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JRI 4 way, installing this weekend, these should be awesome on track. Did a revalve to get my track settings into the middle of the adjustment range from when I ran them as 2 way and added the cans for more adjustability. Hoping these are going to be way better than the MCS 2 way non remotes I was running. Times indicated as such when running the JRI 2-way.
JRI 4 way, installing this weekend, these should be awesome on track. Did a revalve to get my track settings into the middle of the adjustment range from when I ran them as 2 way and added the cans for more adjustability. Hoping these are going to be way better than the MCS 2 way non remotes I was running. Times indicated as such when running the JRI 2-way.
They are orders of magnitude better than MCS but not because of adjustability. Also cannisters really only give you more control for compression only. JRI are good people, lot of former Penske talent there.
They are orders of magnitude better than MCS but not because of adjustability. Also cannisters really only give you more control for compression only. JRI are good people, lot of former Penske talent there.
Yes agree, all my JRI stuff comes through JJ Furillo and Ultimate performance built to spec. JJ has lots of time at Penske and was one of the founders of JRI, awesome guy who knows his stuff.
What were the differences in feel between JRI and MCS? I'm currently working on my MCS 2 way setup, and I find myself pretty much hitting the highest settings on the shocks to get enough feedback from the tires at the track. I might be doing something wrong as well of course, but would love to hear about your experience..
What were the differences in feel between JRI and MCS? I'm currently working on my MCS 2 way setup, and I find myself pretty much hitting the highest settings on the shocks to get enough feedback from the tires at the track. I might be doing something wrong as well of course, but would love to hear about your experience..
JRI uses better internals. You they know how to make valving work vs throwing tons of bleed at the problem. They also have very good isolated bleed circuits which means you can get their adjustable setup and it won't cross talk (which is when on cheaper adjustable shocks you make let's say a rebound change and it will also affect compression)
JRI uses better internals. You they know how to make valving work vs throwing tons of bleed at the problem. They also have very good isolated bleed circuits which means you can get their adjustable setup and it won't cross talk (which is when on cheaper adjustable shocks you make let's say a rebound change and it will also affect compression)
Yeah I had the MCS on the shock dyno and it revealed how much bleed through they had.
@X25 I like you was pretty much maxed out on the MCS adapters in terms of stiffness. The JRI are much heavier valved and as TX_Chassis_Tuner mention uses better internals. With the JRI, I was approaching max setting as well off the shelf, but he just re valved to put my track settings in the middle of the valving. No real limitations in these.
If I get them installed, I will be running the car on track Sunday. Fronts are in, just need to do rears and find a spot to mount the rear cans before we do the custom lines.
Looking forward to hearing your feedback. I never feel fully confident with my current setup, especially at the rear. I'm not a pro, and it might be just me or perhaps the characteristic of this car that cannot be changed by just coilovers, but I'm certainly feeling a gap compared to my C7 Z06 setup.
If I were sure a different set of coilovers would 'change' the feel drastically for the better, I'd order one right away, so I'll be looking forward to hearing from experiences of you and others. I'm also interested in GSpeed's kit, since I know they heavily track test their products... https://www.gspeed.com/collections/c...45126567723178
Looking forward to hearing your feedback. I never feel fully confident with my current setup, especially at the rear. I'm not a pro, and it might be just me or perhaps the characteristic of this car that cannot be changed by just coilovers, but I'm certainly feeling a gap compared to my C7 Z06 setup.
If I were sure a different set of coilovers would 'change' the feel drastically for the better, I'd order one right away, so I'll be looking forward to hearing from experiences of you and others. I'm also interested in GSpeed's kit, since I know they heavily track test their products... https://www.gspeed.com/collections/c...45126567723178
Shocks can make a night and day difference. You can have the same total force but have the shock build that force differently. Such as linear, progressive, or even regressive. If you were to swap the same shock with different valving you would be able to feel huge differences.
What is the rear of the car doing? It might very well be a compound issue. However, most "aftermarket" shocks use huge amounts of rebound 2:1- 3:1 or more rebound to compression. If there is too much rebound in the rear the car can end up picking up a wheel at various moments in turn entry/exit. Which causes lots of uncertainty in the feel of the car. Usually some amount of oversteer.
The C8 already has a large amount of front roll couple so that is where the under steer comes from. Similar to Porsche it's terminal under steer and without areo, changes you make for what you think is the more rotation in the rear that you need will only result in an unpredictable car. The main area for opportunity is differential changes, a different line through a turn, and an amount of maintenance throttle. This is of course generalized guessing. Without more details from you, that's all I can do.
As always, thanks for your input! C8 has definitely been a learning experience. OEM setup was good with OEM tires and we were able to do amazing lap times, but felt way off with aftermarket (18" or 19") wheels and tires with much larger side profiles. I wish trying a different set of coilovers could be as easy as trying a different suit, but with all the cost and time to tune involved, it's hard to go for it on a whim : )
Nevertheless, looking forward to all the feedback like many other forum members...
Looking forward to hearing your feedback. I never feel fully confident with my current setup, especially at the rear. I'm not a pro, and it might be just me or perhaps the characteristic of this car that cannot be changed by just coilovers, but I'm certainly feeling a gap compared to my C7 Z06 setup.
What modifications have you made? I found an increase in rate on the rear sway bar to have been beneficial for mid-corner to corner exit understeer issues. Perhaps it could have been mitigated entirely by throttle management, but I tried for a season and couldn't achieve what I wanted. I swapped in the Eibach rear bar (others seemed too stiff from my evaluation) and now I'm smoother and quicker out of the same corners at my local track that used to be an issue.
What modifications have you made? I found an increase in rate on the rear sway bar to have been beneficial for mid-corner to corner exit understeer issues. Perhaps it could have been mitigated entirely by throttle management, but I tried for a season and couldn't achieve what I wanted. I swapped in the Eibach rear bar (others seemed too stiff from my evaluation) and now I'm smoother and quicker out of the same corners at my local track that used to be an issue.
MCS 2-way, Z51 sway bars front and rear (half way between Eibach and OEM Z06 if I recall), and wheels/tires (295/345 R7s or similar in 18" or 19"). The lap times are not too bad actually, but they're a few seconds behind my C7 Z06 times with similar setup. Indeed, a rear bar could be something very simple to test out..
Another tidbit: I keep cording the rear tires first from the inside shoulder of the inner tire to the track turn direction, and I heard of this from others, too. Ignoring possibility of too much camber (I'm at -3.1 / -2.6), this tells me that the rears keep proper contact on both ends in corners, so I suppose rebound is not too high(?) despite being almost maxed out on shock settings. The rears lean quite a bit, which sway bars could change, even though most people say sway bars should be there to fine tune, and not "fix it" : ))
Another tidbit: I keep cording the rear tires first from the inside shoulder of the inner tire to the track turn direction, and I heard of this from others, too. Ignoring possibility of too much camber (I'm at -3.1 / -2.6), this tells me that the rears keep proper contact on both ends in corners, so I suppose rebound is not too high(?) despite being almost maxed out on shock settings. The rears lean quite a bit, which sway bars could change, even though most people say sway bars should be there to fine tune, and not "fix it" : ))
I see the same with rear tires and run much stiffer sways
By the way which sway bars are you running, and what spring rates did you end up settling with?
I am running a mix right now and havent decided where Ill end up. I ran AFE on my stingray with MCS 2WNR. I put the same set up on the Z and it was too stiff, particularly the rear. At this time I ran middle setting on the front and the softest setting in the rear (75% stiffer front and 100% stiffer rear than Z51).
I then purchased Eibach (edited, had AFE again by mistake listed here) bars but had only swapped out the rear (went from 600lbs to 480lbs I believe) and just went to softest setting in front on AFR bar. This ran decent.
I then swapped in the JRI 2 way with 650# front springs and 750# rear springs with much heavier valving that MCS. This was too soft. Tried 750/850 and still felt too soft. Currently going to 850/900 but waiting on 850# front springs.
I ran the 4 ways yesterday with the 900# in the rear with still having 750# front but increased front sway bar stiffness and it ran great. Once I get the 850# front I will increase rear bar stiffness or bring the front back down.
Ill try to post a video of my best lap yesterday, was a small track but lots of fun, first time going there.
I am running a mix right now and havent decided where Ill end up. I ran AFE on my stingray with MCS 2WNR. I put the same set up on the Z and it was too stiff, particularly the rear. At this time I ran middle setting on the front and the softest setting in the rear (75% stiffer front and 100% stiffer rear than Z51).
I then purchased AFE bars but had only swapped out the rear (went from 600lbs to 480lbs I believe) and just went to softest setting in front on AFR bar. This ran decent.
I then swapped in the JRI 2 way with 650# front springs and 750# rear springs with much heavier valving that MCS. This was too soft. Tried 750/850 and still felt too soft. Currently going to 850/900 but waiting on 850# front springs.
I ran the 4 ways yuesterday with the 900# in the rear with still having 750# front but increased front sway bar stiffness and it ran great. Once I get the 850# front I will increase rear bar stiffness or bring the front back down.
Ill try to post a video of my best lap yesterday, was a small track but lots of fun, first time going there.
The more roll bar you use the softer your springs will need to be. Are you using tire temp and contact patch data to inform your changes?
100% agree on the softer springs with the stiffer bars. I can also go further lower on springs with the heavier valving. I need to get a pyrometer and start tracking temps, currently just using contact patch, psi and feel to dictate adjustments.
100% agree on the softer springs with the stiffer bars. I can also go further lower on springs with the heavier valving. I need to get a pyrometer and start tracking temps, currently just using contact patch, psi and feel to dictate adjustments.
NASCAR has run BBSS (big bar soft spring) setups for a while now. You might be able to rediscover some solutioning for your setup. I would caution you though you may end up quickly overworking one or both ends of the car without additional aero. Ultimately you should be making adjustments based on tire temps and what the contact patch is doing. Never mind how the wheel looks or what you think you feel (not that it is not valuable, but truly you can get away with some peculiar setups that just work). Drive the car based on the stop watch and tire temps.
I am running a mix right now and havent decided where Ill end up. I ran AFE on my stingray with MCS 2WNR. I put the same set up on the Z and it was too stiff, particularly the rear. At this time I ran middle setting on the front and the softest setting in the rear (75% stiffer front and 100% stiffer rear than Z51).
I then purchased AFE bars but had only swapped out the rear (went from 600lbs to 480lbs I believe) and just went to softest setting in front on AFR bar. This ran decent.
I then swapped in the JRI 2 way with 650# front springs and 750# rear springs with much heavier valving that MCS. This was too soft. Tried 750/850 and still felt too soft. Currently going to 850/900 but waiting on 850# front springs.
I ran the 4 ways yuesterday with the 900# in the rear with still having 750# front but increased front sway bar stiffness and it ran great. Once I get the 850# front I will increase rear bar stiffness or bring the front back down.
Ill try to post a video of my best lap yesterday, was a small track but lots of fun, first time going there.
LOL, I was just chatting with you on FB regarding this video. And here you are again! .
right, I don’t post many of these on here but was talking about running this new coilover set up, felt way better than my MCS set up, will be posing those for sale shortly….
New Shock set up, these will be fun
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