Enter the LT4 crate engine. Power comes on fast: a 1.7-liter Eaton supercharger spins at 20,000 rpm to force 9 pounds of boost into this 6.2-liter engine. That results in the same 650 horsepower and 650 torques you’ll find in the Z06 that’s sitting over at your local dealership, but for a fraction of the price.
Speaking of tires, they do absolutely no good if side to side movement with low pressure causes them to slip off the rim. Being in the middle of nowhere with rubber out of place and no way to change it is an awful situation. However, there are already bead lock rims on the market to prevent this exact problem.
Put it all together and you have the monstrous mill that propelled the 2009 ZR1 to 60mph in 3.2 seconds, 100 in 7 seconds, and covered the quarter mile in 11.3 at 131 mph. Keep in mind this isn’t the spec list for a 2013 Gallardo, this was a 2009 Chevrolet Corvette. An all-aluminum supercharged V8 in a 200-mph American car that was faster than a GT-R, in 2009.
That’s right, in the GM Performance Catalog of crate engines an 8-liter V8 is considered “small”. With max revs set at just 4500rpm, the Vortec 488 is a mill designed not to power the car you’re racing, but the truck you’re hauling it with. With 375 horsepower and 475 lb-feet of torque on tap at only 3200rpm, the 488 can tow that high-dollar enclosed trailer without breaking a sweat. Or it could pull your boat, your cattle, your neighbor’s house, or the grandstands at your local dragstrip. You get the idea.
Forged steel rods. Forged steel crank. Forged aluminum pistons. Aluminum heads. Mechanical roller cam. Huge valves. A 7100 rpm redline. A massive 13.1:1 compression ratio that’s well into diesel territory. It all combines to make 776 horsepower, 649 lb-ft, and a whole lot of noise from its 7.4 liters of absolute fury. I’ll let GM explain what that all means.
With bigger tires and heavier rims on your list of Jeep mods, the stock gear ratio may not be enough to get you where you want to go. This is where changing the gear ratio comes in handy and reduces unreasonable stress on the engine. If the wheels are too tall for the stock gear ratio, there will be a noticeable power drop off from its stock build.
In fact, at highway speeds, the Grand Caravan is one of the noisiest used minivans around. The engine and transmission noise in the cabin can drive you insane if you ride long enough. When you throw in the wind and road noise that join the cacophony, you can see why this used minivan should never leave town.
Surely you’re aware of the C7 Corvette. You know it’s a huge leap for Corvettes. You know that valets go joyriding in them. You know a manual Z06 did the Nurburgring in 7:13.9, making it the fastest factory Corvette to ever lap that track. You know that with a little fiddling the C7 Z06 can exceed 200 mph. But did you know you can buy the beating heart of a C7 Z06 and put it in any car you want?