Ford Mustang Forum banner

1 - 20 of 25 Posts

·
Registered
Joined
·
70 Posts
Discussion Starter · #1 ·
I discovered that the XCAL2 datalogging feature can tell you speed, distance travelled, throttle position, rpms, and (I think) clutch engagement..all on a timeline....wow...I never really thought about what I could datalog....now...oh man...unexpected tools to log, compare and critique your launching and shifting anytime yiou want!

Did I really powershift like I thought I did?
How fast are my speedshifts?
When I shift by sound only, what are my shiftpoints?
What was my 0-60, or 0-100 or 1320 time on this long desert highway with cool wind in my hair?

and with temperature sensors...we can answer the question plastics or cast aluminum intake tube?

Too friggin cool.

Now I need to go weld that bung in and tweak away!
 

·
Registered
Joined
·
1,314 Posts
Bobbo said:
I discovered that the XCAL2 datalogging feature can tell you speed, distance travelled, throttle position, rpms, and (I think) clutch engagement..all on a timeline....wow...I never really thought about what I could datalog....now...oh man...unexpected tools to log, compare and critique your launching and shifting anytime yiou want!

Did I really powershift like I thought I did?
How fast are my speedshifts?
When I shift by sound only, what are my shiftpoints?
What was my 0-60, or 0-100 or 1320 time on this long desert highway with cool wind in my hair?

and with temperature sensors...we can answer the question plastics or cast aluminum intake tube?

Too friggin cool.

Now I need to go weld that bung in and tweak away!
Yep the stuff is very cool... Like you I've used to calculate 0-60.. shift firmness (automatic) and it was very handy for diagnosising my intermittant "failsafe" problem... I had a faulty TPS... you could actually see the voltage drop and go goofy!
 

·
Registered
Joined
·
2,479 Posts
Just a note to the Diablosport Predator crowd, you can do the same. I was amazed to see how the spark retard is always changing depending on conditions. Like when I hit the nitrous the ECU instantly works to retard and advance spark as needed. Cool.
 

·
Registered
Joined
·
1,314 Posts
5twenty said:
Just a note to the Diablosport Predator crowd, you can do the same. I was amazed to see how the spark retard is always changing depending on conditions. Like when I hit the nitrous the ECU instantly works to retard and advance spark as needed. Cool.
Sounds like your knock sensor is picking up some detonation and pulling some timing... may want to think about pulling some timing on your nitrous tune... I think the spark knock sensor will only pull some much timing... just a thought...
 

·
Registered
Joined
·
2,479 Posts
fishingjts said:
Sounds like your knock sensor is picking up some detonation and pulling some timing... may want to think about pulling some timing on your nitrous tune... I think the spark knock sensor will only pull some much timing... just a thought...
Thanks for the thought, fishingjts, since I've been on this board I've always respected your opinions.

However, I'm pretty sure I have no detonation (my AFR is right down the middle and my daily driving tune is very conservative 91 octane tune made by the most respected tuner in this area, Blood Enterprises), just normal adjustment to spark. Check out your retard during normal everyday driving, without nitrous. The retard is constantly changing. It's just a very dynamic engine. My 4.6 anyway, not sure about your 4.0. A buddy of mine with a bone stock GT sees the same dynamic spark adjustments during normal driving.
 

·
Registered
Joined
·
886 Posts
are you guys running wide band O2 sensors? How does that work? I've discovered the joy of dattalogging, but think I'd have a lot better info for changes if I had the wide band.
 

·
Registered
Joined
·
2,479 Posts
ultraclyde said:
are you guys running wide band O2 sensors? How does that work? I've discovered the joy of dattalogging, but think I'd have a lot better info for changes if I had the wide band.
Widebands are on the future mods list. It doesn't matter how you tune your car, if you don't know your air/fuel you don't know if you could be damaging your engine. I'm just talking about the data you get from your OBDII port for logging with your Predator/Xcal. You can tell a lot about what is happening in your engine with this data. For instance when I was getting dyno'd the technician could tell by how the spark retard was acting that my nitrous shot was reaching the engine before the fuel shot. Which makes sense since the nitrous is at 1000 PSI and the fuel at, what, 40 PSI? So we made the nitrous hose a foot longer, thereby delaying it's delivery by a bit. The HP and torque curves smoothed out immediately because the engine wasn't trying to deal with a lean condition (when pure nitrous was delivered) then immediately after that a more lean condition (as the fuel shot finally arrived a split second later).
 

·
Registered
Joined
·
1,749 Posts
5twenty said:
The retard is constantly changing. It's just a very dynamic engine. My 4.6 anyway, not sure about your 4.0. A buddy of mine with a bone stock GT sees the same dynamic spark adjustments during normal driving.
dont forget guys. it has variable timing. (at least the GT anyway, dont know about the 6) got to love it. its even cooler that you can see it work on your tuner, especially when you hit the nos.

5twenty, how that nos system doing? done any other tweaking? :drool:
 

·
Registered
Joined
·
1,749 Posts
5twenty said:
Widebands are on the future mods list. It doesn't matter how you tune your car, if you don't know your air/fuel you don't know if you could be damaging your engine. I'm just talking about the data you get from your OBDII port for logging with your Predator/Xcal. You can tell a lot about what is happening in your engine with this data. For instance when I was getting dyno'd the technician could tell by how the spark retard was acting that my nitrous shot was reaching the engine before the fuel shot. Which makes sense since the nitrous is at 1000 PSI and the fuel at, what, 40 PSI? So we made the nitrous hose a foot longer, thereby delaying it's delivery by a bit. The HP and torque curves smoothed out immediately because the engine wasn't trying to deal with a lean condition (when pure nitrous was delivered) then immediately after that a more lean condition (as the fuel shot finally arrived a split second later).
very cool 5twenty. filing this post away for future reference....

forming my "how to nos my stang without blowing her up guidebook." :happyhapp

a lot of yours and fishingjts' posts are in it....:winks
 

·
Registered
Joined
·
2,479 Posts
GTNOS said:
5twenty, how that nos system doing? done any other tweaking? :drool:
We've had 28 consecutive days of rain here. Hard rain. No N20 for 3 over three weeks. However, the track opens up for test 'n tune in 3 weeks. I'll finally get an ET with the nitrous and new gears. If it ever stops raining.
 

·
Registered
Joined
·
1,749 Posts
and im sure you will be posting those #'s right?:winks youve got me on the edge of the seat of my computer chair here...:drool:
 

·
Registered
Joined
·
1,749 Posts
btw, send some of that rain down here! we are burning the hell up in OK. friggin fires every where. havent had a drop since Oct. mid Oct at that! worst drought weve had in 20 years theyre saying.... cant even grille a steak outdoors with the burn ban. seriously, its getting bad!:eyebulge:
 

·
Registered
Joined
·
2,479 Posts
billy_tripper said:
Could someone explain to me how to use my Xcal II to measure 0-60 and 1/4 mile times?
You need an accelerometer for that. Escort Passport G-Timer is one. I have one and it works like a champ.
http://www.escortradar.com/gtimer.htm

But the best thing to do would be go to the track.
 

·
Registered
Joined
·
1,314 Posts
billy_tripper said:
Could someone explain to me how to use my Xcal II to measure 0-60 and 1/4 mile times?
Have you done any datalogging with the X-Cal2? Basically you need to hook your x-cal2 to your car and to a laptop. The laptop need to have a package called LiveLink from SCT (it's a free download). You can then log all kinds of thing on your car, including MPH and Distance Traveled Since Start Up. I use this method for my 0 to 60. This assumes of course that your speedometer is accurate...
 

·
Registered
Joined
·
2,479 Posts
I don't need any Xcal experience to know what data is available from OBD II. There is no ACCURATE way to determine 60 ft or 1/4 mile times from OBD II data. What happens if you spin your wheels, even a little? How can OBD II data account for that, among other things? Any ET estimates by using OBD II data are just that, ballpark estimates at best. If you want an accurate estimation use a G-Timer. If you want the true number, go to the track.
 

·
Registered
Joined
·
1,314 Posts
5twenty said:
I don't need any Xcal experience to know what data is available from OBD II. There is no ACCURATE way to determine 60 ft times from OBD II data. What happens if you spin your wheels, even a little? How can OBD II data account for that, among other things? Any ET estimates by using OBD II data are just that, ballpark estimates at best.
I quoted Billy and ask HIM if he was familiar with LiveLink... not you... Go back and read his question... he said 0 to 60 MPH... no one said any thing about 60' times...

My ODB II data for my 0 to 60 MPH is very close to my G-Tech times... neither one of them is 100% accurate but they are close enough to be valuable...
 

·
Registered
Joined
·
2,479 Posts
fishingjts said:
neither one of them is 100% accurate
My point, exactly. Thanks.
 

·
Registered
Joined
·
70 Posts
Discussion Starter · #19 ·
Good point about spinning tires throwing off your 1320 times..didn't think of that :dunce:

In any case, I did not expect now think very much about how much instrumentation was available for dataloging....figured I'd be looking at more esoteric diagnostic data...:?: . it was a pleasant surprise. since it's tough for me to get strip or road course time...made me do a few whole shots and compare data between runs! :winks

Actually, I think it's time for a few more runs!
 

·
Registered
Joined
·
867 Posts
Hey 5twenty,

What else do you need to do datalogging with the Predator? Does it read out on the tuner or do you have to download it to a computer?
 
1 - 20 of 25 Posts
Top