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Unread 09-05-2012, 04:05 PM   #1
BioTex
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Join Date: May 2008
Location: Alpine, Tx.
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YJ Buggy with stroker build

I was looking at all the spare parts in and around my shop, and have decided to attemp my first buggy build. I have 67 Scout 80 frame and a 90 YJ frame to get rid of, so I opted for the YJ rolling chasis for my base. I don't have enough experience working with tube to attemp a full buggy chasis, so I'll keep this comparitively simple. At least in my mind!

I have an older 4.2L engine that has the 12 CW shaft, so I might as well build a stroker for it. I'm happy in the 225 HP range, but that might get expensive, so anything above 175hp and I'm happy.

I have a set of Dodge axle with 4.10's (unit bearing front). D60/D44 disk up front. I also have a set of Scout II D44 axles, but they would need re-geared and a complete rebuild. I'm leaning toward the D60/D44 combo.

Yesterday I purchased a Pro Bender, so no turning back now...

I dug up a complete TBI setup with the 727 computer and all the wires with sensors attached. I also found a complete hydroboost brake system. (I'm a pack rat). Anyways, on to the build plan.

I'm going to stretch the wheelbase to somewhere in the 98" range, but that is not set in stone. I have a YJ tub from the firewall forward. I think I will use it, but will have to go with a CJ grill and flat fenders. I have a 79 Ford T-18, but it is 2wd. Big bucks to adapt it, so the tranny/x-fer is still undecided. I'll have to see what comes around or is available on the cheap.

For now I am going to run the YJ springs SOA. I don't have the skills to do a 4-link. I could probably handle installing coils easy enough, but the idea is to get it going with the basics, then I can modify it over the years as I get better at fabricating.

Here is the YJ base. I am eagerly awaiting some ideas and comments as this is new to me.

90-yj.jpg   90-yj-2.jpg  
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'85 CJ7, BDS 4" lift, 1" Body lift, 33x12.5, Shrockworks Sliders, 304 V8 with RV cam., T-176, D300, Dana 30, AMC 20.
1986 CJ10-A SD-33 Diesel/727/np208
1971 800B with 345/T-19
06' TJ Rubicon, 4" R.C. springs, BFG/AT 35s M.C. 6" fenders, rockers and surrounds, Currie front & rear adj. tracbars, tattons DC rear shaft, adj. upper - lower CA's. Bilstein 5100's
YJ Buggy Build Current project. Stroker/FI ?
1990 MJ Comanche 4.0L AX15/np231
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Unread 09-05-2012, 04:07 PM   #2
BioTex
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Oh, forgot to add. I have a brand new set of 33's and 35's, so I can run either.
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'85 CJ7, BDS 4" lift, 1" Body lift, 33x12.5, Shrockworks Sliders, 304 V8 with RV cam., T-176, D300, Dana 30, AMC 20.
1986 CJ10-A SD-33 Diesel/727/np208
1971 800B with 345/T-19
06' TJ Rubicon, 4" R.C. springs, BFG/AT 35s M.C. 6" fenders, rockers and surrounds, Currie front & rear adj. tracbars, tattons DC rear shaft, adj. upper - lower CA's. Bilstein 5100's
YJ Buggy Build Current project. Stroker/FI ?
1990 MJ Comanche 4.0L AX15/np231
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Unread 09-09-2012, 01:40 PM   #3
BioTex
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Location: Alpine, Tx.
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I was able to get the engine cranked up, and so I'm thinking of fast tracking the build by using the 4.2L, and build up a stroker afterwards. The bender arrives tomorrow, so anxious to get started.

I found an offenhauser intake, but it is a dual plane design. Not too sure if it would be wise to use it with a tbi adapter or not. Anyone know how it works out?
__________________
'85 CJ7, BDS 4" lift, 1" Body lift, 33x12.5, Shrockworks Sliders, 304 V8 with RV cam., T-176, D300, Dana 30, AMC 20.
1986 CJ10-A SD-33 Diesel/727/np208
1971 800B with 345/T-19
06' TJ Rubicon, 4" R.C. springs, BFG/AT 35s M.C. 6" fenders, rockers and surrounds, Currie front & rear adj. tracbars, tattons DC rear shaft, adj. upper - lower CA's. Bilstein 5100's
YJ Buggy Build Current project. Stroker/FI ?
1990 MJ Comanche 4.0L AX15/np231
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Unread 09-09-2012, 02:46 PM   #4
HardworkWorks
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Cant wait to follow the build!
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Unread 09-09-2012, 06:02 PM   #5
BioTex
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Quote:
Originally Posted by HardworkWorks View Post
Cant wait to follow the build!
Thanks!

Here is what it looks like at the moment.
The headers cleaned up well, but one of the tubes took a beating when the HP D30 hit it on the YJ that I pulled them from. These parts will all get replaced at a later date, but will work so I can spend money on the cage right away. I'm basically using up parts I have lieing around.
offy-headers-1-.jpg   offy-headers-3-.jpg  
__________________
'85 CJ7, BDS 4" lift, 1" Body lift, 33x12.5, Shrockworks Sliders, 304 V8 with RV cam., T-176, D300, Dana 30, AMC 20.
1986 CJ10-A SD-33 Diesel/727/np208
1971 800B with 345/T-19
06' TJ Rubicon, 4" R.C. springs, BFG/AT 35s M.C. 6" fenders, rockers and surrounds, Currie front & rear adj. tracbars, tattons DC rear shaft, adj. upper - lower CA's. Bilstein 5100's
YJ Buggy Build Current project. Stroker/FI ?
1990 MJ Comanche 4.0L AX15/np231
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Unread 09-09-2012, 06:25 PM   #6
HardworkWorks
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Looks like it cleaned up real well! This is my engine going in my 84 cj7 with a t18
image-3231622272.jpg   image-997860272.jpg   image-2141634156.jpg  
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Unread 09-10-2012, 06:42 PM   #7
BioTex
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Nice!

What kind of HP you expecting?
__________________
'85 CJ7, BDS 4" lift, 1" Body lift, 33x12.5, Shrockworks Sliders, 304 V8 with RV cam., T-176, D300, Dana 30, AMC 20.
1986 CJ10-A SD-33 Diesel/727/np208
1971 800B with 345/T-19
06' TJ Rubicon, 4" R.C. springs, BFG/AT 35s M.C. 6" fenders, rockers and surrounds, Currie front & rear adj. tracbars, tattons DC rear shaft, adj. upper - lower CA's. Bilstein 5100's
YJ Buggy Build Current project. Stroker/FI ?
1990 MJ Comanche 4.0L AX15/np231
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Unread 09-10-2012, 06:47 PM   #8
HardworkWorks
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Quote:
Originally Posted by BioTex
Nice!

What kind of HP you expecting?
About 375 to the wheels. Defiantly invested in one piece axles! Check out my build thread!
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Unread 09-10-2012, 07:10 PM   #9
BioTex
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Didn't get much done today. Went out with the intentions of cleaning up the frame. Like cutting off the body mounts, removing the track bars and their mounts etc...

I sat there trying to come up with a plan, and ended up not getting anything accomplished. I'm stuck on deciding if I should use the YJ firewall, or build it from scratch. The YJ firewall is too wide, and narrowing it is about as much work as building it from scratch, so going to have to bite the bullet. I'm thinking around 55" wide should be about right.

It seems most build or buy the chassis and don't use the stock frame rails. Like the Hendrix x-chassis. I guess it is lighter that way, but since I'm not at that level yet, I'm going to proceed with just putting a "cage" on top of my frame.
Any tips on where to begin?
__________________
'85 CJ7, BDS 4" lift, 1" Body lift, 33x12.5, Shrockworks Sliders, 304 V8 with RV cam., T-176, D300, Dana 30, AMC 20.
1986 CJ10-A SD-33 Diesel/727/np208
1971 800B with 345/T-19
06' TJ Rubicon, 4" R.C. springs, BFG/AT 35s M.C. 6" fenders, rockers and surrounds, Currie front & rear adj. tracbars, tattons DC rear shaft, adj. upper - lower CA's. Bilstein 5100's
YJ Buggy Build Current project. Stroker/FI ?
1990 MJ Comanche 4.0L AX15/np231
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Unread 09-19-2012, 04:41 AM   #10
BioTex
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Shouldn't be too much longer! My tubing is in, the Pro-Bender 4 is in, the JD2 notcher is shipped. Plan is to start cutting off tabs and brackets from the YJ frame this weekend. I already pulled off the trackbars and shocks.

I'm shopping for a Ford rear 8.8. If I can find one on the cheap, I'll go that route. Else I'll use the D60 I already have. I've been studying chasis designs, and have settled on a two seater. I will be stretching the W.B. by about 10". I am certain that I will try for a LCOG build. Going to keep things as light as I can without compromising safety.
__________________
'85 CJ7, BDS 4" lift, 1" Body lift, 33x12.5, Shrockworks Sliders, 304 V8 with RV cam., T-176, D300, Dana 30, AMC 20.
1986 CJ10-A SD-33 Diesel/727/np208
1971 800B with 345/T-19
06' TJ Rubicon, 4" R.C. springs, BFG/AT 35s M.C. 6" fenders, rockers and surrounds, Currie front & rear adj. tracbars, tattons DC rear shaft, adj. upper - lower CA's. Bilstein 5100's
YJ Buggy Build Current project. Stroker/FI ?
1990 MJ Comanche 4.0L AX15/np231
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Unread 09-23-2012, 04:50 PM   #11
BioTex
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Managed to get the drive train pulled. Also cut off the body mount tabs. Removed the shocks, track bar and sway bar. I removed the tranny skid so I could use it for a template to cut out a flat one.
M.O.R.E. 1" MML on the way

Next up I will be stretching the wheelbase at the rear by about 7".
frame-prepped.jpg   prep-work-3-.jpg  
__________________
'85 CJ7, BDS 4" lift, 1" Body lift, 33x12.5, Shrockworks Sliders, 304 V8 with RV cam., T-176, D300, Dana 30, AMC 20.
1986 CJ10-A SD-33 Diesel/727/np208
1971 800B with 345/T-19
06' TJ Rubicon, 4" R.C. springs, BFG/AT 35s M.C. 6" fenders, rockers and surrounds, Currie front & rear adj. tracbars, tattons DC rear shaft, adj. upper - lower CA's. Bilstein 5100's
YJ Buggy Build Current project. Stroker/FI ?
1990 MJ Comanche 4.0L AX15/np231
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Unread 09-24-2012, 05:18 PM   #12
BioTex
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Today I pulled the rear axle out, and ground off the brackets. I ordered new shock mount brackets for the axle as well as some misc. harware like the spring hangars for the stretch.

I almost bought a flat skid plate 1/4" thick from Barnes 4WD, but decided to wait. I'm thinking I want a modular design so I can add a pan skid to it also. The only place here to purchase 1/4" plate is $120 for a 4'x4' piece. I could probably get that price down some if I wait until I go into a larger town. IDK, maybe that is a good price.

Wish I could afford aluminum. I'd like to keep the weight down so the axles will last more than a week...
__________________
'85 CJ7, BDS 4" lift, 1" Body lift, 33x12.5, Shrockworks Sliders, 304 V8 with RV cam., T-176, D300, Dana 30, AMC 20.
1986 CJ10-A SD-33 Diesel/727/np208
1971 800B with 345/T-19
06' TJ Rubicon, 4" R.C. springs, BFG/AT 35s M.C. 6" fenders, rockers and surrounds, Currie front & rear adj. tracbars, tattons DC rear shaft, adj. upper - lower CA's. Bilstein 5100's
YJ Buggy Build Current project. Stroker/FI ?
1990 MJ Comanche 4.0L AX15/np231
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Unread 09-25-2012, 07:40 PM   #13
BioTex
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I had this build moved over to the tech section because i'm about to veture into some unchartered territory. I'll be needing your help.

Today my JD2 tube notcher arrived, and I assembled the bender. I called around, and found a Ford 8.8 rear axle for $250. I'll grab it in the coming week. I was worried about the D35, so now I can run 35's if I want.

I'm tracking down the parts to build the stroker, but the engine build will be much later. I want to get the cge built and the suspension working before I start on the stroker. I like to save the fun stuff for last...
__________________
'85 CJ7, BDS 4" lift, 1" Body lift, 33x12.5, Shrockworks Sliders, 304 V8 with RV cam., T-176, D300, Dana 30, AMC 20.
1986 CJ10-A SD-33 Diesel/727/np208
1971 800B with 345/T-19
06' TJ Rubicon, 4" R.C. springs, BFG/AT 35s M.C. 6" fenders, rockers and surrounds, Currie front & rear adj. tracbars, tattons DC rear shaft, adj. upper - lower CA's. Bilstein 5100's
YJ Buggy Build Current project. Stroker/FI ?
1990 MJ Comanche 4.0L AX15/np231
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Unread 09-26-2012, 10:36 AM   #14
youngjeeper11
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I will be following this one.
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Jeep 1:Used to have a 93 YJ 2.5l- 3.5" Black Diamond, Chevy TBI 5.7l V8, SM 465 4 speed, 8.8 rear( 4.10, L/S), rhinoline, Mile Marker 9000, NP 231, Had to sell it due to college
Jeep 2: 89/91 YJ, 4BT Cummins, NV4500, NP 231, Old Man Emu 2.5" suspension lift, 1" body lift.....Runs and drives, but very much a project
Interned at Novak Conversions 2 summers ago

Ask me about my 4BT Cummins Motor Mounts!!
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Unread 09-26-2012, 03:49 PM   #15
Jagged
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Subscribed. Very interested in this build.
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