Power to the People
After that quick tour through the internals on this animal, we return to the dyno room to witness the result of all this assembly work. Even though this engine will be used in a '32 Ford, he retained the stock GM ECU, using a copy of HP Tuners to set up the positive manifold pressure fueling. One important aspect of this tuning includes ensuring that the fuel pressure is boost-matched to the manifold pressure. This usually means at least 1 psi of fuel pressure for every 1 psi of positive manifold pressure. This is required to maintain the original fuel pressure in the manifold. Generally, the LS engines run at 58 psi. So at 18 psi of boost, the fuel pressure ascends from 58 psi to 76 psi.
This is the stock supercharger inlet cover, while on the left is a new billet piece develo
This is the piece installed on the engine.
Match the improved blower efficiency with really good cylinder heads and you have a recipe
With the fuel and spark maps tuned, Duttweiler landed on 26 degrees of total ignition timing as the peak power number. This may seem like a small number compared to the old days of small-block Chevys requiring 40 degrees of lead. What this really indicates is excellent combustion chamber efficiency. Basically, less ignition timing means the engine can initiate the combustion process later and still maximize cylinder pressure at around 15 degrees after top dead center (ATDC) where the piston can exert maximum leverage on the crankshaft. Lower total timing numbers also reduce negative work because the engine doesn't have to expend energy to overcome increasing cylinder pressure in the combustion space approaching TDC. To reinforce the idea this is a great street engine, Duttweiler also checked the leak-down after two whole days of abuse and dozens of dyno pulls and saw less than 1 percent leakage from the Total Seal Gapless rings.
Often, a big inlet port can suffer from weak flow numbers at lower lifts. But these WCRCH
As you can see from the dyno curve on page 22, this engine makes some astounding power. Let's start with 900 lb-ft at 3,600 rpm. This massive torque means you don't need nearly as much torque converter stall speed to get the car moving or nearly as much rear gear as leverage to accelerate the vehicle. We plugged this power curve into the Quarter, Pro dragstrip simulation, and with a 3,500-pound car with a 3.31:1 rear gear and a TH400 trans with a 3,000-rpm stall speed converter (assuming you can hook it up—our simulation showed tire spin all the way through the 60-foot mark), we saw 9-teens at 151 mph. That is some serious acceleration and fully capable of sub-9-second times. Plus, best of all this combination would fit under all but the lowest hood line and does not demand all the custom plumbing of a pair of turbochargers. Sure, the Magnuson kit is expensive—but look at the power you're making. Folks, the days of a 900hp street engine are here and bangin' on the front door. Better let 'em in!
WCRCH-Ported All-Pro Head Flow
*BSFC is an evaluation of how efficiently the engine uses fuel, expressed as pounds of fuel per horsepower per hour, or lbs/hp-hr. Generally, a normally aspirated engine is very efficient at 0.450 lbs/hp-hr. Roots style supercharged engines always exhibit higher BSFC numbers because they require additional fuel to make power to drive the blower. In this case, at 20 psi with a 2.3L supercharger, it requires roughly 150 hp to drive the blower. This means that the engine was actually making around 1,165 gross horsepower. The engine also makes 2.61 hp per cubic inch.
The West Coast Racing Cylinder Head LSW-2 67cc chambers are fully CNC’d and fitted with 2.
Of course, a strong set of heads also means you need to ensure the valvetrain can handle t
Part of the key to any strong engine is a rotating assembly that can handle both high powe
The Diamond pistons offer a significant dish to reduce the static compression down to 9.53
Left Coast 32 also markets these innovative RIP (Race Inspired Pulleys) blower pulleys tha
Duttweiler says he pulled 11 degrees of timing out of the engine to run this same combinat
West Coast Racing Cylinder Heads
Total Seal Piston Rings
Granatelli Motor Sports
1000 Yarnell Place
Leading Edge Performance
23003 Diamond Drrive
All Pro Aluminum Cylinder Heads
1985 Cedar Bridge Ave
Left Coast 32