i got a b18c1, and vtec kicks in @ 4600... (sounds like, may be 4700 something.)dot know why...it's normal or may hurt the engine ? (i do not have a vtech controller.) .any other thing may change vech kicks in point? thx for reply.

i have the same motor thats when the secondaries in the intake open up im not quite sure at what rpm the cams finish switching over


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i doubt that theres any thing wrong with that.. its probally normal

Stock VTEC X-over is around 56-5700 rpms. You may have a chipped ecu. X-overs that low create a major dip in hp at the x-over point. I suggest checking the ECU and if it is chipped get a VAFC to tune the fuel map and push the x-over back.

Man。 Thx。 But， Howto Check If My Ecu Been Chipped?

"the GSR's VTEC cross over is at 4875 and the secondaries open at 5750. I have a stock P75 bin on my computer so I know that the info above is correct." --whtteg and yes the p75 is the ls ecu, but he goes on to say, "I meant P72 sorry This was one of those cases were I was doing way too many things at once LOL"

http://www.automotiveforums.com/vbulletin/showthread.php?t=163308

whtteg is a really knowledgeable guy and knows his stuff. So he's most likely right on this one.