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On a stock motor the kit will add amazing horsepower on a low boost setting of 8-10 PSI. Packing List of Included Kit Items[2x] Turbochargers w/ Internal Wastegates[2x] Stainless Steel Turbo Manifolds[2x] Oil SS Feed and Drain Lines
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Use left/right arrows to navigate the slideshow or swipe left/right if using a mobile device Have you heard the legend about making 1,000 hp for $1,000 using eBay turbos? It's true. Well, parts of it are. We were able to buy a complete twin-turbo system that will bolt on to your near-stock small-block Chevy for very little cash and make more than 600 rwhp. The problems lie in getting it to fit in your engine compartment and watching the tune-up so you don't scatter the parts. When we hatched this scheme, we wanted to know the truth about the lowdown $150 turbo. At Car Craft, we don't listen to speculation-we blow up parts ourselves so you don't have to. The following is a firsthand, actual test and fitment of the cheapest of eBay turbos. Since there are many variations of manifolds, turbos, and accessories, we tried to select parts that represented the average you can buy every day. Using an eBay gift certificate, we bought turbos, headers, piping, and all the other ancillary parts, and with the help of Ted Toki, George Diagne, and Eric Solomon at Westside Performance in West Los Angeles, California, we installed it on Toki's '55 Chevy for some testing. At the end of it all, we discovered that this is far from the best system you can buy, but it is a great way to get involved in the stupid power of a turbo system. When you do this, be sure to have fun and expect to make something explode in the name of science. We did. The Car See all 31 photosHere is the payoff: nearly 600 rwhp and the wheels off the ground using pump gas and a set of $150 eBay turbos. Toki's '55 ran 7.20s with a low 90 mph, indicating there is more speed with fuel and tuning. The Mill The Turbos There are external wastegate versions available, but that added the cost of two wastegates to the total, and we wanted to spend as little money as possible. This is the same reason we didn't buy an intercooler. They're good-we just didn't want to spend the cash. We're going to tell you up front that the external wastegate design is a lot better. More on that later. See all 31 photosIt's no secret that the compressors are designed for a four-cylinder engine. The canister on the upper left is a boost-referenced wastegate control. When the boost overrides the spring, a percentage of boost is diverted to the exhaust. The Manifolds Carb The Baseline 437 RWHP/489 LB-FT Those boost numbers may seem like a good thing, but they're not. Too much boost forces the boost-referenced regulator to add equal amounts of fuel pressure, stressing the system. It also required us to back down the timing to 18 degrees total, a move that kills power and driveability completely. That much boost without enough fuel to feed it and not enough octane to prevent detonation is the fast way to blowing up everything. Another problem with an inadequate wastegate is the overspeeding of the turbo itself. We're going to argue that buying inexpensive turbos and spinning them to their maximum speed is asking for trouble. Since the untouched baseline for these turbos spins them hard, we're going to say that part of the reputation for flying parts and flameouts comes from too much rpm, so the first thing we did was slow them down and keep the engine below 6,000 rpm. Sadly, if you look at this in terms of the system as a whole and the ultra cheapness of the parts, it was a failure. The only way to make this base system work is to run race gas and virtually no timing and risk overspinning the turbos and destroying the engine. The combo is also going to create a lot of exhaust temperature and crappy driveability. Wastegates 442 RWHP/445 LB-FT See all 31 photosThe drain for the oil feed is -10 line plumbed into each side of the oil pan using a bulkhead fitting. Solomon set the height by filling the pan with water to simulate 5 quarts and drilled the hole above the line. A clogged or slow drain will force oil out of the shafts and into the turbos. Boost Controller 493 RWHP/515 LB-FT High-Octane 596 RWHP/642 LB-FT Next Time The next steps for the '55 are a larger-diameter exhaust pipe to kill some of the backpressure, an intercooler, and a set of upgraded turbos to give us a cooler charge with less of a chance of grenading parts due to overspeeding. It will also give us more power, which is always a good thing. Who You Gonna Call? See all 31 photosIn a radical move, Toki moved the master cylinder to the floor to make sure everything cleared the firewall. We'd recommend modifying the exhaust manifold first. PARTS LISTDESCRIPTIONSOURCEPRICE-10 AN oil drain-back flange (2)eBay$19.902.0 to 2.5 90-degree intercooler intake silicone (2)eBay39.902.5-inch straight intercooler silicone coupler kit (2)eBay59.903.5 to 4.0 turbo intake reducer silicone couplereBay19.953-inch V-band flange kit (2)eBay49.9850mm blow-off valveeBay75.00Nissan Sentra 92 to 95, 2.5-inch intercooler pipingeBay61.00T3/T4 hybrid turbocharger (2)eBay298.00Twin-turbo exhaust manifoldeBay99.00T-bolt clamps (14)eBay42.00Blue fuel pumpHolley131.95Boost-referenced regulator PN30-1803Quick Fuel75.00-10 AN oil drain-back fitting (2)Summit Racing49.90-10 bulkhead fitting (2)Summit Racing29.90Spectre Universal modular air intake plenumSummit Racing75.00ACCEL 276 spark plugs (8)Summit Racing23.60-3 oil feed (brake) lines (2)Westside50.00-4 threaded oil feed flange (2)Westside34.00-4 oil feed coupler (2)Westside10.004 feet of -10 AN lineWestside48.00Base System Cost1,291.98Ultra Gate 38 wastegates (2)TurboSmart599.98Boost controllerTurboSmart89.99Total System Cost1981.95 Can you turbo a 350 small block?So, there's not just one type of turbo kit that works best for all SBC 350 engines unilaterally. That being said, here are some of the turbo kits that are commonly used for different types of SBC 350 engines: RoadKillCustoms Small Block Chevy Twin Turbo Kit. CXRacing GT35 Twin Turbo Kit For Small Block Chevy SBC.
How much does it cost to turbo a 350?The cost of a Chevy 350 turbo kit varies widely—anywhere from a couple hundred dollars to a couple thousand, depending on what exactly it is your looking for. Supercharger kits, on the other hand, will cost a good deal more, as they tend to range in price between $3,000 and $5,000.
How much HP will twin turbos add?How Much Horsepower Does a Twin-Turbo Add? A twin-turbo can add anywhere from 100 to 250 horsepower to your engine. This is a great way to really boost your engine's power and help you achieve some impressive speeds. A twin-turbo can also be great for your fuel economy and help you get the most out of your engine.
Are twin turbos worth it?Despite some drawbacks, twin turbos are still excellent kits. Twin turbos are fantastic for the daily driven or mostly street-driven car. Each turbo needs the exhaust from only 4 cylinders to spool, so it spools much faster than a single kit.
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