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Being a 4.6L NPI cougar owner. I request a little bit of help. My cat has developed a bit of a cough. Like asthema, really acts up under stress. In this case, under load. It has a steady back fire under WOT, and 40%+ throttle it has a spuratic back fire. Checked the plugs, they look good...

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Im currently trying to J-MOD this 4R70W trans valve body here with Shiroelex, and were trying to figure out what size drill bits we need to use, and if possible on what holes cause this 1 picture from TCCOA isn't a very good reference...

Can I get any ideas on how I might be able to raise or lower compression ratio? I know the heads will have an effect on it. But I was wonder if there are other possibilitys? Thx.

Forced Infuction Quest How much boost would a 4.6 Non-PI or PI engine be able to take before needing to rework the internals?

4.6 Break-in time period I assume that if a proper break-in period isn't allowed for a Remanufactured engine after install... That it'll develope oil issues? :(