Some are saying that engine mods will be more difficult, can someone explain this in more detail?

How will this affect simple bolt-ons like an intake, headers or an exhaust?

 

With direct fuel delivery, cylinders shutting down, rev matching and
more complicated engine computers it's not made to be messed with.
It's maxed out from the factory.

 

Gpec ii pcm

 

From what I have been understanding, they are moving into much more complex territory and modding is going to be very difficult at best. Even down to the exhaust system which has solenoid before the mufflers to balance things for the cylinder deactivation. I also hear that the computer is going to become a lot more tamper resistant on a lot of levels. In GM's eyes, I am sure this is a good thing as they are probably tired of fixing modded cars going for warranty claims

 

Eforce that puppy and I maybe trading my Eforced GS for one..

 

Will be interesting to see if top shops like Callaway, Katech, KPE, LG offer anything. Those guys sometimes are allowed to work directly with GM on set-up.

Given the hurdles to mod the LT1, for me, I wouldn't want just the "average tuner" shop touching that engine. With the AFM, VVT, and defensively set ecm that apparently will put the engine in limp mode if the ecm sees something it doesn't like - I'd want one of the big dogs above touching it, or just leave it stock.

My sense is this will be an engine that will be easy to screw up a perfectly good engine if one doesn't know exactly what they're doing.

 

I would love to squeeze more hp out of the base (supercharger?), rather than pay 40K more to GM for a higher hp model.

 

This is a very good question. The used Corvette market has allowed all classes of people to own a piece of the Dream. Its not that far fetched to build a supercar on a beer budget.

I hope the base model will be upgradable, instead of only the wealthy owners of ZR1 having the bad boys.

 

Just some speculation from a hobbyist that has tinkered. I think the hardest part will be the fuel system. There are no larger injectors available should more fuel be needed. Now we've heard rumors that the stock fuel system is capable of a lot more fuel than what the current motor demands. Time will tell. From what little has floated around mods like air boxes and headers should be adjusted to on the fly. The new PCM is rumored to tune for things like this after a 10 minute learn session. VVT and DoD are probably not much of an issue. The current DoD systems are already circumvented fairly easily. VVT may be more of a challenge but I suspect it will be a matter of changing the parameters it actuates under to never occur in normal conditions. Or the aftermarket could embrace it and make camshafts that take advantage of it. The first examples from shops will probably disable it. Shops Like Callaway and Lingenfelter will probably work with it. The heads are unique to the Gen V, but I suspect that they will flow well enough that the lack of aftermarket pieces will not be a big impediment. The only other big red flag from what little has been mentioned is that the fueling tables are supposed to be very complex and may be difficult to reverse engineer to determine how to tweak them. I will make a guess that there enough smart determined people to find a way to work it out.

The first serious aftermarket examples will probably be a car with an airbox. headers and small cam that the computer can adjust to and work. Because of the work done on the intake and heads I would suspect this will net pretty decent gains. I could see 50+hp. After they have time to work with it you'll see more serious efforts.

So in a nutshell I think the biggest hurdle will be what the injectors can handle and how hard it is to change the fueling. Of course all of this supposes that the PCM is hacked in the first place. And I'm pretty confident it will be.

 

Stock Fuel system utilizing DI, can handle fuel flow up to 1,000+WHP. Tuning the computer will be the difficult part

 

If that is the case then I suspect that initial efforts will be limited by what the PCM can adjust to. I don't remember where I read it from, but I thought an engineer commented the new PCM would self tune a fair amount. So I'll stick with the guess of 50 ish HP being feasible for initial efforts. Maybe more.

Thanks for the info

 

Ya right. LS3 engines are making 500 - 600 HP after upgrading internals and bolt ons. LT1 would have even more potential with Direct injection.

 

I am by far no expert on modding these engines and with this being so different then the LS engine what with the VVT and DI , I think a lot more will be known once the car is in production or once it hits the street.

All the hype on want one of these may be short lived for some if it turns out that there is not a lot that can be done to improve what the factory supplied. Hence the need for the Z06 and ZR1

 

They built a brand new engine! Cast a new block!
So why is it a primitive push rod engine? Low RPM, low HP.

Why not a dual overhead cam, with swirl combustion, four valves per cylinder?

Because it won't fit under the hood.

GM said they want to cater to the euro market and younger people, so with all the rear vents, it LOOKS like a rear engine.

The rear of the C7 has changed not for style, but to accommodate a rear engine.

If they can generate enough money with the C7, the C8 will be rear engine and four wheel drive, and much higher RPM = HP

Did you notice ALL the "money" euro cars have this configuration?
Corvette will want to stop the back end, trying to pass the front end, and compete with the worlds most expensive.

GM openly stated they don't care about us, we are a dying breed, they're moving on.

What are the young millionaires driving, not corvettes.

 

It will be able to be modded. We will be modding ours as soon as we get it.

People thing GM doesnt want people to mod these cars but how many would they sell if they couldnt mod them? A LOT less. I will keep you updated as soon as ours arrives and we start modding.

 

I remember reading that exact same statement in a Corvette
magazine.... circa 1983. We all know how that turned out.

 

I figured you guys would be one of the first to dial this new puppy in..
Good luck to Andy at AA, and the folks at Edelbrock.. This will be exciting!

 

Hey! .....if anyone can do it "THEY" can!

 

When do you expect delivery?

 

They say sept/oct