Sinking Creek 4WD Association

Damn, I can't remember what the redline was. I wanna say 4500, but I'm not positive. Someone should ask Cody, I've heard he knows where his is

shmoken875 wrote:

Jwlman wrote:

Arya Ebrahimi wrote:4.0, but the basic design is the same. To the point that the heads can be swapped.

Yea, I am gonna do that swap over the summer.

But I think the 4.0 has a much higher redline

5kish

5250 to be exact :o

and another vote for 513 ...

and x2 on the jeep 6cyl not minding high RPMs for extended periods ... hell, they even like to be bounced off the rev limiter once a week

Arya Ebrahimi wrote:Damn, I can't remember what the redline was. I wanna say 4500, but I'm not positive. Someone should ask Cody, I've heard he knows where his is

see above post :o

affende wrote:
5250 to be exact :o

and another vote for 513 ...

and x2 on the jeep 6cyl not minding high RPMs for extended periods ... hell, they even like to be bounced off the rev limiter once a week

x3 on the 6cyl not minding the high RPM's for extended periods ... i get my best mpg running around 3000 and the engine seems less effected by inclines in the road.

I would go with at least 5.13's. That is what I am running in my TJ with the 2.5L. With the 5-spd and 35" MT's I would run around 3k rpm at 70 mph in 5th gear. Now that I have the 36" TSL's I turn about 3k at 65mph in 4th gear. 5th gear is pretty much useless again. I just need to find the time and money for the V8 swap.

Lukipela wrote: x3 on the 6cyl not minding the high RPM's for extended periods ... i get my best mpg running around 3000 and the engine seems less effected by inclines in the road.

Mine would mind more then yours. The 4.2 is a whole different story

I can't believe the RPM's that some of you are turning on the highway, I'm running 2200rpms at 60 and I thought that was cranked up pretty hard, I can't imagine 3000. :shock:

Lukipela wrote: x3 on the 6cyl not minding the high RPM's for extended periods ... i get my best mpg running around 3000 and the engine seems less effected by inclines in the road.

shit ... i need your motor ... anything over IDLE and my MPG goes to shit :D

Jwlman wrote:
Mine would mind more then yours. The 4.2 is a whole different story

they ping a little in the higher RPM range ... but if it blows up, it just means you were driving correctly

I am pretty sure I will go with 5.13s. I can go 70 mph while spinning 2576 rpms and thats about as fast as I need to go.

If you are wondering how I figrue this stuff out, here is a great site

http://www.grimmjeeper.com/gears.html

What crawl ratios do you all have?

Mine is 42.62 and goning to be 53.2 with the new gears

Jwlman wrote:I am pretty sure I will go with 5.13s. I can go 70 mph while spinning 2576 rpms and thats about as fast as I need to go.

If you are wondering how I figrue this stuff out, here is a great site

http://www.grimmjeeper.com/gears.html

What crawl ratios do you all have?

Mine is 42.62 and goning to be 53.2 with the new gears

ewww only 34.6:1, if I got a 4:1 kit it could be 51:1 hmmmmm.

I wouldn't trust the speed portion too much james. On my way down here I got that ticket for goin 80, and I was turning 3000, the chart says at 3000 I'd be doing 91

shmoken875 wrote:

Jwlman wrote:I am pretty sure I will go with 5.13s. I can go 70 mph while spinning 2576 rpms and thats about as fast as I need to go.

If you are wondering how I figrue this stuff out, here is a great site

http://www.grimmjeeper.com/gears.html

What crawl ratios do you all have?

Mine is 42.62 and goning to be 53.2 with the new gears

ewww only 34.6:1, if I got a 4:1 kit it could be 51:1 hmmmmm.

I wouldn't trust the speed portion too much james. On my way down here I got that ticket for goin 80, and I was turning 3000, the chart says at 3000 I'd be doing 91

Did you make sure to click the auto tranny box?

edit: that button dosen't seem to make a difference so I don't think it accounts for the slip in your auto tranny

54.31, stock

If I were you I'd stick with a higher axle ratio and gear down the t-case, or even a tranny swap for a low first gear. It sounds like you don't drive on the highway a lot, but for the times you do it'd be nice to cruise at a more reasonable RPM. Plus, you'll probably get a lower overall crawl ratio if you go with t-case gears or a lower first gear.

all the cool kids are in the 400:1+ club

one day, for shits a giggles, the buggy will be 455:1

3.9 1st gear, 4.7 transfer case, 4.7 doubler, 5.29 diff gears


mmmm ... so slow it gives me a chubby

VerticalTRX wrote:54.31, stock

If I were you I'd stick with a higher axle ratio and gear down the t-case, or even a tranny swap for a low first gear. It sounds like you don't drive on the highway a lot, but for the times you do it'd be nice to cruise at a more reasonable RPM. Plus, you'll probably get a lower overall crawl ratio if you go with t-case gears or a lower first gear.

Hmm, stock it should run at 2000ish at 70 mph. With the 5.13 it would be 500 above that. Kinda a big jump

Guess I need to build up a dana 300 too

Jwlman wrote:

VerticalTRX wrote:54.31, stock

If I were you I'd stick with a higher axle ratio and gear down the t-case, or even a tranny swap for a low first gear. It sounds like you don't drive on the highway a lot, but for the times you do it'd be nice to cruise at a more reasonable RPM. Plus, you'll probably get a lower overall crawl ratio if you go with t-case gears or a lower first gear.

Hmm, stock it should run at 2000ish at 70 mph. With the 5.13 it would be 500 above that. Kinda a big jump

Guess I need to build up a dana 300 too

and some Mogs