Chuhatsu Plus MultiRoad lift springs
 

http://www.chuhatsu-plus.jp/86.html

In case anyone out there is looking to raise their cars for use in winter climates (or to build a budget rally car?), there are springs available that raise the car around 15-20mm from stock.

And no, this is not for everybody.

-alex

@BigFatFlip you sold your car too soon

Interesting find. Finally i see some products comming for rally-ish use too. 99% of aftermarket seemed concentrating on tarmac tracking & lowering crowd.
I wonder though how/if these will work well with stock shocks, lift seems a bit on a high side. Imho it's more interesting to try out TRD rally coilovers (MS260-18004 + MS250-18004 ) instead, which lift just 10mm, but probably better match changed springs with extra travel. Or lift spacers, that doesn't change anything to shocks/springs themselves, just mount them lower.

Chuhatsu springs on an 86:

http://media.frsport.com/Chuhatsu.png

mav1178: Any reviews/impressions (especially compared to stock)?

No idea but I can arrange someone to test them out, should they be interested.

These are of very little use in the US...

I'd be interested in trying them out through the winter in Chicago and in some winter rallyx up in Wisconsin. My only holdup would be the time/costs of installing them, getting the alignment done, and the uninstalling and getting a new alignment again in the spring.

Some more pics:

http://media.frsport.com/Chuhatsu1.jpg
http://media.frsport.com/Chuhatsu2.jpg

Actual springs are coated in a thick black paint for maximum rust prevention. Comes with longer bump stops as well.

http://media.frsport.com/IMG_1316.jpg
http://media.frsport.com/IMG_1317.jpg


If you have access to a spare set of stock shocks/upper mounts, I can provide the springs (free of charge). Send me a PM if you are serious about this.

If he doesn't jump on this I would, would love to drive this winter around Alaska in a lifted BRZ!

Are the rates similar to OEM? I'd be interested in a set of these with OEM struts if the rates were close to stock, ort better yet, a tad softer for winter use...

Waiting on a reply from Japan. Their site didn't list specific information.

Any ideas why you would use their longer bumpstops rather than having more travel before hitting the stock bumpstops?

I'm taking a guess and speculating that this has to do with preventing excessive amounts of suspension travel with stock arms.

The last thing you want is for the suspension to compress a lot and your handling is completely off because the alignment has changed so much.

Hmm, but in such case these longer springs + longer bumpstops seem will be like stock springs + topmount lift spacers in what user gets as ground clearance and how suspension will behave, or i am wrong? :/

You gotta look at it from Chuhatsu's perspective.

They made these from an OEM point of view. The question you should ask is: are top mount lift spacers approved for road use? If not, lift springs are the best alternative if you want to have zero issues with a vehicle on public roads.

This is mostly an issue in area(s) where key items on the car requires regulatory approval. It's why KW sells most of their road coilovers without top hats, as it won't meet TUV standards with pillowball or solid upper mounts.

Rally is life.

Sent from my Pixel XL using Tapatalk

Hey @mav1178

I'd love to be the test guy for these, if at all possible!

I run ST's in winter, and stock suspension with a 10mm lift shim in winter. I live in New England where we get oodles of snow, and run a Forester size winter so I can prove out just how much clearance difference there is.

I also do my own DIY string alignments with access to a rack, and installs so there shouldn't be any issue with confirming a proper setup.

(And have access to the @LiftedBRZ for back to back comparisons :P )

Finally, taller springs! I have been looking for them forever.

Hope to see the spring rates for the different sets. The spring rate of the set offered by TRD is too stiff, I am hoping for spring rates closer to the OEM rates.

Please let us know when you hear from Chuhatsu about the spring rates.

Thanks for the tip.

The taller bumpstops might also just be a different and softer spring rate, so that instead of hitting a shorter, sharper ramp up in spring rate farther down in the travel with OEM bumpers, you have a more progressive change earlier on. But, I don't know.

These would be fun with some custom valved Bilstein B6.

- Andrew

any update on these? anyone get to test them yet? any dealers in the US? I am very interested in these..

I got a set from them to test. I still have 2 autocrosses left this and next weekend. Then I'm gonna start my winter lift!

so you can run these with stock everything else? I'd be very interested, I seem to rub on absolutely everything, If the spring rate is oem or higher and the handling won't be destroyed anyways.

Things like this make me really excited for the twins to be around $5-10k in the future. The twins are going to be everywhere and at that price point I would not hesitate to install these springs and make a ice racer out of one.

The new 240sx

At <$10k engine swaps and suspension setups galore. But because you can find out how good they are on the internet, not word of mouth like the old days I don't think we'll see flatline <$5k prices for a long time, maybe never, kinda like WRX's there will always be demand for the chassis, at least where I live now. Some regions though I see people having trouble selling 86's at $13k in decent condition.

I just went and looked at WRX's and the only ones under $5k are 15 years old, nearing 200k miles and have problems. Ridiculous.

^Thats what I have been calling them. lol

We live in opposite worlds. In upstate NY there will never be a demand for the twins. People just buy WRX's bc they only want one car so it better be AWD. (We are #1 in the states for annual snowfall.) You rarely see the twins around here and yet you can throw a rock, skip it off one wrx and bank it into two others. Ill bet in the next 5-10 years they will be under 10k. At least in my miserable part of the world.

I'm waiting for Japan to reply about the spring rates.

MSRP $420 and raises the car approx. 15-20mm.

Waiting for a reply on the spring rates. They are meant to be reused with stock shocks.

Have you put them on and tested them yet? I'd love to know how they feel and perform.

I finally got them tested at Eibach.

Chuhatsu lift springs:
Front: 129 lbs/in
Rear: 206 lbs/in

For comparison purposes:

Car: Front OE Spring Rate:
Subaru BRZ 27 N/mm (153 lbs/in)
Scion FR-S 23 N/mm (131 lbs/in)

Rear OE Spring Rate:
Subaru BRZ 34 N/mm (195 lbs/in)
Scion FR-S 37 N/mm (211 lbs/in)

A bit of a hijack, but sort of related to Mav's post above: Are there different spring part numbers for our cars based on option packages/vehicle weight, or are all BRZ springs (non including special package models like PP, tS, etc) or FR-S springs the same rate? I've been wanting a set of BRZ front springs for my FR-S, but want to be sure my ride height is going to stay where it is right now. Since our cars have very few items that are optional, I assume they are all the same within a given model, but just want tbe sure.

Hmm, it looks, like fronts may become a bit overdamped then? As side gain, maybe car will be less understeery then stock even without camber changes.
P.S.
Maybe worth adding those rates to OP.

Thank you so much for posting the spring rate information.

Near OEM spring rate and an extra 15mm of wheel travel, I am ready to get a set.

How do I order a set for AT for delivery in the US?

Thanks for that. Interesting...basically close to OEM FRS spring rates.

- Andrew

Well, if you have extra travel available, you don't need a stiff rate to control movement in as restricted an area.

The fronts are barely softer than stock FR-S, so it may just be sample variation. Impossible to determine that conclusion based on one single spring test. In N/mm it's 22.68 front on Chuhatsu vs 23 on stock FR-S.

Are there any installation instructions in English? Any North American suppliers?

https://frsport.com/chuhatsu-plus-cp...z-zn6-zc6-2013

No need for installation instructions in English unless you're doing spring installation for the first time ever.

this is exactly what I need. Now to decide whether to use OEM dampers or get Konis...

If not the shortages of Bilstein, i'd also think of B6. Otherwise .. OEMs, if they are in good shape. Used MY2017 when they appear among classifieds. Koni yellows? Hmm, also probably may work.

I've had a set for sale for dirt cheap for months... A little damage, but they still work. I don't think anyone really wants them. "Coilovers and slammy McSlamerson, camber, Bruh."