sorry for the silly question, i just wanted to confirm that if i connect the turbo boost source directly to the solinoid that the car will run on wastegate pressure.

 

Yes mate.
The gate will open at its pre-set pressure as there is nothing in between bleeding off the air.

 

What do you mean by "solinoid"? Did you mean , solenoid? Are you referring to the factory boost control solenoid(BCS)?

What boost reference source do you use on your car? Are you "T"'ed into the hose that connects the intake manifold to the diverter valve, or are you getting the boost reference signal from the nipple on the compressor discharge tube, aka, "J"-Pipe?

I am curious as to why you want to set up the boost lines so as to run waste gate pressure?

I don't know about connecting the BCS to the boost reference source. But, if you take a length of hose and connect one end of it to the nipple on the compressor discharge tube and the other end to the nipple on the top of the WGA, then you will be be running on waste gate pressure.

Be sure to plug off and secure any open hose ends that were hooked up to the BCS and any other vacuum ports that may have been left open such as the one on the MAF intake hose with golf tees or some such.

 

thanks benny and sparky. exactly the answer i was hoping for

i broke the plastic barb on perrin 3 port... well it just snapped off... why they put plastic instead of metal... i wont know....anyway its a new turbo so i wanted to run on gate for a little while anyway.

 

An advantage of controlling boost level directly with the actuator is that you can adjust the WGA's spring pressure so as to optimize your turbo's spool up slope. Let's say for example that you are planning on running 21 PSI peak boost. So, you will be able to adjust the overall length of the threaded actuator rod to 17-18 PSI of spring pressure.

Once you adjust the actuator rod to achieve that waste gate spring pressure level you can then adjust the final 2-3PSI with your boost controller. This gives the best spool up and boost control as long as you are not experiencing any boost creep.

 

cheers thats pretty much what i was going to do... before the bloody thing broke off. the actuator is a 18psi i am seeing 15psi.. planning on running 25 so want it alteast 18-20psi

 

So, I am assuming that your turbo is fitted with the 18 PSI HD Forced Performance WGA. Or is it another type? It is perfectly normal for the FP 18 PSI unit to have a base spring pressure of 14-15 PSI right out of the box. So, it may be rated at 14 PSI cracking pressure and 18 PSI full open. But, mine was full open at 14 PSI. FWIW. So, don't worry.

18-19 PSI of spring pressure should be no problem with that particular unit. Then there is a dicey range from 19-21 where many of those units exhibit an inherent boost spike. I just mention it so that you won't get spooked if it happens.

After 21 PSI the spike is no longer a factor. So, you could preload the spring to 21-23 PSI instead of 18-19 PSI. Just remember that there is that no-man's land from 19-21 PSI that you should be aware of. That's all. No big deal though.

 

its a MAP 18psi billet actuator (EF3)