BASITH PH better dirty

Jdm jay that’s for Subaru

BASITH PH tru😂

Yeah these rates seem optimised more for a car on slicks and with some aero work...

Geometry controls roll, squat/anti-squat, dive/anti-dive. Springs suspend the vehicle. Shocks/struts dampen spring action But as a bandaid springs can reduce weight transfer. Weight transfer is determined by center of gravity. Higher the cg the higher the force is applied relative to tires causing the car to rotate on an axis. The axis of rotation on cg is controlled by relation to axis created by suspension gemetry, rollcenter. If rollcenter is incorrect it creates more roll/squat/dive causing the cg to dynamically change to a higher position. The higher position dynamically makes the problem worse. Higher spring rates reduce the dynamic change and reduce the weight transfer but limit suspension travel & ability to tackle bumps. But it’s a bandaid. Ideally you want correct rollcenter if physically possible.

Tom Jones excellent explanation. But assuming the k1 vs k2 are at equal ride height , the geometry doesn’t change and therefore RC, CoG etc don’t change. So the stiffer springs would allow weight transfer to happen more quickly - that was my train of thought anyway. Your explanation was much better nonetheless.

As I stated but did not fully explain the relevance, softer springs allow more suspension travel. Given very similar g-forces applied (mostly limited in this case by tire friction) the soft spring will allow the suspesion to move the rollcenter further from cg. This is what I meant by it dynamically getting worse. So for example, if car is lowered 2.5” putting it outside of reasonable rollcenter. As the suspesion travels further due to soft spring rates it moves another 3” for total of 5.5” out of spec. With stiff spring rate the suspension might move 1” for total of 3.5” out of spec. Every 1” out of spec at the ride height maybe amplified by 10 times at actual rollcenter depending on physical geometry. So 3.5” vs 5.5” might be 20” difference in relationship between cg & rollcenter. 20” change in relative leverage is significant. From your point of view the initial force applied is equal therefore equal force is transferred to the tires regardless of how much spring compresses and if roll center and other factors remained constant that would be true. But what I’m saying is the suspesion dynamically moves further and further away from ideal rollcenter. And that causes more roll, squat, dive.

Tom Jones good explanation that just got better. This is great. A video should be made with animations showing this. I think it would be very helpful as it’s something that’s hard to visualize even when you understand. I never even thought of those effects honestly.

True man for the extra hundred bucks spent on the k2's you can get performance parts to go a bit faster

Actually it sounds like a its pogo sticking. Because those cheap ktuned can't handle the spring rates.

Agreed that it went a bit wrong there, but that said your spring rates argument is also quite flawed. Entirely depends on suspension geometry and motion ratios. Personally, on this car squared rates would probably work pretty good, but not more on the rear. Otherwise car becomes too sketchy under braking and you lose time there. The rest of the balance you get with the wider front tyres/wheels which just makes sense, and a bigger rear swaybar (without overdoing it obviously).

@@WilliamLevesqueineX Agree that beefier rear bar on FWD car is a know simple first suspension mod to reduce understeer without drawback. Even just a bushing replacement on an OEM bar with 100+kms on it can make a big difference. It did on my ITR DC2. Car had 120ks on it and just replacing the rear sway bushes really reduced the understeer and made the car much more agile when autocrossing. Would have been even more so with a beefier bar.

@@WilliamLevesqueineX Yes, always effective rate :) I wish I could post photos here, I have an in car adjustable twin blade ARB on the rear of my car, the biggest thing you can do for FWD handling, and you can change it as the tyres come on

The interesting thing is that Japanese tuners tune FWD racecars completely opposite. They set up FWD cars to have a front bias: front springs stiffer than the rear, front anti-roll bars thicker or just as thick than the rear, and often wider track in the front compared to the rear. The difference in driving dynamics is huge. Both rotate, but heavy rear biased cars seem to snap oversteer during throttle lift and are more "lively" in quick side-to-side transitions whereas the front biased FWD cars seem a bit more balanced and more forgiving of sudden inputs.

@@TrackSol yes, that's interesting. I use stiffer rear springs than front and a thicker rear bar with same size tires but looking at the Japanese racers I don’t know which one might be better! would they be smarter?

Waviness?

Jacob Walls while waviness might not be the best word if you watched the video you would know exactly what he’s talking about, it’s because the car is so stiff and bouncy the driver can’t maintain a smoothness on the gas pedal and you can hear it in the video

I can hear the waviness in drivers voice too. Yeah springs are too stiff.

Dampers are probably naff as well

i've just fitted BC coilvers to my MK1 golf, they are street springs and are 5kg front and 3kg rear. 20 and 16 sound very high!!

Welcome and thank you!

Yup. I think the front tires will get more grip too

The car will oversteer too much.

Because that's boring and doesn't keep the sponsors happy. Great way to prove how useless K2 was in this scenario. The right bracing is needed to support stiffer springs.

@OCD Stig I disagree, these 88-00 civic and 90-01 integra chassis benefit greatly from stiffer sway bars, especially when paired with coilovers

@Lucky Rooster You know whats up. Makes a huge impact on the car. Its a shitty long job to do but its worth it.

@OCD Stig going from an em1 13mm to a 22mm ITR rear bar was noticable for me even with the stock suspension

Swaybars make a HUGE difference if done properly. Seam welding and suspension bracing would also make a noticeable difference. But if the car is still driven on the street, the softer springs could still be used and the ride wouldnt be terrible

Made in Ontario Canada

@@jonnyweber3311 made in Taiwan. Says on the box they come in

Nah man. I have 12k and I want stiffer. Once you get used to it, it feels soft. It just depends on your preferences. I personally like stiffer suspension with good amount of rebound. But that's just me.

from a aero standpoint the coupe is better. from a weight standpoint the hatch is better. in real life there is not really that much in it.

Amr is a brand or what?

@@jona_ej2330 Yes, AMR Engineering. Built to order.. you can get Swift springs with them as well.

@@BESTNOODLEREVIEWS what are the rate springs? Visit the website and not see anything, thanks!

@@jona_ej2330 You have to tell them what rates you want and what you'll be using it for. Street/Circuit/Drag/etc. They'll valve it and build it to how you want it.

@@BESTNOODLEREVIEWS ok! Thanks man!

Yes, rear should be stiffer, even allowing for static weight distribution the load is about the same when the rear should be 50% more, but these are off the shelf fashion accessories

Add bigger swaybars! Bigger rear bar would also help turn the back end

@@notso100 filed under "reasons to go with companies that offer custom springs"

Higher rear rates and massive ARB’s are just bandaids for poor geometry.

@@grantd007grantd agree on ARBs, disagree on spring rates.

Bahahahaha

This one look like a truck :-)

@@serlegar ?

@@Aiello_ Big fat Porsche 911 driving in slow motion.

@@serlegar oh haha

Driving expensive car slowly syndrome so it doesn't go into the ditch

Nope in Euro 2 atleast

@@manelfernandes17 Thanks for replying, I asked because here in Asia I've never found or seen a Civic Coupe before, other than the North American spec versions for LHD markets.

@@aaronbryan5095 first off they are in canada....

That reading kept going up to 163+ during the video, is that possibly oil temp?

@@ChrisHale0629 Not Possibly, 100%.

its a water temp - not wideband. WATER / OIL pres / OIL Temp

We have a video coming out sometime in 2019 :)

@@speedacademy hope its early so I can choose wich tires to run next season. Looking for same staggered tire size you are running on the coupe 👍