Very Cool!!!! Thanks guys! Porsche has me on the power it seems. I'm 348 whp. I may go to boosted someday so I can hang with the big boys. I'm out there again this weekend (26th). Hope to see you there.

Frustrating day at Sebring yesterday. Consistently hitting 2:32 over and over and over, but can’t get faster for one reason: “ice mode”. Put me four wheels off twice and almost caused me to rear-end two cars. That shook my confidence in my brakes, which obviously puts a major hurt on lap times. I need to get this issue resolved, or I’ll have to start looking for a different car (not a 370 of course), which would be a shame. I do love the car other than this issue. I have read a lot of threads on this forum where people identify the ice mode issue, but I’ve not read about viable solutions. It’s not a heat issue - it’s an ABS issue. And a full racing ABS will be north of $8K. I called the guys at Z1 and they just talked about heat. Any advice would be appreciated. I’ll try anything. Thanks guys!

Change your braking technic. The way you apply the brakes. Instead of smashing the brake pedal down quickly. Slow up your applied pressure some.

Thanks Rusty. I’ll try it.

Chin

Yeah I’ve never hit ice mode on with my Z, and I’ve all four rotors smoking when coming off the track. I would suggest try what Rusty said and see if that helps, or contact SS firehawk. He is hard on the brakes as well and he ran a 2:30 around Sebring.

I was thinking overnight: The ice mode issue has gotten much worse since I put in my Nismo Pro Diff set for 2way. I’m wonder if that’s contributing to my issue since it changes lockup dynamics on decelerations. Luckily it’s adjustable to 1.5 way, and it may be worth changing. Any thoughts? Thanks.

My OS Giken is set to 1.5 way with about 80% lock.

Does anyone in the St. Pete., Tampa or Sarasota Bradenton area have a 370z knowledgable mechanic they can recommend. I purchased a 370z road race
project that needs a fair bit of finishing work. I need someone to thoroughly
go through the car and tell me what shape it is mechanically. I can't seem to
find anyone in the Sarasota Bradenton area. Any suggestion is appreciated.

Going to be out there in March shooting for sub 2:30’s

Same here. I’ll be at Sebring on March 29th.

End of May?

Elmo and I will be out end of May. For your brake issues, What's your pad/tire combo and when you press the brakes are you stabbing them or rolling in the pressure (quickly, but not suddenly)? I know that ice mode occurs on a brake tire mismatch and when you shock the ABS. If the initial bite is too aggressive, try a Japanese pad. It sounds dumb, but Japanese pads don't tend to bite as hard initially, but the stopping power and consistency is there. Elmo and I have run Winmax W5's with a lot of success.

This weekend
 

I’ll be at Sebring both days this weekend. Bringing rain tires! Hope to see you guys there.

I could just watch...Ima chicken to fast cars!

Good seeing you again. Both me and eddie ended up with a low 2:32 on our last session. To make you feel better I was talking with the challenge cars and they usually run 2:07-2:08’s and today there couldn’t get under 2:13

Would someone add me to their guest list the next time you head out to a Chin TD at Sebring please?

I emailed them after reading no outside spectators are allowed and they confirmed only invited guests.

Good to see you guys out there, and thanks again for the advice. I stayed right at 2:32 for two full days. Analyzing my data this week after work. Consistent, but not happy with overall lap time. I’m still babying the brakes due to close calls with disaster lately. But getting new ST Trophy kit put in tomorrow, and will definitely be able to shorten braking next time I’m out. I’m back out later this month with NASA.

Fastest I clock you in was a low 2:31. I had trouble trusting the brakes as well. My last session I just push the brakes down harder and it seems to bypass the abs kicking in. Upset I didn’t do that earlier in the day

Well we learned some interesting things about the car. The ducting ssfirehawk made out of cardboard and duct tape, worked a little to good lol. It has massive amounts of air flowing into the engine bay and underneath the car. Downside not enough venting to get the air out, under braking into high speed corner the rear end would get very light and start to move around and you visibly see the hood shaking and hear the undertray scraping lol. Almost the car still seems to run happy at 270 degree oil temps, would of loved to logged at the oil temps, with pulling power when oil temps reached 280. This is in 90 plus degree heat with humidity ranging from 60-90%. Hopefully we can take this information and make some
Improvement to reach out sub 2:30 goal on street tires.

I don't think Eddie's car is on coilovers but if so soften the dampening or get softer springs since the track is so bumpy. I sounds like you have excellent grip up front. It may be time for a rear wind.

I love that Fugi hood, but that was why I sold it to Eddie. I was driving faster and the hood wasn't moving enough air. So I started talking to #trackspec to develop the hood vents for the Z. There is a real cost to getting faster! LMAO

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I have the trackspec center hood vent In my OEM hood, and I feel like it lets enough air And heat escape. Hard to be sure. I softened my dampening as well to help with the Sebring bumps. Seemed to help a little with the ABS.

Yeah 2:31 was my best. I think by biggest issue is the driver mod. Absolutely no reason I should be at 2:31 on slicks and aero. I ran that speed before all the mods. Frustrating. I did notice the impact of the heat and humidity. Car was panting. But hey, that’s why there’s next time! Back out there in a few weeks on my new brake setup. Hope to see you guys out there again soon.

Good point on driver mod! Been reading and watching videos on trail braking and braking in general. A big factor in trail braking is to ease in to the braking by applying firm but smooth pedal and then gradually release the pedal. Braking hard into a corner and then releasing the pressure quickly will upset the car especially at speed. The sayings are smooth in smooth out or smooth is fast and fast is smooth. The brake and gas pedals are not on off switches!

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The Stomp Method isn't the fastest way of doing things. Stomping on the gas or brakes will get you into trouble. :driving:

Agree. I mumble “smooth is fast” under my breath while on track all the time, but heavy breaking doesn’t alway mean it’s not smooth. I’m working on my EOB (end of braking) timing. Ross Bentley has a lot of good videos on the subject. He suggests focusing on EOB as much if not more than beginning of braking. Takes trail braking to the next level mentally.

Agreed! Heavy or threshold braking does not equal stomping or standing on the brake. Threshold brake can be done smoothly and quickly. Ross Bentley's stuff is spot on! EOB is the stuff that make you faster.

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Looked back on eddies 2:30, he was carry 5-8 mph more in turn 1. I tired that day and the rear came around, I was like nope, I don’t like drifting

What was noticeable on the video of your runs together was that the faster car was breaking earlier and therefore able to carry more speed through the turn. Slow in fast out. Get most of your braking done early and slowly bleed off the brake into corner entry and then on the throttle at the apex.

Nope, faster in faster out. Just more grip in the fall then in summer. Ferrari challenge cups with professional drivers were 6-8. Seconds off pace.

LMAO, You are simply talking better tires and brakes obviously they know the principals as they are the ones that have taught and teach it!

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I sat in the trailer and spoke with both drivers. They usually run 2:07’s they couldn’t even touch 2:12’s that day even on stickers

I ended semi knowing the crew chief memeber

Yep has to do with track conditions and weather!

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Might be headed to robeling road first weekend in August

That’s awesome. On my bucket list.

Yeah looks like a fun track, if not we will be at Sebring on the 8th. Might try to run those challenge car slicks.

I’m signed up for the 8th. Hope to see you there.

We are signed up. I tried to source a spare set of rims to run these pirelli p zero non dot slicks. I think we could go deep into the 20’s

Moving forward with MK60 ABS with custom mapping. Thanks for the tip! Will have it installed in next 8weeks. In time for Daytona.