GT350 vs. Z/28

[nametoshowothers]

Most synthetics do not break down at 270*F and I don't think any synthetic motor oil boils at even 300*F.

Some endurance racecars run at 300*F for hours on end. Personally I'd like to see 50*F less than that. Cool it down - yes, but I'd far from feel like its the end of the world.

Wrong

What happens at the end of an endurance race? You rebuild the engine, I do not think many owners want to do that every track day.

The reason I said wrong is that temperature is indeed the enemy of oil. Varnishing of the bearings is likely to occur, viscosity outside of design limits, etc. This is the way that you kill any oil lubricated system. Most industrial gearboxes, gas turbines, etc. limit oil temperature to 240F - and yes this is fancy synthetic stuff, etc. There is no way this engine will last at those temperatures irregardless of the oil type

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[thePill]

I glanced through the R&T article just enough to see mention of that 300° oil temp . . . which leaves kind of a sour taste. Wonder if/how that affected those Nurburgring times.


Norm

The lap times were 1:26ish and it heat soaked in 3 laps. So, they had decent viscosity for 4:30 minutes out of the 7:37... I'm thinking ambient temps were helpful.

Was the R&T car Air Conditioned? That makes a big difference.

Edit: The R&T z28 DID NOT have A/C. It was reported $75,000/$75,000 MSRP/As Tested.

DO NOT OPTION A/C.

 

[mustangletback]

The lap times were 1:26ish and it heat soaked in 3 laps. So, they had decent viscosity for 4:30 minutes out of the 7:37... I'm thinking ambient temps were helpful.

Was the R&T car Air Conditioned? That makes a big difference.

Edit: The R&T z28 DID NOT have A/C. It was reported $75,000/$75,000 MSRP/As Tested.

DO NOT OPTION A/C.

maybe this shows what has been known all of the time,that RING,time was made with a ringer car,when someone else drove it,the thing didnt last on the track because the oil got so hot so fast.:lol:the z28 like the zl1 is all hype,as you already know this.:lol:

 

[FATTBoss]

Thought this would get us back on track…

[ame]

[ame]

 

[thePill]

Hmmmm... The first video appears to have a Nitto'd Boss 302 (presumably an OEM version). Not only does he chase down a Boss 302S, both Boss Mustang's fly by a Black z28...

Second video... That sucks... I didn't think a Boss 302 would have kept a car, costing twice as much, in the windshield. Classic that he witnessed and video'd Zfat's 2014 z28 come off the road.

I think all the "it just sticks to the road" lends people miles of confidence. Was that the physical limit of the car? Because, there was a Boss 302 right behind ya'...

...not having a hard time at all...

Thank you FATTBoss for the video's... It's truly hard to beat the Boss...

 

[DHG1078]

I don't know, that first video looks like the camaro stopped racing at the corner both of the 302's flew past him. Whether that was to let them pass or he was looking for the exit (just a few corners away) I don't know.

 

[DHG1078]

in addition to what I just posted, these also look like HPDE open track days too. We have porsche, mustangs, and camaros all at the same time with no nets, no cages, and barely any safety gear. I am thinking there is a wide range in skill levels here.

 

[FATTBoss]

True enough. I think the point being made is that you can't just buy a new Z/28 and expect to be a track hero. I prove it time and again in my Boss when I pass Vettes, GT3s, and then get passed my self by a effing Miata!

 

[DHG1078]

True enough. I think the point being made is that you can't just buy a new Z/28 and expect to be a track hero. I prove it time and again in my Boss when I pass Vettes, GT3s, and then get passed my self by a effing Miata!

haha that I agree with 100000000000000%

 

[Fenderaddict2]

True enough. I think the point being made is that you can't just buy a new Z/28 and expect to be a track hero. I prove it time and again in my Boss when I pass Vettes, GT3s, and then get passed my self by a effing Miata!

Ha Ha, I can so relate.

 

[Norm Peterson]

These early videos can't be involving people with lots of Z/28 seat time yet, so I'd expect to see either surprises happen when people push it a bit too hard a bit too soon (like in video #1) or getting pointed by when driving it a bit conservatively as you might when trying to sneak up on the car's limit behavior (#2). My understanding is that Zfat wasn't at the top of his game that day, and I think the off cost him a couple of wheels.

Tires were comparable in video #1, though I don't know exactly which tires the Boss was running (http://www.svtperformance.com/forums/showthread.php?1018561-The-new-Z-28-vs-BOSS-302-On-Track).


Norm

 

[FATTBoss]

I think all these videos prove is that lap times on a track should never be taken as gospel, or proof that x can beat y. There are far too many variables in track driving to prove out that x is indeed faster than y.

In pure accel numbers, that is pretty easy for most to duplicate or better. Track driving is way more complicated. The design of the circuit could favor small light cars, or big HP cars. The driver may not be very experienced, or if he is, maybe he reminds himself before getting to the turn that he owes money on this car, and his insurance might not like it if he wadded it up (that would be me). I have tons of on track experience. I have done it for 16 years, and instructed for the last 9, with 6 as a professional paid instructor. Even with that, I get "beat" by "lessor" machinery time and again because I either don't want to push very hard, or the other guy is just plain better.

When someone brags about how could their car is, my response is always, "How good are you?"

 

[thePill]

That poor guy just sank $80,000 into a track day car, got tailed by a Boss and said Boss, being behind him, actually pressured that mistake.

"I'm passing the Boss"
"I can't get away"
"I've reached my (or my cars) limits"
"I'm mowing the lawn"

Once 4200lbs comes around on ya', you'll need more than boxed 305's, Carbon Ceramic brakes and crazy F1 shocks.

The Boss driver gets a free "Camaro5's Most Wanted-the Pill" T-Shirt for his efforts. Classic it just so happened to be that perticular guy, in that perticular situation at that perticular time. I'll have something clever to photoshop for sure.

 

[Trackaholic]

I had a very similar experience at that same location on track @ THill. A BMW M3 (E46 I believe) was in front of me and lost it at the exit of Turn 2. However, instead of sliding off to the inside of 2 like the Camaro, he over corrected, fishtailed a couple times, then went off on the inside of Turn 3. Luckily he had scrubbed off quite a bit of speed through the fishtails, and I think no damage was incurred.

Hopefully that Camaro ended up OK as well. At that point on the track I think I'm typically going about 75 MPH, so that's a pretty high speed to be going off like that.

-T

 

[thePill]

The tires are junk, I heard some wheel damage. I would probably check the MacP system, steering in general, tie rods for sure, the rear should be looked at as well.

I think he said the wheel actually came off. Suspension damage for sure if true. If it's yanked that bad, I'd check the strut towers and mounting points. That's a lot of weight and lateral force on suspension. MacP systems hate that, IRS in general, most of that force is scrubbed.

It's definitely a changed car if wheels were ripped off.

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