As with our column last month about six speed transmissions converting to a fuel injection setup like the gm tpi will not be as cheap nor as easy as installing an 850cfm double pumper holley but the benefits to using a fuel injection based delivery system will far outweigh the additional costs involved. I have posted pages to help those with these systems overcome the limitations of those systems and point out what those limitations are.
Two Stroke Fuel Injection Ktm S Path To Tpi Dirt Bike Test
What is tpi engine. A stock tpi engine in good mechanical condition can have between 205 and 245 hp at the flywheel. These computer controlled engines delivered more precise control of fuel and spark yielding better fuel mileage and crisp throttle response in the process. The tpi manifold was originally designed for 305ci engines with 19 lbhr fuel injectors operating at 36. Engine management system in the tpi system a more versatile mas air flow sensor replaces the familiar manifold absolute pressure sensor as the main engine load sensor. High horsepower engines need 40 to 48 gallons per hour of fuel. A max effort tpi engine can get near 400 hp at the flywheel but these are few and far between.
Welcome to harris performance this site dealing with the tpi tune port injection system used by gm from 1985 through 1992. In this video i go through as much as i know and could find out on the net. Featuring tuned port injection tpi the 350 l98 was chevrolets first successful foray into the world of efi sorry l83 crossfire engine. You dont want to use a racing type pump because they push too much fuel and the tpi regulator cannot push it back to the tank fast. The tuned part of tpi refers to the length of the intake runners. Because the maf sensor measures air mass entering the engine and not engine manifold vacuum it is unaffected by changes to camshafts and ignition timing.
The tpi system includes a manifold base two sets of runners a plenum and a throttle body. Ktms transfer port injection how it works where it came from and how does it help bet the euro emissions bullshit. While i specialize more in the daily driver type fuel injection aspects rather than. The system was designed to take advantage of a phenomenon known as inertial supercharging which we also discussed in the april. You may find some machine shops that say they can build you a 450 hp tpi engine but this is not realistic. Gm really started firing on all cylinders with the introduction of the tuned port injection tpi system in 1985.
Gallery of What Is Tpi Engine
