S85 to P85 upgrade

[skiddie]

Hello i am new to this forum , want to know what must be changed in S85 classic to be P85 ( motor , configuration ?? ) i have read somwhere here that motor is same on both is this true ?

 

[MP3Mike]

Hello i am new to this forum , want to know what must be changed in S85 classic to be P85 ( motor , configuration ?? ) i have read somwhere here that motor is same on both is this true ?

It has been covered multiple times. The motor might be the same but the inverter, that is part of the driveunit that contains the motor, is not usually.

Here is a recent post about upgrade possibilities:

Pretty much all of the Tesla drive units on eBay are garbage. They're usually the motors they can't use in vehicles. Especially the sport ones. They'll have bad bearings, be a crap revision, bad inverter, flood cars, etc. Just say no to eBay. It's full of trash these days when it comes to this stuff. They get away with it because really no one knows what they're buying, has no way to test the stuff, etc.

(Edit: After posting this, got in a browser tab rabbit hole glancing at Tesla parts on eBay... and holy moly. So. Much. Trash. Some standouts: a base motor "with only 5000 miles"... that's actually a twice remanufactured unit from mid 2013 (even without knowing that, it even looks like it's been around a while, so pretty unlikely to have only 5k miles)... a 2019 P100D motor where the picture is of a 2014 base motor. Several other "SPORT" motors that show base units in photos. Some battery modules that are 60 modules without being specified. "250 Ah" battery modules always crack me up. Lots and lots of other scammy listings. Sheesh.)

If you have an 85 RWD (or any other Tesla really) and don't care about warranty, I do upgrades. They must be done at my shop, and I make zero exceptions to this. Don't ask me to program your car or do any other nonsense remotely. The answer is no.

85 -> P85 - If your base motor is in good condition, and we've got a good sport unit, ~$4500 with the core return. Includes labor, programming, etc. ~$6900 if your base motor is garbage for resale (bad bearing, clunky diff, etc... like if you got it on eBay).

85 -> "P85++" - Requires battery swap or battery modifications, plus a custom modified performance dual motor rear DU swap. Varies depending on vehicle. If your pack is in good condition, a one for one swap at a reasonable cost to an upgraded one is an option. The motor upgrade is costly, since it needs to be a specific variant to handle the added power. $9k with a good core, $12k w/o. Battery upgrade can be costly if yours isn't upgradable (vast majority of RWD 85 packs are not) and has more degradation that is useful for a swap/resale. Case by case.

In all honesty, your wallet is the limit on upgrades. Even then I make basically nothing doing them, either. Just get my guys paid and cover costs.

Can make virtually any model any other model if you're willing to pay for it. Single motor to dual motor is where I draw the line, thought, as this requires extensive body modification, and it just doesn't make sense to do it. Given the high cost, I'd rather just buy your car and sell you an AWD and be done with it.

Basically can make any RWD S into any of these: 40, 60, 70, 75, 85, P85, 90, P90, 100*, P100*, P85++*, P90++*, P100++*
And any AWD S or X into any of the above, or any of the following: 60D, 70D, 75D, 85D, 90D, 100D, P85D, P90D, P100D, P85D, P90D, P100D

(* - There are software update caveats involved with these, as they're not officially supported configurations.)

Also have experimented a bit with making AWD cars into front wheel drive for improved efficiency (~5% more range) at the expense of peak power. I'll gladly do this for "free" if anyone wants to go that route, too... keeping the rear motor, of course.

Again, just a matter of cost. In the vast majority of cases, selling your car and buying the car you want is less expensive, has fewer (if any) warranty implications, etc. In most cases, I try to talk people out of upgrades.

If you still really want to do one, shoot my guys a note via 057tech and we'll see what we can do. Probably will try to talk you out of it still and go from there.

 

[Chaserr]

I remember reading wk057 (who sells these upgrades) post something about how a small number of cars can be upgraded with a firmware flash to the drive unit but most need a Performance drive swapped for the original.

 

[skiddie]

I think that some custom firmware will do the job like with normal ICE cars that can be easely tuned to have more power some with 10 hp but others with more than 80 hp without some hardware modifications we speak for some 10-15 kw more here that not hurt for shure motor , do we know where is stored exactly the firmware that controls inverter depends of temperature and driver ( gas pedal ) and so on ?

 

[canasion35]

Any update on this thread? I want to see if going from an 85 to a P85 is worth it in terms of acceleration.