EFI Injector Blocks v2.0
A complete re-design of the EFI Injector Block. TurboKraft's EFI Injector Blocks v2.0 make it easier than ever to convert any 1976-94 Turbo to modern EFI (Electronic Fuel Injection). Upgrades from the original EFI Injector Blocks include:* captive phenolic insulator that cannot warp and leak* optimized injector angle -- works with modern injectors with wider spray cone angles for excellent low speed and part-throttle driveability * individual injector blocks -- easier to install over intake studs that are never perfectly parallel* multiple 6ORB fuel rail ports -- options for connecting fuel lines on ends of rails, or beneath to clear A/C compressor They have been tested on numerous 911 Turbo engines making between 350-600 horsepower at the rear wheels. Why use EFI Injector Blocks? Using your existing 911 Turbo cylinder heads & intake manifold yields much faster throttle response than the much more complicated Carrera manifold conversion – and costs a lot less, too. Installing our EFI Injector Blocks requires none of the custom head porting & intercooler fabrication that fitting a Carrera manifold requires. Package includes:* Billet aluminum EFI Injector Blocks* Cylinder head insulator blocks & gaskets* Billet aluminum fuel rails with 6ORB ports (ORB = o-ring boss, common 6AN straight thread with o-ring seal)* Billet aluminum fuel rail mounts* Fuel injector retaining clips TurboKraft inventories EFI Injector Blocks in the two most commonly requested sizes: 32mm and 38mm I.D. (bore).Custom bore sizes up to 42mm ID are also available, including tapered bores, for an additional cost. Examples of straight bore sizes:- 32mm = the standard intake port diameter for all production 911 Turbos 1976-1994- 36mm = standard for the 1994 Turbo S and the most common size for ported 911 Turbo engines, as it is the limit to which the stock plastic CIS injector blocks may be ported- 38mm = popular for high power, larger displacement Turbo engines- 40mm = normal limit of CIS Turbo intake manifold and gaskets- 41.5mm = 930 heads' intake ports enlarged to 3.2L Carrera specification Example of tapered bore: - 40mm bore at top tapering down to 32mm. Engine's intake manifold ported to maximize airflow (i.e. airflow balanced & optimized by Extrude-Honing) but retaining stock cylinder heads for lowest labor costs (no cylinder head removal).