what is the different in vtec solinoid one is bog one is small on the dohc

and is there some way i can change my vtec kick in rpm it kicks at 55 i want it at 45 or lower my friend same car kicks in lower we traded ecu same ****

 

Come again?

 

if by changin your vtec to kick in at 45(00) rpm instead of 55(00) rpm then yes you can buy a vafc or chip or a diff ecu but if thats not what your asking i dont understand the question.

 

USDM vtec solenoids are smaller in diameter than JDM ones. But it makes no difference.

 

45 is not going to do anything good. Friend of mine tuned his gsr and they lowered it like 100 or less, not 1000. He used the vafc!

 

Yeah, I am pretty sure that a dyno is your friend when tuning the changeover point.

 

try using some commas every now and then, it was pretty hard to read.

yes you can change the vtec crossover point, ecu change, hondata, and others!!