Long Periods of Running Wide Open Throttle

[galaxyjb]

Normally I don't find the 2.5L so bad, even on the highway. But coming back from a trip this weekend into a 30 mile per hour wind while going up hill just took everything it had to try to hold 65 on the highway.

So how tough are these little engines? I had to drop down to fourth and run wide open for a good min or so at about 3200rpm while going up the hills. Temp, Oil Pressue all were normal. Is doing this going to be a problem?

TIA
JB

[Jerry Bransford]

I wouldn't be concerned with that RPM at all.

[Combatsylvania]

Originally Posted by galaxyjb

Normally I don't find the 2.5L so bad, even on the highway. But coming back from a trip this weekend into a 30 mile per hour wind while going up hill just took everything it had to try to hold 65 on the highway.

So how tough are these little engines? I had to drop down to fourth and run wide open for a good min or so at about 3200rpm while going up the hills. Temp, Oil Pressue all were normal. Is doing this going to be a problem?

TIA
JB

they are meant to run... i came home yesterday after getting 31's put on my SE (mine is a 2.4 tho) and ran 3000-3500 and higher, for a lot longer.

remember, that 2.5 is in its power band above 3000rpm.. its meant to do it..

change your oil when its due, other than that.. 4 bangers are meant to scream... its actually good for them...

dont be afraid to drive it like a rental.. it will thank you for it.

PS: make sure its maintained, and put the new timing chain in when it calls for it

[Jerry Bransford]

Originally Posted by Combatsylvania

PS: make sure its maintained, and put the new timing chain in when it calls for it

The steel timing chain won't need replacing until it's time for a major engine overhaul.

[hoseclamp]

In my 35' RV, it has a 460, 5.13's, when running the moutain range it will see WOT for up to 1/2 an hour, maybe more. Talk about leg cramps!!

[rljsrubicon]

The last trip to the south west in my 97 4-cyl was much like you describe. I believe I put at least 2500 miles on it at WOT in 4th. I don't believe it hurt it much, but it soon just gave up at about 90K. It was a good jeep/engine and was ran hard it's entire life, so I believe it was "natural causes".. Ron

Originally Posted by galaxyjb

Normally I don't find the 2.5L so bad, even on the highway. But coming back from a trip this weekend into a 30 mile per hour wind while going up hill just took everything it had to try to hold 65 on the highway.

So how tough are these little engines? I had to drop down to fourth and run wide open for a good min or so at about 3200rpm while going up the hills. Temp, Oil Pressue all were normal. Is doing this going to be a problem?

TIA
JB

[LeBeteNoire]

I have a 98 2.5 and the power band is from 2k to 3k any over 3k and the engine just screams with no apparent increase in power. I used to run mine past 3.5k on the highway to keep up with traffic but since having the engine blow and replacing it I try not go over 3k and to hell with keeping up in traffic, on the plus I can hear the radio now though. I don't know if running her over 3k blew the engine or not as when I swapped the engines it appeared that one of th exhaust manifold bolts was out and caught in the pipes right where the piston let go. I have 32's btw and stock gearing with a manual. she was pretty heavily run off road before I got her and maintenance was not something she had experienced; it's amazing what I know now and I should replace her with a 4.0 L that is newer and less beat up but I can't do it she's my precious.

[galaxyjb]

couple of positive replies and a couple of not so positive replies...I suppose I'll just keep the hammer down and what happens, happens

[xxxflhrci]

You aren't going to hurt it.

I bought a 17.5 ft I/O boat 11 years ago. My "tow rig" was a 1994 Toyota Extra Cab 4wd with the anemic 22RE 112 hp four banger. To hurt matters, the truck has 31's on it. Towing the boat on any grade requires a shift to 3rd to keep it at about 60-65. She is screaming at about 5k rpms. Back then, the truck had 30k miles on it. I told myself if the truck lasted another couple of years, I would upgrade. I still have it. It is still what I tow my boat with. I still rev it up tight on grades. It has 141k miles on it now. I wouldn't worry about reving a 4 banger Jeep up to 3-4k to make it up long grades.

[bikerman02]

thats nothing i used to have an 02 SE and 3000 rpm is were ya **** it just driving normally with 31's.

[notmyj]

Originally Posted by xxxflhrci

You aren't going to hurt it.

I bought a 17.5 ft I/O boat 11 years ago. My "tow rig" was a 1994 Toyota Extra Cab 4wd with the anemic 22RE 112 hp four banger. To hurt matters, the truck has 31's on it. Towing the boat on any grade requires a shift to 3rd to keep it at about 60-65. She is screaming at about 5k rpms. Back then, the truck had 30k miles on it. I told myself if the truck lasted another couple of years, I would upgrade. I still have it. It is still what I tow my boat with. I still rev it up tight on grades. It has 141k miles on it now. I wouldn't worry about reving a 4 banger Jeep up to 3-4k to make it up long grades.

I had a 2wd 1985 toyota pick up with the 22re, 2 barrel, 4spd manual. That little thing would'nt die!!! The valves would float at 7200rpm, but it would just keep going. I knew a guy in college who had one in a lifted toyota on 33's. He added 10:1 pistons, a cam, and carb. That thing would run damn good!!!

The 22re will last forever.....