Jump to content
SAU Community

Rb25 Wastegate Actuator Valve On2 Rb20


Recommended Posts

Iv almost got together the parts for my RB20DE - DET upgrade (no smart ass comments please <_< ) and one thing i havn't got is the boost regulator valve that controls the wastegate to open at standard boost. I can get one cheap of an RB25det but alls i want to know is will it open the wastegate at the same point the RB20det one would. I compared it with one of a RB20DET from a ceffy and it looked identical.

anyone know if the 25 one will do the job properly for me?

thanx!

Link to comment
Share on other sites

Its 5 psi mate.

The standard boost on an RB25 is 5psi, until it reaches 4500rpm when the boost solonoid bleeds air to reach 7psi.

If it was 7psi, how would the RB25 have two stage boost? You cant run boost lower then the wastegate spring tension.

Besides i put one onto an RB30DET i built with both a RB25DET and VG30DET turbo and when the wastegate actuator is plumbed straight to vacuum/boost source it hold exactly 5psi.

Link to comment
Share on other sites

  • 2 weeks later...

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
 Share



  • Similar Content

  • Latest Posts

    • Yeah i get what you mean. Mine thought i wouldnt mind being a bit quieter overall as well as have the drone taken out is more what i was trying to say. Im going to start with a mid muffler, and go from there 
    • I'm struggling with a similar issue on an RB26. Make sure you know whether it's volume or resonance. Mine seemed louder when cruising compared to at idle. I downloaded a decibel meter for my phone. Take my less than scientific results with a couple grains of salt, but the decibels were the same at idle and at cruise. Mine seems to be a resonance problem. At 2500-3500 rpm, the sound is different and "louder" to my ear. I think it's vibration from the pipe, the car body, the floor or something creating tone. Anyway, consider that it may not be strictly a volume problem.
    • Does this count as a time trial as well? I got all gold in the master super licence (1 lap time trial) and received a McLaren MP4/4 for my trouble.  If anyone else has done this, did you ride the wall right around the first long right hander at Lake Louise snow track to get gold? I couldn't do it any other way... best I could do without riding the was was within 2 tenths of the gold time.
    • I definitely get the low power, sporty car to drive to smash gears but not be doing eleventy million miles an hour! It makes all the normal drives fun!   Rev match tune sounds like the funs! I didn't know the NC had a DBW throttle!   As for me, still have the Skyline, it still has the Barra in it. It's been pushed to the side of the workshop at the moment. Pretty much waiting on me finishing the wiring, and dropping new fuel lines in. Got myself an ACDC Tig end of last year so been teaching myself TIG welding to build a few things for the Skyline. The missus wrote off her GTB liberty at the end of last year, and got it back on salvage rights stupid cheap. It's also still registered, so will mean easier for me to take to the track already done most of the panel damage, just playing "clear the workshop" to make space to pull the motor and box out, fix some oil leaks, replace the clutch, and replace a few minor broken things.  Also got a Lathe at the start of the year, which is adding to the annoyance of no space, which is another reason I'm trying to build things to get more space, to get the Lathe back in a final home for it. It's a BIG lathe, can turn a 355mm diameter, and 1metre between centres... Got it at a steal! So between it and the TIG and old MIG welder, I'll be fabbing some fun little shit up But we've had a lot of shit stuff happening at home, so it's slow going getting things done. But one step at a time!
    • I love Catalunya.  Got a 1:54.632. The AMG is a hoot.
×
×
  • Create New...