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Wow Ill bet you lost nearly all potential vaccume for HVAC PCV Brake booster etc.
This is also factored into the displacement of the head and valves.
Kia sephia has a cold air intake horn I removed a Year back My car suffers from too much Vac.
It actually over powers the brake booster return spring. Ive searched everything else and few things could cause this phenomenon.
Ive burned through alot of brakes fuel and brake system parts to sort it out.
I have settled for drilling a number 50 sized hole just after the booster check valve to prevent it mostly.
yep heck of a thing the more throttle the less vaccume but as higher rpms are achieved vac. goes up sharply applying brakes.
Mabe this could be a good system for student drivers LOL.
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