Jump to content
SAU Community

Recommended Posts

Hello I did a search for cam gears on this forum and cant really find anything.

Are adjustable cam gears worth it on a rb20? Will it help with torque?

I have a stock rb20 with stock turbo. I have a full turbo back exhaust with sports cat, and a pod and return to stock piping fmic.

I am putting in a boost controller soon and possibily a rb25 turbo.

Edited by yoshiii335

Tiny benefit with everything stock, and therefore not worth the cost or effort.

Here's a suggestion for the turbo. Buy an RB20 turbo from someone in Australia (like on these forums, or Gumtree, or eBay, or whatever). It doesn't matter if it's broken, because you would get the seller to send it to Hypergear in Melbourne. He would highflow it for you and send it to you in Japan. Much better idea than running a ceramic turbo again (the RB25 turbo).

Tiny benefit with everything stock, and therefore not worth the cost or effort.

Here's a suggestion for the turbo. Buy an RB20 turbo from someone in Australia (like on these forums, or Gumtree, or eBay, or whatever). It doesn't matter if it's broken, because you would get the seller to send it to Hypergear in Melbourne. He would highflow it for you and send it to you in Japan. Much better idea than running a ceramic turbo again (the RB25 turbo).

How much does it cost to highflow it?

So adustable cam gears work when the boost is up?

Yes. They might be worth it.

Depending on what you consider worth it

You would have to spend time in the dyno to see what the engine wants.

What do you mean what the engine wants?

How much does it cost to highflow it?

So adustable cam gears work when the boost is up?

What do you mean what the engine wants?

Too many questions in too many threads.

Why do you not use tools like google to look up Hypergear and find out what his highflow service costs?

Adjustable cam gears on stock cams on an unopened motor will definitely give you SOME result. As Ben said. But the problem is that the result will likely be too small to justify the cost and effort when you could use the money and time more productively on other mods. What Ben means by "what the engine wants" is exactly that. You can really only find out where to set adjustable cam gears to get the result you're after (whether that's max top end power or a little more bite at the bottom at the expense of top end power) by adjusting them while at the dyno and doing runs to see what results you get. The result you get depends on what your engine is happy with, and that depends on what turbo you're running, how much boost that turbo might be making, etc.

But it's not simply a question of "do cam gears give you more when you have the boost wound up?" Really, the strict answer to that is yes, because when the boost is wound up everything gets bigger, including the size of changes from non-boost related mods. But, no, cam gears do not become more important as boost rises.

Too many questions in too many threads.

Why do you not use tools like google to look up Hypergear and find out what his highflow service costs?

Adjustable cam gears on stock cams on an unopened motor will definitely give you SOME result. As Ben said. But the problem is that the result will likely be too small to justify the cost and effort when you could use the money and time more productively on other mods. What Ben means by "what the engine wants" is exactly that. You can really only find out where to set adjustable cam gears to get the result you're after (whether that's max top end power or a little more bite at the bottom at the expense of top end power) by adjusting them while at the dyno and doing runs to see what results you get. The result you get depends on what your engine is happy with, and that depends on what turbo you're running, how much boost that turbo might be making, etc.

But it's not simply a question of "do cam gears give you more when you have the boost wound up?" Really, the strict answer to that is yes, because when the boost is wound up everything gets bigger, including the size of changes from non-boost related mods. But, no, cam gears do not become more important as boost rises.

Thanks I understand now.

How much does it cost to highflow it?

So adustable cam gears work when the boost is up?

To high flow it will cost you $850 including braided oil line. I do have a couple of different combinations, smaller profiles is more relatively more responsive then bigger combinations.

Power wise smallest profile can support 210rwkws with full boost around 3800RPMs, while the larger profiles can handle 240rwkws with full boost around 4500RPMs.

The adjustable cam gears helps a tinny bit of mid range. But not a very tangible amount using stock cam shafts.

To high flow it will cost you $850 including braided oil line. I do have a couple of different combinations, smaller profiles is more relatively more responsive then bigger combinations.

Power wise smallest profile can support 210rwkws with full boost around 3800RPMs, while the larger profiles can handle 240rwkws with full boost around 4500RPMs.

The adjustable cam gears helps a tinny bit of mid range. But not a very tangible amount using stock cam shafts.

I checked out your site, nice stuff. So stock full boost on the rb20 turbo is at 5600 rpm, so having a turbo come on full boost by 4500 is good, correct? Do you have an option to get me to 400hp with similar responses for street?

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

    • It is a kunfine Android screen . Does anyone know the wirering diagram of the fuga ??
    • just an update to this, poor man pays twice  Tried sanding down the pulleys but it didnt do the trick. Chucked another second hand alternator in the na car which I got for free off my mate and its fixed the squelling. Must have been unlucky with the bearings.    As for my turbo car, I managed to pick up a cwc rb alternator conversion bracket + LS alternator for 250 off marketplace, looked to be in really good nick. Installed it , started the car and its not charging the battery.... ( Im not good with auto elec stuff so im not sure if this was all I needed to do but I verified such by using a multimeter on the battery when the engine was running and I was only getting 12.2v )   I had to modify the earth strap for the new LS alternator , factory earth strap was a 10mm bolt which did not fit the bolt on the LS alternator which was double the size so I cut it off , went to repco bought some ring terminals that fit, crimped it onto the old earth strap and bolted it up to the alternator , started the car and same issue. Ran like shit and was reading 12.2 at the battery.  For a "plug and play" advertised kit thats not very plug and play but alas.  My question is , am I missing something ? Ive been reading that some people recommend upgrading the stock 80 amp alternator fuse to a 140 amp but I dont see how that would stop the alternator charging especially at idle not under load.  Regardless ive pulled it out and am going to get it bench tested by an auto elec tomorrow but it would be handy to know if ive missed something silly or have done something wrong.   
    • My wild guess is that you have popped off an intake pipe....check all of the hoses between the turbo and the throttle for splits or loose clamps.
    • Awesome, thanks for sharing!
    • To provide more specific help, more information is needed. What Android screen? What is its wiring diagram? Does the car's wiring have power at any required BAT and ACC wires, and is the loom's earth good?
×
×
  • Create New...