71ka510 Posted September 25, 2009 Report Share Posted September 25, 2009 So, i have been talking to Don Feen over at ground-control. I do not have the funds for thier rear coil overs at the moment.. so i asked if he could suggest a rear spring according to my cars current set up... So, here is my set up.... 4-door 510 ka24e swap 280zx front struts, on 15" wheels.... lowered low enough that i am tucking a lil bit of tire 350# spring ( yup stiff!! ) on the rear, slotted crossmember,lsd, 15" wheels.... kyb gr2 struts.... cut stock springs at the moment.( cut down to 8.25" i think ).... almost tucking rim ..... So i asked him if they had a spring that would work well on the back , in the stock location..... I was told before the ratio for the rear is something like 3.81:1 ? So, i should be looking for 1333# springs? Well he replied and suggested a 450# spring from betts..... is that way too soft to match my fronts? It sounded crazy to me..... I would rather go with 532# d50/mighty max springs from belltech then, if they would compliment my fornts Sorry for rambling Chime in if you like Quote Link to comment
ichorid Posted September 25, 2009 Report Share Posted September 25, 2009 the D50 would be the way to go, I know I was choking on the thought of ~700 bucks for rear coilovers. 1 part ~700 bucks! EEESH thank you rad dude of the year at eagle rock swap for the coil overs! I really shoulda got his name. Quote Link to comment
71ka510 Posted September 25, 2009 Author Report Share Posted September 25, 2009 so a 532# wouldnt be too soft for such a stiff front? o the d50 spring fomr belltech is 8" tall with 7 free coils..... Don said the betts are a lil tall for a 4-door, so i can cut to make stiffer... but i didnt think the spring made a difference on a 2 or 4 door Quote Link to comment
DISLEXICDIME Posted September 25, 2009 Report Share Posted September 25, 2009 http://www.the510realm.com/viewtopic.php?f=29&t=1067 Quote Link to comment
71ka510 Posted September 25, 2009 Author Report Share Posted September 25, 2009 (edited) been there a zillion times...... and rarely do i find anyone posting thier rear spring rate... they say oh i have lowered springs.... or i have suspension techniques.... or king....... couldnt find anything there that helped me...... or just no diffinitive answers.... i cant find anyone that sells a spring with a higher rate than 800# for a 3" i.d. spring :( Edited September 25, 2009 by 71ka510 Quote Link to comment
thisismatt Posted September 25, 2009 Report Share Posted September 25, 2009 been there a zillion times...... and rarely do i find anyone posting thier rear spring rate... they say oh i have lowered springs.... or i have suspension techniques.... or king....... couldnt find anything there that helped me...... or just no diffinitive answers.... i cant find anyone that sells a spring with a higher rate than 800# for a 3" i.d. spring :( I run a 600 pounder in the rear (stock location) and a 350 up front with R compound tires in a race use only car. i would cut that by 100 rear and 75 front for strret tire use. From what I've seen of cars with 700lb rears, they are too soft. Just a comment on the rears, 9oo Is a good point to start. 700 is definately too soft. Do NOT be afraid to sneek up on 1000. That sounds really stiff to some, but, look where the whell is relative to the spring. Lots of leverage happening. The benefit also is the stiffer the rear, the less tendancy for toe change, which you REALLY feel on a 510. Rear spring: 820LB Rear:Specialty Engineering 1100# spring The 275 to 300# up front with 1000-1200# our back is what we use up here if sticky tires are involved, seems to work good for quite a few of our club members like myself, Keith, Malcolm and.......for both solo II, solo I, hillclimbs, and track days. After increasing the front roll stiffnes by the #300 springs, and 1 1/8" front bar, and 1,200 rear springs (no rear bar) the weight transfer to the front was dramatically reduced, with the car taking a very good set in corner entry, and the throttle was able to be APPLIED for good power for mid/late corner exit. The rear shock set up is then crucial at this point, as it must be soft enough to let the weight transfer BACK to the rear wheels, for good acceleration.:rollseyes: Quote Link to comment
71ka510 Posted September 25, 2009 Author Report Share Posted September 25, 2009 THANK YOU!!!! i read through almost all 16 pages..... and started going cross eyed... some people neve r stated how the car handled... now to just find someone that actually sells a 1200-1300# spring that fits ....... any leds on that..... eibach,coleman,bluesprings,belltech, all turned me away :( oh and afte r reading those... DON from ground-control must be nuts Quote Link to comment
thisismatt Posted September 25, 2009 Report Share Posted September 25, 2009 THANK YOU!!!! i read through almost all 16 pages..... and started going cross eyed... some people neve r stated how the car handled... now to just find someone that actually sells a 1200-1300# spring that fits ....... any leds on that..... eibach,coleman,bluesprings,belltech, all turned me away :( oh and afte r reading those... DON from ground-control must be nuts eh, sorry, I guess I should have copied more from the posts...they might have described the handling as well but I was just grabbing numbers. Quote Link to comment
DISLEXICDIME Posted September 25, 2009 Report Share Posted September 25, 2009 eh, sorry, I guess I should have copied more from the posts...they might have described the handling as well but I was just grabbing numbers. i see it took you a whole 5 minutes of reading on the first page to find some one running the same spring rates in the front ass him lol Quote Link to comment
71ka510 Posted September 25, 2009 Author Report Share Posted September 25, 2009 eh dont know how i missed it ;P . so i think ground control is crazy... 450 would be waaaaay too soft..... lame!!! Quote Link to comment
69FJWagon Posted September 26, 2009 Report Share Posted September 26, 2009 $525 for coilovers from Troy and you can get any spring rate you want well worth the money Clayton Quote Link to comment
71ka510 Posted September 26, 2009 Author Report Share Posted September 26, 2009 that is my plan......... when i can afford it.... but right now i need my daily driver to be on the road... and i dont have an extra $600 sitting around.... i got the fronts back when the economy didnt suck and i was making twice as much :( . So , just need something for now.... and i can get just springs for under $120 Quote Link to comment
kiznook Posted September 26, 2009 Report Share Posted September 26, 2009 why not just keep the cut springs and save up for the coilovers? I have 250# coilovers front and rear and it's a good set-up. dislexic has 225 in the front and cut stock springs in the rear and his handles just fine. Quote Link to comment
71ka510 Posted September 27, 2009 Author Report Share Posted September 27, 2009 just heard it will handle like garbage.... guess i wil try it for a bit...sinc e i cant find anyone selling a stiff enough stock location spring anyway.... and when i go coil overs.. i may be having a one of set made by a certain company that i can not mention.... hooray for prototyping..... Quote Link to comment
thisisastickup Posted September 28, 2009 Report Share Posted September 28, 2009 Instead of making a new thread, I'll ask here. -Where can I buy springs? -If I lower on springs, front and back, will I need new struts? What applications will work? Quote Link to comment
JDM510 Posted November 19, 2009 Report Share Posted November 19, 2009 (edited) alot of good reading here i have a point to make for a coilover application: Do any of you guys think that putting that stiff of a spring on not only a section of the body that is only designed for a shock, but the lower shock mount look's suspect to fail in my book. Thats why im on the hunt for a high rate spring that will go in the stock locaton aswell. also will moving the spring that much will also change as more leverage is being applicated???? ps i cut my stock springs and it rides like SHIT!!!!! Edited November 19, 2009 by JDM510 Quote Link to comment
hang_510 Posted November 19, 2009 Report Share Posted November 19, 2009 Do any of you guys think that putting that stiff of a spring on ... also will moving the spring that much will also change as more leverage is being applicated???? never heard of it failing. have heard of it being reinforced. its not moved much, so IIRC its merely a spring rate change to the leverage points. Quote Link to comment
JDM510 Posted November 19, 2009 Report Share Posted November 19, 2009 Yeah I was just thinking you know the coil belongs their. It's designed to be their. Why change it?? idk.... I just really cant get over the idea of all that wieght being on where only a shock was designed to go. (lower mount wise i know the body can take it) Quote Link to comment
Colbino Posted November 19, 2009 Report Share Posted November 19, 2009 What's the deal with these rear coil-overs? Has anyone ever tried them? http://designproductsracing.com/510_RearSuspension.htm Quote Link to comment
hang_510 Posted November 20, 2009 Report Share Posted November 20, 2009 design products makes excellent parts! Quote Link to comment
sssr20det510 Posted November 20, 2009 Report Share Posted November 20, 2009 What's the deal with these rear coil-overs? Has anyone ever tried them? http://designproductsracing.com/510_RearSuspension.htm dont see the rear coilovers ???? Quote Link to comment
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