Jump to content
SAU Community

Cams For A Rb20

nytrda

By nytrda,
in Forced Induction Performance

 Share

Recommended Posts

nytrda Community Regular

nytrda

Posted
Posted

Hey guys at the moment looking at what cams to get. I am also looking at cam gears aswell. I currently am getting turbo hiflowed, I have gtr injectors ready to go in, power fc, bosch 040 fuel pump, fmic an full 3" exhaust turbo back with 3" custom dump so yeh any help would be much appreciated.

Jamie

Link to comment
Share on other sites
yogi000 Mentor

yogi000

Posted
Posted

i got myself some tomei 256 8.xx cams for my rb20, i havent installed them, but i got them cause i dont HAVE to change springs and shit to install them and also they are a mild upgrade and able to keep a fairly resonable idle with them.

Will see how it goes in the coming weeks

Link to comment
Share on other sites
carl h Proficient

carl h

Posted
Posted

i run tomei pro cams (260/8.9) in my rb20 and they have been forking mint.

super smooth idle with the occational hickup, but man you cant tell the diffrence.

power gains alone were worthwhile they really opened up the top end of the motor, but thats assuming you have a turbo that can push air at high rpms.

Link to comment
Share on other sites
carl h Proficient

carl h

Posted
Posted

well heres a run when the car was still untuned and before i melted a hole in a piston.

if i can get the turbo to spool up sooner (a rebuilt motor should do it in much less time) then it will have a much better powerband.

post-9364-1137423803.jpg

Link to comment
Share on other sites
  • 5 weeks later...
Turbine Collaborator

Turbine

Posted
Posted

Hi guys,

I'm at the moment attempting to install a set of RB26DETT camshafts into my RB20DET.

Everything is fine with the cams themselves fitting into the head, cam brackets fit nice and torque up well with no binding. The problem starts with the lifters.

Now I know I can run with the hydraulic lifters. We tried this on our R32GTS4, the engine ran quite well above 2200RPM. It had idle issues but we kind of knew that would happen. We removed them and put the standard cams back in so we could drive the car to the last Skylines show in town.

I thought with the hydraulic lifters in our race car it was a bit of a no no, mainly for the high RPM operation. So i got hold of a set of solid lifters (RB26DETT). For some reason, even if i installed them into the head above the valve springs, it looks like they will not make up the distance to the base circle of the cam lobes.

Will this be fixed with the shims between the valve and lifter??

Seems like alot of room to make up their, maybe up to 1inch

Maybe someone can shed some light on this subject for me.

Cheers

Turbine

Link to comment
Share on other sites
grandmasterb Grand Master

grandmasterb

Posted
Posted
Hey guys at the moment looking at what cams to get. I am also looking at cam gears aswell. I currently am getting turbo hiflowed, I have gtr injectors ready to go in, power fc, bosch 040 fuel pump, fmic an full 3" exhaust turbo back with 3" custom dump so yeh any help would be much appreciated.

Jamie

im looking at getting cams for my Rb20 at the moment.

I was recommended to get:

TOMEI PONCAM Camshaft and Pulley Kit

PONCAM Intake and exhaust camshafts and pullies. 256 degree intake and

exhaust, 8.50mm lift camshafts.

and at a bargain price to i think!!!

Cheers GMB

Link to comment
Share on other sites
Roy Grand Master

Roy

Posted
Posted

No they are not bolt in. The head needs to be relieved for the sweing of th ecam lobes. You woud need different springs....

The one thing thats not clear, is will hydraulic lifters be abel to handle that sort of lift, as surely that sort of lift would mean rather high acceleration/decceleration.

Looking at engines liek the RB26, Evo motors etc that run big lift cams they all seem to use solids...must be a reason.

Link to comment
Share on other sites
gt-t_r34 Mentor

gt-t_r34

Posted
Posted

theres tomei cams on nengun for rb20 the are 256 would they be ok i only wana do cam shafts and cam gears engine wise and would they bring boost on better with a bigger turbo? one other guy on here put in 260's and got about 300rpm better boost response

cheers simon

Link to comment
Share on other sites
Roy Grand Master

Roy

Posted
Posted
well i would love to but i dont think the gains are worth it with my set up for the money i would spend!!!!

Dont listen to me. I just want to see someone go all out on an RB20 so we can all see if they can make decent power :P

But the cams themselves are no more expensive, adn the mod to the head is straightforward DIY stuff. Only you will have to remove the head to replace the springs...what i need to know is do hydraulic lifters handle this sort of lift, or is it a matter of the springs have to be so damn stiff that its best to run solids????

Link to comment
Share on other sites
MADGT4 Mentor

MADGT4

Posted
Posted

Now i'm new to the whole cams thing but am also looking to possible pair up some cams, cam shafts and a turbo along the lines of a 2530/35 to my RB20.

I'm not one for outrught power, i just want response.

Obviously knowing that cams and cam shaft will improve response, are there any real gains, like after fitting some cams and cam gears will you go "wow holy shit i can feel it!"

Or not?

Just more or less a little research and a suggestion on what to go with with a 2530 size turbo.

PS. Is it a wank factor to have the rough lumpy idle?

I dunno about you guys but i love it!

Link to comment
Share on other sites
grandmasterb Grand Master

grandmasterb

Posted
Posted
Dont listen to me. I just want to see someone go all out on an RB20 so we can all see if they can make decent power :D

But the cams themselves are no more expensive, adn the mod to the head is straightforward DIY stuff.  Only you will have to remove the head to replace the springs...what i need to know is do hydraulic lifters handle this sort of lift, or is it a matter of the springs have to be so damn stiff that its best to run solids????

Not oging all out but going to be running a very similar set up to your Roy :D

Link to comment
Share on other sites

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

    • bigboss59400
      BNR34 identify this connector please

      By bigboss59400 · Posted

      that is correct to be more precise, this sensor goes to a loom which contains only the flat blade single terminal (to connected to this sensor) and then the connector shown in my first post. This loom is tied up to one of engine hairness
    • Victory
      Farewell Neil.....hope the tracks are awesome where you are going

      By Victory · Posted

      This is really sad news to hear and it has taken me a few days to come to grips with the loss of Neil.  Neil was very straight forward and I have always respected his honesty and how he called it how it was.  He was a very knowledgeable man and was always available to provide advice when you needed help to solve a problem because he would have encountered the same issue in the past and could explain how he solved it.  Neil will be missed by many members of the Skyline family.
    • klutched
      GOT SUM's RB34

      By klutched · Posted

      Dropped the car down to my mates shop on the 19th to get it on the dyno. Ran the motor in and dropped the running in oil and filter and filled it up with some engine oil.  Monday arvo I went down and we got a tune in her. Had a fun time trying to get it to hook up on the rollers. We end up having to roll into the throttle, reaching full throttle at around 6k. Made 23psi on gate then tapered off to 20psi up the top and spat out a healthy 700rwhp.  We had a slight voltage issue which was dropping ecu volts to around 11.8v so we called it quits and on Tuesday I went down and ran a couple of new power feeds to the ECU and DBW relays. Have yet to test it as we were trying to get things sent into the ECU from the TCU over CAN. We've now got oil temp, programme switch and gear position. Still working on gearbox speed, but have been told what to do so hopefully that will sort it. Once we've got speed working, we can start setting up the gear shift cuts and do some clutch adaptations in the TCU.  Should have the majority of it setup this week and go over the tune to see how it is now with the new power wire.  Was slack this time, didnt get any full runs as I was watching the TCU data on the laptop. Snapchat-322660241.mp4
    • DONKEYP
      Grinding Noise R32GTR😖

      By DONKEYP · Posted

      Ok, good idea 👍
    • silviaz
      Power Steering Fluid Leaking Consistently

      By silviaz · Posted

      Not until I googled it, now I remember lol. Seems like it's just to clean it up. But it doesn't stop the leak, I have a leak issue though? Thinking whether I need a new bottle, surely not lol.
×
×
  • Create New...