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It's a fast track, probably easier on the car than Laguna Seca, EXCEPT the temps at LS are WAY less outside. I've been wanting to go there too. Looks good, I can tell you were holding back, there is more room to lower those times!
I'll just leave this here


:)
 

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Discussion Starter · #62 ·
Don't feel bad, it's always good to review these and learn from them. I have been driving this week on the RE-71's and THEY are sticky on the road, 10x's more so than the PS4 tires! I can't wait to get them on the track. Your video makes me a bit worried they break hard when they give up, but in LS there are not too many turns like that. My big worry is turn 6 at LS which I have been taking at 70mph and I really want to hit it around 80, but if you lose it here, you are in big trouble.
 

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the tires don't break hard. They give tons of warning. If you are easing over the edge, you'll know it every time before you get in trouble. I could post up half a dozen moments of the tires breaking free and you wouldn't even tell in the video footage. A momentary fraction of a slip (or feels like it), slight lift on gas or less turn-in, car keeps trucking.

In the video, I can't see it now, but I "feel" like I remember the car getting upset by the rumble strip (normally totally fine to nail) and losing traction from the unweighting. The video is telling me otherwise though.... but seriously, the BW berms are nothing like the LS rumble strips. a smidge less consistent. Maybe that's bad memory though. I did take the entry speed too high and fought the car too much to stay on the chosen line. That's root cause for the goof :)

Now, if you take LS turn 2 at 120, yeah, they'd break free no warning! But I'm super glad to hear your impression is positive over the PS4's. The deal at tirerack is still going, so I bought 4 more just to sit on them even though I have probably 3 months left on this set at least. The deal is too good.

What I really like about LS is all the rumble strips are flat and drivable. you can put your wheels right up to the yellow sausages. The buttonwillow rumble strips are half berms, and the ones that are flat, 50% are oil slick and the other 50% are good to go. When I was watching BW tutorial videos and the guy is saying "you can run this one over, this one will upset the car, don't go more than half over this berm it's steep..." I'm thinking "I have to remember this stuff too now??" But on track, it's amazing how you could feel it. Even a flat but slippery strip, car gets squirmy, I think "welp, don't run over that one anymore..."

Did you ever get out to Speed Element? If I get those springs and swaybars, I was thinking of giving them a try as installers, Id like to know your impression of them, if they pass the smell test, or if it was just a 'get on the dyno and leave' feeling.
 

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Discussion Starter · #66 ·
the tires don't break hard. They give tons of warning. If you are easing over the edge, you'll know it every time before you get in trouble. I could post up half a dozen moments of the tires breaking free and you wouldn't even tell in the video footage. A momentary fraction of a slip (or feels like it), slight lift on gas or less turn-in, car keeps trucking.

In the video, I can't see it now, but I "feel" like I remember the car getting upset by the rumble strip (normally totally fine to nail) and losing traction from the unweighting. The video is telling me otherwise though.... but seriously, the BW berms are nothing like the LS rumble strips. a smidge less consistent. Maybe that's bad memory though. I did take the entry speed too high and fought the car too much to stay on the chosen line. That's root cause for the goof :)

Now, if you take LS turn 2 at 120, yeah, they'd break free no warning! But I'm super glad to hear your impression is positive over the PS4's. The deal at tirerack is still going, so I bought 4 more just to sit on them even though I have probably 3 months left on this set at least. The deal is too good.

What I really like about LS is all the rumble strips are flat and drivable. you can put your wheels right up to the yellow sausages. The buttonwillow rumble strips are half berms, and the ones that are flat, 50% are oil slick and the other 50% are good to go. When I was watching BW tutorial videos and the guy is saying "you can run this one over, this one will upset the car, don't go more than half over this berm it's steep..." I'm thinking "I have to remember this stuff too now??" But on track, it's amazing how you could feel it. Even a flat but slippery strip, car gets squirmy, I think "welp, don't run over that one anymore..."

Did you ever get out to Speed Element? If I get those springs and swaybars, I was thinking of giving them a try as installers, Id like to know your impression of them, if they pass the smell test, or if it was just a 'get on the dyno and leave' feeling.
Haven't been to Speed Element, I'm 100 miles away and don't want to take a day off work, spend 4 hours on the road to get out there. I have been working on weight shift as a performance issue, especially with turn 6 where you need to be on the gas on entry to shift the weight to the back, otherwise, you WILL get loose and fishtail.
 

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Funny. That is exactly what revelation I had on Buttonwillow on Sunday. Previous days, I couldn't feel that. Something clicked on Sunday and suddenly I could feel a massive increase in grip using throttle to shift weight off the front tire to the back one.

So I kept pushing it, right up to the breaking point with dusty results :)

What's seriously holding me back in skill is not having a good understanding of the braking points, how to gauge them and judge how I did on braking and entry. That is a MASSIVE lap time increaser since it affects everything, but most of all exit speed. It shows in Track Addict. The more challenging the corner, the more variability I see in the section times. I can now judge how hard a corner actually is based on that data variability.

Thinking about getting the 1-on-1 coaching at LS next time (now that we can have ridealong) just to get instant feedback on braking points. lead-follow just didn't do it for me. (but was great for driving the line)
 

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Jimbo, can you check the part number of the Sway Bar you ordered?

I called H&R, they confirmed their sway bar was tested on a 4matic car. Part Number is 71849-2 for the rear. Is that the part you originally ordered from Germany? Was it the PN for the replacement they sent you?

Got a vivid cart set up with the springs, sway bars, and I'll try the turbosmart mini recirc BoV just because, but I'm nervous to pull the trigger based on our previous discussion. P/N confirmation would help
 

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Discussion Starter · #69 ·

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Discussion Starter · #70 ·
I was told by H&R that the part number was an international number and it was correct, that is why I was told it is different than USA numbers, but the same part.
 

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This is what I bought, you will notice the fitment STILL shows it's for the GLA45, but it isn't.

On my computer, it doesn;t show as compatible with AMG?
 

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Discussion Starter · #73 · (Edited)
OMG, the RE-71R are NIGHT and Day, easily knocked 5 seconds off my lap times, but I kind of destroyed these new tires in one day. My best for the day was a 1:46 with a 1:43 theoretical lap time.


27033



This was my latest trip to Laguna Seca this weekend. You will notice in all the runs, I only got past ONCE all day and that was because I was held up in traffic by a Mazda, and the Mustang that passed me, once he passed, I was staying with him, and he was a pure race car. I was in the Mixed group A which required under 1:50 times.


BMW M3, BMW M2 Competition and Ferrari, my camera went out, but I eventually passed all 3.


My windshield got a rock at 3:52 and cracked in down by the bottom center, right in front of the hat-looking thing.


I took a Honda Civic TYPE R guy for a ride with me, his car was a track car. His language can be a bit colorful. The Mustang passes me late in this video.


 

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Great driving Jimbo! Gotta love AWD. Amazing how our little hyper hatches respond to mods too. Imagine if you ran E85 or even 100 octane. Couple questions...what kind of oil/engine/transmission temps are you seeing after 2-3 laps? Also what happened at the end of the 2nd video on the top of the corkscrew? Looked like a nasty off maybe. Saw dust and thought I saw coolant steaming up off the engine. Also were my eyes deceiving me or did I see a base model C class out there mixing it up? At first I thought it must have been a C63 sedan but I owned one of those and that car you passed didn't have the distinctive rear end or the wider front fenders.

EDIT: On 2nd glance, it WAS a C63. Just had so much exhaust and dust on the rear diffuser I couldn't see the quad tailpipes until about 12 minutes in. Wow he was feeling the heat and let you pass!
 

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27035
I’m thrilled the tires grip better. One less thing for me to worry about on my own setup. Unbelievable improvements in your lap time!

those tires have plenty of tread. I don’t drive near as well as you, but still have 3 track days on my 71R’s and are more worn and are still GTG.

that pic is 9 months daily driving and 3 track days of life.

I’m staring at your tire pic. Did you pick up an extreme amount of track boogers on the inside, or are you wearing the outside faster?
 

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Discussion Starter · #76 ·
The dust cloud was a Veloster N that rolled into the barrier, new car. I was running 100 octane. This time I only saw 235 on the oil temp peak all day. And yes that was a c63 AMG that I passed too.
View attachment 27035 I’m thrilled the tires grip better. One less thing for me to worry about on my own setup. Unbelievable improvements in your lap time!

those tires have plenty of tread. I don’t drive near as well as you, but still have 3 track days on my 71R’s and are more worn and are still GTG.

that pic is 9 months daily driving and 3 track days of life.

I’m staring at your tire pic. Did you pick up an extreme amount of track boogers on the inside, or are you wearing the outside faster?
The outside of my tire is my own melted rubber. The center tread of my right front is beveled down to the tread bars.
27036
 

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Discussion Starter · #78 · (Edited)
Yours don't look nearly as bad as mine after 3 sessions, I really pushed them the limit. I was running them 36 hot, but went to 38 hot and seemed to work better.
27043
27044
27045
 

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They even back out after driving on them daily :)

I’m of similar opinion about pressure. 31 cold for me put them about 37-38 hot.

what seemed to work nicely was running session 1 at 32 cold, then dropping the pressure by 1 psi and running that the remainder of the day. Gonna try that again next time to confirm it.

Got the approval from the Boss to hit Laguna Seca Sunday after Thanksgiving. Will sign up in the coming days :)
 

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It'd be awesome to see both of your cars out there together. Watching a pair of turbocharged backpacks carve up Laguna Seca would be like the equivalent of softporn in this forum.
 
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