Oh dear. If I would have 30k to spend on car, I would not buy a newer car. Modern cars are just so boring.
I might buy a 911 tho, but a one that's way older than that Lotus.
Some people don't buy cars because they are reliable or have good figures on paper, but because they have passion for the cars they like to own.
Had a shot at slalom almost a month ago. Was surprisingly fun considering the speeds you get to aren't very high. Thanks to the one who took these delicious pics of my dirty car.
http://youtu.be/_TmGVVYQsQM
http://youtu.be/_TmGVVYQsQM
Haha yeah that's a clever but lazy way of "fixing" your speedo.
I do a similar thing but the exact opposite, the cheapo rpm gauge on my daily is a little too slow to react so I actually have learned to use the speedometer in first and second gear to indicate my shifting points. IE. I know that in second the rpm limiter will cut off at just below 110 km/h so I will shift up when I see the needle going past 100.
Hint. don't buy Autogauge rpm gauges if you want a tacho that will react to a quickly revving engine.
Cheapo rpm gauges used to be much better when they were analog gauges.
-EDIT Same goes to those cheap chinese monster tacho knock-offs. A worn out Lada engine could out-rev them.
I do a similar thing but the exact opposite, the cheapo rpm gauge on my daily is a little too slow to react so I actually have learned to use the speedometer in first and second gear to indicate my shifting points. IE. I know that in second the rpm limiter will cut off at just below 110 km/h so I will shift up when I see the needle going past 100.
Hint. don't buy Autogauge rpm gauges if you want a tacho that will react to a quickly revving engine.
Cheapo rpm gauges used to be much better when they were analog gauges.
-EDIT Same goes to those cheap chinese monster tacho knock-offs. A worn out Lada engine could out-rev them.
Last edited by BigPeBe, .
It seems that images size of 1024x768 don't show on the forum anymore when trying to use the IMG code? I kinda understand considering the fitment in to the new narrower forum layout, but why was the forum made narrower anyway?
Also I can't see a clear indication of what the new post actually is? On the old forum the unread posts were marked with that orange mark.
I bet this happened because videogames weren't yet around.
It's running a tad rich yeah (11.5 at WOT currently), but I didn't have the "perfect" jets for it while I had the Wideband AFR meter on. I need to order some genuine jets since tuning with the current chinese jets doesn't seem to have the appropriate effects (I went from 145 mains to 140s and the AFR staid pretty much the same). Altho it was a very warm day so I should wait for some colder fall days before I check the AFR again and start adjusting the jetting more. I actually had 150 mains during the winter colds and at least the cheapo AFR meter I was using back then showed good readings.
In theory possible yes, but it's rocking std bottom end so going well beyond 7000rpm might be quite suicidal. Currently the cam timing is adjusted so that the power starts to slowly decrease just before 7000rpm and the limiter is at ~7100rpm. Pretty nice for a street Pinto.
Last edited by BigPeBe, .
Last edited by BigPeBe, .
I'm thinking you need some new promo pictures for the nice new features of LFS, so i produced some.
Surely this is the future of league racing.
Thanks for the link, that's a very interesting channel. The running commentary while he is struggling with the heavy steering and g-forces is priceless!
I really liked this too http://youtu.be/78rLhnr95Oc
Always nice to see a fellow simracer get a change to express himself in the real world.
Blah I found no historic racing cars at ebay so no game for me.
Thanks for the tip, I'll see at some point if it can help me with my sound samples.
Well I think it's time for you read about the basic principle of the 4-stroke engine. Quick google found a wiki page http://en.wikipedia.org/wiki/Four-stroke_engine.
Basically when the intake valve opens the piston draws a lot of air to the engine, so the speed of the air in the intake port quickly increases. When the intake valve closes the speed of the air suddenly drops. This creates an air pulse and as we know, sound is basically just pulsating air, so it makes a sound. The same happens with the exhaust valves, but the air just exits the engine this time to the exhaust piping. Exhaust gases of course are a lot higher in temperature, so it creates a big pressure and when it's released to the exhaust the sound is a lot louder than the intake sound (well at least before it gets muffled by the silencers in the exhaust).
Well since you are in to sound engineering I'm gonna ask you a question. Do you know any free program that can analyze the frequency of a sound file and show it to me in a graphic form?
I sometimes produce quite a lot of sounds for the sims I'm playing and to match the rpm of the files I have to typically use my ear in a similar way that artists use to tune their guitars. When I have a sound clip of a 4 cyl engine going at an unknown rpm, I compare it to an another clip of a 4 cyl engine with known rpm. IE. when I play a clip of 4cyl in steady 8000 rpm and at the same time also play the another clip, I will gradually match play speed of the unknown clip. When the sound stops "oscillating" and they match and if I end up with, let's say a 2x play speed for the unknown clip I know that it's a steady 4000 rpm clip.
But sometimes even clips that sound steady, may have little oscillation on the rpm which is hard to tune out just by ear. If I could see a graphic of the clip showing the frequency(s) second by second, I could use this information to tune the rpm of the clip to a genuinely steady state.
A while ago I tried to find a program that could actually tell me the engine rpm from a sound clip, but I realized that seeing only the frequency would work good also.
Basically what he means is that your math is basically right, it's just isn't the combustion that makes the sound. The intake valves and exhaust valves open at the same frequency than the combustion does too. You basically have two instruments, one being intake valves and the other exhaust valves, playing at the same time at the same frequency.
You also have to know that some engines do have irregular firing order and others don't. IE. the American V8 get's it's thunderous sound from irregular firing "rhythm".
Exhaust pipe lengths also play a part, the main reason why boxer-4 cyl sounds different from straight-4 is that they typically have different length primary pipes on the headers for the different cylinder banks. IE if the exhaust exits at the left side of the car, the left exhaust pipes are shorter length than right, so the exhaust pulse created by the exhaust valves opening/closing will reach the end of the exhaust pipe in a shorter time than the right bank will.
It's true that also mechanical sounds are a part of the engine sound (valve train etc.) but the most important is the intake and exhaust notes. When it comes to engines that make enjoyable sounds (ie. racing engine at full tilt) you can barely hear the mechanical noises from under the pulses that are the "note". Especially if you are far away from the sound source.
I sometimes produce quite a lot of sounds for the sims I'm playing and to match the rpm of the files I have to typically use my ear in a similar way that artists use to tune their guitars. When I have a sound clip of a 4 cyl engine going at an unknown rpm, I compare it to an another clip of a 4 cyl engine with known rpm. IE. when I play a clip of 4cyl in steady 8000 rpm and at the same time also play the another clip, I will gradually match play speed of the unknown clip. When the sound stops "oscillating" and they match and if I end up with, let's say a 2x play speed for the unknown clip I know that it's a steady 4000 rpm clip.
But sometimes even clips that sound steady, may have little oscillation on the rpm which is hard to tune out just by ear. If I could see a graphic of the clip showing the frequency(s) second by second, I could use this information to tune the rpm of the clip to a genuinely steady state.
A while ago I tried to find a program that could actually tell me the engine rpm from a sound clip, but I realized that seeing only the frequency would work good also.
Basically what he means is that your math is basically right, it's just isn't the combustion that makes the sound. The intake valves and exhaust valves open at the same frequency than the combustion does too. You basically have two instruments, one being intake valves and the other exhaust valves, playing at the same time at the same frequency.
You also have to know that some engines do have irregular firing order and others don't. IE. the American V8 get's it's thunderous sound from irregular firing "rhythm".
Exhaust pipe lengths also play a part, the main reason why boxer-4 cyl sounds different from straight-4 is that they typically have different length primary pipes on the headers for the different cylinder banks. IE if the exhaust exits at the left side of the car, the left exhaust pipes are shorter length than right, so the exhaust pulse created by the exhaust valves opening/closing will reach the end of the exhaust pipe in a shorter time than the right bank will.
It's true that also mechanical sounds are a part of the engine sound (valve train etc.) but the most important is the intake and exhaust notes. When it comes to engines that make enjoyable sounds (ie. racing engine at full tilt) you can barely hear the mechanical noises from under the pulses that are the "note". Especially if you are far away from the sound source.
Last edited by BigPeBe, .
Well not really since XRG has 4 cyl engine and FZR 6 cyl, they wont sound similar because LFS "synthesizes" the engine sounds.
That little randomization between other cars is a good idea though!
Boring dyno video from yesterday:
http://youtu.be/jGqHECwrtBg
Guess my estimate of about 300 bhp wasn't that badly off.
I suffered a headgasket failure today tho, gotta sort that out first before any more chachacha.
http://youtu.be/jGqHECwrtBg
Guess my estimate of about 300 bhp wasn't that badly off.
I suffered a headgasket failure today tho, gotta sort that out first before any more chachacha.
Hahaha. They're adding screamer pipes.
I agree on iRacing but disagree on Forza.
iRacing seems to do sounds really good, most of the sounds I have heard from it are clearly recorded from real engines/cars with good sound equipment and the sounds aren't distorted. Or if they have managed to synthesize them somehow they have done a great job and the audio guys really seem to know how certain types of engines sound.
That Forza on other hand... Horrible. That clip you posted, the sound is distorted to hell. Sounds just like the marketing speech would make me assume it would sound, they have recorded some decent audio but then ruined it trying to make it sound rough and kewl.
Forza has potential tho, some of the clips I have heard are clearly good, but all of them seem to be ruined to some extend because they wanted to make the cars sound "better" than they actually do.
If Assetto Corsa is going to get a better audio engine, it's of course good, but this still won't help to fix the problem that most car games have and that is the audio samples itself. You can still achieve pretty good result with simple audio engines like in gmotor, but you need good quality samples with no distortion which are hard to find and to record them you need to book some time with the actual cars. Or at least with cars that have similar engine layouts.
Some cars already sound pretty good in AC, but some sound really stupid, like the E30 M3. The problem with this car isn't the audio engine but the poor samples that it's using.
BTW I have yet to heard a single car game that has gotten the sound of a naturally aspirated 4-cyl with double carbs right. GTL got somewhat close. Or pretty much any 4-cyl engine for that matter. I find this interesting because from all of the available exotic cars, this type should be one of the easiest to find and book some time for recording. I might try to record my own car at one point, but I doubt my microphones are up to the job.
Last edited by BigPeBe, .
Just had my first rounds on this game.
It's the same game than BF3, just a little more confusing.
It's the same game than BF3, just a little more confusing.
50 ms at idle? No way, I just checked one of my own Megasquirt logs and my car runs under 2 ms opening time at idle (reasonably big injectors tho) and even at 1.6 bar boost @ 6000 rpm the injector opening time is 7.6 ms with 80% duty cycle.
-EDIT- Are you sure the values weren't 5 ms and 2.5 ms? This way the values could make sense if the injectors are a lot smaller than mine. Can't really explain where the 2.5 ms at overrun comes from tho. Makes no sense really. Only thing what comes to mind is that Toyota wants to cool down the engine with squirting a little petrol in there but not igniting it. I just would assume this not being really that necessary.
-EDIT- Are you sure the values weren't 5 ms and 2.5 ms? This way the values could make sense if the injectors are a lot smaller than mine. Can't really explain where the 2.5 ms at overrun comes from tho. Makes no sense really. Only thing what comes to mind is that Toyota wants to cool down the engine with squirting a little petrol in there but not igniting it. I just would assume this not being really that necessary.
Last edited by BigPeBe, .
Engine wont destroy itself by lean mixture during engine braking. Lean mixture is only dangerous when there is more load.
Fuel injection systems have been cutting 100% of the fuel during engine braking from the start of their era. It was one of the major selling points versus the carbs, for every day customers because it allows "big" fuel savings.
Your engine will still make noise because it is running as a kind of an air pump. It still passes air thru it and they pulse to the exhaust with the rhythm created by the exhaust valves opening. There just isn't any combustion. And plus the mechanical noises.
Checking the mpg readings on a car's driving computer isn't an accurate way of determining how much the injectors are open at the moment.
Fuel injection systems have been cutting 100% of the fuel during engine braking from the start of their era. It was one of the major selling points versus the carbs, for every day customers because it allows "big" fuel savings.
Your engine will still make noise because it is running as a kind of an air pump. It still passes air thru it and they pulse to the exhaust with the rhythm created by the exhaust valves opening. There just isn't any combustion. And plus the mechanical noises.
Checking the mpg readings on a car's driving computer isn't an accurate way of determining how much the injectors are open at the moment.
Last edited by BigPeBe, .
FGED GREDG RDFGDR GSFDG