FK8 Master Spring Thread!

After driving a bit more, I feel a little more stiffness when cornering and when hitting speed bumps (obviously) but the overall ride quality feels almost identical to stock imo. I may not be as sensitive to these things though, so take my impressions with a grain of salt.

Hopefully my impressions don't change as the springs settle.

r712 said:

Lowered on Spoon finally. First impression is that it feels a lot like stock. Will update once I get my new wheels on and an alignment in a couple weeks.

edit: fixed contrast in 1st photo to better show wheel gap and added side profile.

Click to expand...

Looks good! what wheel/tire specs did you go with? I have 18x9.5+35 on 265/18/35 - installing in a couple weeks.

Honda_Elite said:

Looks good! what wheel/tire specs did you go with? I have 18x9.5+35 on 265/18/35 - installing in a couple weeks.

Click to expand...

I have a set of 19x9.5 +45 Titan7 T-S5's coming in early next week. Still not entirely sure if I want to go with Spoon's set up and do 265/30/19 or if I want a higher profile instead and go with 255/35/19. So far I'm leaning toward the 255's since I can get a cheaper set. The 255's also seem to have less speedo error when I plug the numbers into willtheyfit.com. May go with the 265's next time if the 35 profile tires feel too floaty.

r712 said:

I have a set of 19x9.5 +45 Titan7 T-S5's coming in early next week. Still not entirely sure if I want to go with Spoon's set up and do 265/30/19 or if I want a higher profile instead and go with 255/35/19. So far I'm leaning toward the 255's since I can get a cheaper set. The 255's also seem to have less speedo error when I plug the numbers into willtheyfit.com. May go with the 265's next time if the 35 profile tires feel too floaty.

Click to expand...

Nice! I'd prob go with the 255/35 setup just for additional sidewall.

Yeah I'm thinking the same. Also noticed that you are going 265/35 with a +35 offset. Be careful of rubbing since I hear that could be an issue with 265 series tires and being lowered at that offset (unless you plan on doing fender trimming). I was told that would be an issue when I was originally going for a set of 18 inch gram lights at +38. This was the main reason I canceled the gram lights order and waited until I could afford the Titan7's at +45.

If lowered on Spoon/Eibach height, you may wanna go 255/35 if you want to avoid fender work.

r712 said:

Yeah I'm thinking the same. Also noticed that you are going 265/35 with a +35 offset. Be careful of rubbing since I hear that could be an issue with 265 series tires and being lowered at that offset (unless you plan on doing fender trimming). I was told that would be an issue when I was originally going for a set of 18 inch gram lights at +38. This was the main reason I canceled the gram lights order and waited until I could afford the Titan7's at +45.

If lowered on Spoon/Eibach height, you may wanna go 255/35 if you want to avoid fender work.

Click to expand...

Yup! lol we will see very soon if its going to rub - I mainly went with the 265 to cover the 9.5 inch wheels fully (no stretch) for extra protection. If it rubs I do have a body shop which could trim the fenders and also protect against rust. But i totally understand going with the 255 to avoid modification to fenders - I almost returned my 265 set to go with the safe 255s based on my offset.

Where did you guys order your Spoon springs? In stock?

hafadaze said:

Where did you guys order your Spoon springs? In stock?

Click to expand...

I ordered mine from gotuning.com I would give them a call, they recently received a batch of numerous spoon items from Japan.

hafadaze said:

Where did you guys order your Spoon springs? In stock?

Click to expand...

I got mine from Nengun. Took a couple weeks to get to me since they didn't ship it immediately, but the package was shipped EMS straight from Japan. Not sure if they are in stock since I actually had the springs for a month before they were installed.

Fairly new to the aftermarket wheel/suspension scene. Would there be any risk of rubbing on eibachs with the nsx 19" with 255/35? Would 18s be better for comfort/performance with the .8" drop? I prefer the oem+ look

Estoril4 said:

Fairly new to the aftermarket wheel/suspension scene. Would there be any risk of rubbing on eibachs with the nsx 19" with 255/35? Would 18s be better for comfort/performance with the .8" drop? I prefer the oem+ look

Click to expand...

You won’t rub with those wheels since they’re nearly OEM offset. 18s are going to be more comfortable due to more tire, but I doubt the 19s are going to feel bad by any means.

02SilverSiHB said:

Too many to list. I've had full coilovers such as buddy club and tein. I've had h&r skunk2 progress ground control etc. I've had all my cars lowered: Acura RL, 02 SI, GC8 WRX and EVOII while in Japan, 2007 Si, 2011 Si, 2005 STI, 2013 Si, 2006 Accord, 2003 Accord

The best ride was on buddy club coilovers...for the street. Best suspension for autocross for me was GC and koni struts

Click to expand...

02SilverSiHB said:

I know it's not much stiffer, but it does lower the amount the stock strut can travel. I've hit some bumps that make me feel like the 20s are going to come up through my fenders...like I'm rocks.

As for driving along on perfect roads, it's fine and not toooo jarring, but there are times where you do get that jarring feel on unstable road conditions...you'll feel the car rumble side to side (jarring feel).

I also felt that it didn't help in regards to the handling of the car.

I sometimes feel like putting my stock ones back on, but know I'll miss that slightly lower look. I just try to avoid certain roads that I know have some bad bumps, etc.

Click to expand...

ok reason i asked is i beg to differ with you on your assessment of eibach pro kit springs and is counter to all i've lived with for 6 months now on them. the damper (or as you called struts) travel does not determine ride stiffness. damper is just that dampens the oscillation of the springs if in an ideal world where no friction else springs oscillates forever. also, "jarring or rumble" is very odd to me.

in fact the car has a better ride than stock. here's why...eibach pro kits are spec'ed as follow compared to stock:

yes there is less suspension travel whenever you lower the springs ala shorter springs which then requires the springs to be stiffer than stock in order to not bottom out. what you're feeling in stiffness comes from springs, not dampers. also the springs are progressive on the rear vs stock rear linear. reason why eibach and others like h&r and spoon (both similar specs to eibach pro kit) went with progressive rear springs are to maintain stock ride comfort on initial compression (short bursts) for a bump or on initial turn in in a corner. the increased 11% and 17% ratings are at max compression, not when unloaded.

also there's a very very mild reduction in initial understeer entering a corner with the pro kit and very very mild increase in oversteer due to the respective increases of spring rates.

questions i have are:

just curious since your assessment is very different from mine and many others.

Estoril4 said:

Fairly new to the aftermarket wheel/suspension scene. Would there be any risk of rubbing on eibachs with the nsx 19" with 255/35? Would 18s be better for comfort/performance with the .8" drop? I prefer the oem+ look

Click to expand...

i'm on eibach pro kit with oem 19" nsx wheels and 245/35/19 re71r tires (soon to be on titan 7 18x9.5+45mm t-r10 wheels and michelin x-ice 245/40/18 snow tires). you will not rub with 255/35/19 on same eibachs and same nsx wheels. however, that tire size is a bit off and will have speedo error if you care about it. 245/35/19 is perfectly fine and comfy. i have 2800 miles now on my re71rs since april. if you want close to oem look, then stay with 245/35/19 to be perfect with speedo while reducing wheel gap and have comfort.

18" will need to be 245/40/18 to be near stock speedo again and same reduction in wheel gap as the 19" setup with 245/35/19.

so you'll notice the trend: stock 245/30/20...245/35/19...245/40/18 are what you want to do. all will have zero rubbing in rear.

on caveat and applies to all the above - don't go wider than 9.5" width on the wheel and less than +45mm offset and you can run as high as 275 wide tires on front and 265 tires on the rear with eibach pro kit and zero rubbing.

those who rub are doing bad offsets such as +38 or +35. the rear especially is where they all get into trouble whether they admit it or not.

for street use 245 width. for track ideally do 265 or 275 wide front tires and 245 wide rear tires for better and quicker turn in and reduction of low speed understeer.

ctrmofo said:

i'm on eibach pro kit with oem 19" nsx wheels and 245/35/19 re71r tires (soon to be on titan 7 18x9.5+45mm t-r10 wheels and michelin x-ice 245/40/18 snow tires). you will not rub with 255/35/19 on same eibachs and same nsx wheels. however, that tire size is a bit off and will have speedo error if you care about it. 245/35/19 is perfectly fine and comfy. i have 2800 miles now on my re71rs since april. if you want close to oem look, then stay with 245/35/19 to be perfect with speedo while reducing wheel gap and have comfort.

18" will need to be 245/40/18 to be near stock speedo again and same reduction in wheel gap as the 19" setup with 245/35/19.

so you'll notice the trend: stock 245/30/20...245/35/19...245/40/18 are what you want to do. all will have zero rubbing in rear.

on caveat and applies to all the above - don't go wider than 9.5" width on the wheel and less than +45mm offset and you can run as high as 275 wide tires on front and 265 tires on the rear with eibach pro kit and zero rubbing.

those who rub are doing bad offsets such as +38 or +35. the rear especially is where they all get into trouble whether they admit it or not.

for street use 245 width. for track ideally do 265 or 275 wide front tires and 245 wide rear tires for better and quicker turn in and reduction of low speed understeer.

Click to expand...

Appreciate the detailed response. Would a 255 have noticeably more grip in the dry/be more sketchy in the wet than the stock 245 or not so much? Also, may be a dumb question but with the speedo being digital is there no way to apply a correction factor?

ctrmofo said:

the damper (or as you called struts) travel does not determine ride stiffness. damper is just that dampens the oscillation of the springs if in an ideal world where no friction else springs oscillates forever. also, "jarring or rumble" is very odd to me.

Click to expand...

I never said the struts/dampers make it more stiff due to the travel...I was referring to the fact that it has less travel makes it feel a bit jarring...as in the side to side sway feels less controlled now vice when it was on factory springs. As in the damper is trying to keep up, but can't.

ctrmofo said:

in fact the car has a better ride than stock. here's why...eibach pro kits are spec'ed as follow compared to stock

Click to expand...

That's your opinion in regards to prokit being better than factory IMO...reducing the shock travel degrades the performance over all.

ctrmofo said:

yes there is less suspension travel whenever you lower the springs ala shorter springs which then requires the springs to be stiffer than stock in order to not bottom out. what you're feeling in stiffness comes from springs, not dampers. ...

Click to expand...

Again...I don't know why you keep saying stiffness is from the springs and not the dampers...I never said that, lol. I know this...Jesus

ctrmofo said:

questions i have are:
- were the 4 bump stops properly cut by 21 mm as specified when they were installed? i'm aware of quite a few who forgot to cut the stock bump stops.
- which wheels and tires are you running with the eibach pro kit installed?

Click to expand...

Yes, I followed the instructions and cut the bump stops accordingly.
As for the wheels: Both factory and right now I'm on my winter setup (Titan7 18x9.5, 265 tire).

Just remember, my road conditions may not be like yours. I'm in Maryland...the roads suck. If I was in Florida, I may not even notice it.

Overall, I've thought a lot about taking these off...just might and go back to stock. I won't look as great, but oh well.