Bleed valves/boost contollers

[Sydneykid]

I have used the Autospeed design boost controller (using Norgren valves) on quite a few cars and I have never EVER had a boost spike problem. We run either Datalogit or Motec dash logging on the race cars, so I would have logged it if it had occured. I do mount the 2 valves inside the heat shielding as they like to have a stable temperature. One valve gives good boost control and the other some adjustment of the boost climb rates by limiting the lowest level of boost pressure the wastegate actuator sees. Up to a pre set point (boost pressure), this controls the premature opening of the wastegate.

I have found the Jaycar IEBC to be superior in achieving stable boost, but most of all it enables a totally adjustable rate of boost climb. This is only made possible because the IEBC has the boost solenoid in series with the wastegate actuator. All other EBC's have the solenoid plumbed in parrallel with the wastegate actuator. This means the wastegate actuator always sees some boost pressure and so the solenoid is not in 100% control of the rate of boost climb ie; you get some premature opening of the wastegate.

If you can read instructions and solder components onto a circuit board then the IEBC is the best $80 you will ever spend. There is more info on my experiences (and a few other peoples) with the IEBC and DFA in the Stagea forum.

[CEF11E]

I've just picked my self up a cheapo ball and spring type bleeder. Its not actually a bleeder, the knob adjusts the tension held on the ball.

 

Should work well as I've had a similiar type before which worked really nice.

 

http://cgi.ebay.com.au/ws/eBayISAPI.dll?Vi...ssPageName=WDVW

hey Cubes, thats the one i am using and i hove found it very good, did you buy it after reading my thread on it here?

how is it going have you used it yet?

[zymotic]

yea I just bought one of those off ebay I hope u guys are right about them being good.

at least it was cheap.

[Cubes]

Thats what I figured.. its cheap.

[zymotic]

so long as it doesn't break and make my engine go bang bang

[R31Nismoid]

All bleed style boost controllers suffer from this problem.

incorrect.

My car doesnt drop one psi.

Admittadly we are running an EXT Gate also, but the PSI we have bled off that is perfect

[justin911]

hmmm its interesting.. ive got one of those gfb bleed valves ive only had it working for a few days... I set it to 10psi but it was spiking to 12 or so.

I had my car serviced yesterday and they set it to 11psi for me, hasnt spiked once (done 300km so far and im realy trying now to make it spike..)

Its amazing what the professionals can do

[nedb]

I have a GFB Atomic bleed valve. It's set to 14 psi. Initialy it spikes to 15 psi but quickly comes back to 14 psi and holds it perfectly all the way to redline.