Factory V8

[steffen707]

Are you constantly towing something? lol
In my Sport S I'm averaging ~19.7mpg and only drive city / rural city. I have the stock 32" tires, but still..

lol, i think its letting it run for 5 min before work everyday. =( but in summer I could get much better.

Sponsored

 

[brancky3]

I was just commenting to my wife last night that "I don't get why people are wanting or swapping to a V8"... I own a low 11 second/high 10 second vehicle...and yes...it's fun, but I don't romp around everywhere I go in it. I supposed in a "Truck" it would be more necesarry but when I see people dropping in a Hellcat crate motor in...I keep thinking that isn't going to do what a truck is supposed to do. Maybe I am wrong. I have never had a need for a V8 in my life. Been plenty fast with turbo 4's and 6's.

Damn, Nissan Leafs are faster than I thought!

 

[Yellow1098]

I also have a 10 second muscle car....I never understand that either for a car like the gladiator ...the hell cat gladiator still isn't fast to me..weighs to much...going fast is about more than just power...suspension and brakes and controlling the power makes it fun....you gonna running sticky good traction tires on a glad? No I 35's haha....the suspension and aerodynamics are awful for power....in trucks I get it's always been about tow capacity and the glad does pretty well in that already....well for my use

 

[brancky3]

I also have a 10 second muscle car....I never understand that either for a car like the gladiator ...the hell cat gladiator still isn't fast to me..weighs to much...

Yep, seriously... the hellcat Gladiator does 0-60 in like 5.7 seconds if I remember right? I'm fine with a slow truck and a fast bike

 

[Yellow1098]

Yep, seriously... the hellcat Gladiator does 0-60 in like 5.7 seconds if I remember right? I'm fine with a slow truck and a fast bike

Exactly! 20-25k to still be slow.....I know for a fact a lot of guys want it just for the sounds....get yourself a good exhaust

 

[Br4hm4]

Damn, Nissan Leafs are faster than I thought!

lol not the leaf. The Slingshot is quite a bit faster than most people think...especially after installing an aftermarket turbo kit and all the supporting mods. 1900 lbs and 300+ HP moves as quick as most sportbikes I have run. lol

 

[jalbrecht55]

Yep, seriously... the hellcat Gladiator does 0-60 in like 5.7 seconds if I remember right? I'm fine with a slow truck and a fast bike

I think there’s a fun factor with the v8, the sound and the feel that is hard to capture with numbers. I have a 5.7 in my JGC and it’s fun! If I could have more power I would. I don’t drive fast but I like having the effortless power on tap. Point and squirt; it goes. My buddy has a 1927 solid axle ford roadster with a 400hp 396 BBC.... fun as heck and we rarely have that thing much over the speed limit. Gets squirrelly over 70 and 100mph is.... a trip. But around town or out on country roads it’s a blast.

As for mileage they are working wonders these days with MDS and valve timing and other tweaks. I’ve seen 24mpg on road trips in the JGC, and routinely 21hwy. (But only 16mixed/typical). My buddy has a 2003 ram/5.7 (one of the first year 5.7’s) and at steady state 55mph on flat ground it reads 13mpg all day long, and this was back when it was a year old.

I still can’t see them putting the 5.7 in the JT but a person can hope. I don’t know how long the I6 will be but I still think that’s more likely.

 

[ShadowsPapa]

I was just commenting to my wife last night that "I don't get why people are wanting or swapping to a V8"... I own a low 11 second/high 10 second vehicle...and yes...it's fun, but I don't romp around everywhere I go in it. I supposed in a "Truck" it would be more necesarry but when I see people dropping in a Hellcat crate motor in...I keep thinking that isn't going to do what a truck is supposed to do. Maybe I am wrong. I have never had a need for a V8 in my life. Been plenty fast with turbo 4's and 6's.

I also own such a car - and if I do try to use the V8 power I'm either going to kill someone or draw unwanted attention from certain officers keeping the law and peace.
About 12 mpg on a good day - I had to add Caltrac bars to keep the thing going straight.

I know this is comparing old tech - but one reason I traded in my 95 Ford with 351 was that it was a dog pulling a load. I couldn't maintain speed limit on the 4 degree grades on the interstate near me, the fuel economy sucked - 12-13 loaded, unloaded, towing, not towing, head-wind, tail-wind, that's about all it would do. Got the Silverado with the 5.3 LS and it could maintain speed hauling 5500 pounds behind it but it had to drop a gear or two and wind up into the 5,000s to do it - fuel economy - about 11-13 towing, I got 21 once doing 55 on the level for a few miles with no load at all.
So if the JT Overland can do that - and interestingly - when I romp the JT to merge into freeway traffic at commute time - it will do better than that Chevy did......... if it's even close to the others, I'll be happy.

If I want pure, raw, HP, noise and tire shredding power, get there in half the time - I'll drive this -

 

[ShadowsPapa]

I think there’s a fun factor with the v8, the sound and the feel that is hard to capture with numbers. I have a 5.7 in my JGC and it’s fun! If I could have more power I would. I don’t drive fast but I like having the effortless power on tap. Point and squirt; it goes. My buddy has a 1927 solid axle ford roadster with a 400hp 396 BBC.... fun as heck and we rarely have that thing much over the speed limit. Gets squirrelly over 70 and 100mph is.... a trip. But around town or out on country roads it’s a blast.

As for mileage they are working wonders these days with MDS and valve timing and other tweaks. I’ve seen 24mpg on road trips in the JGC, and routinely 21hwy. (But only 16mixed/typical). My buddy has a 2003 ram/5.7 (one of the first year 5.7’s) and at steady state 55mph on flat ground it reads 13mpg all day long, and this was back when it was a year old.

I still can’t see them putting the 5.7 in the JT but a person can hope. I don’t know how long the I6 will be but I still think that’s more likely.

My wife's 2018 JGC with the 3.6 and her driving will do 26 average on a trip, she's hit 27 with it - and it's no slouch, but hey - a Jeep "SUV" isn't about drag racing or truck pulls.

 

[Choj]

lol, i think its letting it run for 5 min before work everyday. =( but in summer I could get much better.

In the summer I get around 17-18mpg in my JKUR and in the winter I get 13-14. Damn winters in Wisconsin keep on getting colder and I keep on letting my Jeep run longer before driving lol.

 

[TrailHiker]

Also, from what I understand, larger cylinders develop more torque than smaller cylinders in an engine, so wouldn’t a larger cylinder 6 develop more torque than a smaller cylinder V8, given equal total displacement?
Trucks started out with larger block, big cylinder engines, like the old flat four and flat six, and had lots of torque power (but not speed).

My brother had a CJ2 with a small Chevy V8 in it, and it did not perform much better than the original four, going up the side of a sand dune, just got up a little faster, but was hard to control in rocky technical trails. Don’t ask about MPG, I got around 10 MPG or less, driving around town, out in the desert it was even less. We had to pack in extra gas for it.
Cheers

 

[ShadowsPapa]

Also, from what I understand, larger cylinders develop more torque than smaller cylinders in an engine, so wouldn’t a larger cylinder 6 develop more torque than a smaller cylinder V8, given equal total displacement?
Trucks started out with larger block, big cylinder engines, like the old flat four and flat six, and had lots of torque power (but not speed).

My brother had a CJ2 with a small Chevy V8 in it, and it did not perform much better than the original four, going up the side of a sand dune, just got up a little faster, but was hard to control in rocky technical trails. Don’t ask about MPG, I got around 10 MPG or less, driving around town, out in the desert it was even less. We had to pack in extra gas for it.
Cheers

Longer STROKES develop more torque. That's one reason we mix the 258 and 4.0 parts to build "strokers" - you get more torque for sure, and of course more HP in the end. The fellows running the older Jeeps - check out their stroker builds.
If you could get more torque simple from a larger displacement, then everyone would be boring them .040 or .060 over. That will gain HP, but do little for torque. (my 360 does 377 hp - it's bored)
A square engine, where the bore and stroke are about the same is among the smoothest and best compromise to get HP and torque.
But if you want more torque you add stroke - not bore.
This is because the longer stroke is like pushing on a longer lever, the combustion gases have more mechanical advantage.
Your talk of the older engines - check the stroke specs. The reason they were tall and the hood lines were high on the car was the height of the engine to handle the long rod and crank throw.
The longer stroke has disadvantages - higher hood line, more wear, slower speed (can't get the RPM out of 'em) and other things I won't get into detail on. People wanted more POWER, go faster and sleeker cars, so cut the stroke, increase the bore, you get more power and speed and lower the hood line.
Good examples are farm tractors - I had a 1936 F20 and the stroke on that thing was crazy long - and at idle I could sit back and let it walk up hills. The looong stroke gave it the ability to be really hard to kill at very low speeds. Rated at a bit under 20 hp at the belt pulley. It was a tall engine.

 

[Texops]

I also own such a car - and if I do try to use the V8 power I'm either going to kill someone or draw unwanted attention from certain officers keeping the law and peace.
About 12 mpg on a good day - I had to add Caltrac bars to keep the thing going straight.

I know this is comparing old tech - but one reason I traded in my 95 Ford with 351 was that it was a dog pulling a load. I couldn't maintain speed limit on the 4 degree grades on the interstate near me, the fuel economy sucked - 12-13 loaded, unloaded, towing, not towing, head-wind, tail-wind, that's about all it would do. Got the Silverado with the 5.3 LS and it could maintain speed hauling 5500 pounds behind it but it had to drop a gear or two and wind up into the 5,000s to do it - fuel economy - about 11-13 towing, I got 21 once doing 55 on the level for a few miles with no load at all.
So if the JT Overland can do that - and interestingly - when I romp the JT to merge into freeway traffic at commute time - it will do better than that Chevy did......... if it's even close to the others, I'll be happy.

If I want pure, raw, HP, noise and tire shredding power, get there in half the time - I'll drive this -

I want that with a built 401 in it awesome car man

 

[ShadowsPapa]

I want that with a built 401 in it awesome car man

Thanks - I love it.
I have a 401 I have had for 4 or 5 years sitting on a stand in my shop all covered up (along with a 343 and most of another 360) - need to rebuild it and have it ready for this car. I have Scorpion rollers for it and other odds and ends.
Also have a spare TF727 I plan on building so one of these days, I'll actually do it and swap that into the car. Nice thing is that the 401 will drop in and use the same headers and - well, you know - nothing changes. Same externals.

 

[Texops]

I remember my 1st brand new vehicle a 1983 Jeep CJ-7 Renegade in Copper head. It had a 258cid straight six cylinder (4.2) for those young folk. 112 HP . But it weighed 3200# 5 speed and good torque down low. Had it 12 years a daily driver never wanted more power.

Sponsored