Cheap and easy to convert LT1 to distributor??? Having looked at this project years ago, I never thought a "good" conversion was cheap or easy.
Why would high rpm and high horsepower make a difference in series vs parallel plumbing? It's about line size, rail size, pump flow, injector flow volumes, etc. Running in parallel reduces number of restrictions and reduces pressure waves transmitted through system. Crossfire injection system was an extreme example. OE manifolds used larger injector on when TB's plumbed in series. Changing to parallel allows equal size injectors without mismatched fueling. That engine produced what... 205 hp at maybe 4500?
TINBENDER59, along with injector spacing, be sure to measure the angle of the holes in the fuel rail (if any). The Gods of Fire and Destruction love it when injectors are installed in fuel rails at an angle that prevents best O ring sealing.
Steveo, any advice on how to DIY a set of rails with relatively basic tool for non-machinists? Seems like consistently measuring compound angles would be a bit tricky when setting up a rail in a drill press. Same for boring the manifold. Not sure I agree with "really shitty fit" O'ring comment. 'I've been doing this since the days when GM trainers freaked out if you didn't treat every O ring with kit gloves. I can count on one hand, maybe, the number of problems I've seen with properly installed rings in properly machined holes.
405 cubes, sometimes the best intake available to us as street guys is the one that does the least damage. Putting a GM TPI intake on a large cube engine would make stupid huge amounts of torque... until 3500 rpm or so. An old F.I.R.S.T. TPI would do much better but most people don't want to spend the money to buy one. So you have to pick from what's left over. Intake manufacturers will list an intake's operating range based on a range of engine displacements and list those numbers as a guide. Because an intake is listed from
2500-7000 rpm does not mean it will make best power on your engine at 7000. It only implies the intake will not be happiest with a low end cam, tall rear gears, and a tight converter.
For viewing pleasure, the F.I.R.S.T. system installed:
Bookmarks