Which is why you can pay extra to a Hennessey camp or Callaway to provide the warranty that GM voids.

 

Hennessey will also be testing an ECS kit out very shortly. It takes time to get these kits into a mass produced level, it's no where near as easy as many think it is in my opinion.

 

You totally missed the point of the post.

They PURPOSELY designed the LT1 at a lower maximum capacity.

You made the false assumption (out of ignorance) that they increase fuel system capacity for the Z06 because LT1 system was inadequate because of an unforseen issue in the development process. As if they were targeting to use both fuel systems for the same car. That was never the case.

Your hero Tadge isn't ignorant (again, you make some retarded assumption about me saying he is, which I never came close to doing), he designed them different on purpose. There wasn't a larger fuel pump and injectors put in the Z06 because the LT1 hardware was accidentally not good enough. It was intentional.

Hence, why I say that your assumption that the Z06 fuel system capacity was increased because of inadequacies in the LT1 is completely ignorant. The LT1 fuel system was never intended to support the Z06 engine, and was designed at a lower capacity on purpose.

 

I'd venture to guess that anyone that can afford a 60K+ car and then put 10K+ into it for a supercharge could really care less about a warranty !

 

I don't know what you are reading, but I read JoeC5's post as saying the LT1 fuel system was designed for the LT1 and its capacity (as well as over capacity). I see nothing that stated that it was a problem within the LT1 and that therefore a new system had to be designed for the Z06. Of course, a FI, larger-HP/TQ engine needs a different fuel delivery system.

Here's his post; where do you read it's a problem in the LT1?

"I'm in the "wait and see" camp on this issue. GM must have felt that there was an issue with the fuel supply, as they designed and built a special larger displacement fuel pump with higher fuel line pressure to handle their Z06's 625 HP(est)."

 

You're a complete moron. Seriously.


Your sarcasm is also childish and distasteful.

There are no issues with the LT1 pistons, rods, crank because they were never intended to support a factory warranty 625 hp car. The fact that they will still run reliably at 650hp is because they make the components stronger than necessary to avoid paying out replacement parts in droves for failing parts for dishonest customers trying to backdoor their warranty on them when they return the car back to stock form before taking it into a dealer trying to get a bent rod or fried piston replaced under warranty. With today's technology, it's easy and affordable to make parts much stronger than necessary to avoid extensive warranty claims that could arise, whether they are legitimate failures on a stock vehicle or otherwise.

Just because GM doesn't use the same bottom end, it also didn't mean there are issues with the LT1. The LT4 will probably handle 850 to 900 horsepower without making. The 5.8 liter GT500 does.

There's no "issues" at all, implying there is some sort of problem with the car not being strong enough to handle a blower. The LT1 can. Every damn performance car can, every C6 Vette handles significant horsepower increases reliably without changing the bottom end. The LT1 is no different.

 

 

Right there.

Regarding supercharging an LT1, which is what this thread is about, it has been proven there is no issues with fuel supply at 600whp (675 crank +/-), albeit it is close to what the fuel system can actually support.

The Z06 fuel system, of course is increased in capacity as you said, to run at 625+ hp and NOT be close to maximum fuel capacity.

The LT1 can do 625+ hp, getting close to full capacity.
The LT4 can do 625+ hp, not getting close to full fuel capacity.

Either way, there is NOT an issue with the LT1 fuel system providing fuel for a supercharged application at the 600whp range. It's fine and capable.

 

Again, agreed.

As I posted in the other thread, the LT4 is a different platform that will scale accordingly.

Some of these arguments are just getting silly.

Can you safely get an LT1 to 600whp? Yes. Can you get it to 800 safely without changing out nearly everything? Nope.

Can you scale an LT4 to 800whp safely? Probably so. End of story.

It's scaling, and let's leave it there.

 

Generally in boosted applications it pays to run forged piston and rods. The fact that GM added these to the LT4 is simply to give them more breathing room with regard to engine failures. The LT1 has shown that the rods, crank, and pistons are good up to ~700hp. LMR and I believe several others have made over 700 with spray. I don't think it will last long doing that on non-forged pistons but we'll have to wait and see. As for the LT4, going forged pistons significantly decreases the chances of a failed engine. Pistons and rods are generally the first things to let go in high hp application running lots of boost. I've seen guys with blown holes in the tops of cast pistons before trying to run too much. The forged piston gives GM the added protection. You also have to remember that these motors are running a pretty high compression ratio. Generally I've always run low compression with boosted applications, hell I was running something like 9:1 compression ratio on all forged bottom end on my turbo mustang with 26lbs of boost. That car made over 1000rwhp.

 

just sent a set of headers to Hennessey yesterday for that kit you sent

 

Edelbrock makes a supercharger for my Z06 with 657BHP and Callaway sold Z06's with a Maggie with 652 BHP. I would not be afraid to install a Edelbrock e-force on my Z06 with it's 11:1 CR cast pistons.

The reason I wouldn't hesitate on the Edelbrock is because I don't beat on my cars. I don't track my Z06 and while I will go WOT ever so often, I don't hold it at high RPM's. In that use, the cast pistons will hold up fine at around 575 whp.

But GM wasn't concerned about having to replace my LS7 while in warranty if I put a supercharger on it. They were concerned for the ZR1 so they used forged pistons at a much lower CR.

If GM thought the LS7 was a good platform for supercharging they would have thrown the TVS2300 on it for the ZR1 instead of developing a new motor(LS9). Just because I personally could get by running a 657 BHP LS7 without blowing up the motor doesn't mean it would live if I were beating on it every time I took it for a drive, especially on the track. GM knows that other drivers don't necessarily have my restraint, so they have to design their products for them also.

Sure, GM designs in a safety margin, as does any engineer, whether it's an automobile engine, a bolt holding the lower control arm, or a skyscraper. When you start exceeding the original design and get further into the safety margin, the more likely you will see a failure.

How far are you willing to go into the designed in safety margin?

 

Good to hear, which headers will be used?

 

Of course...GM engineers just wanted to complicate things....Everyone knows that the aftermarket is smarter and has better engineering talent...

I havent heard of a single supercharged c7 blowing up, and they've been on the road for almost 2 months....So they must be reliable....

 

 

Lots of weird hostility in this thread... guess I'm confused as to why.

Some people just want to argue at the drop of a hat.

 

Kooks Ceramic Coated

 

Let's stop with the personal attacks (Please!)! Really not necessary in order to get your point across.

 

I do not understand why the discussion. The C7 has a brand new motor and as Doug already stated making forced induction work is not an easy task.

Just as improvements were made with forced induction on the previous generations of Corvettes so to will there be improvements with the C7. The car has only been out since the fall. The tuners need some quality time to work out the details so that the longevity of the components can be maximized.

 

As a point of clarification, the GM Powertrain Warranty is not voided or otherwise blocked with Callaway.

Callaway is the only company with this arrangement with GM, and our warranty is peerless in coverage, and actually worth much more than the paper it's printed upon NOBODY else can honestly say this, period.

www.callawaycars.com