I installed new (used) koni sport struts with rsr race springs, but the rear end sits extremely high compared to the front. front:3/4" fender gap, rear:2" fender gap. I know used struts is not ideal, but its a good intermediate to run on for 1 season until i get coilovers.

I tried to post in the suspension section, but got no replies not to mention very low count of views. I shoud have originally posted in the 2nd gen since its much livelier. None the less, there is a lot more information in that thread so I do not want to repost the exact same thing unless necessary. The link to my original post with pics is below.

https://www.rx7club.com/suspension-wheels-tires-brakes-20/rear-end-reallly-high-koni-strut-rsr-springs-687755/

An addendum to the linked post:
I called koni yesterday morning and got dimensions of roughly 252mm (roughly 9.92") from the center of the lower bolt hole to the spring perch (where the spring actually sits... not the lip.). Aside from that the koni rep had no extra info for me except the number 1399 stamped on the strut (see linked post) reveals the strut was created the 13th week of 1999. I also asked if there had been any changes to the strut since then, he said he saw no revisions that pertained to the height. I will call again and ask for a copy of this drawing, but i doubt they will give that out.

At this point I am looking for anything, suggestions comments criticisms. Hell even a "you are stupid because X" would be well received.

Thanks,

Bolaji

 

Same **** I have with my BRAND NEW TEIN springs and KYB shocks. Not immitations, the real deal.

And my rear end sits 1.25 inch higher.

I'm interested in seeing options for this as well.

 

That's odd, My car is slammed in the rear with the RS*R race springs...

 

F.C.3S: Im very surprised this is actually happened to someone else with an entirely different setup. If your struts are in a position to get measured i would like to know the height of the perch from the center of the lower mounting bolt of your rear struts.

MaczPayne: The person i bought the springs from put them on his car briefly and also said his **** was slammed too... which leads me to believe its the struts... but I cant say for sure yet.

 

I have to take the wheel off to measure that.

 

did you drive it around yet? maybe it needs to settle? i don't know..

 

NO i didnt drive it more than 5 miles. I currently dont have an exhaust, and i usuallly see 1 or 2 cops anytime i drive anywhere. Therefore: "arrest me red" rx-7+no exhaust+my black ***+no inspection sticker= me gettin screwed.

But i gotta say, if the rear settles even 1", shouldn't the front do roughly the same? besides i could not see any new shock settling more than 0.25". Of course I really really really hope i am wrong on both counts.

F.C.3S: its all good, just never hurts to ask.

 

thats weird, the short distance you drove should have been enough to make it settle down, thats rather odd, good luck.

 

are the springs seated correctly if u did not place the coil in the rubber seat correctly it could effect the amount of drop

if not make sure the springs are in right side up(not sure if there is one with those springs but there is with mine)

 

yep double checked the spring seating/strut-spring assembly with the fsm. Double checked that the spring is properly seated. The springs have the rsr logo situated up. Check the pics.

But for piece of mind i will pull the shocks off again and dis-assemble them to make sure everything is as it should be

 

i know sell those springs to me that will solve your problem!! lol jk (though i wish you would)

 

That's funny, it looks higher than my stock TII springs that I'm using! If you come down to nyc, we may be able to help you out.

 

I took everything apart again.... this time i took lost of pictures, but my card reader is at work so i will have to post them later.

I re-measured the strut and the dimensions actually do match the dimensions from koni. I just wish i could call an rsr rep and find out some more info on the springs, which they happen not to make anymore.

The springs have a length of about 13". To me that seems long.

on a good note i found out the springs can be removed from the strut without a compressor, which made this a 20 min job instead of a 40 min job.

 

try searching..for some reason i think someone had the same problem awhile back.

I will look and see if i can find it. try posting up on teamfc3s

 

You do any weight reduction to the car? You might not have enough weight in the rear.

The springs are designed for a stock, unmolested interior equipped car.

Any weight reduction will affect the springs. Thats why most people that do it go with coilovers.

 

I tried searching everywhere, and found nothing similar at all. After i found nothing at all i finally decided to post. I hope/wish i missed some other good info on here, but i doubt it.

Here are some pics from yesterday. I measured the spring, perch again, and tried my best to take a step by step assembly of the bushing/mount side.

I also got my hands on my old stock strut/spring.
stock spring measures roughly 16" slightly shorter sitting vertically.
Stock strut measures roughly 10" from center of bolt hole to the perch.

The way everything is looking the rsr should be pretty much perfect and the rear sitting low. Might there be something with my control link (rear camber adjustor)? Since I have not gotten an alignment yet it is sitting right at the stock height (made it the same size as stock before installing.

I will take some time this weekend to try it out. It seems like a long shot, but worth a try.

 

Here are the rest of the pics. The spring pics turned out a little funky due to the angle/depth of them.

 

Your old springs are probably sagging, plus lower spring rates mean they will compress more when the weight of the car is on them.

 

RSR is progressive?

 

RS*R race springs are linear.

 

That's what I thought, but I see the coils tightening up by the base in one of the photos.

 

That's what the FC's front springs are supposed to look like...

 

No, not winding down in a cone, seeing the space between each coil suddenly get smaller.

Those look like rear springs anyway.

 

Well if it helps any, I went out and measured my stock rear shocks, and from the spring perch to the center of the lower mounting bolt is 9.5"

 

There was no weight reduction yet. Theres about 3/4ths a tank of gas, along with the rear filled with the old automatic seatbelts (swapped for Canadian manual).
Pretty much all the loose trim from the interior is in the back. So I did not personally do any weight redux. Aside from the missing bin covers I did not remove anything nor did i notice anything substantial.

those are definitely rear springs. The front are the same shape as stock. I thought they seemed progressive too, but the coil spacing on the progressive ones are much more drastic.

For the old springs, sagging is an understatement, those things are just downright weak now. Especially after 200k miles.