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Quick question

Mase

By Mase,
in Engines & Forced Induction

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Mase Mentor

Mase

Posted
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I've got an rb25 turbo on my rb20 and for some reason it runs 0.4 bar stock. The wastegate is sharing a vacuum line instead of me tapping into the cooler piping. Anybody got any ideas?? My thoughts were either the wastegate was playing up or it doesn't like sharing vacuum lines.

thanks

Jayson

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Sydneykid Grand Master

Sydneykid

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Hi Mase, 0.4/0.5 bar that's the standard RB25DET spring rate in the wastegate actuator. RB20DET spring is 0.6/0.7 bar. If you still have your RB20DET actuator swap it over. Or get a boost controller.

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Mase Mentor

Mase

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Thanks for the advice fellas. Fat32 thanks also but i don't want to run that much boost coming into summer. It's pretty hot under the bonnet of the silvia with the six in there. Sydneykid, yeah i was wondering if i could swap them over or not and was going to have a look at it. Thanks for the advice though. I was just concerned that something may have not been right.

Thanks

Jayson

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Mase Mentor

Mase

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Yeah but last time i put a bleed valve on the thing didn't work. It would almost reach the set boost in 1st, then in the following gears it would try and climb all the way till it hit fuel cut. Tried another turbo smart one and it did the same thing so i wasn't sure whether my wastegate was stuffed or whether it's something that my computer didn't like. I just don't want to take the risk with the new turbo so im going electronic when i can afford it. I think the bleed valve being faulty was a good contributer to stuffin my turbo even tho it only happend a couple of times.

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