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08-09-2022, 09:27 PM | #89 | |
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08-09-2022, 11:46 PM | #90 |
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grip was better on 295/30/18 Nankang Ar1, but most recent on Pirelli DH 285/645/18 and can't get grip.
spoke with Brett Strom today and he thinks the DH is my problem, I dont have the right setting for it and tire is rolling over. Despite of understeering he says I need more front bar or increase my spring rates.
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08-10-2022, 11:02 PM | #92 | |
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slcook54 this is what you should look into in the future since you were looking into outer shoulder wearing too.
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08-13-2022, 10:40 AM | #93 | |
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08-13-2022, 02:15 PM | #94 |
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Front Uprights update
What suspension are you on and what are the current rates? What kind of aero are you running? Have you tried adjusting the bars, assuming you have adjustment there? Is it your first time running slicks and you need to dial in the tire pressures? I've never ran slicks so I know if struggle with that big time. There are a lot of variables that could contribute. It could also be that the uprights aren't right for your set up so something has to change. I know strom developed the uprights so I would pick their brains a bit more and keep us posted with the findings!
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08-13-2022, 03:01 PM | #95 | |
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08-13-2022, 04:04 PM | #96 | ||
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GT4 factory front Lip with canards 9lives racing 65" rear wing sway bar was at the soft setting (cause understeer behavior) dialed pressure with tire pyrometer and pressure gauge spoke with Strom and main thing they request is for spring change front and rear 1000lbs front and 1200+ rear but they said good luck trying to find higher than 1200. suggested to convert to true rear coilover -- Ground control race plates.
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08-13-2022, 05:26 PM | #97 | |||
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I have a set of 1300 2.5 ID springs floating around if you wanna give them a go. I can't recall the length. Id have to dig them up. |
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08-13-2022, 05:35 PM | #98 |
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@tlrid3r I have some 1300-1500lb (KW) springs you could test as well, but you would need to convert to true rear. They're too short to run divorced…spec some MCS' and sell the TTX to me
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08-13-2022, 06:02 PM | #99 | ||||
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///M3... Don't want more power, Just want it to turn sharper one step closer each time. -Ohlins TTX Raceline, PolePostions seats, Akrapovic EVO, ARC-8, 1/2 Cage, Seat Delete, Stoptech BBK, solid Subframe and diff bushing, spherical bearing on everything.
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Lienrocs703.00 |
08-13-2022, 06:06 PM | #100 |
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They recommend something like 800 on true rear coilover. My TTx can be ran as true rear coilover with just spring change. They are setup for it.
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08-14-2022, 12:57 PM | #102 | |
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08-14-2022, 01:16 PM | #103 |
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Yeah simply put. I'm realizing scrubs was a bad idea. Mainly I'm not a good enough driver nor have a car capable of utilizing the benefits.
Only reason I did scrubs was because mid pandemic, tires were unavailable. I'll report back with street tires if I get any progress.
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///M3... Don't want more power, Just want it to turn sharper one step closer each time. -Ohlins TTX Raceline, PolePostions seats, Akrapovic EVO, ARC-8, 1/2 Cage, Seat Delete, Stoptech BBK, solid Subframe and diff bushing, spherical bearing on everything.
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08-16-2022, 11:36 AM | #104 |
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One more question. What ride height are Strom upright users running.
From rim bottom lip to fender. Front and back would be helpful Thanks in advance
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///M3... Don't want more power, Just want it to turn sharper one step closer each time. -Ohlins TTX Raceline, PolePostions seats, Akrapovic EVO, ARC-8, 1/2 Cage, Seat Delete, Stoptech BBK, solid Subframe and diff bushing, spherical bearing on everything.
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08-26-2022, 05:17 PM | #105 |
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Ask Brett that - there was a specific window with 18" that it was all developed for - a common setup for track cars, lowered some.
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08-27-2022, 12:39 AM | #106 | |
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I found Brett suggestion online here on the forums he said "uprights are recommended for cars that are lowered by at least an inch (25mm)" post #4 on this thread. I assume this is from factory height, I'm right there with the recommendation. 26mm lower from what I could find online (610-600mm from bottom of rim lip to fender). It's been so long I had my car I don't have any stock height measurements saved.
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///M3... Don't want more power, Just want it to turn sharper one step closer each time. -Ohlins TTX Raceline, PolePostions seats, Akrapovic EVO, ARC-8, 1/2 Cage, Seat Delete, Stoptech BBK, solid Subframe and diff bushing, spherical bearing on everything.
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10-01-2022, 10:14 AM | #107 |
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Curious if anyone else has had luck dialing everything in with the Strom uprights? With my new Ohlins TTX-TS suspension setup (full thread coming on it) I have set my ride height way lower than I have done in the past and bump steer is pretty bad on the stock front arms. I'm now considering either Strom Uprights or SPL tie rods and lower control arms, already have the GAS monoballs and pretty happy with those but not adjustable. All of my arms are new so hate to ditch them so quick but the bump steer is pretty bad.
I did a corner balance after installing and driver is measuring 575mm, passenger 570mm, both bottom of rim lip to fender. Will likely try this on track since already corner balanced and aligned but looking for a better solution long term, thoughts appreciated!
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10-03-2022, 11:29 AM | #108 | |
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For bumpsteer you'd really just need the SPL tie rods as they are the only component that would change bump steer. The lower arms would contribute to roll center correction but shouldn't impact bump steer at all.
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10-11-2022, 10:20 PM | #109 |
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Any general updates on these from anyone?
I picked my car up from TCD yesterday and inquired about running 295 square and Joe mentioned Strom and it reminded of this thread. I'd like to run 295/30 square on my current suspension (Ohlins Dedicated Track) and not really looking to mess with removing the helper spring. Wondering if this would help in addition to the other advantages.
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10-12-2022, 10:08 AM | #110 | |
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