iracing.com

[Tyrgaus]

I still dont understand the problems with the NTM.. if they are getting hot on you.. Fill some air into them.. I seen so many people going way down on the air pressure and then complain about how they over heat.. Then I just want to say blame your self, but I have found it amusing to see people think what obviously work in the OTM don't work on the NTM..

I seen people actually think 14-20PSI is enough hot air pressure on a race car with a weight of 1500kg.. funny..

My problem is that cold tires are WAY to fast compared to warm tires. Not talking overheated here. Straight of the pits tires are way to fast compared to a couple of laps old tires. Been racing the Ford GT and you REALY notice it there.

 

[Jav]

Did anyone try the Week 13 24 hours du fun? It's actually FUN for the first time.

Oh yes it is!! I had a blast last night on the Ford GT! Got spu arround on the esses at the start then got back up trough the field to catch every GT car up to the 4th place Corvette! for the first part of the lap it was crazy seeing cars flying and crashing everywhere!!

 

[smuffyatfcp]

My problem is that cold tires are WAY to fast compared to warm tires. Not talking overheated here. Straight of the pits tires are way to fast compared to a couple of laps old tires. Been racing the Ford GT and you REALY notice it there.

I heard the DP has a slower top end on colder tyres

 

[Tyrgaus]

I'm kind of a knucklehead I guess. I didn't have a problem with the OTM, and I don't have a problem with the NTM. It's the same playing field for everyone.

For me they are both a monumental step up from Gran Turismo's tire model which is goofy. The overheating and wear in GT5 is something to complain about in my opinion. iRacing feels good to me.

Yes we are all in the same boat. But the problem is that its not very realistic. And that is what iRacing is all about. Im not saying I know all about racing car, I realy dont know anything
But I do know that colder tires are slower than warm tires in reality.

 

[Mac K]

Did anyone try the Week 13 24 hours du fun? It's actually FUN for the first time.

Ya, came 3rd in the C6R today, it nice not having to worry about SR and IR.. Even though this makes people drive like nuts some times.

How did you all do in Season 4 2012?

I won my division championship in Grand-Am (Mustang) and inRacing News (Solstice). Plus a few TT championships.

And how about for this coming season?

Full time in Grand-Am (DP) and inRacing News (Solstice) plus select weeks in Grand Touring Cup (MX-5, Solstice), Mustang Challenge, Proto/GT (C6R) and Indy Car Oval, plus the occasional Nvidia cup now that they're on new tracks.

 

[spinner]

Yeah , I'm loving the 24 hrs du fun too. Got a 3rd in the C6R first race , then next race I was sitting in 2nd but got disconnected. That never happens ? I checked the results later on and half the field got dropped on the same lap so it must have been a server issue.

I had an okay season 4. Top 20 in Div 4 V8 supercars (17th?) and around 26th in the Star Mazda. The last few rounds were pretty rough so I should have been in the top 20 there also.

I'll stick with the V8SC for another season , people say it can take a long time to really find pace in that car so we'll see if another season helps ! With the improved participation in the GT series , I'll give it a go for season 1 '13

 

[Matty]

Week 13 ain't all that bad.

http://members.iracing.com/membersite/member/EventResult.do?&subsessionid=7379554&custid=101189

 

[Tyrgaus]

Had a blast in the Ford GT! 58 car grid!!! Luckily qualified for P2 on the grid.
Into T1 I just saw a whooole lot of smoke and cars going all over the place in my mirror xD Ended up taking first so im pretty happy with that ^^

Didnt race anything consistently this season, as always >_<

But next season iv got a lot of plans!
Running my second season in Blondies world tour, realy great leage!
And im running in an endurance leage, not sure if im gone run the McLaren or the Ford GT though. Il probably find out when we get the new steering model ^^ The races are 2-3 hours long and run every second weekend.
Last but not least im gone try and run the FW31 in official races. At least thats my plan! Hope I can pull it though Such a fun car to drive!!


Edit: Results from the week13 race http://members.iracing.com/membersite/member/EventResult.do?&subsessionid=7379483&custid=86953

 

[noshog]

I was going to run a couple of the fun sessions in the Ford GT too, if someone wants to link me to a good set and advise fuel levels it'll be much appreciated 👍

Oh and I got 26th overall for Star Mazda, should've been better but just couldn't be bothered running last round to improve. Pretty quiet season for me, I didn't run anything else for more than a couple of rounds.

 

[Matty]

My Cadillac seems to have a irrational fear of understeer. Something I'd actually like in that car..

 

[Tyrgaus]

I was going to run a couple of the fun sessions in the Ford GT too, if someone wants to link me to a good set and advise fuel levels it'll be much appreciated 👍

Oh and I got 26th overall for Star Mazda, should've been better but just couldn't be bothered running last round to improve. Pretty quiet season for me, I didn't run anything else for more than a couple of rounds.

Great setups here! http://members.iracing.com/jforum/posts/list/1844203.page

I think about 65L should be enough fuel.

 

[Jav]

I was going to run a couple of the fun sessions in the Ford GT too, if someone wants to link me to a good set and advise fuel levels it'll be much appreciated 👍

.

I used to go for Niek's setups, but have found Turkkila's setups suit my driving a lot better:

http://members.iracing.com/jforum/posts/list/1844203.page

 

[Tyrgaus]

I used to go for Niek's setups, but have found Turkkila's setups suit my driving a lot better:

http://members.iracing.com/jforum/posts/list/1844203.page

I realy like Niek's setups. That is probably what I am going to stick with in the future. Gone do some more testing before I settle down though.

 

[noshog]

Cheers Jav and Tyrgaus

 

[Mac K]

I used to go for Niek's setups, but have found Turkkila's setups suit my driving a lot better:

http://members.iracing.com/jforum/posts/list/1844203.page

I like Turkilla's as well.

 

[superbike81]

I didn't really accomplish anything this season except getting my $10 in participation credits, which means almost-free Interlagos for me including my 25% discount.

 

[Jav]

This season I had a few tech dificulties wich didn't let me compete for any championship. But 2012 was quite a good year, 2 runner up and a 3rd for the Vette on Div 3 on the Proto/GT series and a lot of great racing to go along with those!

Ohh! And Legends Car + Oran Park Gymkhana = Fun on EPIC PROPORTIONS!!!!

 

[Roush_fan_99]

I was bored the other day and found out that the legend car on infield toad course @ LVMS was pretty fun too. Is the legend @ oran a one day deal?
Edit: such a fail I'll just leave that typo....

 

[ErikAndre71]

My problem is that cold tires are WAY to fast compared to warm tires. Not talking overheated here. Straight of the pits tires are way to fast compared to a couple of laps old tires. Been racing the Ford GT and you REALY notice it there.

This is true, but worse effect when actually having to little air pressure in the tiers. Because when you have to little air pressure the tires warm up in a unnatural way. The qualify setup I made for the Riley on Daytona I can almost not control the car the first half of the out lap. But when they reach work temperature (made sure that happened before the bus stop chicane) the car feels stuck to the road.

The work temperature do however get there to fast, but I used way to many hours to figure out the tires, because even veterans in the sim community giving away setups are stuck on putting in way to little air in the tires and blame the NTM.

My guess is that this was the way to heaven with the old tires, but I wouldn't really know as I haven't been around when the OTM was present.

But after hundreds or even thousands of laps I figured out the sweet spots of the tires on the car(s) I use. I'm not giving that away to the sit down and race every two hour guy who expect everything to be perfect. But I can give you the advice you guys to do the same. I'm just glad I don't race the Formula 1 car of the sim, all that aero grip and physical grip would make me crazy. Because I'm not happy before I understand it completely

But formula cars would accept a lot more dynamic to the air pressure, because the car is super light and the tires are over dimensioned. But those cars use some of the high sidewall of the tires to do the job of the suspension and of course that much rubber will take away heat better than a lower profile tire.

Just for better understanding. A normal road car (european car) use from 28-33PSI in their tires. If you run around on really low profile tires it's not unnatural to even go all the way up to 40PSI. But road cars don't push the tires in the same way as a race car so that high air pressure would be stupid. But maybe the numbers give you the idea that using less than 20 PSI in a 1300kg-1500kg race car is a bit like running on flats.

I have to admit I haven't got much experience with slicks tires, but no one here have either. Not even someone who raced in a car or two.. Well maybe you understand that slick tires on that particular car. But there are tons of different slicks tires with tons of different behavior. Our goal must to be to understand the tires we DO have, not to complain about something we didn't test much out. _OBVIOUSLY_

And now let the testing begin, not the pull my post apart posting, because I spend all this time writing this post to be helpful and not to step on anyone's toes

 

[Matty]

Just DC'd from a 15 second class lead in 24 hours du fun..

Even though I got screwed on the start by a crash on the grid.

Started 39/40 and was in the top 10 overall as well.. Ah well maybe tomorrow..

 

[Kamuifanboy]

read in game when hovering over where you adjust air pressure.. and less air pressure will over heat a tire in the real world also. So i hope they don't fix something that is spot on..

Some small issues is there, but the over heating is user mistake, not tire model.

This is what the game says

Air Pressure in tire as measured when the tire is "cold" (room temperature); lower pressure = more heat buildup, better grip at lower loads; higher pressure = less heat, better grip at higher loads

Very intriguing to me. All the racing engineers I've worked with have said that lower tire pressures gain heat slowly and over time. While Higher Tire pressures will gain heat quickly and will often overheat. Although the grip characteristics they describe are correct.

 

[superbike81]

I have to admit I haven't got much experience with slicks tires, but no one here have either. Not even someone who raced in a car or two.. Well maybe you understand that slick tires on that particular car. But there are tons of different slicks tires with tons of different behavior. Our goal must to be to understand the tires we DO have, not to complain about something we didn't test much out. _OBVIOUSLY_

We have every right to complain about a tire that behaves unrealistically and has virtually zero wear. I'm not talking about the temperature stuff you are, just the general behavior of the tires is wrong, very very wrong. Cold tires should not be so fast, and I should not be able to drive on the same tires for 2 hours and only lose 0.5 seconds after the initial falloff.

Oh, and I think Shinya (Kamuifanboy) might have just a little bit more real world experience than the rest of us. I would suggest listening to him.

 

[Roush_fan_99]

Lower pressure = larger contact patch with ground = higher friction = more heat

The only reason I'd do what you say Kamuifanboy is when it rains and you have treaded tires, a higher pressure bulges the tire opening the grooves allowing water to pass through easier

And yes the tires should take longer to "come in" in sim it's 1 lap, IRL on ovals it's about lap 6-12 before a tire has best grip temp typically

 

[ErikAndre71]

This is what the game says


Very intriguing to me. All the racing engineers I've worked with have said that lower tire pressures gain heat slowly and over time. While Higher Tire pressures will gain heat quickly and will often overheat. Although the grip characteristics they describe are correct.

LOL

It depends on what numbers we are talking about.. people are driving their tires way to low.. Meaning almost all the way down to flat.. What happens when you do that.. Don't ask your racing engineers.. Normal physics say that this tire will allow the car to move more back and forward. This create friction, friction create heat.. If your racing engineers say otherwise.. get a new one.

Lowering air pressure on a gocart on steroids isn't the same as lowering it in a 1300-1500kg car man. So what would work on your formula (something) isn't the story for all race car and race car tires..

 

[Kamuifanboy]

LOL

It depends on what numbers we are talking about.. people are driving their tires way to low.. Meaning almost all the way down to flat.. What happens when you do that.. Don't ask your racing engineers.. Normal physics say that this tire will allow the car to move more back and forward. This create friction, friction create heat.. If your racing engineers say otherwise.. get a new one.

Lowering air pressure on a gocart on steroids isn't the same as lowering it in a 1300-1500kg car man. So what would work on your formula (something) isn't the story for all race car and race car tires..

Why are you getting defensive? Or sounding really defensive? I am no physics major. I am just saying what I have been told by other people. When I did tire pressure practice sessions, higher pressures generally came back with a higher temperature than with lower pressures. This could be down to other factors of course.

 

[ErikAndre71]

I'm defensive now? I think you are defensive.. I actually on the offence stating something everyone else seem to think they know all about..

I posted to be helpful, that's it.. So lets just agree we don't agree and I can go do races with no hot tires and you can sit here whine about it. I really don't care.

 

[Roush_fan_99]

Actually I believe that comes down to aerogrip, I can't remember what it was you race atm but it creates a lot of downforce right? And that acts just like described in the iRacing.TV video posted a couple pages back. A long time ago in Quarter Midgets (basically a go kart w/ a roll cage) we used to say something like 1 pound of pressure was equal to 70 lbs/sq in of spring rate, in larger cars I assume the numbers are quite different but similar effect

 

[superbike81]

I hate qualifying, I suck so bad at it. Had a couple easy 1:44.7's and blew them with a 1x at either the entry or exit to the bus stop. Couldn't get a clean lap in the 5 or 6 laps I did.

Whatever, I'm just going to qualify at my race pace, not try to push it anymore.

 

[gogatrs]

I'm not trying to attack anyone, just contributing to the conversation.

On my go kart, we ALWAYS step up the pressures for shorter races and qualifying or wet/cold track. That way the temperature comes up faster.
And vice versa.
And you can notice the temperature change quite easily on the go kart.
And then you can feel it go away again when the tires start to get too hot.

The theory is that the higher pressure stretches out the tire more to create a larger contact patch. A lower pressure will decrease the size of the contact patch.

Obviously that's just the go karts, which could behave differently than real cars. But that's the general idea.

 

[Wilbur]

I'm curious even if I this is a long shot but it's a thought I had on tire temps. I'm wondering if reason why we have things like cold tires being fastest, little tire wear and all that is to allow folks to drive hard from green flag. I mean let's say it takes 10 laps (oval) to get tires up to where they are at their best, how often do we ever get 10 laps to get there in races? It also allows the faster guys to pull away to keep from bunching up to a degree instead of those guys who end up wrecking without letting car settle and heat build up. I'm sure most will disagree only way I can think of maybe why they are weird.

Granted if this were true and they build the NTM correct, people would learn to drive to keep tires where they need to be to last or get up to temp before pushing hard. One thing that I've notice is on some tracks you can push hard on cold tires, then you have the drop off, then after that tires seem to be steady after usually about 20 laps on a set.


On another note, I haven't raced this week but did I read both trucks and class A will be racing together?