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-   -   Lapping a 3.7L vs 6.2L (http://www.the370z.com/other-vehicles/130753-lapping-3-7l-vs-6-2l.html)

osbornsm 05-08-2019 02:14 PM

Lapping a 3.7L vs 6.2L
 
Had my 2nd track day withe the Camaro ('18 SS 1LE).
- Comparing 2 different cars on the same track with the same driver gives the following results:

370z lap time: 2:52.65
Camaro lap time: 2:50.62
Z06 vette lap time: 2:42.xx (friend's time for comparison)

So let's see here, i have:
+120 hp
+180 ft/lbs
+best rear diff ever

And i only shaved 2 seconds off the 370z time over a 3.56 mile road course. Perhaps there are some gains to be had with additional #drivermod.

The camaro could be tracked from the factory.
I spent $8,000 making the Z trackable.

Draw thine own conclusions.

:driving:

UNKNOWN_370 05-08-2019 02:30 PM

There still remains a lot of driver factors not brought into this equation. The equipment is 50% of the race.
I got in a Z and mastered it in a month. The camaro being so wide... You have to be Carmack the great to see some corners. So it took me about 6 months to understand my front end. And on track you're fighting against torque in the camaro if you're not good at modulating power. It will be easy to over accelerate in corners if you don't get practice. The Z was easy from day one. Torque isn't challenging at all in a Z. There's no real skill needed on the pedal... But the Z is more front heavy than the camaro which can make it sloppy coming out a turn. But say... If you have a seasoned camaro driver? These handicaps can be easily overcome. It just takes more time to master a camaro powerband characteristics.

osbornsm 05-08-2019 03:19 PM

Very true... there's a lot of learnin' to be done with the Extra torque.

The Nissan kinda just accepted whatever throttle inputs.
The Camaro can blow the tires off whenever i want, lol.

ZCanadian 05-08-2019 03:35 PM

It's going to depend a lot on the nature of the track. Curvy, technical circuit vs lots of straights. No doubt that horsepower can make even a mediocre driver look good whereas it takes a lot of finesse to extract the best times from a lower HP (and low torque) car (not saying bad of you, just that I've seen Miatas lap 911's on track before - you know what I mean).

I guess a cost comparison between the two (including the purchase prices, and mods on the Z) might be in order.

Also, the running costs. Not really going to be able to tell without a year or more's worth of data on each car. But IMHO, I'd leave 2 seconds on the table when it is only open lapping / HPDE if it meant I could do it at a considerably lower cost. 2 seconds is nothing that better driving cannot pick up (unless you are already Lewis Hamilton, in which case, glad to make your acquaintance). And the satisfaction is greater from a well-driven lap vs a well purchased car. Obviously, both would be even better.

Curious how this comparison would play out, though.

I track the 4C and will get 1,000 Km of track time out of a set of semi-slicks (that's good) and probably 2-1/2 to 3x that in front brakes. The rear brakes are just for decoration on that car and I don't expect to ever have to change the pads LOL. I can run 120Km on the track for less than $60 in fuel (and our gas is about US$4.20 per gallon for premium here) whereas my 911 and C7 buddies run nearly 2x that much. Haven't needed to rebuild callipers or replace rotors yet in 4 years. So far, no indication as to the cost of more extensive replacements (the dual clutch won't be cheap).

I know some people who have tracked a Giulia Q, and they report that it's easy to drive off a brand new set of tires and brakes in one day!!! HP + weight - can be both friend and foe. Would be very informative to know how the Camaro (and Corvette) fare.

There are C7's which blow my doors off, but they also end the session early or shorten their day because they don't want to overheat the car, overuse the brakes, or replace those wide-*** tires (his fronts are bigger than my rears!) too soon. To each their own, but I cannot help but think that I'm having more fun than they are!

DrBacon 05-08-2019 07:15 PM

I'd be curious to know if you spent the difference on the Z as to how much the camaro cost would it lap around the same? Assuming your Z was around 32k + 8k to make it "trackable" (what the hell does that even mean?) and the camaro was 50k, would 10k in mods give you the two additional seconds?

osbornsm 05-09-2019 08:32 AM

Quote:

Originally Posted by DrBacon (Post 3850733)
I'd be curious to know if you spent the difference on the Z as to how much the camaro cost would it lap around the same? Assuming your Z was around 32k + 8k to make it "trackable" (what the hell does that even mean?) and the camaro was 50k, would 10k in mods give you the two additional seconds?

Make the Z trackable means, add:
  • Track wheels
  • Track Tires
  • Track Brakes
  • Racing Brake fluid
  • Upgraded shocks
  • Upgraded sway bar
  • Brake Ducting

Cyber370 05-09-2019 08:38 AM

Lapping a 3.7L vs 6.2L
 
A factory stock Nismo would do pretty good.


Sent from my iPhone using Tapatalk

osbornsm 05-09-2019 10:07 AM

Ask Car and Driver how the OEM brakes are.

Article Link

ZCanadian 05-09-2019 11:34 AM

Quote:

Originally Posted by osbornsm (Post 3850909)
Make the Z trackable means, add:
  • Track wheels
  • Track Tires
  • Track Brakes
  • Racing Brake fluid
  • Upgraded shocks
  • Upgraded sway bar
  • Brake Ducting

Quote:

Originally Posted by osbornsm (Post 3850940)
Ask Car and Driver how the OEM brakes are.

Article Link

I wouldn't seriously track any car with stock (street) brake pads. They are spec'ed with dust and noise in mind, not fade resistance. They are meant for city traffic, and need to work at -20 degrees. In traffic, these seldom get up to the kind of temperatures that track pads need in order to start working. These are life safety devices - even moreso on the racetrack.

Even performance pads come in many, many different flavours - for auto-cross and light lapping days, sprint, full on race, and even endurance. These are not one-size-fits-all, and very few overlap well with regular street use. Especially if you don't like squeal, or cleaning your front wheels every day. And if you like to consistently make that stop sign at the end of your street on cool mornings!

Cannot fathom how Car and Driver wouldn't figure this out. As the manufacturer, I'd just shrug my shoulders as well, and hand them the bill!

ZCanadian 05-09-2019 01:45 PM

Anyway, you gonna treat us to some video / pix of your latest tracking experience, or what???
:-)

Hotrodz 05-09-2019 03:45 PM

It quits being about the car at some point and all about the driver. I see 220whp S2ks blow the doors off Camaros, Mustangs and Corvettes. The track has a lot of influence over outcomes as well. Momentum tracks are equalizers for lower horsepower cars. I have seen Eagle blow the doors off said Camaros and run with 1le ZL1s. Driver mod rules. I have a video of me at Buttonwillow Raceway which is a fairly high speed track in my Miata continually running down a guy in an SS Camaro. He would blow my doors off down the straight aways and in no less than two corners I would catch him. Driver mod rules!!!

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Rusty 05-09-2019 04:33 PM

It's more fun to drive a slow car fast, then it is to drive a fast car slow.:driving:

Rusty 05-09-2019 04:34 PM

Think I'll stay sub'd for awhile and beat someone'e balls with a cast iron frying pan. :tup:

Spooler 05-09-2019 07:49 PM

Quote:

Originally Posted by ZCanadian (Post 3850983)
I wouldn't seriously track any car with stock (street) brake pads. They are spec'ed with dust and noise in mind, not fade resistance. They are meant for city traffic, and need to work at -20 degrees. In traffic, these seldom get up to the kind of temperatures that track pads need in order to start working. These are life safety devices - even moreso on the racetrack.

Even performance pads come in many, many different flavours - for auto-cross and light lapping days, sprint, full on race, and even endurance. These are not one-size-fits-all, and very few overlap well with regular street use. Especially if you don't like squeal, or cleaning your front wheels every day. And if you like to consistently make that stop sign at the end of your street on cool mornings!

Cannot fathom how Car and Driver wouldn't figure this out. As the manufacturer, I'd just shrug my shoulders as well, and hand them the bill!


I run on Carbotech XP8's year around. No issues. Don't think you know much about running race pads on the streets. The end of your street is not an issue. The problem comes when doing interstate driving in a cold rain. That is when you need to tap the brakes every now and then to keep heat in the pads/rotors. I have done it for years. Who cares about brake dust. I prefer to stop. Loose your brakes in the triple digits once and you will make adjustments to your opinion.

Rusty 05-09-2019 08:02 PM

I'm running the 10/8 XP all the time. :driving:

ZCanadian 05-09-2019 08:13 PM

Quote:

Originally Posted by Spooler (Post 3851102)
I run on Carbotech XP8's year around. No issues. Don't think you know much about running race pads on the streets. The end of your street is not an issue. The problem comes when doing interstate driving in a cold rain. That is when you need to tap the brakes every now and then to keep heat in the pads/rotors. I have done it for years. Who cares about brake dust. I prefer to stop. Loose your brakes in the triple digits once and you will make adjustments to your opinion.

The end of my street is a 45MPH dead stop after almost 3 miles.. Next braking is another 3 miles and is a high speed right followed by esses (i LOVE my commute!).

My opinion is that street pads are for street cars - you don’t have to mess with keeping brakes warm, and you’re not going to get fade in normal road driving. Triple digits? Mph? Not on any street that I know of. That’s instant impoundment and roadside license suspension where I live, even on the fastest highways.

I ran Ferodo DS2500 on track cars on the street, and PFC-01. Spring to autumn. Both brands squealed. One set of 2500’s was really bad. None had particularly useful cold bite. It’s noticeable. On track, I need a lap or two to get them and tires to really bite. If you haven’t done it, you wouldn’t understand. And neither of these are considered true dedicated track pads. I used Hawk HPS on another car, and they were basically hyped up street pads. None of these are particularly dusty. HP+ can be terrible in that regard, as are some others.

Spooler 05-09-2019 09:38 PM

Quote:

Originally Posted by ZCanadian (Post 3851119)
The end of my street is a 45MPH dead stop after almost 3 miles.. Next braking is another 3 miles and is a high speed right followed by esses (i LOVE my commute!).

My opinion is that street pads are for street cars - you don’t have to mess with keeping brakes warm, and you’re not going to get fade in normal road driving. Triple digits? Mph? Not on any street that I know of. That’s instant impoundment and roadside license suspension where I live, even on the fastest highways.

I ran Ferodo DS2500 on track cars on the street, and PFC-01. Spring to autumn. Both brands squealed. One set of 2500’s was really bad. None had particularly useful cold bite. It’s noticeable. On track, I need a lap or two to get them and tires to really bite. If you haven’t done it, you wouldn’t understand. And neither of these are considered true dedicated track pads. I used Hawk HPS on another car, and they were basically hyped up street pads. None of these are particularly dusty. HP+ can be terrible in that regard, as are some others.

I never said I was on the street when I lost my brakes in the triple digits.

osbornsm 05-15-2019 09:55 AM

Quote:

Originally Posted by ZCanadian (Post 3851025)
Anyway, you gonna treat us to some video / pix of your latest tracking experience, or what???
:-)

Knew i forgot something!!!!
Which video setup do you like better??

Each video is my hottest lap from my 1st and 2nd events.

Setup #1
http://www.youtube.com/watch?v=Xwkz_no1P20

================================================== ========

Setup #2
http://www.youtube.com/watch?v=hQKnCJPsRIk

ZCanadian 05-15-2019 12:08 PM

Good driving. I think there are still some seconds in there, too.

By "setup", do you just mean the camera location and screen overlays, or is the car set up differently between these?

Assuming it's the presentation you are referring to, I like them both. Always a fan of POV racing videos, but the outside perspective is different in a good way. It also lets you review your steering inputs (which are nice and smooth btw). It does attract the following unsolicited advice, though (the danger of posting any video online - ignore or take onboard as you wish). I think your steering wheel is too far from your seat back. Or your arms are too short :-). I like your 9 and 3 grip - very well done - but when you turn to near 12 O'Clock, your arm is too straight and I think you might be reaching your shoulders forward at that. Try positioning your wheel and seat so that with your hips and shoulders pressed against the seat back, you can put your arms on the 12O'Clock position with YOUR WRISTS resting on the wheel (don't take your shoulders off the backrest). This will make it easier on your body to stay still and braced in the corners. If you can plant your feet on the dead pedal or firewall behind clutch and behind the brake with a slightly bent knee, then the seat is the right distance back so adjust the wheel towards you or make the backrest more vertical. A stable, more comfortable driver is a faster driver!

JARblue 05-15-2019 12:12 PM

I like the POV but the side camera has better quality without a windshield in front of it. I'd try the POV centered on the hood or roof.

2011 Nismo#91 05-15-2019 12:43 PM

The best locations for exterior cameras for me is on the sides so I can see just where the tires are exactly. High up top is pretty good too as long as the angle is wide enough. For cool looking shots, any low mounting position is great.

osbornsm 05-15-2019 03:36 PM

I'll have to experiment with different Gopro locations.

I try to keep the Gopro suctioned to the glass, has best grip there.

We'll try some other spots next!

:driving:

osbornsm 05-15-2019 03:38 PM

Quote:

Originally Posted by ZCanadian (Post 3852846)
Good driving. I think there are still some seconds in there, too.

By "setup", do you just mean the camera location and screen overlays, or is the car set up differently between these?

Assuming it's the presentation you are referring to, I like them both. Always a fan of POV racing videos, but the outside perspective is different in a good way. It also lets you review your steering inputs (which are nice and smooth btw). It does attract the following unsolicited advice, though (the danger of posting any video online - ignore or take onboard as you wish). I think your steering wheel is too far from your seat back. Or your arms are too short :-). I like your 9 and 3 grip - very well done - but when you turn to near 12 O'Clock, your arm is too straight and I think you might be reaching your shoulders forward at that. Try positioning your wheel and seat so that with your hips and shoulders pressed against the seat back, you can put your arms on the 12O'Clock position with YOUR WRISTS resting on the wheel (don't take your shoulders off the backrest). This will make it easier on your body to stay still and braced in the corners. If you can plant your feet on the dead pedal or firewall behind clutch and behind the brake with a slightly bent knee, then the seat is the right distance back so adjust the wheel towards you or make the backrest more vertical. A stable, more comfortable driver is a faster driver!

Thank you for the real-life examples of how my driving might differ from the "ideal." I do have a pretty "chill" track driving position. I've always focused on distance to the pedals. Seems i've forgotten to position the steering wheel for lapping duty.

Plus, i hold on to that wheel for dear life in the corners :bowrofl:

ZCanadian 05-15-2019 03:56 PM

Quote:

Originally Posted by osbornsm (Post 3852890)
Thank you for the real-life examples of how my driving might differ from the "ideal." I do have a pretty "chill" track driving position. I've always focused on distance to the pedals. Seems i've forgotten to position the steering wheel for lapping duty.

Plus, i hold on to that wheel for dear life in the corners :bowrofl:

I hear you there, brother! Depending on what rubber you are running, I suspect that you can pull some significant G's in that car!

If you need a bit more help being planted in place without going to a full 4+ point harness solution, consider a CG-Lock device:
https://store.windingroad.com/cg-loc...dd-on-p49.aspx
You can get it from a number of race shops or online. One size fits all, and it locks the lap belt independent of the shoulder part so that you can snug your hips tight. If you then tighten the shoulder strap and tug hard to activate the car's built-in lock, you can get a huge amount of sticking power in the seat. Even if you don't lock the shoulder belt, this does keep the slack from sliding down into the lap belt, so you stay more planted in the seat.

I bet a buddy at the track will have one with him - ask if you can borrow it for a couple of laps to see if it is for you. Install is 30 seconds, and it leaves no marks once you've removed it. If you use it a lot, you may find that it wears the seat belt fabric slightly, right at the buckle.

Keep up the good work, and keep shaving off those 10ths!

ZCanadian 05-15-2019 04:03 PM

2 Attachment(s)
In case you didn't believe me when I said that "I hear you there", check out the G meter...

:happydance:


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