Moderator: Mod Squad
1971ford wrote:....... a carbed 300 ...... Truck weighs 5,200 .. trailer about 6,000 ... able to tow ... without struggling. I need milage, ... 18mpg's would be nice. What carb/intake/exhaust/cam/etc. is best for my application without sacrificing gas milage?? Thanks!
1971ford wrote:.......has to be able to tow this without struggling. I also need good milage, something like 18mpg's would be nice......
Lazy JW wrote:1971ford wrote:.......has to be able to tow this without struggling. I also need good milage, something like 18mpg's would be nice......
Dream on my friend, dream on.........
Harte3 wrote:I get 18+ mpg when empty holding at a maximum speed of 62 mph.
Harte3 wrote:Well, I wondered about the calculation of the gear ratio as it seemed a bit tall to me. The calculations were made based on the rpm/speed/tire size...235/75R15...30 mph at 1000 rpm, 60 mph at 2000 rpm. Speedometer/odometer is correct verified over 100 miles against highway mile markers. The tach might be off but I don't think so.
Emerald 74 4X4 wrote:Yeah, usually theres a threshold between a tach serving a purpose and actually giving you an accurate reading for data compilation and usage. That threshold usually ends up being between street and racing applications.
1971ford wrote:Wow, lots of info, thanks guys...
When i said 18mpg's, i meant unloaded, i don't care about mpg's when loaded
The gears are 4.10's, but instead of swapping gears out I'll change tire sizes. Right now i have 32's. Great for towing but screams on the highway so I'll run 35's. That should be a good mpg/towing mix. Somewhere in between at least.
Also there is a chance i will be picking up an EFI 300 and not a carbed 300. But either way, it's a 300. ALso I might be swapping a mazda
So a stock 300 will tow the load fine but just will take a bit to get up to speed right? some grades while gowing over the sierra won't be a big issue? There arn't any gnarly grades..
oughtsix wrote:As far as using a mazda trans, all I can say is NO. Bad Idea. The trans you have could be the best light truck trans ever made, and since you seem to have a decent budget for this venture, why not troll ebay or clist for a gear vendors or similar auxiliary trans. I love the use of low range, unlocked hubs, in my 96, and would love to have a little taller gear for highway use. However if you want 18 mpgeeze... not happening with any motor that needs spark plugs, loaded anyway. I am trying to buy a 93 f250 IDI 7.3 from my former boss....it got 15-16 loaded similarly to you scenario with me driving (not my truck + not my fuel = less prudence with the thottle). You can drive daylight to dark, then let it keep you nice and toasty all night for days on end.
I love my 300, dont get me wrong, but towing that kind of weight for any distance on a consistent basis is going to be hard on it in any configuration. I think of mine like a 150 horse tractor. Sure, It'll pull whatever the heck I want it to, but I'm not heading for the opposite coast in the john deere there are better tools for that.
x2 on the slave cylinder. First off, the engineer who designed it must have gotten a bonus check for extra stupidity. It's a pitiful design but an excellent business strategy to make the weakest link in the system the hardest to get to.
Keep the 4 speed.
1971ford wrote:okay, the 4spd stays, atleast until i can get a ZF.
I found a few 300's at the junkyard finally, too bad everyone leaves the hoods open in the rain.
Users browsing this forum: Carloespo and 4 guests