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xj mud racer

Old 11-10-2010, 07:42 AM
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Default xj mud racer

My wife has been mud racing the xj for two years now and has won a few and placed in the money alot. Most events has adopted the 4-6cyl class so it's time to get serious and build a xj for racing only. It's tough to race, trail ride and DD the same xj, it's just getting too heavy.

Here's a pic of her and her arch enemy Morris in a vortec straight axle (D30) blazer that alway's seems to beat her by a few tenths. He placed 1st and her second in the street stock class at this event.



http://s311.photobucket.com/albums/k...Picture421.mp4


Now here's the new project, It's a 90 xj that I'm swapping over to OBD2 and HO. It's gonna be stripped of every ounce I can shave off it, and still remain stock. I'm gonna lift the rear 3in and deseam the quarters that's why I went 2dr. The front will be 5in and cut to top of the fenders to fit 35/10.50 boggers and have 2in of rake for weight transfer. I have a D44 from a xj for the rear welded with 410's and a HP D30 open for the front. Any help on this project would be appreciated, I've never built a mud racer before but I'm thinking it's gonna be fun.



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Old 11-10-2010, 08:26 AM
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sounds like you are moving on the right track so far
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Old 11-10-2010, 09:49 AM
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what tranny does it have?

im definatly looking forward to this!!!
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Old 11-10-2010, 10:47 AM
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I dont know anything about building a mud racer, but this should be good to watch!
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Old 11-10-2010, 02:05 PM
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I'm gonna run the AW4, If the TPS reads WOT it shifts on the limiter. No way she can do any better manually shifting, plus it takes the human/wife error out of it..
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Old 11-10-2010, 02:11 PM
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yea i agree running the aw4 versus the ax15 is a better choice when running the bogs the manual shift just lets to mu torque drop and then you end up stuck with no forward momentum
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Old 11-10-2010, 02:14 PM
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the only thing that might hinder you will be the 4:10's with 35's its said that for 35's you wanna run 4:56 or 4:88 i know im running 33's with stock 3:55 gears and mine is sluggish off the line just food for thought
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Old 11-10-2010, 02:52 PM
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Sounds like a fun project! Perhaps consider another form of a Locke for the rear for strength purposes. Maybe even a spool. With the boggers, and gettin on it as hard as your wife will be soon, Im not sure wether the welded diff could handle it..
I'll be watching this one!
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Old 11-10-2010, 03:00 PM
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Good luck thats cool.
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Old 11-10-2010, 03:34 PM
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We run 410's and low range in the pits, works good with my 33 boggers and 34 TSL's she ran the last two years. If I need more gear I'll change to 456's in the rear only and that will let the front wheels pull you in a straight line. The good thing about mud racing is the launch area is alway's mud covered and getting enough bite is alway's a problem, that's why welding a good rear like a 44 usually is enough. I want to spend all my money in the motor and use all used parts on the rest of it.
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Old 11-10-2010, 03:44 PM
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sounds like a winner to me lol now the mud racing is it like a u shaped course with mud/water on it im trying to picture what exactly it is
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Old 11-10-2010, 06:11 PM
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1 word -








AWESOME!!! Subscribed!
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Old 11-10-2010, 06:14 PM
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duude that bad a$$ cant wait to see this
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Old 11-10-2010, 06:41 PM
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Originally Posted by mwdouglas View Post
sounds like a winner to me lol now the mud racing is it like a u shaped course with mud/water on it im trying to picture what exactly it is
Here's a link to one of her runs. 150ft in 5.3 seconds, alot of fun. We call it a speed pit, 10-15 in of mud


http://s311.photobucket.com/albums/k...Picture421.mp4


This is a deep pit. 150 ft in 14 seconds in 20-36in of mud, it was raining all day and deep.


http://s311.photobucket.com/albums/k...t=House052.flv
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Old 11-10-2010, 09:49 PM
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that second vid looks kinda like the place i wheel here local except add trees on both sides of the lane and make it 1/3 of a mile then have it open into a big pool of mud water about 24" deep in the shallow and around 36" or so in the deep
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