Same same

 

"Designed to hold up to 8600rpm"
"Rated for over 1000hp and 800 torque"

Weird, that sounds oddly specific to two C8 variants we already have.

 

Likely working this manual Tremec up as an option for the C9. Feasibly some will justify their need.

 

Thats quite a jump from first to second. Isn’t the C7Z A8 around 10.? : 1 in first?

 

Hmm, driving my C8 Z51 and E-Ray (same gearing) in Z-Mode (which I often use driving in my rural area) it seldom shifts past 5th. That is the highest gear it needs for the way I drive. 5th is a 0.66:1 OD ratio. Combined with the Dif and Intermediate gear provides the equivalent to a 3.43:1 Dif about the same as a typical car with a 1:1 top gear trans like my 1974 Datsun 260Z. In fact, less aggressive than my 1st car a '41 Ford Coupe Hot Rod that originally came with Henry's high mpg, 136 cid flathead called a V8 60 (for 60 hp.) To get up hills it came standard with a 4.44:1 Dif!

After 5th gear in a C8 the other gears, especially 7th and 8th are there mainly for GM to achieve higher mpg in the EPA Required mpg test. For both City and Highway required test cycles if you look at the acceleration required, the C8 probably only needs about 75 hp. Very light throttle. Heck that test is defined so ~100 hp cars can met the acceleration rate requirements.

I don't use an Interstate so even my excursions to triple digits in our rural area, are when accelerating fast and quickly backing off. So 5th is all that is needed and all in Z-Mode it automatically uses. JUST because GM provides the higher OD gears doesn't mean you have to use them!

Granted max speed in 5th is ~120 mpg (Z51 gearing.) 6th max speed ~160 rpm. So a 0 to 160 would need a shift to 6th. If for whatever reason your hung up on 60 to 130, sure a specific gear ratio would be better. But could say the same for 60 to 140! Now if you are roll racing for money (foolish IMO) you could achieve close to 130 mph by swapping the Z51 intermediate gear set to the Base 4.88 versus 5.17 combined ratio. That would get to to 127 mph! Assuming you don't want a Tune to increase the max rpm from 6600 than a simple solution, just use a slightly larger diameter rear tire, somewhat wider or 35 versus 30 aspect ratio!

In fact if you are racing a friend with a Base C8 versus your Z51 they will best you 60 to 130! Especially if they installed slightly larger diameter tires!

SIDEBAR
As far as gas milage driving in Z-Mode versus letting the car use all gear in say MY Mode (I only use those two Dive Modes hardly very use the drive mode **** all done with the steering wheel Z-Mode button. I toggle between the two) I conducted a 1 Tankful test. Used Z-Mode ONLY for a tank full of gas versus driving about the same in my trips, which are ~60 mile round trips to and from Town only using MY Mode.

I tried my best to drive about the same in both. Accelerated from stop signs and achieved about the same high speeds where there are only farm fields both sides of the mostly 2 lane rural roads. In those two tank fills the mpg difference was only slightly more than 1 mpg in MY Mode! MY Mode used all 8 gears and V4. In Z-Mode seldom past 5th and never V4.

 

The formatting on this post is outstanding - so easy to read...

Nice job!

 

Your C8 Corvette Manual Swap Dreams Just Got Far Closer To Reality - The Autopian

 

This is great news, a chance at GM putting out a manual C8. This would likely spike sales at the end of the C8 run but will also likely hurt C8 auto trans resale value.

 

The lack of manual is the only negative that I think the C8 has. But, I don't think it will hurt resale of DCT cars more than what the DCT problems have already done to the car. I just hope GM specs the correct gear ratios for each motor and not just spec the ratios for ZR1+ cars,

 

Overall ratios:
.........................nonZ51 DCT... Z51DCT….. New Manual 6

First gear..................14.23 ……..15.04……....12.536
Second gear.............. 8.61 …….. 9.10………….8.594
Third gear................. 5.97 ……… 6.31………….5.960
Fourth gear............... 4.30 …….. 4.55…………..4.289
Fifth gear.................. 3.18 …….. 3.36…………..3.191
Sixth gear................. 2.49 ……… 2.64………….2.484
Seventh gear............ 1.96 ……… 2.07
Eighth gear............... 1.61 …….. 1.71

 

Hey GM, are you trolling this forum, check out this video, and if you do bring this car to the market, sign me up!

 

Mods, duplicate post please delet this post....
ey GM, are you trolling this forum, check out this video, and if you do bring this car to the market, sign me up!

 

Doubtful considering the VAST majority of C7 buyers chose the automatic trans.

 

I seriously doubt TREMEC would have put in such tall gears if this transmission was slated only for the aftermarket. It looks and feels like a fuel mileage transmission for some future OEM variant that has to meet EPA and corporate fuel economy standards. It sure would be nice to have a closer ratio performance gear option in the Corvette but the nanny state pretty much precludes a mass market car from offering this.

 

There will be no manual conversions until the TCM is unlocked.

 

If 10 to 20 percent of current C8 owners trade for a manual, it may drive down the value of automatic trans cars. It's supply and demand. More Automatics on market could equal lower price.

 

Its probably Tremic engineers are like we have this DCT.... some simple engineering changes (when comparing to a complete new build) can make a valuable asset. make it fit in the same location and bolt up... whom uses it time will tell but with how much LS/LT platform is used in all kinds of kits and stuff, let alone the lack of stick in C8... they make one that WOULD drop in... with very little money invested and open market... worth risk/ investment.

I say the same about a gear set. they have the full design and drawings, making a gear change set for the DCT for aftermarket world would not take a lot.

a C8 with a DCT set up for more of the use and end around a normal 6-7 speed OD... would be FAST with moderat power.

 

The gth gear ratio of the manual and the TR9080 are about the same. The 7th and 8th gears on the TR9080 are for fuel economy. It would have an impact on fuel economy. You'd need that low 6th gear ratio to maintain the top speed (at least with a stock LT2 engine) unless you made 1st gear a lower ratio to get closer ratios.

 

GM cannot justify it. Tremec did. It's no different than a defense contractor developing a capability or system--without a contract for doing so; they're hoping to sell it anyways. For all we know, GM developing the DCT came with a no-touch clause for all of the design for a given # of years. If that recently expired, and Tremec just figured they'd take the existing and shoehorn a 6-speed rowing machine in as best they could--well that's probably a minimal cost to Tremec.

Die-hards will be over the moon. Armchair fanboys who talk a big game about wanting manuals and never buying them--will laud it and won't buy any. And the rest of the car market will view them as less-desirable and worth less in resale. And I do wonder about GM meeting CAFE standards with it; so it may be more of a 3rd-party performance mod than anything you'll see OEM from GM.

I suspect that it won't be a 1:1 swap, but rather you'll end up buying the C8 as it is--and here's a $20,000 package that has to get added onto it. Again, 3rd party retrofit I would guess.

Some people care enough. Other people would rather sell the C8 and just spend the money on something with more badge prestige.

 

The lack of a manual isn't a drawback for the C8, IMHO. Corvette has always been about new tech and performance. Rowing machines are as much of a step backwards as carburation would be. As was stated by the guy who sold his and is going back to a 5BW--it's about fun. And if rowing machine fun is what someone enjoys--that's fine. But it's not something that is inexorably linked to what a Corvette is. There are already cars that are designed, built, and un-updated for years (decades even) because the analog experience is why they exist. And that isn't what Corvette is. Corvette is about economies of scale allowing for the envelope to be pushed forward at reasonable cost--and thus allowing for even greater improvements in successive generations.