Jump to content
SAU Community

HOWTO: RB25DET High Boost mode with standard solenoid


paulr33

Recommended Posts

I think you might be confusing the actuator and the Solenoid.

The actuator is doing something and is required to open the wastegate. The solenoid is what you earthed.

Removing the Solenoid will undo this mod and give less Maximum boost.

Link to comment
Share on other sites

  • 3 months later...
  • 1 month later...

Quick question

Is this mod pointless if i am going to be putting a boost controller in my R33 or should i do it so it sits at 7psi down low then the admired 11-12psi in the top end from the boost controller? I want to run 7psi down low and 11 or 12 top end.

Cheers

Link to comment
Share on other sites

R33 turbo has 5psi waste gate spring. The solenoid bleeds it to 7 or whatever the max pressure is set from factory. Boost controller will essentially bypass/replace the solenoid.

Awesome thanks for the easy answer. :) I realised boost controller would replace it after i went out and looked at the solenoid today. My mistake

Link to comment
Share on other sites

Quick question

Is this mod pointless if i am going to be putting a boost controller in my R33 or should i do it so it sits at 7psi down low then the admired 11-12psi in the top end from the boost controller? I want to run 7psi down low and 11 or 12 top end.

Cheers

Why on earth would you want to run lower boost down low? That's heaps pointless.

Link to comment
Share on other sites

  • 2 weeks later...

Should be OK but you could just wind in some more Boost with the T and eliminate the Solenoid completely.

In theory 10psi should be in the safe zone for the turbo but there's too many variables and Luck to be sure it's ok.

Could blow on 7psi, could last years on 12psi... Who Knows? Fingers crossed.

Link to comment
Share on other sites

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



  • Similar Content

  • Latest Posts

    • I would avoid the AWD motor in a RWD using a modified RWD sump and pickup. The way the pick up is positioned, you'll have oil pick up issues on hard acceleration on a track around bends. Even with a baffled, gated sump. I suppose if you don't race on a track and it's used for straight line activities or street use you might be ok.
    • They absolutely are, but the thing is, if you're only exposed to these circuits for a while, what I normally think is good driving suddenly isn't so much. I was a pussy at the Nurburgring (GP) entering corners at 180kph - the difference in the balance of the car suddenly becomes so much more pronounced and I'm still a bit regarded at left-foot braking - something I now practice on my commute. So the (dream) plan with the E90 is to make it a 325i Cup car. Whether I get there or not is another matter. In my mind the simplicity of having the NA variant and cost made it a bit more appealing. Plus, like mentioned above, I'm actually too much of a pussy for big power. Of course I f**ked up by not researching enough on the N53 vs N52, the latter being more robust without the DI system.  Suspension-wise on the BMW, and I've been reading the technical requirements for the 325i cup, basically everything except struts has to be standard - bushes are free. I figure you get about 5-10mm adjustment with the rear camber bolts which should translate to 0.5- 1.5 degrees of adjustment. So with coilovers, lowered at 30/40mm I expect I can dial out some of the camber from a drop and attain -1.5 to -2. If necessary, I could get the same effect as the M3 arms with some offset bushes. There is a limitation on ARB width to qualify, although I absolutely want to get either M3 ARBs (can't say sway incase I upset GTSBoy) or the H&R ones - both of these are the cheapest options. Like mentioned, M3 arms are on the way and I should have them fitted within the next week. How are the BC Racing coilovers btw? Reviews are mixed but I think for me they would be fine; a friend of mine uses them on his R34 for track driving and has nothing bad to say. I'm looking at these or the ST coilovers (German brand, new to me) as prescriped the in Cup spec sheet. They're both similarly priced and offer camber adjustment. It's fine but it really upsets my OCD. I've got a couple of options for dialing out the rear camber and keeping my ill-fitting wheels: raise the rear a little bit, say 5mm, that should permit -2.5 camber or drop the front to restore that slight bias of more negative camber up front (not optimal with the roads here). The next alignment won't be until at least next year and I really need to rebuild the rear subframe. For now, I'm not using it at all on the streets except occasional blasts through the German countryside. I was covering about 10k kms p/year in Japan, I expect this to now be about 3-4k. You could say buy better sized wheels, and yes, I should have. But the wheels came from the Z and price of good wheels is just insane now. Again, a couple of options: get a new set (I want 17" RPF1s) or buy two used 9.5J TEs, both are about the same price excluding shipping. 
    • by rotating the motor i mean to dismount the plate on the motor and mount it different 
    • Sorry I meant to say, Is that $3,500 landed or is that just the sticker price in Japan? 
    • Same (except for the R32 bit), my son is saving for his first car which he hopes will be a Kouki V37 GT with the twin turbo 3.0L V6.... kids these days! My first car was a Renault 16 haha 😄 Sorry for the thread hijack
×
×
  • Create New...