1984 Jeep CJ-7 full electric conversion

[4x4 EVC]

I believe this (post#493) is his final coupling design.

Jeep CJ-7 EV Conversion

HI All, As per John and a couple others, I'm starting this fresh thread for converting my 1984 Jeep CJ-7 ICE to full electric conversion. Basic conversion desires: 100 mile range on fully charged pack Mechanically stock Jeep Retain clutch functionality Tesla Model S battery modules Off the...

www.jeepforum.com

Good to see you guys comparing notes.

Are you setting up play dates for adults again???

 

[FLCJ8]

Are you setting up play dates for adults again???

I figured since you adopted my "Float Shifting" terminology I was allowed to cross post.
I'm following on this site, Jeep Forum, and the 4xe forum (AKA as Pirate4x4 2.0)
No wonder my Jeep is still in pieces.

Now you get back to the project.

 

[4x4 EVC]

I figured since you adopted my "Float Shifting" terminology I was allowed to cross post.
I'm following on this site, Jeep Forum, and the 4xe forum (AKA as Pirate4x4 2.0)
No wonder my Jeep is still in pieces.

Now you get back to the project.

Laughing out loud at that!!!

Yes Sir, you did indeed add that to my Jeep-EV lexicon of parts and actions, apropos.

I mentioned this on one of those sites, now with Regen, I'll have to add back a Clutch Switch on the stick. I have to interrupt the Regen to get the motor to go into 'Neutral' (EV natural is by design as opposed to the natural occurrence of letting off the gas and having the ICE motor naturally slow to ideal speed (rpm). That will allow the Float Shifting again.

Also, I've got a new Throttle Curve that I love. Still a tad timid off the line but perfect in all the rest of the speed settings (3rd gear). If I start in 2nd, zippy-er.

 

[barrys]

Yes Sir:
Coupler


(I really, really hate this one picture per post thingy you guys have, sucks)

Paid forum members can post more than 1 picture at a time.

 

[4x4 EVC]

Paid forum members can post more than 1 picture at a time.

OH, thanks, go it, I'll do that.

 

[ag4ever]

Time to post the number.

Here's my collected data set for Range and Mi/kWh. To summarize, I'm getting about 2.3 miles per kWh or about $0.09 per mile based on what electricity cost me here in Los Angeles.

View attachment 114928

By comparison, my Chevy Bolt is getting a Lifetime of 3.7 mi/kWh but very often we get about 4.4 mi/kWh (not crazy driving, ideal outside temps, a tail wind, flat as all of Kansas OR started at the top of a hill, etc...).

I'm not gonna' lie, for a Repower Starter Kit, 2.31mi/kWh is a home run.

I am getting about 2 miles per kWh in my 4xe, so 2.3 is great.

 

[4x4 EVC]

I am getting about 2 miles per kWh in my 4xe, so 2.3 is great.

Thanks, I know this sounds so stupid but, I can't believe it works and at this rate.

Just hit 705 miles traveled on my EV Jeep since 8/26/2024. Shooting for 1k miles in the next week or so.

I need new tires....

 

[timo439]

Laughing out loud at that!!!

Yes Sir, you did indeed add that to my Jeep-EV lexicon of parts and actions, apropos.

I mentioned this on one of those sites, now with Regen, I'll have to add back a Clutch Switch on the stick. I have to interrupt the Regen to get the motor to go into 'Neutral' (EV natural is by design as opposed to the natural occurrence of letting off the gas and having the ICE motor naturally slow to ideal speed (rpm). That will allow the Float Shifting again.

Also, I've got a new Throttle Curve that I love. Still a tad timid off the line but perfect in all the rest of the speed settings (3rd gear). If I start in 2nd, zippy-er.

Ever think about a switch on the clutch pedal similar to the brake light switch to turn off re-gen? Personally, I love regen and using the clutch to feather the torque,

Care to share a picture of your throttle band? I will get mine at some point, just havent connected my PC in awhile.

 

[4x4 EVC]

Ever think about a switch on the clutch pedal similar to the brake light switch to turn off re-gen? Personally, I love regen and using the clutch to feather the torque,

Care to share a picture of your throttle band? I will get mine at some point, just havent connected my PC in awhile.

STOP rummaging around in my brain!


Obviously, it's the K1-7 Clutch Shift Switch, figured it out about a year or so ago but haven't been able to install it until recently, now that Single Peddle Mode works.

It's AMAZING!

Feels like I discovered something and now I need to either share it with the world or hide it away and keep it my secret.

Works in both directions - shifting up or down but, remember, there is no 'down shifting' since we aren't dealing with engine slow down to ideal, aka 'compression braking'.

Nope, you shift down to get ready for whatever is coming like a turn or a stop light you want to get ready to start faster with or whatever.

I've litterley driven with it working less then 3 times, it's fantastic.

Side note for all those that are building their own and not waiting to buy from me, I use all three Profiles - Profile 1 - No regen, Profile 2 - Med Regen and Profile 3 Hard REGEN. I'm at 40% regen in Profile 3 and while it won't bring you to a complete stop, you don't use your brakes nearly as much and, you get about 15% to 20% regen back into your battery.

Here's my first full trip on regen:
...next post....

 

[4x4 EVC]

cont' from last post...


2.54 miles per kWh!!!

That was in 6:30 surface street driving, normal stop and go AND I got 2.5+ mi/kWh!

Let me get a new screen grab of my Throttle Map and I'll post it, no problem at all and thanks for asking. I'll grab my Profile settings also, you'll need those if doing the work yourself.

- Patrick

 

[timo439]

Hard Regen was too much for my liking. I settled on Medium... No and Low regen was too little stopping resistance.

 

[4x4 EVC]

Hard Regen was too much for my liking. I settled on Medium... No and Low regen was too little stopping resistance.

I adjusted mine to suite my needs:


Like I said, you can adjust as needed. REMEMBER, disclaimer here, you're screwing around with things that 'touch' a bunch of other things (Cutbacks, BDI, Zero Speed Threshold, etc.) which also affect various bits in the BMS as it relates to CCL and DCL.

Mostly, remember, never do any testing in gear and BACK-UP everything. For those of you that haven't used the TAU or Orion BMS, backing up is not the easiest thing - for TAU, it's a sad trip down Windows 98 Lane...

Anyway, Zoom zoom. I'll post my Throttle Map next....

 

[4x4 EVC]

I wish all the magic was on this screen but, a ton of the work you have to do to see this almost completely undecipherable screen is done on some of the other screens I posed.

For reference, I'm using the standard Prius Throttle, it's the only one I've found to be dead on accurate without and noticeable 'drift'.

Fun!

 

[FLCJ8]

Ever think about a switch on the clutch pedal similar to the brake light switch to turn off re-gen?

Yes...
apparently I'm not the only one that thinks this is the way it should be controlled.

Would really help with the muscle memory of using the clutch.

 

[4x4 EVC]

Yes...
apparently I'm not the only one that thinks this is the way it should be controlled.

Would really help with the muscle memory of using the clutch.

Oh no, I don't think anybody on the Jeep sites disagrees with you (me). It's the EV conversion folks that are anti-shift. Too strong but, you get it.

 

[4x4 EVC]

Super quick update on the Stick Switch Single Peddle Mode (incorporating Regen): It's AMAZING!

Told you it was a quick update.

 

[4x4 EVC]

...and after I charged it - stats:


That's right, knocking on the door of 3mi/kWh - WHAT?!?!

 

[timo439]

Oh no, I don't think anybody on the Jeep sites disagrees with you (me). It's the EV conversion folks that are anti-shift. Too strong but, you get it.

Not so sure I agree with this. All of the folks I worked with to figure out my conversion thought it was pretty darn cool that I was keeping the manual.

 

[4x4 EVC]

Not so sure I agree with this. All of the folks I worked with to figure out my conversion thought it was pretty darn cool that I was keeping the manual.

Really - I am surprised. I fully understand and agree with the obvious benefits but sooo many in the EV world think shifting is stupid and not practical.

All that being said, I have a new system design that I can't find anyone else even talking about much less implementing.

No clutch (EVERYTHING in the bellhousing, including the housing is GONE), Custom coupler to Input Shaft of Trans., K1-7 interrupt Sw., Neutral Braking Rate tuned with Free Peddle Rate, only using 2nd and 3rd.

Basically, I have a 2 speed transmission for every day driving and a 4 speed PLUS 2 gears in my TC for off-road.

I don't see any other options for the Jeep world if you want anything like a normal 4-wheel drive.

The problem is, once you go down the Tesla motor route, if you want 4-wheel drive, you have to turn the Tesla motor sideways, add the silliest little CV custom shaft and are locked into 4-wheel drive with only your hubs to get you out. (there are a 1,000 other negative trade-offs in this configuration I won't go into here)

The thing is, many EV builds start with a motor, the Tesla. Once you make that fatal decision for your Jeep, all other decisions start and end there.

With the design you and I did, regardless of the clutch part, we started, presumably, with the notion of keeping the full function of the Jeep and only repowering.

At that point, you're problem solving from a completely different point of view and you end up with Jeeps like ours (again, only assuming that given the limited info I know about your overall design).

Maybe the EV circles you truck in are cooler and more visionary then my installers - OH, wait, I'm the installer, soooo uncool.

Seriously, I'm glad you kept your ability to shift and listened to them.

One last benefit and maybe the lynch pin to going with my setup - Single Peddle Mode. I can't see how it could possible work with a clutch remaining. It can't. The regen benefits are about 12%-18%, that's an additional ~20 miles of range you get because Single Peddle Mode incorporates Regen.

The key is Single Peddle Mode - it's the bomb.

 

[4x4 EVC]

Quick video showing the Single Peddle Mode with Full Regen

A little bit of clutchless shifting also.