Quote:
Originally Posted by rstevens62
I agree 100%, I rebuilt a Yanmar 3 cyl diesel from an mid 90s commercial outfront mower, that little engine was putting about close to 36hp and could probably have been brought up to around 50hp without too much hassle or loss. It could have easily powered a small daily driver, did I mention how indestructible these engines are?!! I have no idea what kind of MPG it would get put into a daily driver on the roads, but I bet it would be close to 70 Mpg +.
I also had this Yanmar running totally clean, no black smoke at all, didnt leak or burn oil either.
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I was building 7.3s 6.0s and 6.4s that made very very impressive numbers. Not a single one of the 6.0s or 6.4s even made a bit of haze 7.3s on the other hand... they have what I call dumb PCMs.
HEUI injection from 7.3s... think of it like this...
It's that odd cousin who shows up to a wedding with a mullet aviators and in a tuxedo printed T shirt who can't help but drool and slobber... nice guy... will do anything for anyone. Strong. But not the brightest drinks and smokes. Alot. Has some potential.
6.0 HEUI injection system is a bit more refined, like the slobbering loudmouth older cousin. Doesn't drink as much. Doesn't smoke. Has alot of potential.
6.4 common rail is the stock broker/PhD. Very refined. Lots of potential.
I have trucks in the northeast NY MA CT NJ VT that are still running to this day unless they've rotted away, that push 600hp 800+ft lbs of torque at the least, on up to dyno destroying 1500hp 2000+ft lbs of torque. Daily driven. Not so much as a haze from the exhaust.
The guys that own them, run them at sled pulls in county fairs and drag race them on weekends. Can usually be found towing equipment and materials monday-friday.
When you see a 8k+ pound crew cab 3/4-1 ton truck embarrass "muscle cars" in the quarter mile.
and not even so much as a haze exiting the exhaust... that's impressive.
Had I remained in NY I would have played more with 6.7s... however 6.7s have tiny rods compared to the 6.0s and 6.4s... I wouldn't have pushed those too hard...
Shame the general public is ignorant and fears diesels. If high MPGs is what one seeks. If high miles and longevity is what one seeks. Coupled with clean exhaust.
Diesels.
Ditch the trashcan of doom that Destroys Pickups Fast and the EGR system. Fine Tune it on a dyno. Mid to high 20 mpgs+ out of heavy pigs with the aerodynamics of a brick.
What the general public does not understand with diesels is if the focus is made upon the combustion event, to maximize the absolute most complete combustion. Emissions are reduced. Same with gasoline. The side effect is increased power output. Couple increased power output with rapid acceleration to cruising speed followed by barely any throttle to maintain said cruising speed. MPGs increase. Drastically.
I've proven it with scan tools running datalogger. Most of the complaints when 6 speed autos came out were from boomers who have grown complacent to 3 and 4 speed auto slush boxes. 99% of warranty concerns that forced Ford Motor company to update PCM strategy, came from baby boomers who made such ridiculous claims as
"Muh transmission is falling out of this thing!"
"It's constantly hunting for gears!"
"It's gonna blow my motor!"
"Check the vacuum servo! And kick down cable"
wait what?
I'd drive their 5.0 or ecoboost F150 and not have any issue what so ever. Adaptive strategy. I could not repeat their concerns. Not a single time could I ever repeat their concerns. Then again. I don't drive like I'm driving miss daisy.
But when I'd drive like they did. Dogging it to cruising speed... especially up a grade?
Oh yeah. BANG and get violent down shifts with it revving to the moon.
When I'd have some ride shotgun and show them how I drive and can't get it to repeat their concerns? They would scream and shout and tell my service manager to fire me for I beat their status symbol like it owed me money. ESPECIALLY when I showed the ecojunk owners how to achieve higher MPGs...
Gone are the days of cast iron cranks that can't hold up. Gone are the days of loose tolerances that result in severely worn internals.
If. IF I can blow your chit up in Stock form? That thing left the assembly line with something loose or deformed.
Bring up data logger. Show ignition dwell. Show knock count. Show grams per milisecond. Mass fuel desired. Mass air flow. 02 and other PID data.
Show them what being thrifty at the pump using craptastic 87 octane yeilds coupled with their driving habits vs mine. Then have them bring it back on empty and fill it with 91 or 93 and repeat the same.
Just changing their driving habits alone hand calculated picked up 2-5mpg and didn't result in transmissions downshifting from 6th with the torque converter locked to 2nd or 3rd. I give credit where credit is due, Lexus. The Lexus ISF was the first vehicle I know of, that actually rev matched down shifts. Had Ford done the same for the F150? Boomers complaints would have been non existent and Ford would have saved a ton of money with warranty pcm updates and paying for diag.
The boomer is old fashioned. They do not know modern vehicles are fuel injected and refined. They still think pumping a gas pedal will aid in cold starts LOL
Gas pedals are merely a lever connected to a switch! LOL there is no throttle cable. No carburetor! But they will insist their carburetor is out of whack...
See back in their day... they grew up with a glorified toilet atop of an intake manifold that constantly burned fuel and constantly had spark events at TDC whether accelerating or decelerating.
Their automatic transmissions were primitive at best. 2 speed power glides, 3 speeds and 4 speed slush boxes that had vacuum and mechanical linkages to increase line pressure and yeild a desired shift point.
Modern vehicles? It's all done based upon inputs and calculated load.
One thing the boomer hates most? Feeling upshifts.
This is why modern pickup trucks kinda suck. They're built to appease boomers.
Muh soft seamless shifts.
See.... they lost their land yacht status symbols. The Cadillac Deville the Lincoln Town car.
So they buy fully loaded half ton crew cab pickups. Lazy boy recliners for front seats. Rear leg room ample for leggy 6ft+ tall foxy models. Faux leather and heated/air conditioned seats.
They are the squekiest wheel. They get the grease.
So as a result... manufacturers concentrate on meeting CAFE EPA and boomers driving miss daisy.
They are literally trying to do too many things all at once resulting in premature transmission failure.
Duty cycle the solenoids.
Lower line pressure and holding pressure.
Massage clutches etc instead of full on/off engagements. God forbid Marv and Ethel feel an up shift! Clutches get spanked. Internals prematurely wear. Transmission fluid temperature rises... Transmission filters clog with clutch material from both torque converters and internal clutch packs...
Both GM and Ford 6 and now 8 and 10 speed automatics are great as is. But. They're neutered through factory programming to get
1. Increased MPGs per .gov mandates.
2. Soft seamless shifts.
3. Terrible application of clutches bands and sprags.
Don't take my word for it. Get scan tools with the ability to log data and see for yourselves. Then change your driving habits and compare contrast.
You'll find when you bog around p*ssy footing to desired cruising speed consumes far more fuel than wide open throttle followed by barely any pressure on the long skinny one on the right as you've
1. Got up to speed in a shorter time and distance
2. Locked torque converter sooner and decreased mass fuel desired
3. Remained at cruising speed for a longer period of time with a light load.
This is most noticeable for both the ecoboost and any V8 half ton pickup. Be it Ford Mopar or GM.
V6 chitbox pickups are gas hogs. Regardless what the rear differential and tire/wheel combo is. They're constantly "working" trying to move a hefty vehicle. Never mind towing and hauling. I've had a very loyal customer from western MA. He owned a fleet of trucks for his employees to use. His personal truck a 2010 6.4 king ranch that I built to the hilt for, he complained most of his fleet pickups couldn't average better than 15mpg. ALL were a mix of Fords, GMs, and Mopars with V6s. He didn't want to supply them with V8s thinking they'd beat the crap out of them and do burnouts etc. Which is a legitimate concern I could have sympathized with.
Those trucks averaged 80 miles per day mostly on the highways.
When he traded them up to V8s as I had suggested...
His fords were traded up to 5.0s
Chevy and GMCs to 5.3s
Mopars up to 5.7s and a couple 6.4s.
All rubber floors vinyl bench seats manual transfer cases. He noticed an increase to an average of 18mpg.
And then there's the curious case of econoboxes and midsized sedans.
With how I drive? I get a best of 15mpg out of a modern 4 pot and v6 sedan.
Those in theory should yield far higher than that but don't... I wonder if the weight and lack of power has anything to do with that? Just like V6 camaros chargers challengers and mustangs.
Some engines are simply inherent gas hogs like the 4.0 that was shoved in every Ranger and Explorer.
The older 3.8s in mustangs. I proved that one to my father when he wanted to buy my mother a mustang convertible for their anniversary. Back when it was either a 3.8 or 4.6... the 3.8 was a gas pig. The 4.6 sipped gas.
Momma got a GT convertible in 03 and again in 08.
Pops wanted a toy. He bought an SSR.
I built my toys. And because he had a convertible pickup... well I had to have one too.
85 C10 meets sawzall.
No roof. No roll cage. No fear. I could out corner 911s at limerock with it. Got the boot from there and Lebanon valleys drag strip for running a faster time than permitted without a roll cage
If you couldn't tell by now...
Engines. Transmissions. Differentials. Firearms. All things mechanical are my thing.