Jump to content
SAU Community

Which Would You Trust? - Dyno Chart Or Boost Gauge? Bnr34

djvoodoo

By djvoodoo,
in Engines & Forced Induction

 Share

Recommended Posts

djvoodoo Experienced

djvoodoo

Posted
Posted

Have read many topics on grenading ceramic turbos when pushed above 1 bar etc. Wanting to prolong the life of mine, was curious as to how cautious I should be with my standard boost gauge reading vs dyno reading.

My r34 is running stock boost (without the restrictor)

Dyno chart shows a peak of around 14.5 (1bar) dropping to 13.5 at redline.

But my boost display reads quite high between (1.10 & 1.17 bar or maxing about 16.5-17psi) when i give it a bit of a hit.

Would I be better going with the dyno readings as a safe measurement as I'm sure the boost gauge display is less accurate?

I know the ideal win is going an EBC or boost control kit with the Power FC but want SAU opinions.

post-74132-0-21036200-1385683720_thumb.jpg

GTSBoy Grand Master

GTSBoy

Posted
Posted

Take car to trustworthy performance workshop. Borrow their boost gauge (they'll have one they use to check other boost gauges against). Temp hook up, test drive, answer available in seconds.

In general, do not trust the dash boost gauge on any Nissan. It might be accurate. Or it might not.

Also in general, the boost sensor on a dyno should be accurate. But who knows in this specific instance? So check against a known good gauge.

scotty nm35 Grand Master

scotty nm35

Posted
Posted

Boost gauges, especially mechanical ones, are notoriously inaccurate. My first one was out 3 or 4 psi.

Not sure how strong the ceramic wheel on the 34's is specifically, but I ran my stock ceramic Stagea turbo at 20psi for 6 months with no failure. If the bearing is in good condition and the rotating assembly is balanced you should be fine for a while at least. Then Hypergear it. ;)

djvoodoo Experienced

djvoodoo

Posted
  • Author
Posted

I'll be saving up for some -7's or -9's after Xmas, so as long as they hold out for a few months it should be fine :cheers:

Will hook it up to another boost gauge and have a run as well, see how much out the gauge is/isn't

levinboy Grand Master

levinboy

Posted
Posted

Mine was running exactly the same on stock turbos (R33gtr) same dyno/tuner, except you made more power :P

Mine ran fine for a year till I hit the exhaust on something and it pulled it back causing the exhaust manifold gasket to leak then when -9s ;)

Also saw your car on the dyno looking good

  • Like 1
XKLABA Grand Master

XKLABA

Posted
Posted

The 34 gauge is pretty good, as said you probably run my boost on the street due to different loading

The 34 turbos are different to the 32/33 one and a bit stronger, I run upto 19psi on my 32 turbos and have done so for 9 or so years, driving style has a lot to do with turbos exploding

On another note I have a APexi Power FC with boost controller for R34 GTR for sale ATM

Rolls Grand Master

Rolls

Posted
Posted

A replacement stock turbo is only $400 ish anyway, I would just leave it and enjoy it as it is, I would trust the workshops gauge if they tune cars all day on it, I've never had a stock gauge that was remotely accurate (though this is in the older R32s and 33s, 34 might be better)

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
Go to topic listing


  • Similar Content

  • Latest Posts

    • PranK
      Chris' Toyota Mark ii JZX110

      By PranK · Posted

      This looks great! Awesome to have the 5 speed with an LSD in this. The Recaro's look like SR2's or SR3's. It's a shame they've been retrimmed as they would have looked sweet in their original colours. I think I'd want my agent to be a little more up front and informative too. I've never imported but I reckon it would make me a little nervous, so the more info the better.
    • soviet_merlin
      Duncan's V37.......race car?

      By soviet_merlin · Posted

      Thanks for doing that Duncan! Makes you a good person in my books. We don't get kangaroos or wombats here. But we have bats and it's similar. AFAIK it's often the mums with a baby attached that get hit because they drop lower when starting from a tree. If you hit an animal, check on it. https://www.ifaw.org/au/resources/wildlife-rescue-app An app to get the closest wildlife rescue contact.
    • Murray_Calavera
      Jacks that fit under GTR lips that can reach the subframe?

      By Murray_Calavera · Posted

      My dream is also to have a proper hoist, but I don't think it will ever happen. My quickjack is probably as close as I'll ever get, it really is very good though. 
    • Duncan
      Duncan's V37.......race car?

      By Duncan · Posted

      Yeah we keep on in the dailies, it is pretty poor how many animals get hit and the driver leaves without checking....have saved a couple of little ones over the years. Bit of a gruesome job though, pouches generally need to be cut open because they are so tight and often the joey doesn't realise mum is gone so they are still locked onto the teat. I checked the modules in front of the DS wheel where an oil cooler should go.... There is the radar unit - that can go for race use) One of the 2 HX water pumps, the silver cylinder. That needs to be kept but might be able to be relocated But the bad news, the big computer mounted vertically in front of the wheel (blocking any potential air exit) is the electric steering computer. That is required until/unless i do a hydraulic steering conversion, and in CAD based modern car design it is not like I can just pop a big unit like that somewhere else (plus the loom would be too short anywhere else too). So, the passenger side is OK to clear out (just use a smaller washer reservoir, potentially elsewhere), but the DS no beuno
    • Duncan
      Chris' Toyota Mark ii JZX110

      By Duncan · Posted

      Well, all the best with the new camry It was interesting to hear about the UK process, it is generally a lot more streamlined here with a shipping agent looking after all the import side (noting the exact final price can still be a surprise.....) and I've used a few different brokers on the japan (or US) side, and never had any trouble with any of them....luck of the draw I guess. You mentioned you didn't get the auction sheet (understandable since you bought it from a dealer, not auction), but I always try and get hold of that because they are pretty thorough. I've imported 2x R grade vehicles over the years and both were fine, repairs in Japan are pretty thorough compared to here in Oz.
×
×
  • Create New...