[quote=kinghappy;30000]if they’re like the leaf 90% of ah is between 4.1 to 3.5 . it’s pretty linear between those numbers . you’re going to need to get these to that 4.1v number to get your range . 4.2v I would guess well give you 5% more range .
p.s. Dave got your voltage drop kit today . well try and install this weekend.[/quote]
Looks close. My test shows 80% between 4.15 and 3.49.
For those testing voltage spoof.
This shows the part to remove to re-pin plug. Best to take it right off as shown.
Picture is from programming cable, but shows the red part removed.
Once removed it’s easy to see how pins are released.
If it doesn’t work out, no problem. Just put it back to stock.
For those with T3 or T4. New kit allows monitor function to work.
Same kit for T1 and T2 but no way to test…:o
finally got a chance to work on the gem this week . thought I would pass on some info .( dave , hope u don’t mind me posting here , it is consistent with the info here)
so add two more leaf cells to the pack. then added a digital volt/ amp gauge . decided ii wanted to do a little testing with the gauge in 20 cell mode so bypassed the 2 new cells . fully charged pack to 82.8v , 4.14 per cell . then took it for a hard ride.
full throttle acceleration , voltage dropped only 3 volts for about 3 seconds and then came back up to 80.8 , under full throttle at 36 mph voltage only sags 2 volts . it just confirms why lithium is so fast , voltage stays high under hard load .
the second thing I found more interesting is that amps jumped to 350 in about the first 2 seconds and then fell immediately . by second 4 they were under 200 and by about second 6 to 7 were only 100 amps . at 36mph they were about 90- 95 , unfortunately there was a bunch of traffic and thunder started . so testing had to stop .
what is surprising is we turn our controller up from about 335 to max of 355 to get more power , but on my cart its not over the 335 mark for more then a second . I really don’t think raising it makes much a difference. now on hills or with a lower voltage maybe it well .
the plan is to run it hard tomorrow and drain the pack down , see what happens to amps when voltage is closer to what gels put out . when voltage drops well it draw higher amps to compensate ?
what well voltage sag be when the pack gets lower ?
then well hook up the other to cells and Dave’s voltage spoof thingy .
speaking of Dave . I WAS nice and happy with my gem , faster then I wanted , accelerates like a rocket . great range . But then along comes Dave and he starts pushing the limits and making me think it can get even better . so I spend most my weekend tearing a part my gem that I have been totally happy with to see if it can faster . my wife is pissed at me and I didn’t get any of the things done I was suppose to . All because of DAVE . I couldn’t be happier!
I’ve been running my car on 100 volts with no problems.
Turned the A current down.
Do you have monitor function working in Sentry?
Only issue I have is shaky from a dead stop when acc slowly.
The pedal is so lightly loaded that it’s hard to be smooth.
Not sure if I should turn the creep speed and rate up or down?
Or maybe try to add integration circuit to throttle input.
I also have the spoofer but have yet to tear into the gem its running so well i have been timid to touch it but i have a question on charging the 12 modules do you think the zivan ng1 can be turned up enough?
Moved on to other threads and batteries. Many have went the Chevy lithium route.
Volt, Spark, and Bolt.
Search for above. I encourage posting results in open forum, but a lot of information gets hidden in pm questions.
