Jump to content
SAU Community

Recommended Posts

Hey,

I have some issues with my rb25det in r32. We tried to tune it but to no avail because the voltage keeps dropping. I tried two new alternators and niether one changed anything. I have check continuity from -ve and +ve from battery to alternator and i have checked voltage at alternator and battery and its the same both sides, and as the car runs the voltage keeps dropping.

I am really stuck!!! If someone can offer some ideas I would be very appreciative.

Thanks, Leon

Link to comment
https://www.sau.com.au/forums/topic/266144-rb25-voltage-problems/
Share on other sites

What sort of voltage are you talking?

I have always seen a slight voltage drop with mine; its nothing the volt vs ign, volt vs inj correction can't take care of.

As its a different motor my bet is the chassis/motor being poorly earthed.

Edited by TheRogue

its definately got good earth. There is 2 from chassis to battery and 2 from chassis to block, all on clean metal.

Not sure what alternator it is, its a 90amp mistu one. Can anyone tell me whether or not r32/r33 have internal or external volt regulators?

okay so they have internal regulators...

Now just wondering, ive been told the battery light should turn on in the dash when i key on for the alternator to be working properly... the light only comes on after driving and battery goes flat///

any ideas anyone?

  • 3 years later...

Hey,

I have some issues with my rb25det in r32. We tried to tune it but to no avail because the voltage keeps dropping. I tried two new alternators and niether one changed anything. I have check continuity from -ve and +ve from battery to alternator and i have checked voltage at alternator and battery and its the same both sides, and as the car runs the voltage keeps dropping.

I am really stuck!!! If someone can offer some ideas I would be very appreciative.

Thanks, Leon

I currently have the exact same problem. But mine is still a rb20 in r32 with voltage dropping under engine load.

Anybody got ideas?

Have you tried a new battery? This cold weather can make them fail...

I would guess the power through the dash light to the alternator may not be wired up correctly or open circuit? I seem to remember it need to be connected to charge correctly? I would be taking it to an auto elec.

The charge light MUST come on on the dash when you turn ignition on. It is the small current flowing through that circuit (and the alternator) that excites the alternator and lets it actually charge. If the light does not come on, then you either have a wiring problem, or the globe is blown (assuming no alternator fault).

It is that simple.

Edited by GTSBoy

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

    • There's plenty of OEM steering arms that are bolted on. Not in the same fashion/orientation as that one, to be sure, but still. Examples of what I'm thinking of would use holes like the ones that have the downward facing studs on the GTR uprights (down the bottom end, under the driveshaft opening, near the lower balljoint) and bolt a steering arm on using only 2 bolts that would be somewhat similarly in shear as these you're complainig about. I reckon old Holdens did that, and I've never seen a broken one of those.
    • Let's be honest, most of the people designing parts like the above, aren't engineers. Sometimes they come from disciplines that gives them more qualitative feel for design than quantitive, however, plenty of them have just picked up a license to Fusion and started making things. And that's the honest part about the majority of these guys making parts like that, they don't have huge R&D teams and heaps of time or experience working out the numbers on it. Shit, most smaller teams that do have real engineers still roll with "yeah, it should be okay, and does the job, let's make them and just see"...   The smaller guys like KiwiCNC, aren't the likes of Bosch etc with proper engineering procedures, and oversights, and sign off. As such, it's why they can produce a product to market a lot quicker, but it always comes back to, question it all.   I'm still not a fan of that bolt on piece. Why not just machine it all in one go? With the right design it's possible. The only reason I can see is if they want different heights/length for the tie rod to bolt to. And if they have the cncs themselves,they can easily offer that exact feature, and just machine it all in one go. 
    • The roof is wrapped
    • This is how I last did this when I had a master cylinder fail and introduce air. Bleed before first stage, go oh shit through first stage, bleed at end of first stage, go oh shit through second stage, bleed at end of second stage, go oh shit through third stage, bleed at end of third stage, go oh shit through fourth stage, bleed at lunch, go oh shit through fifth stage, bleed at end of fifth stage, go oh shit through sixth stage....you get the idea. It did come good in the end. My Topdon scan tool can bleed the HY51 and V37, but it doesn't have a consult connector and I don't have an R34 to check that on. I think finding a tool in an Australian workshop other than Nissan that can bleed an R34 will be like rocking horse poo. No way will a generic ODB tool do it.
    • Hmm. Perhaps not the same engineers. The OE Nissan engineers did not forsee a future with spacers pushing the tie rod force application further away from the steering arm and creating that torque. The failures are happening since the advent of those things, and some 30 years after they designed the uprights. So latent casting deficiencies, 30+ yrs of wear and tear, + unexpected usage could quite easily = unforeseen failure. Meanwhile, the engineers who are designing the billet CNC or fabricated uprights are also designing, for the same parts makers, the correction tie rod ends. And they are designing and building these with motorsport (or, at the very least, the meth addled antics of drifters) in mind. So I would hope (in fact, I would expect) that their design work included the offset of that steering force. Doesn't mean that it is not totally valid to ask the question of them, before committing $$.
×
×
  • Create New...