I was wondering the same. Also, since these 4.0s are known to have skirt issues, 6K sounds scary.
Dyno Testing Bolt-ons On The 4.0
- Thread starter Jezza
- Start date
I was wondering the same. Also, since these 4.0s are known to have skirt issues, 6K sounds scary.
Blaming the 4.0 is a common misconception. Jeeps have been bouncing titties and blowing skirts up since the 40s.
You can read about people having cracked/broken skirts in stock engines here and other forums. It seems to be more common in these 4.0s than any other stock engine that I've messed with. I haven't had the issue, so I’ve never had to go down that rabbit hole figuring out why. From what I've been told and read, skirts tend to break because of bad/wrong material and/or excessive tolerances (rocking).
Looks as though the speed is limited in this PCM at 112mph or MACH 0.15
This '97 has a replacement Wranglerfix PCM in it from a few years back before I owned it, so that limiter may be different than stock.
This '97 has a replacement Wranglerfix PCM in it from a few years back before I owned it, so that limiter may be different than stock.
You must have a feather foot.
Damn no respect....
I was known to rev my 4 angry squirrels up to the redline more than once... But I did say most members... But then I guess the members who are watching this thread aren't "most" members... I'm just going off the number of people who say they never rev their 4.0 above 3K RPM's and wonder why it's so slow.
The stall convertor in my LJ is 3500, so it's usually above 3k.
nashvilleTJ, I would like talk to you about you tire carrier, is there a way to message you directly?
The forum supports direct messaging, but you may need a minimum number of posts (maybe 20?) to see the option. Hit me up over on my build thread:
https://wranglertjforum.com/threads/nashville-tjs-build-continued.42035/
But you don't have a stock transmission correct? What is the stall on a 42RLE or 32RH?
My point was that I was trying to make is getting the HP & TQ numbers where most of our Jeeps operate at as opposed to the normal dyno runs that are mainly showing peak HP & TQ. Most of us drive between 2k & 4K RPM's on the street I'd think. But then I could be wrong too...
No, I have the 6R80 and the first gear is super low, that's why I went so high on the stall. Realistically because of the low gears and the lighter weight of the Jeep vs the Navigator it came out of the stall starts to flash around 2500 making it only slightly looser than stock. The 32rh in this '97 flashes at 1800-2000 rpm according to my tests.
It's really closer to 2500 with the low gears and light weight of the Jeep vs what the trans was born in. On the transbrake it holds about 3200ish.
While I'm sure it'll be said again I want to thank you for doing this... Doesn't matter that I don't have an dog in this hunt...
One of us needs to bring a Hemi powered Jeep to ya...
One of us needs to bring a Hemi powered Jeep to ya...
Definitely would be cool to see a V8 on Jezza's dyno...
...and it would have to be a Hemi. An LS would never turn that big drum.
Definitely would be cool to see a V8 on Jezza's dyno...
Well I want/need to dyno mine some day..... When I start traveling TX is on my route...
...and it would have to be a Hemi. An LS would never turn that big drum.
That went without needed to be said... Don't want to shame anyone ya know.
The early tj had light valve spring pressures. I don't know what other years wound up with
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