Jump to content
SAU Community

Jim Berry Clutch... I Don't Understand Which Flywheel To Use

TommO
 Share

Recommended Posts

TommO Grand Master

TommO

Posted
Posted (edited)

Hi all,

Firstly, I'm the first to admit I have almost zero knowledge in this area... so please keep that in mind. I had a jap twin in my GTR (ORC 709D), but after pulling it out, we found hairline cracks in the flywheel (not cool), I haven't owned the car that long so I can't tell you about the history of the clutch and it's usage.

Anyway, I'm going to go a Jim Berry "full monty"... basically, I'm trying to work out what flywheel to use. He recommended a stock one, but most people seem to highly recommend a lightened flywheel. He said he can source an aftermarket one for $600, but I don't think it was lightened. Can anyone set me straight on what I should be doing/buying? I will try to buy a 2nd hand stock item if they are good enough as I imagine it's cheaper, but I'm also happy to pay the money for a new one if it's recommended? Or can I buy a lightened one? Blah, i'm confused!

Thanks,

Tommo.

Edited by TommO
NYTSKY Grand Master

NYTSKY

Posted
Posted

There are good points and bad points about lighter flywheels.

The lighter they are the quicker your car will seem to go through the rev range.But the revs drop quicker when you change gear.Some people even opt for heavier ones(drag and drift) as the momentum of a heavy flywheel means the revs wont drop as quick.

The main difference IMO is what the flywheel is made from.The stock one will be fine as long as it has not been machined too thin.

Im looking to get a 5.5kg chromolly flywheel in the next week or two.

On a side note the HKS Cyber Evo uses a stock flywheel.

TommO Grand Master

TommO

Posted
  • Author
Posted

Thanks for the comments so far :D

I found hairline cracks in my flywheel (it does get a lot of abuse). I went to billet steel instead of cast iron to make sure I never have a problem

Was your flywheel the stock one? Which one did you go for? Lightened or not?

Cheers!!

Tommo.

Duncan Grand Master

Duncan

Posted
Posted

yeah mate it was the standard cast one. new one is lighter than stock but solid not cast. remembering it's not exactly for street use, but after seeing what happened to ben's one I didn't want to take a chance with my feet

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


  • Latest Posts

    • ARB26
      RB26DETT Sketchy boost mod?

      By ARB26 · Posted

      Thanks Duncan, that's the best info I've read. Furthermore after learning about the PCM programming side controlling the factory boost solenoid, the purpose of the solenoid is to "bleed" boost when pin 25 is earthed, thus allowing spring pressure in the wastegate actuator to overcome diaphragm boost pressure, thus closing or reducing the position of the wastegate flap creating more boost as the turbo is able to spin faster. It's pretty cool to see a designated Pill to do exactly this, would have liked to have seen it with a tiny filter over the end for those moments in vacuum.  The constant bleed pill has now been removed completely from the system and solenoid boost control has been restored once again.   Case closed 😂
    • GTSBoy
      Cas issue

      By GTSBoy · Posted

      The wideband reading is meaningless if it's not running. Why are you using shitty old sidefeeds on any engine, let alone a Neo? What manifold and fuel rail are you using to achieve that? Beyond that, can't help you with AEM stuff as I've never been their ECU/CAS combo.
    • Duncan
      RB26DETT Sketchy boost mod?

      By Duncan · Posted

      Manual boost controllers (where a little of the boost was bled off) were quite common back in the day, because they were cheap and easy. Generally they had a manual adjustment screw rather than being fixed like yours. Down side is they always bleed boost, not just when you want them to so an electronic boost controller that uses a solenoid will have less lag.
    • nash47
      Cas issue

      By nash47 · Posted

      Hello , im new here and i have A31 home build  RB25det neo stock eng / turbo  aem ems 2 blue connector  aem 3.5 map aem cas disk aem wideband connected to ecu  355 lph pump 550 nismo yellow injectors side feed aftermarket regulator  and won’t start with base aem tuner basic tune eventually flipped cas 180 degree so it triggers on correct stroke not in exhaust cycle  Now it won’t start Wideband reads 10 and 11 at lowest fuel setting  and will share calibrations soon for aem tuner i think something is wrong in aem tuner    please if you have any information, am very grateful         
    • nxh
      R34 4 door side skirt identification

      By nxh · Posted

      Legend. I ended up finding the facebook account of the owner of the first car i sent but sadly he deactivated the account. I think you’re right in saying it’s some sort of well done custom job. Really appreciate your help anyways.
×
×
  • Create New...