Parts replaced with new : Water pump, alternator, distributor, battery, fuel pump, injectors, filters, plugs and wires. I always open up the diameter around where the pre cat would be, and then shrink it back to stock after about 1 foot or so to give it a mid range boost while keeping good velocity and pressure for N/A.
I redid my Rx7 exhaust and never had the issue with sonic vibrations at certain RPMS.
Not a big deal really but it seems to me to be a poor design. Is there a way to design the system to cancel out those sonic vibrations like they showed me in school for racing engines or is that whole thing a lost cause and im stuck with a flexi pipe? Now im regretting it of course because at 2200 rpms and like.2800 rpms the sonic vibrations are shaking the entire exhaust system but while running hard and WOT it wont. I didnt use the flex tube piece because I wanted a smooth flow and doubted that those flexi pieces wouldnt leak. Question 4: I redesigned the exhaust system starting from after the o2 sensor and stopping at the muffler. Question 3: The egr tube that leads into my exhaust manifold.is there a way to seal it, if there is a leak there besides replacing the whole egr tube and hope that the flange seats correctly? Question 2: Does my particular model have those egr passageways in the intake I need to clean? Ive taken off the fuel rail before when I replaced the injectors and I saw nothing like what ive seen in other models but maybe its somewhere else I cant see.
Question 1 : I know its best to clean and keep the EGR system but whats the deal with knock and higher combustion temps causing possible damage over time? If I run her really hard before the ECU kicks on the light, it seems a lot better at idle than before where it misfires and it wont kick on the light but the misfire is still there, even though its half better.
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