Building a 10,000 RPM Jeep 4.0
- Thread starter Brianj5600
- Start date
My, my. People here sure are sensitive! Not hating on anybody, just making observations. "Just the facts, Ma'am." Since you bring it up; power steering really isn't needed on many smaller vehicles, and I know how to drive larger ones without it as well. Not that I'd necessarily want to, but I can do it. And yea, its nice to have it off road.
You're right about avoiding getting hit - but in an ideal world, the people behind me would be paying attention instead of talking/texting/whatevering on a fucking smartphone. Like I said, 68 was fine, 100 is better, 150 is a waste.
IMO, you're fighting an unnecessary battle.
Also, you aren't simply providing "the facts" so it's inaccurate at best to make such a claim. You're giving us your opinions based on your observations and experiences.
It's fine that you enjoy the acceleration and typical highway speeds of a semi-truck, but you are not in the majority nor does your vehicle have the mass of those rigs —> which puts you at greater risk than the big rigs if things go awry.
I don't enjoy being passed by semi trucks when going up hills and I don't enjoy causing traffic problems when trying to merge my Jeep onto busy highways. I'm pretty mindful of my surroundings and my effect on others around me, and my rig has sometimes been an additional stressor when trying to merge onto the I-10 in Tucson (a relatively tiny city).
I prefer to operate seamlessly/efficiently/safely in traffic rather than assert my existence in the world at the expense of others' time or safety.
To parallel your previous examples, would you also like to tell us about your old dial-up internet and how anything above those speeds is a waste? I'm having fun now, but seriously this is a silly conversation.
You're being obtuse, I'm not "fighting" anything. I'm done here. Anyone else who doesn't try to twist my words from the queen's english is welcome to comment. My TJ has ZERO problems getting up to speed, the problem is idiots in 400+ HP monstrosities in front of me who insist on going 35 to merge with 70 MPH traffic. If people knew how to fucking drive, even 68 HP will get you to 70 MPH at the bottom of most onramps.
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she died fyi.. it's king's english now
FWIW, in the first video the guy says he was working with a 2.4 4 cylinder before moving to the 4.0. Says it produced 70hp. It was anemic. That was the late 1970’s.
It’s not all about the destination. It’s also about the journey to the destination. Both are discussable.
Thanks Brianl5600- a couple hours of entertainment- Youtube took me down the 4.0 rabbit hole- watched this series and then watching engine pulls from new comer racing- Not sure what I would personally do with this but some interesting things I noted
- cost savings on the crank balance means the 4.0 gets some harmonics issue at 5700 rpm ( might explain that hard shut off the ECM at the low 5000 rpm range on my Jeep.
- Get a proper balancer and 7000 rpm is doable on the stock components- makes you wish that Jeep opened up the range but also supports those discussions the motor is fine keeping the RPM up when pulling those long uphill grades.
- The heads can take up to .110" - .150" shaving- am I remembering that right? Jeez you could get a couple of compression points with that info
- Another testimony on why I like Redline oil.
LONGJP2
TJ Expert
The harmonics are an overblown issue. Sustained rpms in that range might be no bueno, but ripping up that high running through a few gears isn't going to make it esplode (from harmonics at least). You won't be making any power with a stock head, but it won't immediately grenade. I run mine to 6k frequently.
And on this general discussion, unless we are talking about slinging mud/sand, transfer case or axle gearing for low speed power and control is what most of us need in for off road applications. For street driving though, engine power is something most lifted, big tired TJ owners could use more of. Of course you still need appropriate axle gearing for your tire size, but that will only get you so far i.e. gear a 4 banger for 37's and go drive it on the highway. It's still gonna suck.
People who poo poo turbos for example because "they have no low end torque which is what our jeeps need" have no idea what they are talking about.
I had a 79 Toyota Corolla,,,, for about a month, 1.3 L/ 79 cui, 59 hp / 72 lb-ft, It did not have AC and I lived in Houston. I put AC on it. It could not get out of its own way.
Power is fun. I like fun
I found this cool website
https://www.automobile-catalog.com/..._sahara_4_0l_hardtop_automatic.html#gsc.tab=0
Power is fun. I like fun
I found this cool website
https://www.automobile-catalog.com/..._sahara_4_0l_hardtop_automatic.html#gsc.tab=0
I had a fluid dynamics professor in college that liked to tell the story about how he grew up in Duluth MN and drove a Volkswagen Beetle with I think he said 30 HP. The problem was he said in Duluth winters it took 29 HP to turn it over.
I am being told the 4 cylinder motor in a CJ-3B doesn't have enough extra horsepower to run a power steering pump so it is best to leave it manual steering. I'm not entirely sure I can disagree.
Those bullshit perceptions are precisely why I installed a super charger. If you haven't driven one with forced induction, you really need to just sit over there and let the adults chat.
The single most surprising thing to me was just how invisible and transparent it is daily driving it. If you never put your foot in it, you would never know it had a lot more power than you suspect. That is unless you knew to watch the boost gauge and pay attention to the boost rising to pull hills with the same throttle input. Very interesting that.
A key point in the horsepower levels of old is that a lot of the cars weighed a lot less. My first car was a 1985 Toyota Celica, with a 105hp 22R-E. I didn't hate it, but the published curb weight on those has a range starting at 2100 pounds. Their closest equivalent current model is probably the GR86 which starts at 2800 and is basically featherweight by today's standards. The current Nissan Z starts 800 pounds heavier than the heaviest of the Datsun S30 (240/260/280).
And if you say "well we should make them weigh less", then I say, you go first. I don't want to be putting around in 2200lb car surrounded by 6,000 behemoths unless I've got all the power I need to get out of their way. IMO 10lbs/hp max for a car that small...about half what we have in a TJ.
And if you say "well we should make them weigh less", then I say, you go first. I don't want to be putting around in 2200lb car surrounded by 6,000 behemoths unless I've got all the power I need to get out of their way. IMO 10lbs/hp max for a car that small...about half what we have in a TJ.
I don't understand why all IC engines don't have a supercharger like what came on the Olds Aurora. It can't add that much cost