Topic: 4Banger Jeep Speed (Ha! :)

[chrisfranklin]

Was having a heck of a time trying to maintain 70+mph going to Vegas and back over the weekend.  Altitude, hills, weight of new armor, the slightly larger tires than the old ATs probably didn't help things along in that regard. 

But it's getting kind of embarrasing (maybe even dangerous) not being able to at least keep up with traffic.  And, heck, most people were whizzing by me doing 80-100mph.  (I also saw what must have been some kind of Nissan Skyline (sorry "GTR") club/group fly by me presumably going to Vegas. And they were driving 5 GTRs in a line and were probably doing 120mph on the I15 North)

I've still got the D35 in the back end and I wasn't looking to re-gear until I had something stronger -- maybe a D44 - back there.  Supercharger is a bit more than I want to spend on this old heep w/170k on the clock and it would probably over-power the tranny and the D35 in short order anyway. 

Frankly, I might head down to Turbo City in Orange County and get those guys to hook this heep up to a computer and make sure the everything checks out Air/fuel wise; the intake "creation" I've got might be throwing things off at highway speeds.

Not looking to add headers until the stock manifold cracks, but I might end up doing it; same with the electric fan business.  Am I missing anything?  Otherwise the vehicle is well maintained.


   

[rubberducky]

my 05 stock with 33's and 2 inch lift can hold 70 with trailer of gear for hunting. have to shift alot and run higher rpm in lower gear to keep it. I have throttle body spacer and chip. heavy 4inch steam pipe bumpers front and rear with winch. I never use sixth, mostly run fifth. I have two sets of tires 33-12.5 and 285/75/r-16, the 285's roll easer and are about 9.5 to 10.5 inch wide so that does help. I take alot of road trips about 2-300 miles and I usually bite the bullet and draft people, or find a fast trucker and talk him into letting me draft him on my CB.

[Mozman68]

I have the odd 4-banger that seems to run fine on the highway...always in 5th...running 75 mph most days...could go more, but I choose not to.

Only problem I ever have is on windy days....no real hills to speak of here.

35's with 4.88 gearing and a lot of extra armor/weight on there.

[Jesse-James]

The injector swap did a world of good for me, I actually hit 80mph last week for the first time since I've owned it.

[chardrc]

electric fan gives a good umph back...

[TahoeYJ]

I have the odd 4-banger that seems to run fine on the highway...always in 5th...running 75 mph most days...could go more, but I choose not to.

Only problem I ever have is on windy days....no real hills to speak of here.

35's with 4.88 gearing and a lot of extra armor/weight on there.

I seem to have one of these odd 4 cyls as well 

I can easily maintain speeds above 70 MPH. Steeper, long-ish inclines are about the only thing that slow me down. Granted I don't have a lot of extra weight, but I still run around just fine.

Oh and when did you switch to 4:88's? didn't you originally go w/ 4:56's because you planned a motor swap down the road? Or did you decide to stay reliably underpowered and go deeper gear-wise 

[sharpxmen]

I seem to have one of these odd 4 cyls as well 

I can easily maintain speeds above 70 MPH. Steeper, long-ish inclines are about the only thing that slow me down. Granted I don't have a lot of extra weight, but I still run around just fine.

Oh and when did you switch to 4:88's? didn't you originally go w/ 4:56's because you planned a motor swap down the road? Or did you decide to stay reliably underpowered and go deeper gear-wise 

nothing odd about that, you should be able to maintain 75mph (120kph) with no problems - a lot of people get 31s and 33s and don't account for the speedo error.

[TahoeYJ]

nothing odd about that, you should be able to maintain 75mph (120kph) with no problems - a lot of people get 31s and 33s and don't account for the speedo error.

You make a good point, because I was able to run 70 in 4th with 33's and stock gears, not much more really but it could. Even on longer inclines it wasn't unbearable. All I have armor wise is a gas skid, ghetto homebrew sliders, and diff skids so I don't have a lot of extra weight. Switching from 15X10 steelies to 15X8 alloy wheels made a world of difference too. I also had ZERO performance mods except a K&N filter and exhaust. I've added some since then, but 4:88's was a great investment

I could even tow my trailer no problem with stock gears, it's a 5X8 open similar to this


Now I have no problem towing it with a light load at 65-70. I've had close to 1500 LB in it before and the 4 Banger definitely wasn't liking life quite as much 

[jfrabat]

I was also able to run 70mph on the highway without issues; I would sometimes have to downshift, but I could probably keep 75mph (I just never chose to run that fast).  I run 33's on 4.88's, have about 135K on the clock, and all the mods listed on the signature (which include bumpers, sliders, hard top, winch, etc.).

[Torch_Ind]

doing more then 70 mph for hours with stock set up on the engine "especially if it's getting tired" with lift and tires and armor is asking allot if you ask me. I run mine mostly around 60mph costing to 70mph down hill and with the winds and I'm running 4.88's, new engine, ported and polished intake, 64mm t/b, pacesetter header with 2 inch exhaust. I could run it faster it will do it but your running it really hard and burning allot more fuel just to get the extra mph out of it. and pulling a trailer I didn't find it any different if anything the extra weight would help you down hill and was about the same any other way your still a big tall brick in the wind lol.

you want speed to run to vegas grab a little sports car to speed down. like them gtr's.

[TrailsLessTaken]

Mine will run 85 all day long on the highway with a trailer....   

[smashcoast]

I have an odd 4Banger as well.

I only have 31's but can do 80+ and not much downshifting, only on major hills.

Mine seems to have a lot of get up and go as well. I can get up to traffic speed rather quick(maybe it's my Nascar like shifting?).

I shift around 3000 to 3500 so that helps out quit a bit.

[Torch_Ind]

I'm running 33x12.5R15's with were alot harder to turn then my 31x10.5R15's I could get more speed out of it before I went to the bigger wider tire.

[chrisfranklin]

I mean my 4Banger will do 80-85mph on flat highway and slight inclines the way it's currently setup.  But as soon as there is anything in the way of a mild hill to climb on the highway it feels like the fuel flow gets cut in half and I'm slinging down to fourth and even third in some cases. 

Zinging along in 3rd gear at 4500RPM just going 60mph when everybody else is doing 75-80 going up a mild incline in a posted 70mph zone just plain $ucks.  You guys will say that's the nature of the beast -- 4banger, tires, weight, etc -- but I still feel like something is "off" with the engine ("Yeah, it needs another 4 cylinders...that's what's "off" about it  )

[sharpxmen]

I mean my 4Banger will do 80-85mph on flat highway and slight inclines the way it's currently setup.  But as soon as there is anything in the way of a mild hill to climb on the highway it feels like the fuel flow gets cut in half and I'm slinging down to fourth and even third in some cases. 

same here, opposing wind too - funny how the top speed increases when you go the other way.