Two piece vs one piece shocks - What's the dealio?
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- čas přidán 28. 12. 2021
- Another deep dive into suspension nerdery. This time we discuss the differences between one and two piece shocks, or lego shocks as I call them.
MX5 Miata - Supermiata.com
86, Mustang - 949 Racing.com - Auta a dopravní prostředky
Emilio and the team has been killing it lately with the content. Keep it up yall!
16:35 to the end of the video is a great explanation on the limitations of a multi-piece coilover with too short of a shock body. A lot of people still won’t get this, but this stuff is appreciated for those trying to learn.
loving all the recent video content
One thing I think that isn’t well explained here - with the 1-piece body coilovers that you adjust ride-height by the spring preload…while the total suspension travel (full compression to full extension) is unchanged/independent of preload, where you sit in that travel at rest (car on ground) does change. The more pre-load the higher the ride height AND the more compression/bump travel vs. droop travel (same total top to bottom travel however). Less preload/lower ride height will be the opposite; less bump/more droop. You state the you have the same bump/droop travel regardless of preload but it's the total suspension range you are talking about, not thet bump/droop travel. The 2-piece are the same, however the overall travel is lower. What the shock length adjustment does is allow the bump/droop to be independently adjusted (via preload) while setting the car’s ride height with the shock length - this could get complicated, and you state this in the video. The issue with the 2-piece to me is that you get less overall top-to-bottom suspension travel as you state in the video and you may go so low that the wheel can contact the top of the fender - you explain that pretty well. Hope this makes sense. I definately agree on the misunderstanding of pre-load and the impact on the spring rate (zero!) in the car community.
loving all this content!!! keep it up! you guys are great
Awesome video, very informative! Thanks for the info
After doing a boatload of research, I ended up buying these for my ND. This makes me even more excited to get them! I kicked around a few others for that 2k range, but I couldn't find all of the features he's describing in this lower price range. There were always compromises. These definitely seem like the best bang for your buck in a real motorsports shock.
You are going to love your Xidas!
MCA Suspension came 2nd in Pro class @ WTAC 2015 on 2 piece production shocks under $3000AUD on hammerhead. Info makes sense though, unfortunately nothing here in Australia of a 1 piece shock so servicing/local support is a real problem.
There will always be random good race results for cars on 2 piece shocks. But at the top level, they are not used, for obvious reasons. That pro class car was funded by by a wealthy amateur. It was not a company that earns money by racing. So not pro in the true sense :)
Loving the content; I'm learning a lot. I'm curious if you have any updates on the Tecnas for NA/NB?
Get yourself a set of Xidas, you wont be disappointed!
@@johnjennings4272 I already have one set of Xidas for my track NA, and have a 2nd set for my daily ND in the mail; I'm good. But many people, including some friends, want to spend in that $1k range, and SuperMiata have Tecnas on their site as 'Coming Soon' for quite some time...
No news or ETA. Still working on it.
shit, oem Bilstein with eibach 20-30mm lowered springs are awesome to drive for daily.
Love my Xidas😊
Emilio is dead on about the limitations of two-piece shocks. They CAN work depending on your application, but I've always found them to be a bit hamstrung in one way or another - namely available shaft travel. I have found rare instances where a vendor will customize them to have longer bodies and shafts to accommodate more travel(120-135mm range) and be able to use helper springs, but most that I've seen have an 85mm shaft where if you have a lower motion ratio and light car may be useable, but still not ideal. I went with a 2-piece shock for my FR-S because that's what my budget allows at the moment. They definitely sacrifice ride quality a fair bit on the road, but I don't drive the car much these days outside of driving to the track. They do what I need at the track, which is dial up the rebound damping to keep the car reasonably settled.
My understanding is that if a two piece coilover requires a helper spring, it means that at full droop the main spring isn't really loaded, which means that the damper has enough stroke for the full range of motion. In that case the only downsides left are oil capacity and heat dissipation?
A 2 piece may require helpers but fundamentally, they always give up stroke to a bespoke one piece shock. That adapter always takes up more space than no adapter. The 2 piece will also always weigh more for a given stroke.
Good question. Might be wrong but my understanding is: getting full stroke is not enough. With longer cylinder, you get the mid-range strokes (high quality strokes because of gas pressure was at proper range maybe) most of the time instead of constantly using the very end of the compression strokes (very high gas pressure) with a shorter cylinder.
Excellent video.
Thanks Jeff. Particularly happy, coming from a guy like you that has way above average shock nerd cred ;)
You are just bagging all 2-piece coilovers under the alibaba-chinese deal. However I am sure you know that there are many top end brands that offer 2 piece coilovers (tein, HKS, feal, ohlins etc) for many high performance vehicles, that actually bring great results. Are you suggesting that Feal e.g., that is an FD race-winning company, offers an inferior product? Even off-the shelf BC's have proven to be able to win races. I think it is fine to advertise your product, and i also think it actually is a fine suspension kit, however it is not nice to refer to everything else like this, especially when it has been proven that they work. Cheers
We are simply detailing the differences, strengths and weakness of each type. No FIA level pro motorsports teams use 2 piece coilovers outside of a few drift and time attack teams. You won't see them at Le Mans, Dakar, WRC, DTC. Every consumer has a choice and should do their own research.
It's funny to see TEIN and Ohlins referred to as "top end".
@@TimurIskhodzhanov well ohlins has multiple LeMans, super formula, WTCC rallycross pikes peak etc trophies. I think i will trust them more than a guy with Tein on his BR-Z sorry guy :D
Ohlins for sure have superior products. But the fact that they are wining trophies doesn’t mean that their particular product for a given platform is better than other vendors products. It depends on the particular products they use for racing and those they sell in bulk for commercial cars. If you look on Ohlins shocks for miata for example and compare it with e.g. Xida shocks you have here the travel limitation on Ohlins becouse of its two piece design. You can’t do anything about it, it’s just physics and even company such as Ohlins can’t outsmart it. They are for sure capable of making top-level one piece shock custom for specific platform but than it will cost much more. Their strategy was obviously to keep the price at competitive level but they had to sacrifice the performance to manage it.
@@jakubsrot764 I totally agree with you, and it is my point exactly: for the price tag some 2-piece are very close to performance to 3X-price coilovers