RUF CTR YELLOWBIRD

[Ridox2JZGTE]

First of all, I don't have AC as my PC is not good enough and I need some data from RUF CTR for reference, so I have small favor to ask for AC owner Just a simple data collection for boost level and power output if possible. The boost level can be adjusted using number keys from 0 - 10, with presumably 0 at 100% and 10 at 0%, while 6 or 60% is the default value. I got this much from a user on another forum and I just need the boost level as shown on the dash ( in Bar ) for default/stock, minimum and max value with power output if possible

I have checked several videos of RUF CTR run in Assetto Corsa, some has higher boost level, some lower Just want to get clearer in depth look at the range. If the gear ratio, stock LSD lock % value on power + coast and weight figure+distribution are available, that will be greatly appreciated. I have real life data for reference and comparison.

@Lewis_Hamilton_ , if you have time for this, I will be thankful.

No one ?

 

[Eunos_Cosmo]

I know! I was curious to see how fast each car lapped Mugello. The F40 felt faster and sort of more composed, but they were within 1 second of each other in my hands. Quite a match up!

 

[Eunos_Cosmo]

First of all, I don't have AC as my PC is not good enough and I need some data from RUF CTR for reference, so I have small favor to ask for AC owner Just a simple data collection for boost level and power output if possible. The boost level can be adjusted using number keys from 0 - 10, with presumably 0 at 100% and 10 at 0%, while 6 or 60% is the default value. I got this much from a user on another forum and I just need the boost level as shown on the dash ( in Bar ) for default/stock, minimum and max value with power output if possible

I have checked several videos of RUF CTR run in Assetto Corsa, some has higher boost level, some lower Just want to get clearer in depth look at the range. If the gear ratio, stock LSD lock % value on power + coast and weight figure+distribution are available, that will be greatly appreciated. I have real life data for reference and comparison.

@Lewis_Hamilton_ , if you have time for this, I will be thankful.

No one ?

Max is a little less than 1.5 bar.

 

[Ridox2JZGTE]

Max is a little less than 1.5 bar.

Thank you, much appreciated. Any chance for the rest of the of each number keys values / boost level ? Does it show any power output ? If you can provide other infos from the car ( from setup menu ) like I posted - gear ratio, LSD, spring, weight + distribution ? I have requested member from other forums with AC sub forum, and they haven't respond yet after a week

 

[Lewis_Hamilton_]

Thank you, much appreciated. Any chance for the rest of the of each number keys values / boost level ? Does it show any power output ? If you can provide other infos from the car ( from setup menu ) like I posted - gear ratio, LSD, spring, weight + distribution ? I have requested member from other forums with AC sub forum, and they haven't respond yet after a week

I would send you the car's data files, but they are encripted. I'll take photos of each settings screen in a few minutes and post them here for you, that's all the data we're able to see.

 

[Ridox2JZGTE]

I would send you the car's data files, but they are encripted. I'll take photos of each settings screen in a few minutes and post them here for you, that's all the data we're able to see.

While you are on AC, could you please make a note of the max boost level on default setting when on track ? There's a boost gauge on the dash and I have seen varied max boost on AC videos. 1.5 Bar is max from eunos_cosmo said. I wanted to cross reference real life data and AC. I'm on finishing phase of a replica and in need of confirmation of several data set.

The real YB only allow 2 preset boost level ( on the MNP 911 car ) Ruf owners can increase boost level higher with custom mapping, and with higher octane fuel & a refined fuel map - even at stock boost level, modern time Ruf CTR can output higher power and torque than back in 1987 claimed figure ( which was modest claim by Alois Ruf )

 

[Lewis_Hamilton_]

@Ridox2JZGTE This is everything available that we are able to see. Note: At full throttle as shown in bottom picture, max pressure is 1.136 bar at default boost settings. All settings are default.

 

[Ridox2JZGTE]

@Ridox2JZGTE This is everything available that we are able to see. Note: At full throttle as shown in bottom picture, max pressure is 1.136 bar at default boost settings. All settings are default.

Thank you Half pound higher boost than real life stock boost data, pretty accurate Sprung weight is the actual car weight when driven on track right ? Pretty close and car mass would wet weight ?

Seems to be quite complete, and gearing is the same, I wonder if it tops at 200mph at 7000rpm. Ride height seems to be calculated differently, the real CTR is half inch lower at the front and 40mm lower at the rear than 930 at stock 6.4" ground clearance ( collected from various sources ). When it was tested back in 1987, it had 2.5 rear camber on the top speed run, with higher boost level used and presumably lower final ratio ( still need more data on this ) - as the driver reported 339 kmh at 7000 rpm.

Interesting data nonetheless. I will make another version based on AC data

 

[Lewis_Hamilton_]

Ride height may have been affected as I was on the throttle in one of the pictures. All statistics are live data so always changing, but I remained station for about 3 minutes so that they settled before applying full throttle for a boost reading.

Wet weight I guess includes the driver (not sure how much the game adds) and 30 litres of fuel, the game may well include all fluids in the wet weight calculation but I couldn't tell you.

 

[Ridox2JZGTE]

Ride height may have been affected as I was on the throttle in one of the pictures. All statistics are live data so always changing, but I remained station for about 3 minutes so that they settled before applying full throttle for a boost reading.

Wet weight I guess includes the driver (not sure how much the game adds) and 30 litres of fuel, the game may well include all fluids in the wet weight calculation but I couldn't tell you.

I see The ride height data I gathered is from corner weight of an owner with full fuel tank and probably a driver ( not confirmed ) + cross reference with old reviews. The weight distribution data was obtained from gross weight vehicle plate ( front and rear + total ) and said corner weight, Alois Ruf really improved the distribution on the CTR ( less rearward than stock 930 Turbo )

The real CTR fuel tank capacity is 105L.

 

[20832]

The RUF with 100% boost (close to 1.4bar??) is even more of a beast and introduces wheel spin in 2nd gear

 

[Ridox2JZGTE]

The RUF with 100% boost (close to 1.4bar??) is even more of a beast and introduces wheel spin in 2nd gear

1.5 Bar according to @Eunos_Cosmo That would be over 600PS if done in real life Even on stock boost, CTR would spin on almost every gear when it was tested in the 80's ( with a driver crazy enough to hammer it without care )

 

[20832]

1.5 Bar according to @Eunos_Cosmo That would be over 600PS if done in real life Even on stock boost, CTR would spin on almost every gear when it was tested in the 80's ( with a driver crazy enough to hammer it without care )

You mean like this guy?

 

[Johnnypenso]

1.5 Bar according to @Eunos_Cosmo That would be over 600PS if done in real life Even on stock boost, CTR would spin on almost every gear when it was tested in the 80's ( with a driver crazy enough to hammer it without care )

On the 80's tire compound you can spin the tires in 3rd gear if you are even slightly off balance and that's on a flat track. Second gear is mostly smoke if you floor it, you have to feather the throttle at all times in second gear. @20832 might be referring to the track tire compound which has more grip.

The 30L of fuel Lewis was referring to was the 30L every car comes with. You add fuel for racing or take it away for qualifying, but it appears that every car comes with 30L out of the box.

 

[Ridox2JZGTE]

On the 80's tire compound you can spin the tires in 3rd gear if you are even slightly off balance. Second gear is mostly smoke if you floor it, you have to feather the throttle at all times in second gear. @20832 might be referring to the track tire compound which has more grip.

The 30L of fuel Lewis was referring to was the 30L every car comes with. You add fuel for racing or take it away for qualifying, but it appears that every car comes with 30L out of the box.

Yeah, I guessed the same, 30L would be default fuel, not full tank I also noticed another visual difference to the real car on the snapshot lewis give 2 visual error then - one of them is the mirror, the other is in the interior.
The LSD also incorrect if it came with 40% lock on power from factory, RUF offered 60% lock on power as base setup since BTR release and CTR has higher lock than BTR. Coast or overrun lock seems to be correct at 40% ( one of the old review mentioned it vaguely )
The car mass seems to refer to total weight, not gross max weight. I have made simple calculation to approximate spring rate if the frequency 2.3Hz used, with the data that I have collected from various sources - motion ratio ( wheel rate + spring rate from torsion bars used IRL ), weight distribution from Ruf books + VIN Plate, sprung weight, unsprung weight, and spring frequency at 2.3 Hz ( very high for a car with street Dunlop Sport from the 80's, although the motion ratio helped ), the equal frequency is intriguing if that what's used in the real car as it's an RR with rear heavy bias. The real CTR very likely used coilover ( Bilstein damper used ) together with the torsion bar.

The spring rate result were F : 139.85 lb/in and R 249.76 lb/in - this won't be accurate as I assumed the weight distribution using real life data. While the rear spring if uses 0.75 motion ratio ( some claimed this ), then it would be 451.8 lb/in.

Also found interesting RUF CTR race from Best Motoring, higher power than claimed ( not MNP 911 ), but still a RUF Vin build. Boost level not mentioned clearly, might be the higher preset as used when tested for top speed back in 1988, it has 510+PS.

Sprung weight of the CTR in AC is very close to empty/dry weight of the real car as tested in Auto Motor Und Sport in 1988 at Nardo Test Track Italy, where it reached 342 kmh and the test driver made a point that the power was over 500PS in order to do it ( close guess ).

For top speed, I am curious if AC CTR tops at 339 kmh at 7000rpm with the gearing ( correct ratio as officially released by Ruf ), in GT6, 200mph / 320kmh at 7000rpm with the same correct gearing.

Edited : Made a correction on the spring rate ( used the wrong figure when calculating )

 

[Johnnypenso]

Yeah, I guessed the same, 30L would be default fuel, not full tank I also noticed another visual difference to the real car on the snapshot lewis give 2 visual error then - one of them is the mirror, the other is in the interior.
The LSD also incorrect if it came with 40% lock on power from factory, RUF offered 60% lock on power as base setup since BTR release and CTR has higher lock than BTR. Coast or overrun lock seems to be correct at 40% ( one of the old review mentioned it vaguely )
The car mass seems to refer to total weight, not gross max weight. I have made simple calculation to approximate spring rate if the frequency 2.3Hz used, with the data that I have collected from various sources - motion ratio ( wheel rate + spring rate from torsion bars used IRL ), weight distribution from Ruf books + VIN Plate, sprung weight, unsprung weight, and spring frequency at 2.3 Hz ( very high for a car with street Dunlop Sport from the 80's, although the motion ratio helped ), the equal frequency is intriguing if that what's used in the real car as it's an RR with rear heavy bias. The real CTR very likely used coilover ( Bilstein damper used ) together with the torsion bar.

The spring rate result were F : 179 lb/in and R 269 lb/in - this won't be accurate as I assumed the weight distribution using real life data.

Also found interesting RUF CTR race from Best Motoring, higher power than claimed ( not MNP 911 ), but still a RUF Vin build. Boost level not mentioned clearly, might be the higher preset as used when tested for top speed back in 1988, it has 510+PS.

Sprung weight of the CTR in AC is very close to empty/dry weight of the real car as tested in Auto Motor Und Sport in 1988 at Nardo Test Track Italy, where it reached 342 kmh and the test driver made a point that the power was over 500PS in order to do it ( close guess ).

For top speed, I am curious if AC CTR tops at 339 kmh at 7000rpm with the gearing ( correct ratio as officially released by Ruf ), in GT6, 200mph / 320kmh at 7000rpm with the same correct gearing.

I enjoy just driving so much in AC that I haven't gotten into tuning just yet, mostly making small LSD adjustments and changing camber and tire pressure to get more even heating in the tires. Yesterday I had to adjust ride height by 10 points to get a mod car on the track and I noticed as I was doing it (while in the top screens Lewis posted above), it was changing the camber and toe and maybe other stuff, incrementally as you made the ride height adjustment. I thought that was very interesting and adds a whole new dimension to tuning.

 

[Ridox2JZGTE]

I enjoy just driving so much in AC that I haven't gotten into tuning just yet, mostly making small LSD adjustments and changing camber and tire pressure to get more even heating in the tires. Yesterday I had to adjust ride height by 10 points to get a mod car on the track and I noticed as I was doing it (while in the top screens Lewis posted above), it was changing the camber and toe and maybe other stuff, incrementally as you made the ride height adjustment. I thought that was very interesting and adds a whole new dimension to tuning.

I read somewhere that you can read raw data values of spring and damper in AC ( shown in tuning setup screen when on track ) , but only on mod cars ( non encrypted ). I think that would helped a lot in tuning suspension.

 

[20832]

@20832 might be referring to the track tire compound which has more grip.

+
Yep, I'm using Semislicks on the Yellowbird, I know.... I'm a little pu**y

 

[Johnnypenso]

+
Yep, I'm using Semislicks on the Yellowbird, I know.... I'm a little pu**y

It is tough to get the hang of on the old tires, especially when you heel and toe and have ABS off. But oh boy when it comes together...it's like dancing with Sofia Vergara doing the tango...that beautiful rear end is swaying back and forth in perfect rhythm and it's a thing of beauty.

 

[20832]

My god, this thing is a bucketload of fun on Street90s
Drifting for DAAAAAYS!

 

[Eunos_Cosmo]

It is tough to get the hang of on the old tires, especially when you heel and toe and have ABS off. But oh boy when it comes together...it's like dancing with Sofia Vergara doing the tango...that beautiful rear end is swaying back and forth in perfect rhythm and it's a thing of beauty.

Sofia Vergara with a very finely sharpened hatchet who gets a little "stabby" if you push your luck.

 

[Eunos_Cosmo]

I read somewhere that you can read raw data values of spring and damper in AC ( shown in tuning setup screen when on track ) , but only on mod cars ( non encrypted ). I think that would helped a lot in tuning suspension.

So I made a video of the Ruf, you might like it:



I switch the boost maps half way through, so you can see what 0.55bar vs 1.4bar looks like.

 

[Ridox2JZGTE]

So I made a video of the Ruf, you might like it:



I switch the boost maps half way through, so you can see what 0.55bar vs 1.4bar looks like.

Cool video 0.55 Bar would be about to 300+PS, not far from 930 Turbo, and 1.4 Bar is max, not 1.5 ? My replica in GT6 uses stock power, and on CM it's tricky, not as good as AC car though, the physics alone is on a different level

 

[Eunos_Cosmo]

Cool video 0.55 Bar would be about to 300+PS, not far from 930 Turbo, and 1.4 Bar is max, not 1.5 ? My replica in GT6 uses stock power, and on CM it's tricky, not as good as AC car though, the physics alone is on a different level

Yeah it honest to god feels like driving a real car. The RR Yellowbird feels so different than other RWD cars. You can feel how crazy light the front end is and how it just wants to push all the time unless you use inertia to slide it around. You feel the tires so well through the FFB, right when they are about to lose grip and you can really use it to drive faster. I've played other sims and none of them compare.