What happened to less is more? I mean, cool and all, but sheesh
Future engine swap for my 98 TJ?
- Thread starter dan lee
- Start date
Ok so let me thread jack a bit if I may. It is on topic though I think. I have a 4cyl manual 99’ with standard 3.73(?) gearing. It has a 4” lift and 33’s.....would changing the gearing help me...and if so to what?
It sure would! I have a 2000 TJ with 4.0 with the 5 speed. I went with the 4.56 gears and it made all the difference in the world. With you having the 4 cyl not sure if you should go with the same gears or something a little different (lower).
So...I looked at the link...not sure if you linked the wrong one, but you do have to bore the block 0.030 over. They must be really pitchip the C.R. to get 4.7L out of only a 30 over bore
5.13 and at least alloy 27 spline shafts in the back. You might get away with 4.88's and new stock axle shafts on the street. The 2.5 needs all the gear you can give it, and responds well.
Edited to add; You have 4.10/4.11 gears in your '99 currently.
I linked to the wrong one, oops!
Here is the correct one:
https://www.extremeterrain.com/scat-stroker-40l-96-1-1-96015bi.html
As you can see, it says "no boring required".
I'm not entirely sure if it requires premium, but that's my guess. I haven't seen the torque curve, but I've read nothing but good things about it.
They make two kits, one has a 9.6:1 compression, and one has a 10 to something compression. I ordered the 9 compression, so maybe that one can make due on regular gasoline... not entirely sure.
5.13's are what you want. And yes, it will make a significant difference. I didn't like mine with 31's and 3.73, and I have the 6spd which has lower gearing and the 2.4 which has a bit more hp & tq. I run 4.88's now with 31's.
9.5:1 is the average for pump gas...you go higher, and you are in to racing gas.
9.6 I think crosses over into the maybe Department. I said pump gas...which premium qualifies for. For regular, I think you want to keep your CR around 8.7.
Also, that kit only comes with a rotating assembly...what are you doing for fuel injectors? Cooling? Not to mention internal engine clearance...
You should do some reading on jeepstrokers.com
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115k is just getting broke in you take care of it. It’ll run well into 200’s. Do the gears and you’ll get some power back too
Yeah, I did a bunch of reading on that site. I am planning on running the larger injectors that they recommend. As far as cooling goes, I’ll look into that. This isn’t happening for at least a year, I just ordered the kit to have around in the meantime.
In that time, I plan on gathering all the other parts and info I need.
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