SCCA CAM-C Thread

[mavisky]

Yeah, and DSC's tech support is less than stellar. A friend won XS in Lincoln this year, and has a DSC on his 911. The DSC failed just prior to the event, he was able to get it working again, and then it failed after the event, and still doesn't work, at least last time we talked.

If DSC isn't going to help a national champ, can't hold out hope they will help drivers-in-training such as myself. So maybe in that sense, Steeda has a bit more sway and can get stuff addressed faster/better.

That's what I'm hoping on, but you can rest assured that I'll be traveling to every event with a 13mm wrench and the factory VDM in the travel kit just in case.

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[webspoke]

DSC Sport - I've had a good experience with mine, hope its not the outlier. Installed over a year ago. Over 400 laps and 12 hours of track time. I've seen less than 5 suspension mode errors, usually when driving home from the track. I did carry the oem controller as a spare to big events like time trial nationals. Support was good for me, as the owner was tuning his personal gt500 with it. That Billy Johnson calibration is my base, and worked fine from stock springs, bmr and steeda with minimal changes.

I reflash it frequently for tuning, the adjustability is similar to a 3-way or 4-way damper. Hi & low speed compression and rebound. I used it to alter the damping balance front to rear, across the board (velocity table). Dynamic changes seem harder to feel (like softening the rear on acceleration in the G-table) so I have not used it much.

 

[NightmareMoon]

Local autox club rented a nearby road course and did a “Track Sprint” event today. Autocross stsrt and finish on a road course, and no extra cones. Basically a short (~70 sec) point to point time trial. Basically if you custom designed an event for my car, this would be it. Cool and damp conditions were quite acceptable for the Yokohama tire..

Pretty fun. CAM aero really helps at track speeds. I was 2nd fastest raw time after a decently fast high horsepower time trial Supra. I won top “pax” which means nothing because this was /not/ an autocross. Rain late in the event effectively neutralized all of the fast R tire cars in the 3rd heat.

Somehow I dont feel the slightest bit guilty.

 

[mavisky]

I keep trying to convince the guys at Atlanta Motorsports Park to replace their 1st gear only super tight autocross event with something similar using their course with a cone or two on any of the faster parts.

 

[WItoTX]

What speeds were you seeing out there? They used to run similar events here at MSR south of Houston, but this whole last year there was none.

I saw that event pop up too late and couldn't swing it, but it looked like a riot.

 

[NightmareMoon]

What speeds were you seeing out there? They used to run similar events here at MSR south of Houston, but this whole last year there was none.

I saw that event pop up too late and couldn't swing it, but it looked like a riot.

~114 on the back straight. over 100 in a couple other spots too. Its not the fastest track w/r/t the straights.

 

[kz]

Mach 1 knuckle that Steeda is selling in a kit with the hub - what are everyone's thoughts about it ?

I remember someone here on the forum compared knuckle geometries between different models (GT350 and GT500 for sure) but don't remember where.

 

[WItoTX]

Funny, I planned to look at that same thread you mention, and compare it to Steeda's later today.

Knuckle Comparison

 

[TeeLew]

Any specifics? That thread mentioned the difference in caster trail, which is relatively apparent just by looking at the casting, but that is not going to change the world. You might feel a little difference in the wheel, but that alone will not change the actual handling of the car.

I'd like to have the AL upright for weight, but if it were just a caster trail change, then it's a hell of a lot of work for not much difference. It certainly isn't going to redefine the car in terms of handling. If there are other aspects of the geometry change, then it might be a good deal, but caster trail alone is pretty, "meh."

 

[mavisky]

Funny, I planned to look at that same thread you mention, and compare it to Steeda's later today.

Knuckle Comparison

Interesting as they specifically talk about the side-deflection causing wheel speed reading errors that turns the stabilitrac on mid-run which I've experienced.

The problem is that the brakes won't mount to these uprights for us GT350/GT500 owners, only GT, Bullit, Ecoboost, and Mach 1 owners.

 

[webspoke]

Between my '18 350 and the 500, tramlining was reduced by about 75% with similar offsets and alignments, and the 500 required much less trail braking to dive into corners. Some of that may be due to abs calibration refinements also, which the 2019/2020 cars got.

 

[kz]

The problem is that the brakes won't mount to these uprights for us GT350/GT500 owners, only GT, Bullit, Ecoboost, and Mach 1 owners.

You can mount our GT calipers which enables you to use 18 inch wheels if you'd like. Profit. ;-)

(It'd probably mess up transmission gearing on Tremec with how short 315/30R18 tire is).

 

[WItoTX]

Between my '18 350 and the 500, tramlining was reduced by about 75% with similar offsets and alignments, and the 500 required much less trail braking to dive into corners. Some of that may be due to abs calibration refinements also, which the 2019/2020 cars got.

IIRC, the 19/20 cars had different spring rates as well. IMO, the 19/20 cars are sort of a Gen II/mid model refresh of the GT350. But with substantive changes, not just cosmetic.

 

[kz]

I've watched Steeda's video - looks like they might be onto something with "Service Advancetrac" message which made me pull the plug basically permanently in my car.

 

[WItoTX]

I've watched Steeda's video - looks like they might be onto something with "Service Advancetrac" message which made me pull the plug basically permanently in my car.

I have to admit, I've never heard the knuckle to be the cause of the advancetrac re-engaging. It's usually a failed sensor, bad wheel bearing, or an aged battery that I have seen it happen.

This is a very interesting hypothesis from Steeda, and listening to their video, I think they just sort of declared it, not that they scientifically proved that it was the knuckle causing the issue.

I may be way off base, but I think the computers on the car in a base GT vs a GT500 manage wheel slip significantly different, and even with all the nannies turned off, the base GT is going to re-engage more quickly than a GT500.

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