on them, and they were somehow linked to California??? Emissions or something? Edited January 20, 2015 by RealDiehl 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/771-r-model-hood-scoops/page/2/#findComment-275150 Share on other sites More sharing options...
b61mack Posted January 20, 2015 Share Posted January 20, 2015 I know my B 61 with the 300+ wouldn't pass California emission, or any emission for that matter. Quote Link to comment https://www.bigmacktrucks.com/topic/771-r-model-hood-scoops/page/2/#findComment-275188 Share on other sites More sharing options...
85snowdog Posted January 21, 2015 Share Posted January 21, 2015 I wasn't sure if some might find this interesting. This is a pic of the dash valve for the under hood air intake. Normal, draws air from the top of the air cleaner. Rain or snow, draws air from under the hood. 1 Quote Keith Link to comment https://www.bigmacktrucks.com/topic/771-r-model-hood-scoops/page/2/#findComment-275214 Share on other sites More sharing options...
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