LS_Sonoma Posted July 24, 2011 Report Share Posted July 24, 2011 http://www.performancetrucks.net/forums/forced-induction-159/ls-power-twin-76mm-turbo-4-8l-1200hp-still-going-485734/ Quote Link to comment Share on other sites More sharing options...
KillJoy Posted July 24, 2011 Report Share Posted July 24, 2011 JEEZUS!!! :thumbup: KillJoy Quote Link to comment Share on other sites More sharing options...
LS_Sonoma Posted July 24, 2011 Author Report Share Posted July 24, 2011 what appeals to me is that its something anyone can build as long as they have a good tuner behind them. Quote Link to comment Share on other sites More sharing options...
Mallard Posted July 25, 2011 Report Share Posted July 25, 2011 Very nice. That's a lot of power with a few mods that shouldn't cost an arm and a leg. Maybe the 4.8L will be a engine of choice for swaps after reading this article. Quote Link to comment Share on other sites More sharing options...
Benner Posted July 25, 2011 Report Share Posted July 25, 2011 Pretty sure it says 5.3L in the article. Quote Link to comment Share on other sites More sharing options...
Rally Pat Posted July 25, 2011 Report Share Posted July 25, 2011 Damn, that is something. Quote Link to comment Share on other sites More sharing options...
zeitgeist57 Posted July 25, 2011 Report Share Posted July 25, 2011 I meant to post this...HOT ROD Magazine did the build, and it was impressive. Chinese turbos make my USA heart sad, but the LS-based engine makes me happy. Quote Link to comment Share on other sites More sharing options...
Rally Pat Posted July 25, 2011 Report Share Posted July 25, 2011 Pretty sure it says 5.3L in the article. They said that its actually a 4.8 right below the article. Quote Link to comment Share on other sites More sharing options...
Nitrousbird Posted July 25, 2011 Report Share Posted July 25, 2011 And my Avalanche just happens to have a very well running 5.3L in it......not that the stock 4L60E could take any real abuse, nor would I want to do this to it anyway. But damn that's a shit ton of power for that motor! Quote Link to comment Share on other sites More sharing options...
Draco-REX Posted July 25, 2011 Report Share Posted July 25, 2011 Pretty sure it says 5.3L in the article. Further along in the thread it's explained why a 4.8 would actually hold MORE power than the 5.3. Quote Link to comment Share on other sites More sharing options...
LS_Sonoma Posted July 25, 2011 Author Report Share Posted July 25, 2011 And my Avalanche just happens to have a very well running 5.3L in it......not that the stock 4L60E could take any real abuse, nor would I want to do this to it anyway. But damn that's a shit ton of power for that motor! Me too on the 4L60E. May have switch to the Power Glide afterall. Quote Link to comment Share on other sites More sharing options...
Dr. Apex Posted July 25, 2011 Report Share Posted July 25, 2011 Hmm, my dads sierra has the 4.8, should try talk him into some boost! Quote Link to comment Share on other sites More sharing options...
LS_Sonoma Posted July 25, 2011 Author Report Share Posted July 25, 2011 Question for the experts: Would having a 114 LSA be more beneficial in terms of KR vs. the 112 LSA cam? This article goes to show that a quality set of heads should be your first mod. The TEA's are no joke. In the words of the late John Lingenfelter: "The world's best cam combined with a poor set of heads will produce an engine that's a dog. But bolt on a set of great heads even with a poor cam, and that engine will still make great power". Quote Link to comment Share on other sites More sharing options...
10phone2 Posted July 25, 2011 Report Share Posted July 25, 2011 I just read the article an hour ago at Barnes and Noble. I planned on posting about it when I got home. I am no way a LS guy before this article. After reading it, I could not have been impressed more. Quote Link to comment Share on other sites More sharing options...
Cordell Posted July 25, 2011 Report Share Posted July 25, 2011 LS engines are greatly engineered, but I'm surprised the rod bolts didn't let go before then. God I love these engines. Quote Link to comment Share on other sites More sharing options...
pontiacfreak142 Posted July 25, 2011 Report Share Posted July 25, 2011 makes me regret getting rid of my 4.8 now Quote Link to comment Share on other sites More sharing options...
thorne Posted July 25, 2011 Report Share Posted July 25, 2011 the 4.8 is no slouch http://www.40roll.com/dyno/2004%20Silverado%204.8%20Single%20Turbo%209psi%20-%20done.jpg thats 9psi on a 60trim Quote Link to comment Share on other sites More sharing options...
brent1976 Posted July 26, 2011 Report Share Posted July 26, 2011 Hmm, I wonder what my 6.0L will do when I get everything else up to par to handle a bigger turbo with more boost. That article has been a pretty big topic on performances.net for about a week now. Quote Link to comment Share on other sites More sharing options...
Skinner Posted July 26, 2011 Report Share Posted July 26, 2011 love to have a Gbody with that but with a single instead. Quote Link to comment Share on other sites More sharing options...
LS_Sonoma Posted July 26, 2011 Author Report Share Posted July 26, 2011 Hmm, I wonder what my 6.0L will do when I get everything else up to par to handle a bigger turbo with more boost. That article has been a pretty big topic on performances.net for about a week now. I seen that. Also because Im a turbo noob, howd they get 26.5 lbs. of boost out of a turbo size that generally is only rated to 800hp ish? With two turbos is the boost compounded, i.e. 13 + 13? Quote Link to comment Share on other sites More sharing options...
brent1976 Posted July 26, 2011 Report Share Posted July 26, 2011 I'm not sure on the twins either, but the way I understand it is, if one is good for 800hp, 2 are good for 1600. The boost # doesn't matter. Quote Link to comment Share on other sites More sharing options...
coltboostin Posted July 26, 2011 Report Share Posted July 26, 2011 I'm not sure on the twins either, but the way I understand it is, if one is good for 800hp, 2 are good for 1600. The boost # doesn't matter. Bingo- Twins = added AIRFLOW Compound MULTIPLIES PSI, and the overall flow is loosely limited to the size of the larges compressor in the system. (Some have 3+stages) If your still in a fog-Google it. Quote Link to comment Share on other sites More sharing options...
Bobby Lee Posted July 30, 2011 Report Share Posted July 30, 2011 Pretty f-ing sweet. I've been planning a turbo build for my Rat Rod for a while. Still unsure if I want to go single or twin turbo. Quote Link to comment Share on other sites More sharing options...
Trouble Maker Posted July 30, 2011 Report Share Posted July 30, 2011 I seen that. Also because Im a turbo noob, howd they get 26.5 lbs. of boost out of a turbo size that generally is only rated to 800hp ish? With two turbos is the boost compounded, i.e. 13 + 13? What they said. With a typical twins setup they would run in parallel, not in series (compounded or staged). It's really easy to think about with a V engine, just split it in half. One turbo runs off of one bank of exhaust and the other runs off of the other bank of exhaust (see the first picture in that article). You would typically combine the cold side outs into one with a y pipe, just to go through the throttle body and into the intake. Sometimes this happens before or after the intercooler(s). There are 2 'usual' setups either running 1 front mount (combine before or 'inside of the intercooler) or 2 side mounts (combine after). With this particular setup they combine the cold side air in the air-water inter-cooler (see page 78 middle of the page on the left picture). If you think more abstractly about 'half of the engine', each turbo in this setup is basically running off of a 2.4L engine. Vipers run dual TB's and intakes right? Has anyone every seen a twins setup on those where each turbo feeds 1 TB? I've only ever heard of people running big singles on those... maybe due to space constraints? Quote Link to comment Share on other sites More sharing options...
coltboostin Posted July 31, 2011 Report Share Posted July 31, 2011 Vipers run dual TB's and intakes right? Has anyone every seen a twins setup on those where each turbo feeds 1 TB? I've only ever heard of people running big singles on those... maybe due to space constraints? Yes- "Y-Pipe" to the TB's And yes, there is NO fucking room int here for anything. If you have ever seen that motor out of a the car, it s a big sumnabitch. Quote Link to comment Share on other sites More sharing options...
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