0HinsonSuperCars

Our customer came in with a 2013 C6 Convertible LS7. The car is bone stock down to the air filter. Maximum boost was 5 psi. The Edelbrock E-Force kit installs very cleanly! Give us a call today to get your E-Force kit on the way.

540 rwhp
518 rwtq

What a perfect way to void a warranty!!! Or buy the second warranty from Edelbrock! Let us know how we can help with your Corvette needs!

ncvette_1FUNRIDE

That is not a Grand Sport. It is a 427 convertible.


Looking good though.

0HinsonSuperCars

Your right that was my mistake in the original post. Corrected now.

Dano523

So much displacement, so little gain with a blower!!!!

You can get about the same levels out of the LS-2 with an Efrce, since you can run higher boost levels with that motor.

The trick to boosting the 427, drop the compression pressures levels down first (thick head gaskets), then bring it back up with the boost instead. Done this way, you can ramp the boost up to start pulling around 750rwhp instead.

0HinsonSuperCars

Your correct in saying this but we wanted to post gains on this motor as nothing more than a drop it in and run the numbers and see what it makes.

tealex

Numbers don't mean much without knowing what they were before the install.

whiteboy

427 = 505 hp -15% drive train loss = approx 429 rwhp
That 540 rwhp on stock engine with only 5psi boost sounds pretty good.
A good comparison would be an Magnason on the same engine?

JoesC5

Most LS7's are seeing ~11-12% driveline loss, so 505 bhp =~445/450 rwhp, not 429 rwhp. That ~541 rwhp would then be at around 608/615 bhp(calculated at 11/12% driveline loss). That's a ways off from Edelbrock's claimed 657 bhp for the LS7's E-Force.

I would expect the rwhp would be somewhere around 578/584 with the E-force.

Here is a before and after graph from back in 2011 of the 657 bhp E-force on a stock LS7.

x88

Interesting. I went all motor on my Z06 cam and WCCH heads made the exact same numbers! 540/518. Nice numbers for only 5psi

thatonedude1

Modest numbers, but at least you won't have to worry about blowing it up with such light boost pressure. I'll bet this runs like a ***** cat when going easy on the throttle.

It appears that the big 427 is a bit large for this blower, which is why you can make similar numbers with the LS2 or LS3. While max boost is 5 psi, I'll guess that boost above 5000 rpm is more like 3 psi

lordofwar

cost of install with parts?

0HinsonSuperCars

Here is the link for the various E Force kits depending on your particular application. the install is pretty straight forward taking about 8-10hrs without any special tools. Its something that someone with pretty good mechanical knowledge and skill could do in a weekend more than likely. Then of course you have to tune the car.

not08crmanymore

You don't say how much boost you're running.At 5psi that number isn't bad and the whole drivetrain can probably handle it with no issues. Personally,I think 75-100 rwhp gain ain't bad!!

Dano523

TVS 2300 with a 2 3/4" pulley should be around 800HP on a stock 427 (spin the unit any faster, and you are just creating more heat instead)

Figure your already into the install with unit for around $10K, don't see the holdup of adding another few hundred dollars to pull the heads, and drop compression via thicker head gaskets while you are that deep into the motor already.

0HinsonSuperCars

Its all in what the customer wants to do. We provide the information to them and let them decide.