Lmackattack Posted January 31, 2006 Share Posted January 31, 2006 Hood scoops.I have seen a few R models with the rearward facing scoop placed just over the turbo. was that an option or was used on specific models. I assume it is to remove the heat produced from the turbo and help air flow over it?? I have seen them on R600s, 700s U models, and DMs just wondering the reason behind them..another thing I have seen diffrent on Rs was on my friends RS700 hood with a diffrent hood line on top of the hood. He has the lines that runs along the sides of the hood and come up top behind the dog then the lines turn back towards the cab in a "V" shape and end near the top edges. I have seen Valuliners have this but never RS700s or other models. Most of the hoods I have seen just run a line across the top behing the dog to the other side.just a few observations 1 Quote Link to comment https://www.bigmacktrucks.com/topic/771-r-model-hood-scoops/ Share on other sites More sharing options...
scott Posted January 31, 2006 Share Posted January 31, 2006 under the scoop should be filter and duct that feeds air to the tip turbine. if you happen to run across a junker with that set-up i want it for my next project. scott Quote Link to comment https://www.bigmacktrucks.com/topic/771-r-model-hood-scoops/#findComment-3753 Share on other sites More sharing options...
Lmackattack Posted February 1, 2006 Author Share Posted February 1, 2006 Thats intresting scott. never saw under the hood of a R with a Hood scoop. I thought all tip turbines got air from the air cleaner from the 2nd air tube?? Thats how my tip turbine is set up.. Learn something new every day. Havent seen any in a junk yard but will keep my eyes open for one Quote Link to comment https://www.bigmacktrucks.com/topic/771-r-model-hood-scoops/#findComment-3761 Share on other sites More sharing options...
Doug Maney Posted February 1, 2006 Share Posted February 1, 2006 I believe the hood scoop lasted until frontal air cooling was introduced in 1981. I'll do a little research and verify the years they offered the hood scoop. I have been picking them up when I can, I always liked the look of them. They were used on all of the conventional models including the steel front butterfly hoods.RS, RL and Valueliners used a hood that carried the bodyline back the top of the hood toward the cab. I liked this arrangement, it allowed for some creative striping.Doug Quote Interested in Old Trucks? Check out: www.antiquetruckclubofamerica.org Link to comment https://www.bigmacktrucks.com/topic/771-r-model-hood-scoops/#findComment-3769 Share on other sites More sharing options...
MidniteMechanic Posted February 1, 2006 Share Posted February 1, 2006 My '74 RS has that same style hood. I think there pretty cool looking. Quote Link to comment https://www.bigmacktrucks.com/topic/771-r-model-hood-scoops/#findComment-3771 Share on other sites More sharing options...
b61mack Posted February 1, 2006 Share Posted February 1, 2006 I think 75 was the last year for the 285 with a hood scoop, i have a 76 285 it has the 2 pipes going to the aircleaner. Ron Quote Link to comment https://www.bigmacktrucks.com/topic/771-r-model-hood-scoops/#findComment-3772 Share on other sites More sharing options...
fullfuel01 Posted February 1, 2006 Share Posted February 1, 2006 if you take a look in my album you'll see that almost every Mack DMM have one. under the hood it's pretty much like on the pics so could be great to find a DMM for your project! I think they use it only with 2 valve engines. Quote Link to comment https://www.bigmacktrucks.com/topic/771-r-model-hood-scoops/#findComment-3776 Share on other sites More sharing options...
John Costley Posted February 5, 2006 Share Posted February 5, 2006 Ive seen them on quite a few different models,some that seemed identicle except for the scoop.I was always under the impression that it was just a heavy duty option, not a standard production piece.John. Quote Link to comment https://www.bigmacktrucks.com/topic/771-r-model-hood-scoops/#findComment-3870 Share on other sites More sharing options...
Rob Posted February 5, 2006 Share Posted February 5, 2006 The 77 R-686 I had used two pipes from the air cleaner and no hood scoop for the 676 engine.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/771-r-model-hood-scoops/#findComment-3875 Share on other sites More sharing options...
mackcl96 Posted February 5, 2006 Share Posted February 5, 2006 My '74 RS has that same style hood. I think there pretty cool looking.1974 what a year. Dad had westcoast f model 285/ 5spd and 4" straight pipe, no scoop (no hood)but duel 8" intake pipes up the back. Then we put those ram air scoops mack was selling in the late 70son themhood scoops will never die seen many on US and Canadian macks today (rw cl and ch's} Quote Thanks for hearing me out.You can have the soap box now---------JIM Link to comment https://www.bigmacktrucks.com/topic/771-r-model-hood-scoops/#findComment-3877 Share on other sites More sharing options...
bulldog man Posted February 7, 2006 Share Posted February 7, 2006 Buddy of mine had a 75' Triaxle DM Dump w/ hood scoop & i looked under the hood whoa that was a air intake system i had never seen on a DOG untill then man what a difference than regular Mack motor BTW Was this a similar setup like the 300 plus ? have a goodone Bulldog Quote You Cant Fix Stupid. But You Can Numb It With A Sledgehammer. Link to comment https://www.bigmacktrucks.com/topic/771-r-model-hood-scoops/#findComment-3937 Share on other sites More sharing options...
ThaddeusW Posted February 7, 2006 Share Posted February 7, 2006 under the scoop should be filter and duct that feeds air to the tip turbine. if you happen to run across a junker with that set-up i want it for my next project. scottDont wanna sound dumb, but, what does the front of the hood look like with the scoop? Quote -Thad What America needs is less bull and more Bulldog! Link to comment https://www.bigmacktrucks.com/topic/771-r-model-hood-scoops/#findComment-3938 Share on other sites More sharing options...
Superdog Posted February 8, 2006 Share Posted February 8, 2006 My 1975 RS686LST with hood scoop. Quote Link to comment https://www.bigmacktrucks.com/topic/771-r-model-hood-scoops/#findComment-3943 Share on other sites More sharing options...
Doug Maney Posted February 18, 2006 Share Posted February 18, 2006 As it has been stated, I verified today that the hood scoop was used on the R until '75-76 model year. The changeover may have allowed you to end up with either a hood scoop or two pipe air cleaner. The reason for going away from the scoop was to eliminate debris from getting sucked into the air cooler. Heavier models such as DM, DMM and RM used the scoop into the '80's. I didn't verify the last year I saw them on the Mack calendars but I probably will just for giggles. Doug Quote Interested in Old Trucks? Check out: www.antiquetruckclubofamerica.org Link to comment https://www.bigmacktrucks.com/topic/771-r-model-hood-scoops/#findComment-4119 Share on other sites More sharing options...
InKWtrucker Posted February 18, 2006 Share Posted February 18, 2006 Hi There Guys! I was always to the understanding that an R-model with the scoop on the hood was a 300+ and the R-700's hoods were a different line bcause they were the western Mack. (Built in CA.)1965 B755.... Always Remember and Never Forget!"IN DOG WE TRUST" Quote 1965 B755 OWNER/OPERATOR 1965 Mack B755, 325hp V-8, 15spd. Tri-Plex, 44,000 Camelbacks, Twin Screw.... 1969 Mack R6 , 250hp il6cyl., 15spd. Tri-Plex, 46,000 Camelbacks, Twin Screw.... 1995 KW T600/603 500hp-3406E CAT, 18spd. Roadranger, Rockwell SQHD's @ 3.70's, 60" ADAC, 10 Alums., Dig. Dash, Sunroof, Headache Rack, Sliding 5th wh., LP24.5's, KW 8-bag Airglide 200 Air Ride, White w/ Red,Blue,&Gold Graphics & Lettering. over Black bumper & side fairings..... 1986 J&L 43' SS 5000gal. tank on Air.... 1986 Grain Hopper 43'x96"x80" on Air... 1978 Ravens 42'x96"x4' lite wght. sidekit w/ tarp and 32" rise bows, on 9' spread on Hen. A/R.... 1991 CPS 45'x102"x12'6" Walking Floor, Spring Ride, Closed Tandem.... 1977 Lowboy 24' deck w/ 4' beavertail, Tri-Axle... 1966 Fruehauf 40' close tandem spring/slider w/ easy trip log bunks.... 1986 Ford F250 4x4 6.9L Diesel, C-6, SC... 1987 Chevy V20 4x4 350FI, 400 Auto., Custom Show Truck, 41k orig. miles... 1968 IH Scout 304ci, Auto., 4x4, Project... 1998 Cub Cadet 2000 Series Pulling Tractor 25hp Kohler Command V-Twin in 20 Stock Class.... Link to comment https://www.bigmacktrucks.com/topic/771-r-model-hood-scoops/#findComment-4129 Share on other sites More sharing options...
Doug Maney Posted February 18, 2006 Share Posted February 18, 2006 Yes, the hood scoops were used on the 300+, it was the air intake for the tip turbine. An R-700 was not only a Hayward built truck, they were built in Pennsylvania as well. The western built trucks were labelled as such and most if not all were RL or RS models with aluminum components. Knowing how was at the time I would think that they may have built some standard spec trucks in the western plant. I am going to start a new thread on this subject. Quote Interested in Old Trucks? Check out: www.antiquetruckclubofamerica.org Link to comment https://www.bigmacktrucks.com/topic/771-r-model-hood-scoops/#findComment-4130 Share on other sites More sharing options...
HK Trucking Posted February 19, 2006 Share Posted February 19, 2006 Yes, the hood scoops were used on the 300+, it was the air intake for the tip turbine. An R-700 was not only a Hayward built truck, they were built in Pennsylvania as well. The western built trucks were labelled as such and most if not all were RL or RS models with aluminum components. Knowing how was at the time I would think that they may have built some standard spec trucks in the western plant. I am going to start a new thread on this subject.I had a 1985 DM686s with the scoop setup for the intercooler air, it also had the steel hood, it was originally a municipal truck with central hydraulics, snow plow etc. I was the 3rd owner, completely refurbished the truck in 96.Will try to attach photos if I can figure out the process.Yes, the hood scoops were used on the 300+, it was the air intake for the tip turbine. An R-700 was not only a Hayward built truck, they were built in Pennsylvania as well. The western built trucks were labelled as such and most if not all were RL or RS models with aluminum components. Knowing how was at the time I would think that they may have built some standard spec trucks in the western plant. I am going to start a new thread on this subject.I had a 1985 DM686s with the scoop setup for the intercooler air, it also had the steel hood, it was originally a municipal truck with central hydraulics, snow plow etc. I was the 3rd owner, completely refurbished the truck in 96.Will try to attach photos if I can figure out the process.Yes, the hood scoops were used on the 300+, it was the air intake for the tip turbine. An R-700 was not only a Hayward built truck, they were built in Pennsylvania as well. The western built trucks were labelled as such and most if not all were RL or RS models with aluminum components. Knowing how was at the time I would think that they may have built some standard spec trucks in the western plant. I am going to start a new thread on this subject.I had a 1985 DM686s with the scoop setup for the intercooler air, it also had the steel hood, it was originally a municipal truck with central hydraulics, snow plow etc. I was the 3rd owner, completely refurbished the truck in 96.Will try to attach photos if I can figure out the process. Quote "If You Can't Shift It Smoothly, You Shouldn't Be Driving It" Link to comment https://www.bigmacktrucks.com/topic/771-r-model-hood-scoops/#findComment-4158 Share on other sites More sharing options...
Lmackattack Posted February 19, 2006 Author Share Posted February 19, 2006 Tuff looking mack. wouldent want to get its way!!what do you haul in that monster!!!!!Tuff looking mack. wouldent want to get its way!!what do you haul in that monster!!!!! Quote Link to comment https://www.bigmacktrucks.com/topic/771-r-model-hood-scoops/#findComment-4162 Share on other sites More sharing options...
HK Trucking Posted February 19, 2006 Share Posted February 19, 2006 Tuff looking mack. wouldent want to get its way!!what do you haul in that monster!!!!!Anything that would fit thru the tailgate & even some stuff that didnt! I sold it in 2000, wish id have held on to it. It had a 300 with air shift 6 spd & 44k rears Quote "If You Can't Shift It Smoothly, You Shouldn't Be Driving It" Link to comment https://www.bigmacktrucks.com/topic/771-r-model-hood-scoops/#findComment-4163 Share on other sites More sharing options...
MidniteMechanic Posted February 20, 2006 Share Posted February 20, 2006 I believe that trucks built at Hayward used a five digit VIN. I know my '74 was. Oddly the only thing aluminum is the doors. The rails and everything else is steel. Quote Link to comment https://www.bigmacktrucks.com/topic/771-r-model-hood-scoops/#findComment-4185 Share on other sites More sharing options...
b61mack Posted February 20, 2006 Share Posted February 20, 2006 I believe that trucks built at Hayward used a five digit VIN. I know my '74 was. Oddly the only thing aluminum is the doors. The rails and everything else is steel.I have seen F models made in Hayward with aluminum fenders,doors,and the top of cab. Ron Quote Link to comment https://www.bigmacktrucks.com/topic/771-r-model-hood-scoops/#findComment-4193 Share on other sites More sharing options...
Superdog Posted February 20, 2006 Share Posted February 20, 2006 I have seen F models made in Hayward with aluminum fenders,doors,and the top of cab. RonThose aluminum panels were available on eastern F models too. Quote Link to comment https://www.bigmacktrucks.com/topic/771-r-model-hood-scoops/#findComment-4194 Share on other sites More sharing options...
Lmackattack Posted February 21, 2006 Author Share Posted February 21, 2006 wonder why the alum panels and doors never cought on with mack? Steel is stronger but if weight is a big issue an alum cab could save alot. The later aluminized cabs seem to hold up pretty well. Quote Link to comment https://www.bigmacktrucks.com/topic/771-r-model-hood-scoops/#findComment-4202 Share on other sites More sharing options...
K-Whopper Posted February 22, 2006 Share Posted February 22, 2006 We had some R-612 Macks come into New Zealand back in 1984 with hood scoops, rumour was they were a cancelled shipment for a plantation in Central America... approx 22 came in as far as I know... (320hp Thermodynes) Quote Link to comment https://www.bigmacktrucks.com/topic/771-r-model-hood-scoops/#findComment-4255 Share on other sites More sharing options...
Outbehindthebarn Posted January 19, 2015 Share Posted January 19, 2015 I've seen two air tubes AND a hood scoop! What's up with that??? 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/#findComment-275055 Share on other sites More sharing options...
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