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Properly set up carbs do give you better throttle response, they make the most sense with a cam change (and also allow for a more drastic cam whereas cis' design doesn't work well with high lift cams).
CIS is a great stock system and probably the best choice for a daily driver or for someone who doesn't have the patience for carbs.
Any fuel system, be it carbs or injection is going to suffer from a contaminated system especially those systems using a fuel distributor, you should see gummed up/cloged carbs!! Having sat 4-5 years your car is going to have a gummed/sticky fuel dist/air sensor plate piston as well as the WUR, injectors etc. I would place my bet on the Fuel distributor first and ensure that is moving properly, you can access the sensor plate through the airbox filter opening. BUT, before anything, you have get rid of the dirty fuel system otherwise you'll be spinning your wheels and getting more frustrated. Clean everything up then check pressures and carry out your diagnostics. Don't forget a new filter!
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Rich @ ROCS
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