Lmackattack

That R jones Mack is very nice. Love the metallic blue and aluminum is always shiny. Saw it this time last year running 290 and it looked like it had just left a truck show. I would love to catch a good photo of it, words won't do it justice. I'm more on the northwest side of the suburbs. But we have a few hills that start out with a stoplight. Rt31 and Algonquin rd rings a bell. 1/2 Mile long 6% pull ( big for us flat landers) and at the top was the rock pit entrance. It was a race to get in front of a few trucks if you had the power. Remember running with a bunch of fleet spec remodels. 300,6spd,4.17.... Just watch the stack of the lead truck and if you made your shifts at the same time there everyone made it to the top at the same speed, nice and easy..

Only had 3 pics. The damm was a ex cement truck converted to wrecker. Not sure where it was sold to they only had it for a few years. I think it was to much of a truck for what they needed. They run a big fleet of recovery units for the il tollway. Mostly on road rescue. If I recall it was a 300 with a 6 speed.m

Here are some old ones.. sand.bmp

That's a blast from the past.. I remember when Lenzini was an all Mack fleet...I live 2 min from their yard. Now it's all kw and Pete..

If you can open the hood and hold it at the rpm with vibrations. Look at the engine to see if it's "jumping" if your rear mounts are bad it can cause the vibrating movement. And yea, 30lbs of boost is on the strong side. You should be able to keep up with a 427 untill the top 2 gears. Might be able to hold him all they way.

The balancer does what it sounds like it would,....it Balances the vibrations made fromthe rotationg mass of the motors moving parts.. Think of it as a counter weight to off set vibrations. Picture a 5 lb weight on a chain. Swing it around and you will find you are leaning backwards to off set the outward pull of the weight. The balancer is made from rubber and steel. Some may have liquid in them. As the engine turns each cyl fires off and sends a shock wave thru the crank and is absorbed by the balancer . A bad balancer may not be able to absorb the shock waves and thus you feel the vibration more.

Wait till vinny sees this!

He texted me this morning. We're trying to meet up so I can hand off his landing gear that I brought back from Queens N.Y this summer. It's been under my trailer for. 5 months now and they are about to get snowed in!

if you can get good hot heat in the cab, with the fan on Hi. that tells me that coolant flow should be working and the water pump is pushing coolant around the cooling system. Does sound like a bad T-stat.... remove it and replace while your in there. and if you want test the old one in a pot of water on the stove. you should see it open up as the water temp is getting hotter. if it does not open,you found where your problem was! Let us know.

Don't think so but check it anyways. If i remember correctly The water system is a bypass system it filters coolant but also let's water by pass it if the flow thru it is restrictive. You need to check for coolant flow and see if the thurmostat is opening. Does your cab heat work?

Bad water pump Bad thurmostat Sounds like you don't have flow or the thurmostat is stuck shut

From what I have seen on a 89 super liner with 440 V8 The tach drive Seam to fail all the time. We replace one every 5 years. Air throttle was a joke. Exhaust studs can be a pita. Other than that parts will be harder and harder to find. The truck had 425,000 and needed a rebuild but the owner was never good at maintance. Real bad infact.

What's your 4 axel tractor weigh? buddy just bought a 4 axel Pete to heavy haul with.

Good looking truck, great drive train set up. And has a nice wheelbase. A Common rear with that trans was 3.87 or 4.17 will put you around 75 mph.

The ones I remember were black boxes about 3' by 4" and bolted to the door panel, think they went right over the window crank rod that sticks out of the panel. In a R model your knee would hit it all the time if in the passenger seat. Forget about using it on the drivers door!. Thats how I remember them. CH cab might have more room but they are a ugly add on if you have a nice interior...

I would be intrested to see how powerfull it is. the window felt can be tight and is a PITA to roll up by hand on some doors.,,

Looking good. Nice specs as well... What color will you paint it?

I would suspect you could go behind the door panel? It would be a custom install for sure might look into that for my r model.

I can't locate my performance chart but I recal the 250L and 275L made peak torque around 1050rpm. That's about 300rpm lower than a 2100 rpm pump. What I was trying to get at was if he wants more power for the hills. He shouldhave his pump re calibrated , set to 2100 rpm with 350 hp specs.... His turbo and injectors should be the same, cam may be different but that's all pretty easy stuff to check. If its that simple he can go from a 275L to a 350HP 2100 rpm pump. Then with the 350 spec have the shop bump up flow + 10% to 15%. Not only will he have lots more power, more road speed and more rpm to work with . All for around $400. Not a bad price for all that gain... I drove 2 diffrent 89 R models both with 350 and a 9 speed. Remember one trip to long island and back and the truck was getting 6.2 mpg with a van trailer. Pulled the hills great with a load of mail I was hauling. Went thru upstate ny and never dropped below 40mph on any of the long hills. That was a fun trip.

Give it another week. If no reply...Keep the cash find a new title. Plenty of scrapped trailers out there or other options. Just be smart about who you ask and who you tell...

Not sure about the cam... Would have to ask a Mack mechanic to be sure. I have a friend that converted a 300L to a standard 300 has a 5 speed with overdrive in 5th. Think it had 4.42 or 502 gears? Truck had more go with the 2100rpm pump. and would do about 70 mph after RPM and fuel was turned up. She did drink fuel tho 5mpg maybe 5.2mpg....but it only had 5 gears so hi way speed was 1900rpm all day.

Also just noticed that's it's a 275L.....yuck! Under powered and low rpm... That is fleet spec for LTL in my opinion. Check with a dealer on your options but im almost certain you can Have your pump converted to a 350 / 2100 rpm and reset timing and it will be a different truck. 350 and a 9 speed will pull much better and still gets good mpg with your overdrive. It will be about an 82mph truck, still have power and low end grunt. Drove one with that set up and loved it...

Difference will be in the pump and timing. 300 was a maxidyne and used less gears than a 350. At least that's how it was with the r models. gearing it slower will improve pulling power and it will be most noticed out of the hole. However I don't think you will see a huge gain in speed on the hills. The small displacement Mack just won't pull like a big cat. I have driven 400hp Mack's that pull good on hills but still will not keep up on the hill following a 400 cat. Being that it's a dump truck the smaller tire is a better choice.. That's my .02

That sounds about right. But am Surprised how light your alum step deck weighs. My RS700 and 22' steel frameless end dump weighs in at about 28,500 and it's half the length!

was going to say look at that Vin number close when you go to buy it! Nice truck tho and great specs...