The last box got me up to 5400rpm on a 3rd gear run... I'm not satisfied yet, but it's a start. I'll report all this back to JC and see what he says.

 

That's weird Roadie as I'm using the factory ECU/harness along w/ the FAST harness and I get an rpm signal but yet it still will not fire (it'll burp) so I'm not sure even that schematic would work in my case. I may have to try it though just for giggles.

What in the world? 5400 this time? Something is in that box well at least you got higher. Has to be something simple I'd think but I'm no electrical expert either.

Thanks for the update!

 

How did it feel pulling to 5400rpm?

 

about the same as 4800rpm... It's about a half a second more in 3rd gear, if that.

 

Yeah... I had 0 rpm when I tried the regular cable. I don't think we've had the same problems. As I said before, Delteq will generate spark even when not commanded to during it's learning cycle. I'd bank on it as being a fuel problem.

Drop me a log file if you have one... jhuegen AT gmail.com

 

Well I tried that fix and I have cranking rpm showing so that didn't change anything. The only thing it did change is my FP wouldn't hold. Put everything back as it was and I'd hold FP and still see an rpm crank showing.

Battery is getting low...ha-ha from all this cranking...down to 10 volts but he'll I use to be able to crank my 396 w/ 8 volts. Putting the HI-6R as I type but won't get to fire until later this wk as I'm waiting on the coil.

Roadie if I knew how to export the log I'd would've sent it to you but everytime I go to export it to my desktop or where ever it says it's accomplished but then there is nothing there. WTF?

 

if you go to the directory where it's installed, there will be a directory in there called log. All the log files are kept in there. I haven't logged anything with the XFI software, but the WP software saves the last long taken as temp.log all the time.

The important bits I'd be looking at would be the injector pulsewidth while cranking. It takes about 1ms to open the injectors and my 75lbers are at about 1.2-1.3ms at idle, meaning they are only open for .2-.3ms. If my injectors took 1.2ms to open, it wouldn't get enough fuel to fire...

What kind / size injectors do you have? What's the injector opening time set to? And the of course, the pulsewidth at crank would be important to know...

 

Thanks I'll check that log. Running 72lb RC's and the setting is at 1ms. Don't know the pulsewidth at crank...I can find out though.

 

Sounds like this is the problem, unless I misunderstood Roadie's post.

 

So you are saying I need to go higher? Hey I'll try anything once.

 

Its sounds like it takes the injectors 1ms to respond and then opens fo .2 ms when you have the pulsewidth set to 1.2, so if your set to 1 ms, then there is no actual on time for your injector... it sounds like anyway. Try 1.2 and see what happens.

 

It adds the injector opening time to the pulsewidth it calculates that it needs. So, mine is set to 1ms injector opening time, and it needs .2-.3ms of fuel at idle. Total injector pulsewidth (including the time it takes to open) is 1.2-1.3ms for idle.

If you suspect that it's not getting any fuel during cranking it could be that the injectors are taking longer to open than the computer is commanding them to open for. Most injectors will be set to 1.0 and work fine.

 

Hey Roadie. Any luck yet? I got mine to start but I cant get it to idle correctly. Its loading up and I have to keep my foot on the gas to get it to run. Could you send me your gct file so I can compare your calibration tables to mine. I think I already fouled my plugs. Thanks, Rob.

 

wow... i picked the perfect time to check back in... I've been gone for some time (2-3 months) now with business trips, the race team, and my son was just born on Friday.

I have it all sorted out with a special Delteq box. It runs great up through 6400 rpm now, but the tach is off after about 4800 rpm (where my original mysterious rev limiter seemed to be). The tach is correct up to that point and then after, it pegs the needle over 7k rpm before I really hit 6k rpm.

I plan to move the tach line to the signal before the Delteq box to see if it helps. If it doesn't help, I'll deal with the dash tach being screwed up as long as everything runs and functions right. Passengers really enjoy watching the tach needle slam into the dash as I accellerate.

 

You guys are making me regret selling the Delteq now. Roadie what is special about the box and is JC going to make any more? Glad to know yours is running now minus the tach issue.