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Old 08-15-2015, 04:09 PM
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Looking at a 1990 YJ with significant mods

I am looking for a used Wrangler and found a 1990 Sahara with the following mods. Owner is claiming close to 200 hp with these mods. The body is in perfect condition...looks new. Extremely clean. What do you think of this configuration? I am totally new to off roading. Drove a new Wrangler and I was underwhelmed. Steering was mushy and lots of play and totally underpowered. I will be able to talk to the mechanic who has done all this work and known this car for 20+ years.
This 1990 YJ has:
70000 miles on a Verle Stevens machined 4.2 block. 4.0 head with headers. Hesco/Mopar OBD1 fuel injection conversion. Comp cam specially ground for this configuration. Original fuel injection external fuel pump replaced with OE fuel tank and in tank lift pump. 4:10 gears with Detroit lockers front and rear. Front original knuckles replaced with later model knuckles to facilitate larger hub for manual locking hubs. The rear drums have outset spacers by Performance Wheel changing the bolt pattern to match the front hubs. The combination of 10X31 50R 15LT tires, the shackles and springs make the lift approximately 6?.The winch is WARN 9000, the tires are nearly new and the top is new.AC works and is converted to R134. Tires are nearly new Firestone Destinations and the top is new.

Thanks for your input.

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Old 08-15-2015, 05:38 PM   #2
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Quote:
Originally Posted by DonnaS View Post
I am looking for a used Wrangler and found a 1990 Sahara with the following mods. Owner is claiming close to 200 hp with these mods. The body is in perfect condition...looks new. Extremely clean. What do you think of this configuration? I am totally new to off roading. Drove a new Wrangler and I was underwhelmed. Steering was mushy and lots of play and totally underpowered. I will be able to talk to the mechanic who has done all this work and known this car for 20+ years. This 1990 YJ has: 70000 miles on a Verle Stevens machined 4.2 block. 4.0 head with headers. Hesco/Mopar OBD1 fuel injection conversion. Comp cam specially ground for this configuration. Original fuel injection external fuel pump replaced with OE fuel tank and in tank lift pump. 4:10 gears with Detroit lockers front and rear. Front original knuckles replaced with later model knuckles to facilitate larger hub for manual locking hubs. The rear drums have outset spacers by Performance Wheel changing the bolt pattern to match the front hubs. The combination of 10X31 50R 15LT tires, the shackles and springs make the lift approximately 6?.The winch is WARN 9000, the tires are nearly new and the top is new.AC works and is converted to R134. Tires are nearly new Firestone Destinations and the top is new. Thanks for your input.
A 4.0 head on a 4.2 block is supposed to give 50hp now with a camshaft and full exhaust and fuel injection I could see 200 being a reasonable claim. 4.10 gears and Detroit lockers so it's geared for tires upto 33" tall but you may want to see if it has the d35 rear still cause d35 and lockers = failure

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Old 08-16-2015, 01:08 PM   #3
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I know nothing about any of the mods you have listed, but my advice is to make sure it is suitable for the job you want it to do. Do you want to drive it on the highway? If so, make sure it will pass emissions if it's required in your area. I've heard that lockers can be tricky on the highway, so make sure you know how to drive with them. If you buy the jeep, join a club so you can learn how to drive safely off-road, there's more to it than you might think. Good luck and welcome to the addiction!
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Old 08-16-2015, 02:57 PM   #4
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I agree with both the statements from Tom and Cyndi.

I can see 200+ HP from that set up. The Dana 35 stock rear (if it still has it) is prone for failure specially with a locker involved and a novice behind the wheel.

And is it what you want? You will have to be very mechanically inclined to own something that old that has those mods. Or have deep pockets to take it to the mechanic often. Even doing so, it will have to be a very knowledgeable mechanic to know how to troubleshoot a Hesco injection system that has been altered. Meaning you just can't go to Napa and get parts for it.
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Old 08-16-2015, 05:49 PM   #5
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When I was in the market to buy a wrangler I looked at all kinds engine mods and different height lifts but in the end I purchased and all stock jeep . There is nothing wrong with a jeep like that if that's what your looking for , I just decided if I was going to mod the engine or lift it I wanted to do it myself .personal preference I guess . Good luck whatever you decided
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