1cosworth

question for those with an electronic backround. ive seen that firms use the mac 35a 3 port valve in their boost control appications. can i use the same valve with a simple potentiometer or voltage regulator to adjust the opening of the valve . other any ideas about diy el.boost controlers?

Karlos G

iTrader: (4)

No mate, BCS are normally PWM like an ICV.... The negative/earth is pulsed, faster the pulse the more it opens.

1cosworth

thanks for the reply karlos, so to get this straight there is nothing cheapish i can do to use the valve as a boost regulator?

stevieturbo

Yes. Buy a cheap boost controller, or use your ecu to control it ( presuming you have an ecu that can )

A better question might be, what exactly are you trying to do ?

If you want cheap, just use a mechanical bleed valve.

1cosworth

stevie i do have mech. bleed valve but i was trying for something more accurate and cheap. i guess i ll stick with this for now thanks!!

stevieturbo

A mechanical bleed valve in conjunction with a sensible actuator, is still a pretty effective option.

And accurate compared to what ?

Are you experiencing a problem with the boost ?

1cosworth

it wont hold the boost still at 15psi lets say ,for long time. usually after 15 -20 days it boosts a bit higher 20psi and i need to adjust it again

stevieturbo

And what actuator are you trying to use ?