so i've been looking for some 600 lb/in 7"x2.5" eibach/GC springs to use on my race crx. i cant really find anything here or on ebay. but i did find a set on ebay but in a 6" spring.

so does this difference in length affect anything? or could i just move the perches up 1" to account for the difference in height and it would be effectively the same as running a 7" spring like i used to have?

i have 7" 500 lb front and used to have 400 lb 7" rear, but want to up the rear rates. so will ride height and everything be the same with perches moved up? or is there some variable im missing? suspension travel shouldnt be an issue, or will it?

thanks

 

Good question I had the same question and I was told it should not matter as long as your shocks are tuned to the proper length. But I would like to hear others knowledge.

 

Very good question... i run a 7 inch spring up front and a 8 inch in the rear..
I cant tell any difference.
Not by choice mind you, and I was told the height of the spring (one inch) wouldn't make any difference at all.

 

too short and it will coil bind, too long and your ride height will be too high.
after that, it really doesn't matter (although I'm sure Scott can prove me wrong)

 

I run 6 inch springs on my ita crx. No binding. The circlip on the shocks allow you to change spring lengths. I am using koni race shocks.

 

speaking of koni shocks... ive also been toying the idea of going with them too (8041's).

can you use the standard GC coilover kit with th Konis? or do you have to get "special" sleeves?

so you guys think ill be ok with the 6" spring in rear and just bump the perch up an inch?

 

This question comes up a few times every year. There are two ways to go about it. One is to ask other people if it has worked out ok in their case. The other is to calculate the required length for yourself.

https://honda-tech.com/forums/suspension-brakes-54/worried-about-coil-bind-2062714/

 

I think its time to start searching the threads again.. the answer is out there.

 

On honda's you can use 6, 7, or 8 inch springs in the rear, as you wont run out of travel (spring coil travel)

On the front my "rule of thumb" is this

650lbs or lower 7 inch springs.

700lbs or higher 6inch springs.

other then avoiding coil bind, and being able to get low enough (like spenc) mentioned spring length doesn't mean anything.

 

great

ill have to take a look at my GC sleeves now to see if they will work with Koni shocks.
i didnt know they had a slight machined lip. my GC kit is quite old, as they have been on this car since before i bought it like 6+ years ago. not sure when GC made the switch to allow koni fitment. and consequently i never looked.

 

buy an adapter for the sleeves, then

 

i dont think its as easy as getting an adapter. if these sleeves arent made for the konis, id have to get new sleeves. the konis only have a small circlip/snap ring for the sleeves to rest on.

 

The adapter sits on the Koni circlip and the sleeves sit on the adapter.

 

no, with GC, the sleeve sits on the circlip directly. you take the perch adapter off.

see:

 

yes, but you don't have Koni specific sleeves.
The adapter I am talking about is not the same as the perch designed for running the OEM springs.

 

well thats what im saying. i have to find out. ill have to pull the sleeves off the shocks and look at them.

i was under the impression that once GC started making the koni compatible sleeves, all the sleeves were like that from then on. unless thats wrong. i havent been able to find much info differentiating them though.

 

Very easy to tell. The Koni specific sleeves have an ID that matches the OD of the Koni shocks. (I forget the number, but it's something like 1.6 inches. The non-Koni general purpose sleeves have a larger inner diameter, something like 2". Second, the Koni sleeves have an extra counterbore on the ID that lets the the sleeve surround the circlip, and not sit simply sit on top. See the first pic you posted.

For more info, go to the suspension forum, where Patrick will be happy to help you out.

 

Lol I know dude. That's why I posted that pic. I just need to actually look at mine to see what they are.

 

yup, checked mine. def not the koni ones. called up GC and ordered them since no one would sell them without springs.

 

Longer springs are heavier than shorter springs for the same rate, and add to unsprung weight. You want to use the shortest ones possible that will do the job.

For example, in 2.25" diameter and 700 lb/in rate, an Eibach ERS 6" long spring weighs 2.32 lbs while an 8" long spring weighs 3.57 lbs and a 9" 4.3 lbs or about double the weight of the 6" spring even though it is only 50% longer.

So shorter is better.

 

good point des.

i went with a pair of some 6"x2.5" 600 lb springs that i found on ebay. won the auction at 26 bucks haha.

 

2.5x6x550 front, 2.5x6x800 rear on my CRX, running 5.25 ride height at the bottom of the rocker. About to go stiffer on the springs. But as of now, no binding.