REACTOR111

Anyone heard if Katech will have a 427 LT2 ready to go when the C8 hits the ground?

Katech_Zach

I think building the engine will be the easy part. Once tuning is unlocked we can do it.

Red Mist Rulz

Given that no one outside of GM has access to an engine, I'd be very surprised if anyone has signficant mods "ready to go."

RapidC84B

Going to be interesting who gets the keys to tune the car and how GM manages that program.

RussM05

From the info I've read, Jason is correct. And if anyone knows how to mod the LT2, Katech should know but I mean no disrespect to the other top tuners.

Mechanically, the difference between the LT1 and LT2 isn't really very much. Stock cam is slightly different and the intake manifold. There are the additional oil scavenging pumps they have to deal with. But to bump displacement up to 7.0 would seem pretty much the same as a LT1. I would love to see the result of a build where the peak power is in the 7,500 rpm range!

Until their team gets their hands on the ECU and figure out what's different, its anybody's guess when or if it can be done soon after release of the C8.

But can you imagine what the car would do with 100+ more HP? Yikes!

40YRW8

I have always been a fan of larger, normally aspirated engines. The LS7 prompted me to buy my first Corvette and I still daily drive my ‘07 Z06. Anthony, please use whatever lobbying power Katech has for GM to produce a LS2 based 427 the way they did for the LS7. Maybe a LS8? Ok, how about a large bore, shorter stroke DOHC 400 with titanium rods, valves and a 7500 red line? I would love to see a lightweight C8 Z06 built with the same philosophy as the C6 Z06. Give me high torque AND light weight.
Stealthtitanium
PS if you extrapolate a LS2 out to 427 cubic inches, you get a smooth, efficient, emissions-legal 560 horsepower and 553 foot pounds of torque without the weight and cost of a supercharger. Don’t flame me. Just dreaming.

RussM05

I could not agree more.

I'm sure the engineers at GM have thought about the same thing and would love to do it. But the business model (i.e. total cost to unit sales) has to make sense. I'm sure GM can build a car like this, but if the MSRP is $140,000, the number sold will be a few hundred maybe a few thousand over 5 years. From a business stand point, it would be a difficult sell to senior management. That is why GM just mounts a big, cheap supercharger on the LS/LT and calls it a day.

Hib Halverson

Indeed.
Ya think?!
Apparently, the 2020 Stingray uses the same E99 engine controller as did the '19 ZR1 but, on C8, the E99 is integrated into GM's so-called "Global B" electrical architecture which, reportedly, incorporates additional levels of encryption. The Cadillac CT4 and CT5 are the first and second GM vehicles to use "Global B" and the C8 is the third. My guess is it's going to take a little time for the folks at Katech to "unlock" the E99 and then start developing cals for a 7.0L LT2. Yet another layer of complexity which could make calibrating a modified LT2 a challenge is GM's use of wide-band O2Ses in the engine's combustion controls.

Hib Halverson

I believe it's unlikely that anyone outside of GM "...gets the keys to tune the car". I believe the days are gone when purveyors of aftermarket calibration tools (HPT, EFILive and etc) could gain insight how a particular GM engine controller is programmed via information leaks or other "backdoor" methods. With the coming of technology such as autonomous vehicles and over the air calibration updates, the levels of encryption car companies are going to use to secure their systems are going to be extensive and are going to be based as much on risk management as they are going to be based on keeping calibration methods proprietary.

RapidC84B

Tadge is on record saying they are coming up with something, and that they have no intention of completely killing the aftermarket. He would not provide any more details. The logical answer is a "tuner access" program of some kind facilitated by GM.

fatsport

Is the cam different? I didn’t know that anything internally was changed. Looks like and intake and headers brought the torque curve further up the RPM range. Don’t need to change the cam to do that.
I think porting the heads and adding E85 would make an awesome car. Pray Performance (and others) are getting 500 (575 crank) to the wheels with the LT1. Break into the ecu and let it rip. With the low gears the car would be a rocket.

BeastBoy

Yes the cam is different, exhaust valve lift now matches intake.

RapidC84B

Unique block, all new dry sump with 3 scavenge pumps, new cam with more duration and lift, all new manifolds, new DOD implementation.

PRE-Z06

I remember seeing an article that had specs posted though can’t find it now, this one says more duration as well...
https://www.roadandtrack.com/new-car...nalysis-specs/

jamesc1123

We need HPTuners to get some time with Google's Quantum Computer, those are theoretically supposed to be great for current levels of encryption. Bang, big cams and bigger displacement are only a technical revolution around the corner.

Dominic Sorresso

I believe aftermarket tuners are a significant part of the overall OEM marketing strategy for vehicles like Corvette, Camaro, Mustang and Challengers. SEMA is huge and I don’t see the OEMs looking to kill that. However, I wonder how the aftermarket will adapt to the drive towards electrification.

JerryU

Yep, slightly.

Ragtop 99

Would have liked more than 4* on the intake. 10* would have been better

PRE-Z06

I’m surprised they added any with the climate change that’s causing the imminent end of the world soon, seriously though with the 18* extra on the exhaust side I don’t understand why they didn’t let it rev to 7k as that bigger split helps carry the power past peak and the shift/rev limiter is right after peak currently?

JazzVA

Is it possible the standard engine controls could adapt to a larger camshaft? If the computer can't be jailbroken is that a possibility?