pgmfituner
04-20-2007, 04:10 PM
I know a lot of people know about this but i was bored and felt like typing so here it is for the few people out there that have not heard of this! if anything it provides people with info on a good solenoid to use.
if you want to run a lower boost number on the street then on the track/race then all you need is a Honda vacuum solenoid and a manual boost controller. i know many times i thought a dual stage boost controller would be useful but i didn't want to pay so much for one. basically you will use the set waste gate spring for the low boost number and you will set the manual boost controller for the high boost number. ( easy concept) I used a 88 crx si vacuum solenoid off the firewall. (with the b16 only one out of the two were being used) so all you do is hook up the boost controller on the wast gate vacuum line like normal except you put the solenoid in line with the controller, this way the boost controller will not bleed off boost until the switch is activated. as for the switch you could use an APEXI V-AFC if you don't need it for vtec and you want an automatic boost increase. (if your running high boost and want to help with traction issues this might work good) so you set your vtec point at what you want your boost to increase hook up the power to the solenoid and thats that. if you don't want to go that far and just want to be able to switch between two boost levels then just hook up a simple toggle switch and your done. I will include a few pics of the solenoid and a diagram (for those who need it) anyway its a simple mod and if its useful to you then great if not then sorry for wasting spaceBig Grin the crx solenoid holds up to 25psi (i hooked it up to my compressor and set the regulator until it started to bleed out. the one i have tested great to 25psi but i would recommend testing the one you use.)
Ok when you get a solenoid just blow in each port until you find the one that you cant blow through and then hook it up to a 12v source and find the port that the air comes out of. if it comes out of two ports then cap one off and use the other for the boost controller. so now you have an in and an out that only opens when it has power to it. just follow the diagram i attached below and you should be good. if you have any questions let me know. hope someone finds this useful.
[attachment=561]
[attachment=562]
if you want to run a lower boost number on the street then on the track/race then all you need is a Honda vacuum solenoid and a manual boost controller. i know many times i thought a dual stage boost controller would be useful but i didn't want to pay so much for one. basically you will use the set waste gate spring for the low boost number and you will set the manual boost controller for the high boost number. ( easy concept) I used a 88 crx si vacuum solenoid off the firewall. (with the b16 only one out of the two were being used) so all you do is hook up the boost controller on the wast gate vacuum line like normal except you put the solenoid in line with the controller, this way the boost controller will not bleed off boost until the switch is activated. as for the switch you could use an APEXI V-AFC if you don't need it for vtec and you want an automatic boost increase. (if your running high boost and want to help with traction issues this might work good) so you set your vtec point at what you want your boost to increase hook up the power to the solenoid and thats that. if you don't want to go that far and just want to be able to switch between two boost levels then just hook up a simple toggle switch and your done. I will include a few pics of the solenoid and a diagram (for those who need it) anyway its a simple mod and if its useful to you then great if not then sorry for wasting spaceBig Grin the crx solenoid holds up to 25psi (i hooked it up to my compressor and set the regulator until it started to bleed out. the one i have tested great to 25psi but i would recommend testing the one you use.)
Ok when you get a solenoid just blow in each port until you find the one that you cant blow through and then hook it up to a 12v source and find the port that the air comes out of. if it comes out of two ports then cap one off and use the other for the boost controller. so now you have an in and an out that only opens when it has power to it. just follow the diagram i attached below and you should be good. if you have any questions let me know. hope someone finds this useful.
[attachment=561]
[attachment=562]