i got a 359ft block
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The odd gizmo is probably the rev limiter.
I'd also go with 361 plugs of the same year, not 360 (if they are different) because the lower compression would certainly affect the heat range you'd want.
I'd also go with 361 plugs of the same year, not 360 (if they are different) because the lower compression would certainly affect the heat range you'd want.
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Originally Posted by rusty70f100
This is true. Although, 360's didn't have spectacularly high compression to begin with...
I checked the Motor's manual again, they show BRF-42 plugs for 360, BRF-31 for 361 for '78... big diff in heat range I guess...
I wonder if the only diff between a 359 and a 361 is the governed RPM. Is 3300 RPM a magic 55MPH in an F600? Maybe U-haul didn't want anyone going over 55?
Motor's lists some things like valve and crank/crankpin specs the same as the 361, as in they'll list "359, 361" on the same line for valve specs.
art k.
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From: Union, Washington
The 500 Holley can and probably will hurt. The 500 will be way more carb than this engine at 3300 rpms needs or wants. I would expect a loss of low end preformance and poorer fuel economy than is already there. A 350 cfm carb (the standard 360 carb) would be a better choice.
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From: In Bladensburg, OH.
Thanks so much! The heat range on the plugs was a concern. Rpm, compression, etc, kind of dictate plugs, but I have no idea how to choose them. I am going to look for some numbers on the carb, I'm not sure if it is original or not. I felt the 500 might be a bit lazy once I learned it was a low rpm motor, especially under 400 cubes. 500cfm may be about right on a low rpm 534 or something.
There is a vacuum advance on the distributor, in addition the mystery devise. I guess it could be a governor, or rev limiter, although I’ve never seen one. I don’t think this truck will ever see the high side of 55mph, and will make it’s monthly 90 mile round trip to the feed store at about 45, that’s comfortable on the route we take. U-Haul has 45mph plastered everywhere inside the thing, but we’ve not had it over 35 yet. We just brought it home, now we’re going to go through the mechanicals, and put it in service. It’s been dormant for 2 years, and was used for this same job before that.
Anyone know what it is rated at? GVWR, payload, etc? The stickers are faded out.
Thanks Again!
There is a vacuum advance on the distributor, in addition the mystery devise. I guess it could be a governor, or rev limiter, although I’ve never seen one. I don’t think this truck will ever see the high side of 55mph, and will make it’s monthly 90 mile round trip to the feed store at about 45, that’s comfortable on the route we take. U-Haul has 45mph plastered everywhere inside the thing, but we’ve not had it over 35 yet. We just brought it home, now we’re going to go through the mechanicals, and put it in service. It’s been dormant for 2 years, and was used for this same job before that.
Anyone know what it is rated at? GVWR, payload, etc? The stickers are faded out.
Thanks Again!
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From: Union, Washington
Usually the governor on these things is a vacuum diaphragm on the carb. If you replace the carb, don't replace the carb with a like item. Get a regular Holley carb and the governor will be gone. However you will find that the engine will not have much left in the way of additional power above the 3300 point. I replaced the governor Holley carb on a 391 in a fire truck a few years back, well more than a few (20) and the governor was gone, but the engine rolled over before 4000 rpms and the governor had kept it to 3600.
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From: In Bladensburg, OH.
Thanks Bear. The only reason I want to change the carb is that the old one is not acting real good, and I have the 500. I will try to put a kit into, and clean the old carb, since the 500 isn't such a good idea. I am more concerned with efficiency and reliability than power gains. Power and rpm wise, I figure the cam is the real limiting factor, and I'd rather keep the bottom end than gain power on top. I don't think the mileage will be that great, but for the price of a new truck, at 100 miles use a month, I can buy a lot of gas. I am hoping for 6-8 mpg, driving like Grandma. I probably won't notice a governor or rev limiter, I'll be taking it easy. Thank for the info.
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From: Adams TN
6-8 loaded?
more like 3-4 loaded.
Those trucks are geared so low that the engine is always screaming guzzling gas.
but you might muster 5 driving like a grandma.
How much weight are you hauling?
more like 3-4 loaded.
Those trucks are geared so low that the engine is always screaming guzzling gas.
but you might muster 5 driving like a grandma.
How much weight are you hauling?
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From: In Bladensburg, OH.
I am currently hauling 2000lbs in a '99 E-150 Clubwagon, and going weekly. I get around 15 mpg, and spend 3 hours or so. I hope to shorten to one trip a month, so about 8000lbs or so, give or take. 3-4mpg? You really think so? I don't doubt you, I was just hoping for more. Keep in mind I am only loaded on the return trip, and as luck has it, more of the return is down hill than up. Once I tune it up and get the vacuum brakes adjusted up, We'll have to try it out and see. You are probably right, though.
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From: Adams TN
well i'm not positive. Never really been around an F600. But the old IH's we use in the summer and fall hauling hay get 3-4 loaded 35mph on flat ground 9-15mph on hills grossing 40-50k pulling a couple hay wagons.
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What motor on the IH? 40-50k is REAL heavy to me, I can't imagine having to stop it, much less pull it. I'd think that would have to be more of a truck than a F600. I don't have any load or weight data on the truck, the numbers are faded out. I think it is under CDL, so must be less than 26k gvw. I guess it weighs about 10k, but that is ballpark at best. I'd think it could handle a 10k load, I've put 6k on a dually pickup. It (the F600) does have 22.5 tires, though. I've never been around those before. Maybe it is rated higher. I just wish it didn't sit so doggone high. That is why the last owner didn't use it, unloading a couple tons worth of 50lb bags from shoulder height is no fun.
Last edited by Wrench Turner; May 20, 2005 at 06:07 PM. Reason: clarification of facts, details
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From: Adams TN
They are IH tandem axle Loadstars. They are actually Single axle with a tag. two speed rear end helps alot. It only happens once a year and its my buddy's farm we move the hay from his farm to his parents to store in barns. It doesn't really justify a bigger trucks. Stopping isn't bad because were not goin very fast but would hate to stop in a hurry.
Yes the trucks are over loaded alot but i see worse all the time.
How about a 60's chevy c50 pulling a 53ft semi Flatbed loaded 3 rolls high and a tractor on the back. That is the genious from school. He ain't quite there.
The truck will only run 30mph like that.
The IH's engines one of them has a 392 or 404 something around there. and the other one has a 6-71 Detroit and a 5spd alot better to drive.
We reguarly see Combines rolling down the road taking up both lanes.
Being a Uhaul truck i'm supprised it wasn't a low pro.
Are the 22.5's Budd's or split rims?
The split rims suck and are dangerous i'd get rid of em.
40-50k not on it's back. It is towing that kind of weight. i think the GCWR is 45 or 50k and the GVW is 30 or 31k.
Here in tennessee if you use it for farm work regardless of weight you don't need a CDL.
DT
Yes the trucks are over loaded alot but i see worse all the time.
How about a 60's chevy c50 pulling a 53ft semi Flatbed loaded 3 rolls high and a tractor on the back. That is the genious from school. He ain't quite there.
The truck will only run 30mph like that.
The IH's engines one of them has a 392 or 404 something around there. and the other one has a 6-71 Detroit and a 5spd alot better to drive.
We reguarly see Combines rolling down the road taking up both lanes.
Being a Uhaul truck i'm supprised it wasn't a low pro.
Are the 22.5's Budd's or split rims?
The split rims suck and are dangerous i'd get rid of em.
40-50k not on it's back. It is towing that kind of weight. i think the GCWR is 45 or 50k and the GVW is 30 or 31k.
Here in tennessee if you use it for farm work regardless of weight you don't need a CDL.
DT
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From: Union, Washington
With a flatbed truck you will see a big difference between loaded and unloaded. Mainly from wind resistance changes caused by the load. If it was a box van there would be almost no difference, be worse than bad all the time. With my '84 F250 460 with 4.11 gears, I get 9 to 10 without the camper and around 7 with. Hang boat or quad trailer (holds 4 quads) behind the camper, no change. So it's pushing the brick thru the air that kills the mileage, not the weight. At least when it's under 10K, over starts hurting again.
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Makes perfect sense, Bear. Didn't think of the barn door effect. It has a tall, walk in box. Thanks Man.
ps, Aerodynamic are less of a problem at slower speeds, although to what degree I am unsure.
ps, Aerodynamic are less of a problem at slower speeds, although to what degree I am unsure.
Last edited by Wrench Turner; May 20, 2005 at 07:34 PM. Reason: thought of something else