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Im using one of the base maps (MAP) and have intake header and exhaust. vtec is currently at 4200 using that map, but I dont really like it there. I want to move it to 5000. Will anything else need to be changed if I do that, and am I going to screw things up and lose power if I dont touch anything else?
 

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low cam advance will need to be changed, fueling will need to be done, cam advance on the high cam will need to be moved...

ignition timing changed...
 

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so to sum up his smarter more informed answer...it's not worth the trouble. If you need to change it get a tune. If it's not worth the price of a tune to you, consider an E-tune. They are cheap and there's no reason not to spend $100 or whatever it costs to make the car run correctly.
 

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There should be no negative effects (apart from a possible loss of power from 4200 to 5000 rpm). The base maps were tuned for fuel and ignition for both low and high cam and then the VTEC point set for the best overall power.

Every car is a little different. The best will be found for your car by tuning.
 
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