Suspension Questions
 

Hey Guys,

I am not super familiar with all the suspension terms, so hopefully I can explain myself well enough.

I currently am running the JIC FLT-TAR on my car (front coilovers with rear shocks/springs). A few people have told me that I should be looking to convert my rear shocks to coilovers as it would equate to better performance? Is there any truth to this?

The only way I could see doing this is to get a sleeve kit? I can't seem to find much info about them, is this the way to go if I choose to do this? Can someone recommend a brand? Do I get a spring with the same rate? So many questions lol.

Any help would be mighty appreciated.

After looking at some pictures, it almost looks like i could just add an upper and lower locking ring with a spring?

would you mind posting pictures? seems like the kit you have is fine, if you are unsatisfied with it you may need a whole new set of coilovers

So after a few e-mails with JIC, I found out that the above would be sufficent for the conversion, but...

They said the reason they did not go with a true coilover in the rear is they found the area of the 370 where the strut attaches in the rear to be rather week. They feel that there may be a chance that the increase in pressure with the spring in the rear may cause the assembly to break through. I know other manufactures have this option so I am wondering if JIC has over analysed or if the other manufatures have under analysed?

I wondered about that... Since just about every other manufacturer makes a true-type coilover for the rear and no one has ever reported break through or even damage to the rear shock mounts; I have to think the concern is unfounded.

I've been running a true type setup for two years now. No issues.

I also found this interesting, would love to hear some quantitative proof. Perhaps the worst case scenario will only happen in an extreme blow, which won't be a common occurrence for us.

Interesting fact: Someone from Robi Spec (I assume it was the shop owner) said the same thing that JIC said. But then on the other hand, JRZ makes true type for the Z. Both are highly regarded and not cheap

So hypotetical situation, you blew out that section. What would be involved with fixing it? I would think the only thing to do would be cut and weld, but that would not be as strong? Just trying to see what the worst case scenario would be to help me decide if this is the route i still want to go.

Hypotetically, if you blow that out, you should probably think about getting a rally car instead. In all seriousness, I wouldn't worry about it. In fact, your setup is likely more than you need. Is this mostly for street use or track?

Others, correct me if I'm mistaken but I thought the Nismo RC had a true coilover setup spec'd out with some packages. I don't recall if that area would have been reinforced however.

how did you convert to true coilover?

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you just buy a true coilover for the set and have it installed, there isn't any special 'conversion' involved. i've been running them also for a while now, no issues.

Not worth it. You gain absolutely nothing unless you also replace the control arms with adjustable links, all this is additional costs. If you need this extra level of toe/camber adjustment then you will benefit from these changes. The only "issue" with the remote spring is a higher motion ratio. Within itself this is nowhere near as big as a problem as having to reinforce the strut tower or running the risk of it failing. To be fair the risk of it failing is pretty low unless you some how bottom out the strut and send the maximum force into the tower. If you stay off the bumpstops it theoretical should survive. But another problem is increased chassis flex. The sensation is slightly less pronounced if you are running a stiffer than necessary spring.

Overall the remote spring setup is more ideal as Nissan intended unless you reinforce the strut towers. More tire space, safer and cost less.

Jon at JIC knows what he is talking about. He has several fully built race cars and several street cars.

Anddddd... This is a old post...... ��