Well the KEY issues with the exhaust is the Y pipe and the catalytic converter. Exhaust, You need to start there because doesn’t matter how much you improve the air going in, if you can’t get it out it will run poorly and the stock exhaust is terrible. So I begin every project with a new upgraded pump.Ģ.
I recommend upgrading to the 1996 Vortec 155lph fuel pump which can support up to 450hp and plugs right into a factory TBI sending unit. First I start with a new Fuel pump, STOCK 75lph TBI fuel pump will only support about 230hp before the fuel pressure drops like a rock. ( Summit Racing’s Brian Nutter and Paul Spurlock contributed to this article.1. You can explore all of our LS engine spec guides and LS tech resources here. This guide is specifically for the GM LQ4 engine. Summit Racing has created a series of comprehensive guides for each engine in the LS family, so engine builders and tuners can have a handy reference for their projects. The aftermarket is strong, crate engines are available, and used motors are often cheaply sourced through junkyards. These motors are capable of making a lot of horsepower, and respond well to upgrades like turbos, superchargers, high-flow cylinder heads, intake systems, cams, and nitrous oxide. Since LS and Vortec engines are so common, they’ve become the go-to performance and swap engines of the modern era. Mechanically similar, General Motors’ LS and LS-based Vortec engines wound up on almost every branch of the GM family tree: Chevy, Pontiac, GMC, Cadillac, Buick-heck, even Saab, Hummer, and Isuzu got some LS love. The engine specs and information listed here is for the stock LQ4 engine.
For marketing purposes, it was also known as the Vortec 6000. 3) small block engine used in GM trucks between 19.
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