Bobby Covert Posted January 7, 2014 Share Posted January 7, 2014 What year did Mack come out with the 205 HP 673P? Quote Link to comment https://www.bigmacktrucks.com/topic/34135-673p/ Share on other sites More sharing options...
Maddog13407 Posted January 7, 2014 Share Posted January 7, 2014 I believe around late 1961, early 1962, same here they came out with the 711 Quote Link to comment https://www.bigmacktrucks.com/topic/34135-673p/#findComment-225129 Share on other sites More sharing options...
Popular Post 57 bcr Posted January 7, 2014 Popular Post Share Posted January 7, 2014 The END673P was 187hp,wasn't it? I think the early ENDT 673 was 205hp. 3 Quote IF YOU BOUGHT IT, A TRUCK BROUGHT IT..AND WHEN YOU'RE DONE WITH IT, A TRUCK WILL HAUL IT AWAY!!! Big John Trimble,WRVA Link to comment https://www.bigmacktrucks.com/topic/34135-673p/#findComment-225167 Share on other sites More sharing options...
theakerstwo Posted January 7, 2014 Share Posted January 7, 2014 That is the way I remember it. Quote glenn akers Link to comment https://www.bigmacktrucks.com/topic/34135-673p/#findComment-225168 Share on other sites More sharing options...
Bigdogtrucker Posted January 7, 2014 Share Posted January 7, 2014 The END673P was 187hp,wasn't it? I think the early ENDT 673 was 205hp.I had a factory Mack brochure I believe said that. Quote Link to comment https://www.bigmacktrucks.com/topic/34135-673p/#findComment-225169 Share on other sites More sharing options...
bullhusk Posted January 7, 2014 Share Posted January 7, 2014 The 673 P had no turbo but was a hellava good motor!BULLHUSK 1 Quote Link to comment https://www.bigmacktrucks.com/topic/34135-673p/#findComment-225186 Share on other sites More sharing options...
39 Baby Mack Posted January 7, 2014 Share Posted January 7, 2014 You're right AlThe "P" engine had the twin intake manifolds, I thought the original rating was 180 H.P.The 205 H.P. was the original rating for for the ENDT 673 turbo motor.Ron Quote Link to comment https://www.bigmacktrucks.com/topic/34135-673p/#findComment-225188 Share on other sites More sharing options...
Brian Blaylock Posted January 7, 2014 Share Posted January 7, 2014 If I remember right my non turbo 673p is rated at 195hp Quote Link to comment https://www.bigmacktrucks.com/topic/34135-673p/#findComment-225213 Share on other sites More sharing options...
j hancock Posted January 7, 2014 Share Posted January 7, 2014 I believe there is an ENDLT 673 which was 205 hp also. 1 Quote JimIt doesn't cost anything to pay attention. Link to comment https://www.bigmacktrucks.com/topic/34135-673p/#findComment-225214 Share on other sites More sharing options...
Popular Post Maddog13407 Posted January 7, 2014 Popular Post Share Posted January 7, 2014 non turbo 673 was around 170hp, the P engines with the split intake like a 711 were 187hp, the original 673 turbo was 205hp, the 711 was 211hp and the newer turbo 673B and C were 225 and 250hp 3 Quote Link to comment https://www.bigmacktrucks.com/topic/34135-673p/#findComment-225282 Share on other sites More sharing options...
rickykarenpr Posted January 7, 2014 Share Posted January 7, 2014 nice Quote Link to comment https://www.bigmacktrucks.com/topic/34135-673p/#findComment-225284 Share on other sites More sharing options...
james j neiweem Posted January 8, 2014 Share Posted January 8, 2014 As I recall I think Mad dog nailed it. I saw the ENDT 673 205's in 1960 0r 1961. Quote Link to comment https://www.bigmacktrucks.com/topic/34135-673p/#findComment-225391 Share on other sites More sharing options...
57 bcr Posted January 8, 2014 Share Posted January 8, 2014 Don't know how accurate it is but there is a picture in the ICOGNOGRAFIX 1st B model archive book that shows a water cooled Schwitzer turbo in a '55 B-753LS. Quote IF YOU BOUGHT IT, A TRUCK BROUGHT IT..AND WHEN YOU'RE DONE WITH IT, A TRUCK WILL HAUL IT AWAY!!! Big John Trimble,WRVA Link to comment https://www.bigmacktrucks.com/topic/34135-673p/#findComment-225398 Share on other sites More sharing options...
Mike Posted January 8, 2014 Share Posted January 8, 2014 I've been wanting to take a survey on how many of our BMT members have the END 673P engine. I could not understand why they toyed with this motor so much. What i've been told is this engine had smaller rod diameter ends. I would think that would cause it to not be very durable in the bottom end of that series engine. My paperwork say's that this engine was 180 hp. in my 1962 B Model and it does have the original unit.mike Quote Link to comment https://www.bigmacktrucks.com/topic/34135-673p/#findComment-225409 Share on other sites More sharing options...
57 bcr Posted January 8, 2014 Share Posted January 8, 2014 .....HHHHMMMMM? Maybe the extra 7hp,was with the "hop-up" kit! I always heard they ran good.Not so with the 711. But then again,thats hearsay.I don't own either one of those motors. Quote IF YOU BOUGHT IT, A TRUCK BROUGHT IT..AND WHEN YOU'RE DONE WITH IT, A TRUCK WILL HAUL IT AWAY!!! Big John Trimble,WRVA Link to comment https://www.bigmacktrucks.com/topic/34135-673p/#findComment-225435 Share on other sites More sharing options...
Mike Posted January 8, 2014 Share Posted January 8, 2014 .....HHHHMMMMM? Maybe the extra 7hp,was with the "hop-up" kit! I always heard they ran good.Not so with the 711. But then again,thats hearsay.I don't own either one of those motors. Someone must have been spraying some laughing gas into it in order to obtain more HP.LOL mike 1 Quote Link to comment https://www.bigmacktrucks.com/topic/34135-673p/#findComment-225453 Share on other sites More sharing options...
Freightrain Posted January 8, 2014 Share Posted January 8, 2014 I think my old 673 runs pretty well for a 55 yr old motor. Ya, it could use a few more ponies, but it is pretty reliable and gets 8-9 mpg. If I thought I could bolt a turbo on it and not really hurt it, I might. Turn the fuel up a few notches too. Just don't like the fact I don't have oil cooled pistons.I always wanted to drive a 250hp version to see what it is really like with a load. My N/A version runs good bobtail, so that is not much of an issue. Quote Larry 1959 B61 Liv'n Large...................... Charter member of the "MACK PACK" Link to comment https://www.bigmacktrucks.com/topic/34135-673p/#findComment-225456 Share on other sites More sharing options...
Joe Ditchkus Posted January 8, 2014 Share Posted January 8, 2014 Mike for your survey. My 1962 B-67T has a END 673P in it. It runs fine but then again I do not work it. Joe D. Quote Link to comment https://www.bigmacktrucks.com/topic/34135-673p/#findComment-225463 Share on other sites More sharing options...
57 bcr Posted January 8, 2014 Share Posted January 8, 2014 Larry,My BCR has an END-673D (200hp stock) with a turbo & oil cooler put on it from the original owner.With the compression ratio of 15.81:1,it should be like 225hp.The fuel is turned up a notch and now has a 237's turbo on it.Bobtail I'm in the 9-10 mpg range.Pulling my little lowboy I lose 1-1.5 mpg. She leaves a slight trail of black smoke nearly all the time. If it did not have a turbo on it when I bought it,I probably wouldn't have gone through the trouble,especially if it was already running good. My next B (when I get to it) will have an END-673 (n/a) in it. Al Quote IF YOU BOUGHT IT, A TRUCK BROUGHT IT..AND WHEN YOU'RE DONE WITH IT, A TRUCK WILL HAUL IT AWAY!!! Big John Trimble,WRVA Link to comment https://www.bigmacktrucks.com/topic/34135-673p/#findComment-225481 Share on other sites More sharing options...
Freightrain Posted January 8, 2014 Share Posted January 8, 2014 That's the problem...I will likely hardly notice the power increase? It will never be "enough".I used to have my pump turned up. It would RUN. Only problem it got like 4 mpg. I turned it back down and it gets 7-8 pulling my trailer with a nice light haze from the pipes. Quote Larry 1959 B61 Liv'n Large...................... Charter member of the "MACK PACK" Link to comment https://www.bigmacktrucks.com/topic/34135-673p/#findComment-225487 Share on other sites More sharing options...
Maddog13407 Posted January 8, 2014 Share Posted January 8, 2014 we forgot the engine in my B613T, its an END707. must have been a short block or something as is came out of a B61SX I scrapped and was clean as a whistle. my engine doesn't have piston squirters but does have fire rings and the same head gaskets as a 237. same part number. doesn't have the old style copper gaskets, has the thin ones for more compression. I have seen it listed in an R model brochure from the 70's as an option and is listed as 200hp at 1800RPMs. would love to turbo it but don't wanna hurt it without the piston squirters. doesn't smoke at all and id like to turn the fuel up a notch but don't know how. just want a little smoke for play as I don't work it. would like to find a endt673b or c for it someday or a 237. Quote Link to comment https://www.bigmacktrucks.com/topic/34135-673p/#findComment-225489 Share on other sites More sharing options...
57 bcr Posted January 8, 2014 Share Posted January 8, 2014 What we're doing with these trucks (showing them,parades,etc) is the easiest they've ever had it. I like the reliability and simplicity that was built into these workhorses. I believe strongly in "If ain't broke,don't fix it". Braggin' rights are for the dragstrip (or a certain black Superliner who thinks he's at one !). Don't get me wrong,I like to watch the tests of these trucks pullin' at the county fairs,you just won't see mine out there (not enough ponies) . Quote IF YOU BOUGHT IT, A TRUCK BROUGHT IT..AND WHEN YOU'RE DONE WITH IT, A TRUCK WILL HAUL IT AWAY!!! Big John Trimble,WRVA Link to comment https://www.bigmacktrucks.com/topic/34135-673p/#findComment-225494 Share on other sites More sharing options...
Mike Posted January 9, 2014 Share Posted January 9, 2014 What we're doing with these trucks (showing them,parades,etc) is the easiest they've ever had it. I like the reliability and simplicity that was built into these workhorses. I believe strongly in "If ain't broke,don't fix it". Braggin' rights are for the dragstrip (or a certain black Superliner who thinks he's at one !). Don't get me wrong,I like to watch the tests of these trucks pullin' at the county fairs,you just won't see mine out there (not enough ponies) .I used to hear my dad say the same thing "If it ain't broke don't fix it". I have wondered if the 707, 711 and 673P are the same internals as Matt was talking about his 707?Larry, sounds like your engine is purring along just fine and happy with that haze coming from the exhaust. Were the oil squirters used only for Turbo motors, to keep those pistons cool?mikemike Quote Link to comment https://www.bigmacktrucks.com/topic/34135-673p/#findComment-225591 Share on other sites More sharing options...
Maddog13407 Posted January 9, 2014 Share Posted January 9, 2014 all the 673's had a 4 7/8 bored, my end707 and the 711 have a 5'' bore. never seen a 711 with fire rings, not sayin it couldn't have ben retrofitted. my 707 has maxidyne head gaskets and fire rings. the piston squirters were used on the later 673 turbos, the b and c engines. they weren't on the early end673t's only on the later endt673c and endt673c's 1 Quote Link to comment https://www.bigmacktrucks.com/topic/34135-673p/#findComment-225606 Share on other sites More sharing options...
39 Baby Mack Posted January 9, 2014 Share Posted January 9, 2014 all the 673's had a 4 7/8 bored, my end707 and the 711 have a 5'' bore. never seen a 711 with fire rings, not sayin it couldn't have ben retrofitted. my 707 has maxidyne head gaskets and fire rings. the piston squirters were used on the later 673 turbos, the b and c engines. they weren't on the early end673t's only on the later endt673c and endt673c'sI don't think you can retrofit a 711 with fire rings.Didn't all 711's have eighteen stud 9/16" stud heads?The earlier blocks didn't have the double corner studs.There was one variation that had sixteen 9/16" studs and two 3/4" corner studs before they went to the twenty 5/8" stud block.The only blocks that can use the fire ring liner and grooved head has to have the twenty 5/8" stud block and heads in order to properly "coin" the fire rings.Ron Quote Link to comment https://www.bigmacktrucks.com/topic/34135-673p/#findComment-225608 Share on other sites More sharing options...
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