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Post by racemotives on Aug 14, 2014 19:32:10 GMT -5
When I have been looking around the boards, it makes me realize I don't know enough about my 1988 justy. I believe it's the RS trim. Ooo. I want to have the motor rebuilt, and was discussing a turbo with my mechanic. Then I got on here and realized upping the power should probably be accompanied by other mods like brakes and suspension. I also was thinking what good is 100-130hp if you red line at 90 on a flat surface. What are everyone's opinions when it comes to engine power? Is the rebuild worth it if I want to keep the 4x4? And turbo? Or should I look at other motors as donors?
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Post by Armageddous on Aug 15, 2014 12:37:03 GMT -5
These cars do well woith a turbo. You need to build the engine to handle it. That is, upgrade the oiling system as they suffer oil pressure issues. Yes your top speed is always limited by the gearing and there is no practical way around it. They are not highway cars.
Brakes can be upgraded on your 1988 by switching over to the second generation front brakes which are larger, and bolt right on to your hubs/knuckles.
Speaking of hubs, the first generation hubs/axles are smaller than the second generation and tend to strip when abused. If you get donor brake parts, take the knuckles/hubs/axles/calipers/pads/rotors and give your car a real upgrade.
Suspension.. Unsure. There is not anything in the aftermarket. The first generation cars do not have a rear swaybar, so you could add one of those. Anything else would have to be custom.
Engine swaps are a nice though but given the unique 4wd setup and limited engine bay it's not often they ever happen. Tho lots of people like to talk about it.
Be informed and have reasonable expectations. If you want to change the engine for huge power, remove the 4wd and Frankenstein the suspension, why start with a Justy at all?
Terry
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Post by sp0ngebob on Aug 15, 2014 16:14:06 GMT -5
blunt honesty....
while 130hp and building this motor would be fun (like most other builds) its going to be a huge pain in the ass.
you will need dished pistons, likely different connecting rods and a full rebuild. also you will need to address fuel delivery. as a carbed car it will be more difficult. injected cars handle forced induction far better from experience.
frankly it sounds like you would be cutting a check rather than swinging a wrench. id let the turbo idea go. if you do anything a simple rebuild with fresh pistons (cars just run better with new pistons) and maybe a slight bore job (20 over max) and maybe id consider milling the head like 10 thou to get a little higher compression ratio.
while the head was off, id take a shot at porting the head a little but just for fun. if you are paying for someone to do it, forget it. the returns for the cost just arent there.
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Post by racemotives on Aug 17, 2014 1:40:10 GMT -5
Agreed...why start with a justy. But it is a very unique car and is fun to drive. Mine is in pretty good shape for the year. I am a little concerned that the build with turbo will run upwards or 3000$. I was quoted 1400$ for a full motor rebuild. I think larger wheels and tires will aid the lack of top speed. Any suggestions on what would be worth the money to actually go through with? I'm thinking a turbo with around 9-12 psi. Larger wheels and tires, lifting it an inch, 1 inch wheel spacers all around. Exhaust redone, possibly headers. I know low end will be poor but the car doesn't do well below 3200rpm anyways. I figure with the rpm range, it could be a fun car to drive at 4500-6000 rpm. Also I'm considering options for making the car more solid. It's flimsy and sways fairly easy, where would I begin? Any suggestions on getting torque and HP up there? Is there turbo alternatives? Could I just raise the compression to a point where it would raise power? After market is non existent and I don't have options for cam, valves, crank...ect. so not sure ...
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Post by madmatt on Aug 17, 2014 16:05:19 GMT -5
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Post by sp0ngebob on Aug 18, 2014 9:26:05 GMT -5
Agreed...why start with a justy. But it is a very unique car and is fun to drive. Mine is in pretty good shape for the year. I am a little concerned that the build with turbo will run upwards or 3000$. I was quoted 1400$ for a full motor rebuild. I think larger wheels and tires will aid the lack of top speed. Any suggestions on what would be worth the money to actually go through with? I'm thinking a turbo with around 9-12 psi. Larger wheels and tires, lifting it an inch, 1 inch wheel spacers all around. Exhaust redone, possibly headers. I know low end will be poor but the car doesn't do well below 3200rpm anyways. I figure with the rpm range, it could be a fun car to drive at 4500-6000 rpm. Also I'm considering options for making the car more solid. It's flimsy and sways fairly easy, where would I begin? Any suggestions on getting torque and HP up there? Is there turbo alternatives? Could I just raise the compression to a point where it would raise power? After market is non existent and I don't have options for cam, valves, crank...ect. so not sure ... 9-12psi at the manifold is a shitload of boost per hole. that will require forged pistons at least and 99% sure, forged rods as well. i think you might need to read a little more about how turbos work if you are thinking about "headers" with a turbocharger...turbo cars dont have headers they have manifolds (i know, kinda synonymous but different here) and downpipes. a 1 inch wheel spacer is the worst idea if you plan on running a larger tire. a slightly oversized tire (i run a 175) will almost touch the bodywork. moving the tires out one inch will make contact before you hit lock.
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