New Tremec TR-9070 DCT in a SLC?

for one thing, you would want the TR-9080 as that one is designed as a transaxle. the other thing is that according to Tremec, these axles are for OEM only and are not sold aftermarket.
 
I’m assuming you mean the TR-9080 transaxle in the new C8 Corvette ; well Tremec won’t sell the transmission controller for the aftermarket, and the software itself I’m sure GM spend millions tweaking/perfecting it and likely they won’t release it to the aftermarket either because of complexity of sensors. And even if it did you’d need a pretty expensive aftermarket ECU that accepts commands from TCU (throttle blip on downshifts , rev-match on upshifts etc. ) I’m waiting for a brave someone to use the engine/trans from a wrecked C8 and make it all work. There’s still some hope for that.
 

Scott

Lifetime Supporter
I've read that it weighs 341 pounds! I wouldn't put that much weight in the back of a SL-C. I have a Ricardo and it's a beast at 267 pounds (If I recall correctly). That's ~60 pounds more than a Graz and the Tremec would be ~130 pounds more the Graz. The problem isn't the increase in weight, but rather that it's exactly where you don't want it.
 

Brian Kissel

Lifetime Supporter
Here's the link.

I have a deposit on the upcoming rumored 1000hp version, perhaps a ZORA or ZR1. I put the deposit down in August of last year and my dealer said I was #9 on his list for it then. Tremac is hard at work on a updated version for it. Various people speculate it will be a 10 speed. My dealer says not to expect it until 2023. That's OK by me, as I retire in October of 23.

Regards Brian
 

Ken Roberts

Supporter
Lets see him get warranty on that broken axle with the addition of him spraying nitrous. Probably not a good idea to be broadcasting the video if he tries to get warranty...lol
It appears to be owned by LG Motorsports so I'll assume it will be used for designing upgrades.
 
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As a software/electronics guy, I think the needed reverse engineering to build a TCU is doable. You won't ever get GM level of integration, but you could build a damn nice unit that functions well. As an example my, then 16yo, wanted to replace the factory ECU in our Lotus Evora. With a little bit of encouragement, but no hands on help, he was able to reverse engineer the CanBus protocols to make the dash/security/TC/ABS all function with an off the shelf ECU.

I see this as no different. It is just work, time and $. Question is, who is going to make those investments. We thought about it and decided not to. I hope someone else does.

If I was going to make that time and $ investment, I'd put it towards building me an electric SLC. Already calculated I'd need $60,000 worth of cells to build a suitable battery for my use.
 
I guess the “simplest” way would be to wait for a new C8 to crash (Front End Damage) and do an entire drivetrain swap.
It’s strange they have a page on their company site promoting the Gearbox and a pdf with all the specs but ZERO with regards to consumer availability.‍
 

Joel K

Supporter
As a software/electronics guy, I think the needed reverse engineering to build a TCU is doable. You won't ever get GM level of integration, but you could build a damn nice unit that functions well. As an example my, then 16yo, wanted to replace the factory ECU in our Lotus Evora. With a little bit of encouragement, but no hands on help, he was able to reverse engineer the CanBus protocols to make the dash/security/TC/ABS all function with an off the shelf ECU.

I see this as no different. It is just work, time and $. Question is, who is going to make those investments. We thought about it and decided not to. I hope someone else does.

If I was going to make that time and $ investment, I'd put it towards building me an electric SLC. Already calculated I'd need $60,000 worth of cells to build a suitable battery for my use.
Frank, not sure if you saw this. This guys is building an electric GTM. Chevy volt battery packs, Tesla drive unit, and universal control system. Some very good videos of the build’s early stages.

 
As a software/electronics guy, I think the needed reverse engineering to build a TCU is doable. You won't ever get GM level of integration, but you could build a damn nice unit that functions well. As an example my, then 16yo, wanted to replace the factory ECU in our Lotus Evora. With a little bit of encouragement, but no hands on help, he was able to reverse engineer the CanBus protocols to make the dash/security/TC/ABS all function with an off the shelf ECU.

I see this as no different. It is just work, time and $. Question is, who is going to make those investments. We thought about it and decided not to. I hope someone else does.

If I was going to make that time and $ investment, I'd put it towards building me an electric SLC. Already calculated I'd need $60,000 worth of cells to build a suitable battery for my use.
It’s definitely doable, as a matter of fact autoBionics have successfully integrated LS3 engine and the Porsche PDK using the syvecs ECU and the Porsche TCM that’s perhaps modified a bit. However the entire package is very costly and quite frankly the PDK is nowhere as strong as the Tremec unit from Corvette. I’m hoping someone will develop aftermarket TCM for the Corvette transaxle like we have standalone TCM’s for regular auto boxes.
 
Joel, had not seen the GTM project. We did the math the other day to see what we would need battery wise to make it to the turn around at BBORR in the unlimited class. Just the bare cells came out to $60,000. And then you need to be able to recharge them in less than 2 hours in a town that probably has no 3 phase power.

The upcoming Tesla Roadster won’t make it.

Hard to beat the energy density of gasoline.
 

Bob Winn

Supporter
Frank,

Would love to hear about your math on the EV batteries. I have done similar for a SLC with dual tesla large drives in a RWD set up (800 kw peak, 180 kw for 30 min easy with 9 ton active cooling), and 4x tesla small drives in AWD configuration (960 kw peak, would probably be pack limited to ~850-880, 300 kw for 30 min same cooling). 300kw should be good for a top speed in excess of 200 MPH in a 2800 pound SLC. I think 160-170 average MPH/ 60 miles is achievable for alot less then 60K in batteries. I think you could do it with a maybe a 47 kw/ 2400 Amp pack of LG chems. You could recharge that pack on a 220 V 90 Amp line in about 2 hours.... the pack is only 18 batteries, less than 700 pounds, you could put that pack together for less than 10k. I don't know the BBORR course well, so i don't know what your average throttle would be over the 60 miles, but that pack could do about 50% output for 1 hour.

I have doing a lot of thinking and CAD drawing around this idea. The SLC is great for a RWD setup. Plenty of room for the batteries and twin drives, would require some chassis modification, but nothing exotic. The AWD setup is another story. Would require serious modification to the front tub.

I have been leaning more and more to the AWD setup in a Ultima. Could be done with modest chassis modification. Had most of it T'd up, but with the market crash, dropping 100K on a car seems irresponsible right now.

Teslas are really amazing pieces of technology, especially the drives. The are just not optimized for racing. They are engineered to do ~250 miles at ~70 MPH. If you only need ~50 miles, at ~150 mph, different gearing, batteries and cooling can get you there.

bob
 

Brian Kissel

Lifetime Supporter
There is a fellow on the Mid Engine Corvette forum that you guys should talk to also. Might give some more insight. If either of you are interested, I could try and hook you up.

Regards Brian
 

Fran Hall RCR

Moderator
GT40s Sponsor
Bob
no need for twin tesla drives a single unit will do the job for RWD
I have explored AWD multiple times in an SLC but nobody has ventured to do it.
 
Bob
no need for twin tesla drives a single unit will do the job for RWD
I have explored AWD multiple times in an SLC but nobody has ventured to do it.
Fran, could you modify the current monocoque to accept a front diff and driveshaft or would you have to design a new one from scratch?
 
Bob,

My son, the engineer, and I discussed this afternoon. He used CD/frontal data from Fran. He came up with something over 175kwh. I came up with 350kwh. I think somewhere along the line I doubled something I shouldn’t have. I believe his number is in the ballpark. That makes for $30k in cells. Plus BECs, packaging and such.

That based on 200mph with no-regen. At Big Bend we tend to coast into a corner letting aero drag do 80% of the braking. Brakes are more fior weight transfer (setting the car).

We both assumed 40 minutes at speed + fudge factor for getting to/from grid + 20% not used to avoid killing the packs.

We are both confident the SLC is capable of moving the record to 200 average. Keep in mind the guys going 215+ on the straights are averaging 175 because they are running 20-30 year old NASCAR cars - complete with those hard skinny super speedway tires.

To put Big Bend in another light, I’ve run my Freightliner (when I broke the SLC), It can run flat on the governor (93mph) from start to finish without squealing the tires. I am confident I could run it 105-110 if the governor was turned off. So if my 14,900lb (empty), 11’ tall truck can average over 100....
 
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