Are LT1 and LT4 heads the same?
The LT4 has 1.6:1 and LT1 has 1.5:1 Rocker Ratio. The LT4’s new valve springs are made from egg shaped wire for higher seat pressure and improved valve dynamics at higher RPM. The big difference in the heads is the intake and exhaust ports. Both are larger with bigger radius bends.
Does porting heads add horsepower?
To properly analyse and validate the job, a head should be tested first on an air flow bench which measures the volumetric flow rate (how much air is getting in and out of the head). This will give a base figure to compare to once the head has been fully ported and polished, leading directly to a gain in horsepower.
How much horsepower is a LT4?
The LT4 features a 1.7L Eaton R1740 TVS supercharger, which spins at up to 20,000 rpm. That’s enough to generate more than 9 pounds of boost and help produce 640 horsepower and 630 lb. -ft. of torque.
Will LT4 heads fit LT1?
LT4 heads do lot mate to the LT1 manifold, it’s a different bolt pattern. GM Perf makes ported heads for the LT1.
What is the difference between LT4 and LT5?
The LT5’s four-lobe compressor rotors are larger in diameter and longer with a tighter 170-degree helical twist than the LT4’s 160-degree rotors. The LT5 produces 14 pounds per square inch of boost, compared to the LT4’s 9.4 psi.
How much is a LT4 crate engine?
Prices for the manual LT4 Connect and Cruise systems are $25,186 and $26,365 for wet sump and dry sump respectively. All the LT4 crates engines are backed by a 2-year/50,000 mile warranty for better reassurance if things go south.
How much does it cost to port a set of heads?
That could be a $1,000 question, if you go the fully ported route. On the low-end, you’re looking at around $200 for a professional three-angle valve job with the existing 1.94/1.50 valves. Add bowl-porting and a set of big valves and you move up into the $500-$700 range.
How much HP does the LT1 really have?
Corvette, the Small Block V-8 and LT1
|1970 LT-1 (Gen 1)||2014 LT1 (Gen 5)|
|Camshaft type||solid lifter||hydraulic|
|Fuel delivery||four-barrel carburetor||direct injection|
|Ignition||transistorized with cam-driven distributor||individual coil-on-plug|
|Horsepower||370 @ 6,000 rpm||450 (estimated)|
What cars have the lt4 engine?
GM 6.2 Liter Supercharged Small Block V8 LT4 Engine
|Displacement:||6.2L / 376 cu. in.|
|Vehicles:||Cadillac CTS-V, Chevrolet C7 Corvette Z06, Camaro ZL1, Cadillac CT5-V Blackwing, Cadillac Escalade-V|
|Introduced:||2014 model year|
|Predecessor:||LS9 / Gen 4 Small Block|
How much is a brand new LT4 engine?
How much does it cost to port cylinder heads?
How do I get more horsepower out of my LT4?
How to improve performance of LT4 supercharger engine
- LT4 Supercharger Engine. The LT4 is an engine produced by General Motors for use in ultra-high-performance vehicles.
- Replace LT4 supercharger lid.
- Replace Air Filter / Install Cold Air Induction.
- Pulley Swaps.
- Performance Exhaust.
- Performance Tune.