Why YJ SPRINGS?
-
Hello Guest, we are proud to now have our Wiki online that is completely compiled and written by our members. Feel free to browse our Jeep-CJ Wiki or click on any orange keyword when looking at posts in the forum.
Why YJ SPRINGS?
- Thread starter Az84cj7
- Start date Start date:
- Last post Last post:
Sasquach
Crazy Sr. Respected Jeeper
- Posts
- 4,054
- Media
- 35
- Thanks
- 2
- Location
- Santa Ynez, Ca.
- Vehicle(s)
- 1978 CJ5, 258 w/4.0head, Mopar MPI, P.S., P.B.,Tilt wheel, No stereo, t-18, t-20, amc 20, dana-30 w/tru-trac, Warn full float w/locking hubs & Detroit locker in the AMC.
1964 CJ3B, 4-134
1952 M100 trailer
WhyJ? Well I'm gona make a guess and will see how I do...Besides the fact that they are wider and reported to flex better etc. They are flatter and when over axle you aren't lifting the CJ to the moon like you would be with the more arched CJ spring.
Just a guess.
Just a guess.
CJim7
Crazy Sr. Respected Jeeper
- Posts
- 3,590
- Media
- 1
- Thanks
- 4
- Location
- Twin Falls ID
- Vehicle(s)
- '84 CJ7 - 430hp 401 on propane - T18a/D300 twinsticked, Superior axles, Lockers, full boatsides, Warn 8274, OBA, 36" TSL's.
Good guess
Old Dog
Always Off-Roading Jeeper
- Posts
- 13,880
- Media
- 82
- Thanks
- 5
- Location
- Stonelick Lake, Ohio
- Vehicle(s)
- 83 CJ7 350 tbi, TH350, D300 twin sticked & clocked, narrowed Chief D44 Eaton Elocker & Moser shafts, Explorer 8.8 Detroit locker, 410's, RE 4.5" spring lift 1" body lift, 35" Claws, cage tied to frame, Corbeau baja seats, HD tie rod and draglink, u-bolts flipped, custom skid plate and sliders, Warn 9.5ti winch with Amsteel synthetic line
AussieCJ7
Active Jeeper
- Posts
- 251
- Thanks
- 0
- Location
- Australia
- Vehicle(s)
- 1983 CJ7 Australian delivered RHD wide track, orginally GM iron duke 4cyl, T5, Dana 300. For now see mods :)
This section from the jeep performance handbook is the simplest i have seen the others all go in huge calculations of friction and surface area etc
Jeep 4x4 Performance Handbook - Jim Allen - Google Books
Nett answers is for the same spring rate and leaf thickness you need more leaves for a narrower spring than a wide one
Length is also another factor not so much for the CJ vs YJ springs but when you start adding in Cherokee spring leaf's
Jeep 4x4 Performance Handbook - Jim Allen - Google Books
Nett answers is for the same spring rate and leaf thickness you need more leaves for a narrower spring than a wide one
Length is also another factor not so much for the CJ vs YJ springs but when you start adding in Cherokee spring leaf's
CJim7
Crazy Sr. Respected Jeeper
- Posts
- 3,590
- Media
- 1
- Thanks
- 4
- Location
- Twin Falls ID
- Vehicle(s)
- '84 CJ7 - 430hp 401 on propane - T18a/D300 twinsticked, Superior axles, Lockers, full boatsides, Warn 8274, OBA, 36" TSL's.
Sprung over, you will probably net 3½-4 inches.
Old Dog
Always Off-Roading Jeeper
- Posts
- 13,880
- Media
- 82
- Thanks
- 5
- Location
- Stonelick Lake, Ohio
- Vehicle(s)
- 83 CJ7 350 tbi, TH350, D300 twin sticked & clocked, narrowed Chief D44 Eaton Elocker & Moser shafts, Explorer 8.8 Detroit locker, 410's, RE 4.5" spring lift 1" body lift, 35" Claws, cage tied to frame, Corbeau baja seats, HD tie rod and draglink, u-bolts flipped, custom skid plate and sliders, Warn 9.5ti winch with Amsteel synthetic line
You get the dia. of the axle plus the thickness of the spring pack for sure.
There may also be a difference in how much more or less arch is built into
the spring pack.
As jim said, you usually get 4" give or take an inch.
With 35's you will need to trim some wheelwell's so they don't rub.