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That is an interesting question. I would guess it may require TCM tuning. Wouldn't it affect shift timing, and pressures as the speed at which the engine speeds up and slows down would be different. Can anyone do TCM programming?
I asked this because I was asked by a friend who is very performance oriented and who recommends the change for earlier series Corvettes with manual boxes.
We were discussing benefits and neither of us are familiar as to possible advantage/disadvantage with DCT.
Considering the Z06 version I don’t know if the DCT is the same as the LT2 setup.
The Tremec DCT in the Z06 is 'revised' from the original in the Stingray. Which I read as "These things were problematic in the base car so let's change some things". Changes include:
-upgraded clutch pack presumably to handle more torque
-strengthened casing to handle higher lateral loads
-revised bell housing to accommodate a larger oil sump (Z06 does not need 2L additional fill for track duty)
-larger output shaft flanges for beefier half shafts
-5.56 final drive (7.5% shorter than Z51 Stingray and a whopping 13.7% shorter than a base car)
Unfortunately, it suffers the same puzzling overall gearing which makes the car fall flat on its face in 4th gear. The shorter final drive masks this a bit but they really, really NEED to revise the gearing of this car.
As to your actual question, I don't see the feasibility of opening this gearbox and doing anything to it until the tuning for the ECU and TCU is fully cracked. I can only imagine what would happen if physical changes were made without the electronic overlords being on board. The car would probably just throw 30 different codes and refuse to start.
Yeah, thanks. I did look for engine and trans cutaways before asking and could not really make it out. But, you're right ...I just now typed in 2020 corvette flywheel and it popped right up. Here also is a little info on it from an SAE article:
"Connecting the LT2 engine’s crankshaft to the TR-9080’s clutch basket is the responsibility of a flywheel carrying the
starter ring gear and a centrifugal pendulum damper that’s needed to quell torsional vibrations erupting during the
engine’s migration between V4 and V8 firing modes (a fuel efficiency improver). "
Makes sense that the flywheel needs some special sorcery to quell vibrations when shutting down and refiring half the cylinders.
My next question was going to be "does it also still have a harmonic balancer at the other end of the crankshaft?" So, I looked that up too, and sure enough they are for sale on ebay.
Just like the C7 had a dual mass flywheel on its manual to deal with AFM, I figured the C8 did as well. Does anyone know if the C8Z06 uses a different flywheel since it doesn’t have AFM and revs extremely quick? Or is all the weight loss in the rotating assembly and the clutch is actually heavier being it has an extra disc to deal with the extra power I believe?
Unfortunately, it suffers the same puzzling overall gearing which makes the car fall flat on its face in 4th gear. The shorter final drive masks this a bit but they really, really NEED to revise the gearing of this car.
.
This is the killer for the C8. GM wanted quick 0-60 times but still good fuel economy. To do 0-60 in under 2.8 seconds in a 3,500lb+ car with 500hp N/A GM got really aggressive with the final drive. Which is fine, except they also wanted to retain fuel economy ratings, so they made 4,5,6,7 and 8 all ODratios. 🤦♂️
This was such a terrible decision by GM. The Z51 Stingray does 40-110 in 7.5 seconds, but does 60-130 in 10.5 seconds. We need someone to sell revised ratios, 5th gear should be 1:1 and only 6,7 and 8 should be OD.
The other solution is change the final drive, but I actually like the steep final ratio, it works really well for the C8.
This is the killer for the C8. GM wanted quick 0-60 times but still good fuel economy. To do 0-60 in under 2.8 seconds in a 3,500lb+ car with 500hp N/A GM got really aggressive with the final drive. Which is fine, except they also wanted to retain fuel economy ratings, so they made 4,5,6,7 and 8 all ODratios. 🤦♂️
This was such a terrible decision by GM. The Z51 Stingray does 40-110 in 7.5 seconds, but does 60-130 in 10.5 seconds. We need someone to sell revised ratios, 5th gear should be 1:1 and only 6,7 and 8 should be OD.
The other solution is change the final drive, but I actually like the steep final ratio, it works really well for the C8.
Keep in mind the C8 has more aero drag with it’s better cooling as it has more power than previous generations and more rolling resistance as it has wider rear tires, those things don’t help triple digit acceleration either and I don’t believe it’s all gearing slowing it down.
Keep in mind the C8 has more aero drag with it’s better cooling as it has more power than previous generations and more rolling resistance as it has wider rear tires, those things don’t help triple digit acceleration either and I don’t believe it’s all gearing slowing it down.
