Jump to content
SAU Community

Dyno An Gtr34 V-spec On Rwd Mode On A 4wd Dyno

HorseGTR
 Share

Recommended Posts

HorseGTR Apprentice

HorseGTR

Posted
Posted

Hi guys,

If we remove the 4wd fuse (gtr34 v-spec) to measure the rwkw on a 4wd dyno, what will affect or damage to the drive line??

In normall driving condition (without torque split), is it true that the gtrs are running permanant on 25% front and 75% rear power??

Any explains would be appriciated, CHEERS !!!

Count Grantleyish Grand Master

Count Grantleyish

Posted
Posted

On 34 gtr, remove 4wd fuse and front driveshaft and it'll run on RWD mode.

Do a search as this topic has been covered many times.

Why you want to run RWD on 4WD dyno?

Cheers

Grant

ebola Proficient

ebola

Posted
Posted (edited)

What the mechanic did is fine on an R32...

R33/34 - consider the equivalent of slipping the clutch for the entire dyno run.

take a poke through the forums, have a search and I am sure that there will be a technical thread about it . Understand WHY it is not a good idea (its not...).

but i would not put it on a 2wd dyno without removing the fuse like in the 32gtr. i am unsure about 34gtr but i beleive its similar.

Its not similar. You won't damage the R32 like that.

Edited by ebola
R31Nismoid Grand Master

R31Nismoid

Posted
Posted
as I mentioned, we had to run it in rwd mode (on a 4wd dyno) because during the tuning the 4wd check light came on and the torque didn't split at all. So the mechanic took a risk !!!

mentioned where? call me blind but in this thread you havent said anything about that

Anyways...

Please search, common topic this is for GTR owners.

And if your mechanic doesnt know this... i wouldnt take the car back there as they have no idea (obviously)

To answer the question briefly, the shaft MUST be removed.

This is crucial. Just pulling the fuse will still cause wear to the clutch packs in the 4WD transfer case as its not in "true" RWD mode with the drive shaft still connected.

T04GTR Grand Master

T04GTR

Posted
Posted

yess. just incase. any awd post r32. you cant just pull the fuse as youl burn out the transfer case.

as its "preloaded"

as a general rule. if the cars got 2 drain plugs on the transfer case you can. if its only got 1 plug. you cant

HorseGTR Apprentice

HorseGTR

Posted
  • Author
Posted

I did search about this attesa controll topic, but I haven't satisfied because all GTRs can use after market torque split controlls (such as an HKS unit for example) to adjust the desire split levels. I've seen some footages about street drag in Japan, gtr33 and gtr34 did a massive burn out b4 they lined up. Hmm, how did they manage to do that without burning the clutch packs in the transfer case???

What I'm thinking is when we adjust the torque controll module at 0, means no torque transfer, isn't this equivalent to remove the fuse ( no torque transfer too) ??? can any one make this clear?? CHEERSS !!

Duncan Grand Master

Duncan

Posted
Posted

why keep asking opinions if you are not going to beleive them?

the correct info is in this thread. 32 is fine to run in rwd mode indefinately due to different attesa pump preload on the plates in the transfer case. 33 and 34 all 4wd systems always have some front drive.

we make attesa controllers. They modify the signal to the computer to go rwd only, but that does *not* change the preload in later models so we recommend not using rwd mode in 33 and 34.

And a burnout is one thing (let the case slip for a while), and they may have line locker for the front brakes, but a dyno is totally different. What would happen if you have the rear on the rollers, start to spin the rollers, wheel speed sensors show rears are slipping so computer sends torque to the front wheels. I don't want to be standing nearby.

GT-R LM Proficient

GT-R LM

Posted
Posted

Mashrock: yeah its true now go back into your room and talk to the little fairies and stuffed toys that talk to you.

Either you have no idea or youve been smockin to much crack

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

    • joshuaho96
      Speed Sensor replacement

      By joshuaho96 · Posted

      Drain it. I got official Matic D but you can get whatever is listed as Matic D compatible.
    • QB6SAGR
      Tein Circuit Master- rebuild worth it?

      By QB6SAGR · Posted

      Thanks guys,  Yeah I should at least have them dynoed, at least then I know what I've got as a starting point.  The springs on these are hard as rocks. I vaguely remember Russman saying he was going to sell the shocks to me with the rocks fitted, as he was keeping the softer springs for his new setup.  I didn't click at the time but of course that was to let me know the shock/spring wouldn't be matched.  I also remember pricing up new springs around 2014-15, but, house, money etc. it never happened. So that was another reason to have them rebuilt. I have rebuilt the forks on many motorcycles so I think I could handle the seals on these easily enough, but getting the valving right would be a rabbit hole I cbf exploring.  Duncan, interesting to hear RP was tuning these back then. I might give them a call.  In the mean time I have been busy fitting sway bars. The Whiteline rear sway bar I purchased 15 years ago finally got fitted, along with the Whiteline front bar that showed up last week. Just waiting on new links for the front sway bar to finish that off.  And my spare set of advan AVS VS5's should be back from the powder coaters in a Pearl White finish sometime this week, with a set of Hankook RS4's lined up for fitting.  And then I just have all the suspension bushes to do. A comprehensive kit is on the way... Lots to do before the Ararat hill climb. Cheers guys 🍻   
    • funkymonkey
      Howdy Y'all

      By funkymonkey · Posted

      Nice car! I’m glad folks in the US have gotten past the FnF and are buying real cool cars like the 260RS I was with a bunch of mates in Portland about a year ago and spotted a green Stagea (just a regular 2.5T AWD) parked about 2 blocks away and they were like “a what?” So I made a bet with them for a round of beers and said “ok one of you run down there and tell me if the steering wheel is on the correct side” 5 mins later the American comes trudging back up the hill and goes “he’s right guys. Ok what beer do you want?”
    • Dose Pipe Sutututu
      Starting again

      By Dose Pipe Sutututu · Posted

      Should replace OR drop the tank, give it's good clean. Might be worth replacing that entire fuel level/pump/cradle thing with this: https://frenchysperformancegarage.com/products/fpg-s13-180sx-r32gtst-single-pump-hanger-kit-billet-hat-6-v3-fpg-089?gQT=2  
    • R33_Guy
      Speed Sensor replacement

      By R33_Guy · Posted

      Thank you so much for the help
×
×
  • Create New...