SCCA Solo D Street discussion

[Desertnate]

Originally Posted by DocWalt

The TCS is *super* intrusive and will kill you on every corner exit. Delays throttle application for a half second or so after wheelspin finally stops or a slide is straightened out.

Good to know, I'll kill it next event...assuming it will be warmer.

I'm sure I probably didn't notice it much this time between being new to the platform and having so little grip due to the cold. Who knows, it might have kept me a little more straight than I realized.

[foshjowler]

Is there an answer for shocks on the 2022 cars? Of course, there's always Koni's, but I'm hoping for something nicer than those. I'm of the belief those are meh at best.

The only other option I've come across are the Vorshlag MCS TT1 and TT2, which aren't out of the question, but are rather spendy. I'm familiar with Vorshlag from having their camber plates on the Camaro, they are very nice pieces, and at least one person had their coilovers for their Camaro and they seemed very happy with them. I'd prefer to spend less on just shocks, especially if the car is going to be competitive in an ST class in the coming years.

[DocWalt]

Nobody has legal rear spring perches yet (but MCS is close and Koni is working on it) so don't spend your money yet.

I'd just run the stock shocks in DS as they're actually valved very well and then upgrade to coilovers down the road for ST prep. There are no shocks that will work for both classes without some serious compromises for at least one of the classes. The packaging of the suspension on the twins kinda blows.

I'd also personally not give Vorshlag a cent, buy the MCS from Karcepts if you do MCS. He has badass camber plates/tophats with way larger sphericals to handle the abuse of being loaded with the spring force up front.

[MacSpeed]

Originally Posted by DocWalt

Nobody has legal rear spring perches yet (but MCS is close and Koni is working on it) so don't spend your money yet.

I'd just run the stock shocks in DS as they're actually valved very well and then upgrade to coilovers down the road for ST prep. There are no shocks that will work for both classes without some serious compromises for at least one of the classes. The packaging of the suspension on the twins kinda blows.

I'd also personally not give Vorshlag a cent, buy the MCS from Karcepts if you do MCS. He has badass camber plates/tophats with way larger sphericals to handle the abuse of being loaded with the spring force up front.

I've never really heard anything bad on Vorschlag, care to elaborate?

Karwins stuff is amazing though, I've had a couple of his sway bars now including on this car. The time and precision he puts in is all or nothing.

[DocWalt]

Originally Posted by MacSpeed

I've never really heard anything bad on Vorschlag, care to elaborate?

Karwins stuff is amazing though, I've had a couple of his sway bars now including on this car. The time and precision he puts in is all or nothing.

Vorshlag makes quality components but they've screwed close friends of mine and Terry Fair's horrible attitude towards seemingly random things infects their entire shop and they're generally really annoying to deal with unless you're a friend of theirs.

[foshjowler]

Originally Posted by DocWalt

Nobody has legal rear spring perches yet (but MCS is close and Koni is working on it) so don't spend your money yet.

I'd just run the stock shocks in DS as they're actually valved very well and then upgrade to coilovers down the road for ST prep. There are no shocks that will work for both classes without some serious compromises for at least one of the classes. The packaging of the suspension on the twins kinda blows.

I'd also personally not give Vorshlag a cent, buy the MCS from Karcepts if you do MCS. He has badass camber plates/tophats with way larger sphericals to handle the abuse of being loaded with the spring force up front.

Good to know on the spring perches. I'm not close to purchasing anything yet. Need to sell some stuff from the last car and catch up on my finances after a couple of months of feeling rather spendy.

I wasn't planning on trying to do a dual duty street to ST prep. It would be a totally different shock/coilover purchase, and sell the street ones should I go to ST. Maybe something like Ohlins once I get there, so I can say I own Ohlins lol.

I'm not opposed to purchasing something from another vendor, I'm just familiar with Vorshlag. Still got lots to learn about this car. Plan is to take it slow though and make sure I get the correct thing the first time. Buy once, cry once and all.

[bholliday]

Are 245/40ZR17 tires considered the optimum size in D-street for the 2022? I ran 225/45ZR17 Bridgestone RE71's on my 2018 BRZ and my 2015 BRZ. Back in 2015 it seemed like the consensus was that 245's were too wide. Does the 7.5" wheel make that much difference?

I'm dating myself, but back in the early 2000's, you could stuff wide Hoosier tires on narrow stock class wheels, but I was under the impression that 200TW tires do not like to be pinched.

Opinions?

[foshjowler]

Originally Posted by bholliday

Are 245/40ZR17 tires considered the optimum size in D-street for the 2022? I ran 225/45ZR17 Bridgestone RE71's on my 2018 BRZ and my 2015 BRZ. Back in 2015 it seemed like the consensus was that 245's were too wide. Does the 7.5" wheel make that much difference?

I'm dating myself, but back in the early 2000's, you could stuff wide Hoosier tires on narrow stock class wheels, but I was under the impression that 200TW tires do not like to be pinched.

Opinions?

You can squeeze 245 Yoks on a 7.5" wheel, but I'm really not sure if there's much benefit over a 225 or 235. I went with 225 RT660s on mine.

[cmiovino]

I went with 225/45/17 RT660's. II ran the same size Yoks last year and can confirm the 660's a hair wider, at least in terms of actual sectional width on a 7.5" wheel.

As far as going to 245, in 90%+ of cases, wider tires means you go faster, at least at autocross. A slight issue is added weight and that weight being at the outside of the wheel/tire setup - so it's not all upside.

I'd also say 'feel' comes to play and if you're not confident in the car or can't feel things, you dial it back more than you should and lose major time that way.

Given the car is lightweight and down on power as is, eh, it's a toss up, but people have success on 225. Hell, look at SSC on 8" running 225 RT660's... they're super quick in our region at least.

[Desertnate]

I'm glad this tire discussion came up. I'm running 100% stock on the PS4's this season, but for next season I was looking at a dedicated set of wheels/tires in order to run A/S tires on the OEM wheels for better all weather drivability of the car.

I'd like to go to a 17x8 wheel to get a slightly wider footprint, but that would push me into STR where I'd be eaten alive by school of moded Miata's. I have no intentions to mod my car far enough to be competitive in that crowd. This puts me back to a 17x7.5 wheel, but I was uncertain of the tire size.

It's good to hear 225 works well on a 7.5 wheel. I'd forgotten SCC uses that same width on their 8" wheels. My though is I'll run 615's until I'm familiar with the car and then move to something more sticky. Since I have a 45 minute drive to most local events, a good track is hours away as are good backroads, I'm liking the idea of a tire that wears a little longer and isn't so track focused.

[Autoxer62]

I'm pretty sure Daddio was on 225s this weekend, I looked at which tire (660s). I can say they sure didn't look like a 245 pinched onto a 7.5. He seemed to do ok

[otter]

My codriver and I have done a handful of events in the car now, both on 225s and 245s, and generally are struggling with the car wanting to push in corners and I'm not really sure what to do about it. I've got the crash bolts up front. Currently, rear toe is stock, are people zeroing out the toe in the rear for rotation or leaving it toed in?

I'm waiting on Konis after a debacle with Tire Rack sending me used struts twice, now waiting on a drop ship direct from Koni via Strano and the right side is on backorder. Been on the Karcepts front bar waiting list since early January. I'm feeling a bit stuck and frustrated.

[DocWalt]

What front bar do you have?

Rear shocks are needed a lot more than front shocks, IMO... but spring perches are an issue. There's a guy on the FB groups selling some CNC'd rear perches to use Koni rears so you can crank up the rear rebound.

Karcepts has some swaybar parts in stock and is building them out as he can, I got mine recently.

[cmiovino]

Originally Posted by Autoxer62

I'm pretty sure Daddio was on 225s this weekend, I looked at which tire (660s). I can say they sure didn't look like a 245 pinched onto a 7.5. He seemed to do ok

Pretty sure half our region was there too

The general consensus from the locals here is to cram the largest tire onto the wheel as humanly possible no matter what. Kinda glad there's some offsetting evidence of this.