Very interesting. I guess now we know what Arin was sworn to secrecy about for the past year. The lead order they were piggybacking on was from GM. Wonder if the new CTS-V will follow suit.
“The new 1.7L Eaton R1740 TVS supercharger spins at up to 20,000 rpm - 5,000 rpm more than the supercharger on the Corvette ZR1’s LS9. The rotors are shorter in length, too, which contributes to their higher-rpm capability - and enables them to get up to speed quicker, producing power-enhancing boost earlier in the rpm band.”
Man, Detroit gets all the cool shit! After seeing the normal Corvettes being made I am willing to bet that the new Z06 will be kickass.
The Washington DC Auto Show is coming up shortly and so many manufacturers have pulled out of it that I am not going to go because it is a waste of time.
Read that this morning, and it seems incorrect. On the models :
The 1900 Rotor length is 202mm.
The 1740 Rotor length is 236 mm.
The shorter rotors do support higher RPMs. Its related to stiffness, larger diameter of the 1900 helps too.
Eaton RPM limit is about the bearings. It is 18,000 RPM sustained. You can run them higher than that for intermittent periods, but you burn the candle faster.
"The new 1.7L Eaton R1740 TVS supercharger spins at up to 20,000 rpm - 5,000 rpm more than the supercharger on the Corvette ZR1’s LS9. "
This could be talking about the operating point for the charger, since a smaller charger needs to spin proportionally faster to make up the same airflow.
“The rotors are shorter in length, too, which contributes to their higher-rpm capability - and enables them to get up to speed quicker, producing power-enhancing boost earlier in the rpm band.”
This first part is incorrect. They do spin faster due to sizing. The 1900 in the ZR1 can endure higher rpms ( shorter, and stiffer rotors ) .
The second part is correct. Smaller rotors, spinning faster will get to boost earlier. There is no Lag in a roots style system, but the TVS does not pump its full capacity at lower rpms ( look at Vol eff vs speed ). The flip side is that the ZR1s charger is more efficient by a good amount isotropically. ( lower discharge temps ).
Interesting. That should make for a killer Z06. And the new corvette line in general looks killer. I’d seriously consider one of the new body style vettes as a toy car in the future. You know after a couple of year’s they’ll depreciate like crazy as every non-z06 vette does, plus the domestic aftermarket support is pretty killer.
Times are changing fast…first porsche with the GT3 losing it’s identity from the base 991, now the Z06 looking like a hopped-up base model too. And both shipping with automatics! Jeez.
Already when it leaked in December that the Z06 it would have a supercharged LT1, a lot of corvette fans balked. Those guys mostly shunned the ZR1 even for the Z06, especially the ones I’d meet at the track. But the writing was on the wall, if a directed-injected 427 LT1 was coming, everyone would have known.
Bow your heads for the LS7, we’ve probably seen the last production-verson 427…it’s weird. no 427…Automatic…this isn’t the track-day guys car anymore, is it?
FWIW I’m now curious as frick what the compressor map of the 1740 looks like. It seems like applications are drying up for the 1900, funny how that worked out.
Also funny that a Z06 will cost, what, about $25K more than a base C7, puts the 1740 cost into perspective considering all the other goodies you get with a Z06.
If only we could delete the camaro lights and those weird squiggles back there I’d be with you.
Guy in my office ordered one. When it came close to delivery , he called and cancelled. Couldn’t get over the ‘Corvette Guy’ stigma. I thought that was pretty funny. The fact that he ordered it in the first place was pretty compelling for the new C7…this is someone who would NEVER have thought about a vette, ever.
What I find interesting is that they’re maxing out the 1740 from the looks of it. APR is pushing it pretty hard…basically to the warranteeable RPM limit and APR developed 525 whp / 490 wtq on the RS4 4.2.
GM is claiming around 625 hp / 635 tq. That’s gotta be 550 whp/550 wtq on the RWD vette, even with an automatic 8 speed.
Has anyone said what it weighs yet? Imagine the APR RS4 on a 700 lb diet.
Must be able to throw down a 10.6 @ 130 on the street tires. Will be fun to watch.
Yea, I think thats exactly what a lot of people are thinking. Not saying I could pull the trigger either, but first time I’d ever really consider it.
Plus even the base model posts some pretty damn impressive numbers for a base price of $53k (more like $60-65k after options obviously). But the base model corvette was never really even in a relevant conversation with the M/AMG/S model cars as far as performance before now.
This is more positive press for apr. The 1740 unit continues to prove it’s the best tvs blower for the rs4. It would be interesting to see what is left on the table.
Weights were a little north of 3400 for the manual version. Car looks cool, they are trying to appeal more to the general public and he out of the stems they are in IMO. Makes me question the point of the ZR1 at this point though.
so it’s 200 lbs heavier than the prevoius one? That’s too bad. Wonder if the C6 Z06 was understated weight wise at 3200 lbs.
Even still at 3400 for a manual, probably 3500 for an auto, you compare that to around 3900 lbs for a supercharged RS4 , with both cars making the same power,you’re looking at a paradigm shift power to weight wise.
Only the die-hard corvette guys, which is usually the older crowd shuns the idea of a forced induction corvette. Most of the C6 crowd that actually takes their car to the track and mods it is 25-35 years old, and all of those guys are head over heals over the idea of an FI vette. Then there is the issue with the automatic in a Z06. There will be two people who buy an auto Z06, old people who will never got on it or use the car anyway, and track dogs that will build the trans, do something crazy with power adders, and run nutty times at the track. Auto ALWAYS rules at the 1/4
Imagine how fast these things will be with pulley/headers/tire/E85???
pulley - not much faster. They’re already pushing the 1740 pretty hard as we’ve heard in the press release. This is a 1740 making 625 hp stock. It’s not making 500 hp…or it’s not a 2.3L
headers - who knows. who is to say the stock exhaust will be restrictive? Considering the need to evacuate gases and the fact they’re pushing the blower pretty hard I’d say it will come well set up pretty well. It’s also supercharged so exhaust won’t be the game changer it might have been on an NA car with a somewhat restrictive setup.
tires - huge gain in the first 100 feet for sure
E85 - will definitely help cool things down and allow you to push parameters
These cars are always restricted from the factory. The headers that come from the factory leave a lot on the table down low. I wouldn’t be surprised to see mid 10’s in a stock vehicle. Iirc the c6 record is a 10.9 and 10.7 with DR.
