$450 chinese turbo and 600 plus HP(food 4 thought)

tooslow said
Hypothetically speaking, lets say you had the wrenching skills necessary to build a 600hp rat motor for $6700. With the astounding airflow potential of today's conventional Cylinder heads and the multitude of dirt cheap rotating assemblies cluttering up the Summit catalog, this caliber of HP per dollar heroism is certainly attainable----try hard and you could even do it with stock heads. Even though that would qaulify as an impressive budget build by most standards, how many people have an extra $6700 to throw around on anything let alone an engine, these days?
While that concept is like so cliche, we're serious about turning up the wick on dollar stretching performance. How does a junkyard 5.3L small block boosted to 550HP with a do-it yourself turbo setup built for $3089 suit your fancy? ieHOTROD

That tally includes a tuned factory computer, a wiring harness, bigger injectors and every last nut and bolt, plus a U-bender to get it done. If we had another $194 to spend on a camshaft the power jumps to 598 HP
Throwing boost at a modern 5.3L junkyard small block just makes to much sense. Second hand hardware piled in junkyards has always represented a pinnacle of cheap performance. Junkyard fuel injected motors can be had from $250 to $1000. The roller cams and ecellent flow characteristics of the modern heads makes a great combination. We purchased a complete 5.3l engine with computer and wiring harness for $459 with a 150K miles
To pressurize our test subject we put a low ball bid on Ebay for a 76mm turbo and won it for $425. The rest of our cobbled up DIY system included a Turbosmart wastegate, blow-off valve, and a manual boost control. To control the fuel and spark we matched up a stock computer with HP Tuners software, Ford injectors 42/lb and a 2.5 bar chevy MAP semsor.
The U-bends, flanges, and V-band clamps required to build the turbo piping were all suppied by Fastlane Inc.Fastlane specializes in LS, HEMI and modern powerplants. Anyone with a Mig welder should be able to fabricate this setup.
Most of the Chinese turbo;s found on Ebay are small frame units intended for four to six cylinder engines. When it comes to Chinese turbo's
large enough to support a small block V* the selection is limited to the T72 T76 Huffers. We purchased a 76mm unit from ETD motors, which the company rates at 800HP. It features a Billet AL backing plate, a 4 inch compressor inlet, a 2.5 inch outlet, a standard T4 exhaust flange , and a 3 inch exhaust outlet
The Chinese T76 turbo's are offered with just 3 A/R ratio's 0.68,0.81.0.96 The arewa radius ratio refers to the area of the turbo housing cross-section divided by the distance from the center of the turbine shaft to the center of the turbo housing. In other words the A/R ratio refers to how much the turbo housing necks down in diameter as it approached the turbine wheel. A tighter A/R is better siuted to smaller motors as it reduces turbo lag at the expense of top end power . We opted for a large 0.96 A/R ratio
Boost: With the 5.3 strapped to the engine dyno our goal was to see how far we could push the stock long block on 93 pump gas. For baseline pulls we set the wastegate at 8 psi of boost and dialed in a conservative 11.8/1 A/F ratio and 16 degrees of ignition timing. The wee 325 responded with 532hp at 5300RPM and 563lb of torque at 4500RPM. For the next round we increased the boost to 12PSI the Hp increased to 550 and 575 respectively---April 2011 HotRod just a synopses there is alot more in the article-good stuff and pictures