Exhaust dyno graphs

[ruzzle]

.....And my old 6-volt VeeDub when I carried a torch so that I could nip round the front occasionally to see if the headlights were on.......

 

[STRIPES]

nlrace1@bigpond.com

I run Nev's stuff in my big power R3

Not only did he supply special parts, he advised & mentored me through a couple of builds

TOP MAN

What Triroc said.

 

[1olbull]

Nearly 100 yards a second. I read somewhere it takes .8 of a second to react. That means you've covered 80 yards before you start to back off and reach for the brake lever or change direction. Reminds me of the nights riding my TR6 Trophy with a headlight that illuminated about 50 feet and you knew it was going to take about 200 feet to stop if you had to.

Well actually Bruce, 95.65 yards per second.
For the detection, identification and decision phase, the .8 seconds would be in the ball park. However, the response phase, moving to and applying the brakes including lag time would add another .7 seconds or so.

Perception response time (PRT) will vary based upon the type of situation, eccentricity and complexity of the detection and identification phase.
For a general rough daylight perception estimate start with 1.5 seconds. Usually between 1.5 and 2 seconds in the daylight and around 2 to 2.5 seconds at night.
You are showing your age a little as it was back in the 60s that .75 second was the "rule of thumb" estimate for perception response,
PRT went up 1.0 second in the 70s, then as research and understanding improved it went to 1.5 seconds in the 80s.

PRT is usually a little quicker riding a motor than driving a cage; but, the increased time of using two brakes balances both of them out and naturally the use of both brakes on a motor is paramount.
BTW - very cute your use of "yards". You really wanna be a 'Merican, I reckon.

 

[bruce aussie]

Was taught imperial system at school. Australia didn't change to metric until about 1975. I still have to convert measurements back to imperial in my head to visualize how long something is. Like 2.4 meters that's roughly 8 feet or 100 ml is roughly 4 inches. When working in my shed I tend to use both I work in millimeters when doing presice work. All my tapes have both imperial and metric.

 

[Boog]

Math, science...go figure...

 

[ThingKing]

Since I had the CES headers & collector pipe mounted this week, my butt dyno felt a major increase in power. But now I got the dyno results, and there is something interesting in this curve.

The "before" curve looks just like Nev's dead stock curve, with the stock bump at 5500 still in place?! My secondaries should be open at all times due to TuneEcu. So what's that bump?

The "after" curve got it sorted out, more or less. 156,5 hp looks like a very nice result, cause the TOR's are still in place - BUT could it be that I missed the point on how to get rid of that bump?

2014 R3R
Before: Ramair, TORs, TuneEcu (secs open 100%, rev limit 6700, top speed 260), PC3 custom dyno tune. 139,3 hp
After: same setup + CES headers & collector pipe, new dyno tune in PC3. 156,5 hp.

I would be really happy to get some guru advice on this.
Thanks!

 

[1olbull]

around right way hopefully

The description did not come out. Lower line is a dead stock Rocket 3, note speed limiter etc in place. Green lione is with TORS unifilters and tune. Red line is with Jardine exhaust, unifilters and tune. Upper line in Dark Blue is with REBAND exhaust unifilters and tune. Engine is DEAD STOCK never had the rocker cover off.

Sorry for the post on a three year old thread, BUT this comparison test on the same dyno is AWESOME!
Sure would like to see a graph line up there with the others for a CES!!!
How bout dat, bloke in a steel shed???

 

[Neville Lush]

It is not up to me. If some one comes in with the pipe on and I tune it , I can cross reference the graphs. Send 'em in big bull..

 

[bruce aussie]

Sorry for the post on a three year old thread, BUT this comparison test on the same dyno is AWESOME!
Sure would like to see a graph line up there with the others for a CES!!!
How bout dat, bloke in a steel shed???

Tin shed, don't know about America but over here tin and steel same thing but different

 

[1olbull]

It is not up to me. If some one comes in with the pipe on and I tune it , I can cross reference the graphs. Send 'em in big bull..

So then youse Aussies with the CES take a rip over to the "tin shed" and lets all see how it stacks up!!!!