i was would i don't need a relay to make my v-tec kicik in on my 89 civic si single
v-tec this is how i was told to run


red wire- goes to the battery
black wie- goes to a body ground
white wire- goes to negative side of coil
yellow wire- goes to v-tec solenoid
grey wire- not used


NOw i was also told that the msd is giving an ground and i need a pos and was told to us a relay for that now can some tell what do to do thanks

 

if you have a stock motor you dont have vtec....

what motor do you have and the proper ecu should activate vtec

 

I have a single v-tec motor and i' using a msd rpm activated switch pn 8950 and need to now how to make the msd kick in the v-tec

 

why dont you just use a p28 ecu?

 

because OBD1 takes the fun out of it you could use a relay, the selonoid dosent take much power so you really dont need to, but if you have a relay handy go for it

 

p28 will make more power.... its got better timing and fuel maps

 

well if he is using the MSD RPM switch he is going to need a 30amp relay. The MSD switch has a negitive trigger, so the relay has the 12 volts and when the MSD activates it triggers the ground and v-tec will engage because its a complete circuit. Willing to bet cash is the major draw right now. I drove for a year on a Z6 with a PG7, never had any problems from it how much strong h/p wise I heard seat of the pants only, never seen any graphs, so that may be true but how much never seen/heard. Here is a link to help with the relay wiring http://www.geocities.com/motor....html

 

i'll try it