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HybridZ

What is a bleeder valve for?


scottyMIz

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It bleeds pressure from the small line from the turbo's output to the waste gate. The Mitsu (at least the Talon/Eclipse) uses a solenoid bleeder circuit. It has a "T" in the line from the turbo to the wastegate. It goes from a slow bleed to closed when the ECU thinks the knock count is too high (although it throws in retard before that).

 

Anyway, the popular thing on some turbo cars is to change the amount of that "bleed". This is o.k., but it's MUCH better to put a relief type valve between the turbo output and the wastegate, with no bleeder.

 

The nice thing about a relief type manual boost controller (well, it's not some electronic boox and a solenoid like HKS, Greddy, etc.) is that the wastegate gets NO boost pressure until the pressure against a ball in the controller overcomes a spring force. The spring preload is adjustable.

 

This can be dangerous though. You can set it to too high of a boost "relief" pressure and get detonation. But at least the Mitsu computer pulls timing out on you so that can save you or signal to you that you've gone too far on the setting.

 

Not bad for an old American V8 hotrodder, huh? icon_smile.gif

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Yep. 1992 Eclipse GSX is my daily driver.

 

Bad paint, dings, sluggish at low end (carbon'd combustion chamber induced knock causing timing retard) sometimes, but still a fun car for DD. Ton's o' fun in the rain. But other than a pressure type bleeder and a few shifter mods, that's all I've done to it. All my mod money goes into the Z icon_wink.gif.

 

BTW, lot's of sharp people on the DSM.org list and site. The guy (Todd Day) that runs the list and site un-assembled the ECU code and burns custom EPROMS for people with tons of neat stuff, to include multiple rpm limiters, etc. etc. Wish my car had an EPROM version of the computer! Not all did.

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