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Rb20det Adjustable Cams?

DaShMiEsTeR

By DaShMiEsTeR,
in Engines & Forced Induction

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DaShMiEsTeR Enthusiast

DaShMiEsTeR

Posted
Posted (edited)

Hi there is a similar topic i found to this but it was for an RB25DET :wave:

Just want to know....

what are the gains on adjustable cam gears on a RB20DET 32?

Get the timing belt done as im approaching the 150, 000km mark and the 'Mechanic' advised it needs to be done. (might get a second opinion lol)

so have a few kits i am looking at (with or without the adjustable cams) not sure which way to go?

any help would be appreciated heaps :)

Edited by DaShMiEsTeR
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https://www.sau.com.au/forums/topic/193794-rb20det-adjustable-cams/
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limpus Mentor

limpus

Posted
Posted (edited)

Peak power might only rise a couple of kilowatts if it does...adjustment of the cam gears might allow you to shift your powerband around slightly...alot of people recon its abit of a hit or miss with cam gears but it can't hurt to try...

Edited by limpus
DaShMiEsTeR Enthusiast

DaShMiEsTeR

Posted
  • Author
Posted
Peak power might only rise a couple of kilowatts if it does...adjustment of the cam gears might allow you to shift your powerband around slightly...alot of people recon its abit of a hit or miss with cam gears but it can't hurt to try...

cheers mate. still sort of borderline on whether or not to get it done. But if its a hit and miss i might give it a shot.

DaShMiEsTeR Enthusiast

DaShMiEsTeR

Posted
  • Author
Posted
Probaly only minimal gains with standard cams, but still a gain.

Have you thought about aftermarket cams.

sorry thats what i was going to do. Get some aftermarket adjustable cams.

so you think either way the cams will provide a gain?

Roy Grand Master

Roy

Posted
Posted
Probaly only minimal gains with standard cams, but still a gain.

Have you thought about aftermarket cams.

I think it all comes down to the experience of the tuner and whether you are willing to pay for all the dyno tiume whilst the settings are changed and the ignition anf fuelling gets tweaked so that you actually get a tangible change in power/delivery.

Im still waiting to see a credible before and after comparison of an RB20 with some cams. Same tuner, same bolt on and support mods, only change is cams a tweak of the tune to suit.

Ceffy_SA Collaborator

Ceffy_SA

Posted
Posted
I think it all comes down to the experience of the tuner and whether you are willing to pay for all the dyno tiume whilst the settings are changed and the ignition anf fuelling gets tweaked so that you actually get a tangible change in power/delivery.

Im still waiting to see a credible before and after comparison of an RB20 with some cams. Same tuner, same bolt on and support mods, only change is cams a tweak of the tune to suit.

Hopefully this wednesday i will be adding Adj cam gears and getting another tune on the same dyno, same tuner and with the same mods (except for the Adj cam gears), ill keep people posted as it will be interesting to see what difference they make and at what settings on a Std cam stock internal RB20. Here is the Dyno sheet from my last tune on ~15 psi

CeffDynoT3GB.jpg

DaShMiEsTeR Enthusiast

DaShMiEsTeR

Posted
  • Author
Posted
Hopefully this wednesday i will be adding Adj cam gears and getting another tune on the same dyno, same tuner and with the same mods (except for the Adj cam gears), ill keep people posted as it will be interesting to see what difference they make and at what settings on a Std cam stock internal RB20. Here is the Dyno sheet from my last tune on ~15 psi

CeffDynoT3GB.jpg

keep everyone posted dude

that will be an interesting outcome :D

grandmasterb Grand Master

grandmasterb

Posted
Posted

I will be dropping the cams in my motor so hopefully will see a bit of a difference through the midrange from the 200rwks it began with.

Will post up results of before and after graphs in the RB20 thread once done :)

DaShMiEsTeR Enthusiast

DaShMiEsTeR

Posted
  • Author
Posted
I will be dropping the cams in my motor so hopefully will see a bit of a difference through the midrange from the 200rwks it began with.

Will post up results of before and after graphs in the RB20 thread once done :thumbsup:

awesome! :thumbsup:

WazR32GTSt Grand Master

WazR32GTSt

Posted
Posted

you probably won[t gain any top end but it will bring boost on sooner and shift your power curve left

this means power is available earlier across the whole rev range

...very worth it on the rb20 which we all know lacks balls below 3000rpm

haven changed cam gears on my rb20 with rb25 turbo (i made a thread about it - do a search), i say go for it!

grandmasterb Grand Master

grandmasterb

Posted
Posted
you probably won[t gain any top end but it will bring boost on sooner and shift your power curve left

this means power is available earlier across the whole rev range

...very worth it on the rb20 which we all know lacks balls below 3000rpm

haven changed cam gears on my rb20 with rb25 turbo (i made a thread about it - do a search), i say go for it!

Going slightly larger than 256 though and looking for the increase through midrange and to help bring on boost earlier :thumbsup:

DaShMiEsTeR Enthusiast

DaShMiEsTeR

Posted
  • Author
Posted
you probably won[t gain any top end but it will bring boost on sooner and shift your power curve left

this means power is available earlier across the whole rev range

...very worth it on the rb20 which we all know lacks balls below 3000rpm

haven changed cam gears on my rb20 with rb25 turbo (i made a thread about it - do a search), i say go for it!

alright cool

that would cool

evenly spread sounds like what i want

not more power but maybe an even spread of power especially before 3000rpm would be awesome haha

thanks man :thumbsup:

  • 2 months later...
GTshortie Proficient

GTshortie

Posted
Posted
Hopefully this wednesday i will be adding Adj cam gears and getting another tune on the same dyno, same tuner and with the same mods (except for the Adj cam gears), ill keep people posted as it will be interesting to see what difference they make and at what settings on a Std cam stock internal RB20. Here is the Dyno sheet from my last tune on ~15 psi

CeffDynoT3GB.jpg

So what happened with this retune with the adju cam gears? any new dyno graphs you care to share with us :P

Douse Collaborator

Douse

Posted
Posted (edited)

About the timing belt....i thought it was meant to be done at 100,000kms as well........

I would be doing it fairly quickly if you are reaching 150,000kms.

As well as you idlers and tensioners....

Edited by Douse

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