Jump to content
SAU Community

How Do I Install Tomei Poncams Into Rb25?

christo76

By christo76,
in Engines & Forced Induction

 Share

Recommended Posts

christo76 Apprentice

christo76

Posted
Posted

Hi,

Looking for some help with cams... I've just bolted up a GT3076 A/R 0.6 with internal gate to my RB25 series 1 and I have a pair of Tomei Poncams 256 degree 8.5mm lift I would like to drop in. I'm not looking to get any real power gains from them, but just to move the powerband round, for more response and and earlier spool up, would these cams be adequate for the job? The cams came with the option VCT retained, what is this about and is there any tutorials or DIY's on instalment of these cams?

christo76 Apprentice

christo76

Posted
  • Author
Posted

The job itself is fairly straight forward if you have good mechanical skills. Download the RB25 engine manual and there is a section that covers cam swaps. Just follow that.

I see your located in Townsville.. Any good tuners you could recommend?

NSNPWR Rising Star

NSNPWR

Posted
Posted (edited)

I fit Tomei Type-B's to my 26 a little while ago.

Some things you might like to know...despite what others might say, I got the motor to TDC and zip tied the cam gears to the belt, the gears are a little tricky to get back on doing it this way when reassembling but its def do-able. Removing and reinstalling the cams is easy enough, just unbolt the caps in the factory sequence and do the same when refitting, be very careful when retorqueing the cam cap bolts and use a small 1/4 Drive inch/lb torque wrench or similar, they are piddly little 6mm bolts and are very easy to over torque and snap!...You will likely need to replace the cam seals, its worth doing if they havent been done even if you get them off without damaging them at all. Use sufficient assembly lube on the cam lobes, lifters etc.

If youre not at all mechanically minded, I wouldnt take this on yourself, you'll need a timing light etc once youre done to check timing. Good luck.

Edited by NSNPWR
  • Like 1
boostn0199 Grand Master

boostn0199

Posted
Posted

Yeah I would recomend winding it back abit from top dead centre that way theres no chance of the valves hitting cylinder 1 or 6 as they can be abit tricky to keep straight when putting the first few cam brackets on. Doing the springs would be a good idea to save you from having to open it up again.

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

    • Kinkstaah
      NC MX5

      By Kinkstaah · Posted

      You ask for things. You specifically state you want responsiveness. A link was provided for a far superior, more responsive option. Find a MX5 workshop that will install it for you. Maybe MX5 Mania will throw on the Fab9 kit. It seems they want to charge almost 14K installed for their kit, so if they charge you $6K to install the FAB9 kit then you'll be ahead? Though really, the 2.5 with a 2860 running low boost will more or less feel as good as anything else. It's a lot of displacement and a small turbo. Think of a more modern RB26 with one stock turbo :p TBH, truth be told I've been driving my own car, and use about 50% throttle at most for 99.9% of the time. Mr Bogan is likely similar so this is all going to be semantics for the use case he actually has. (He'll be happy with anything relative to now) However, the EFR is hands down far superior in this use case. You really, really, really, really do notice it over the Garrett or equivalent.  
    • Dose Pipe Sutututu
      NC MX5

      By Dose Pipe Sutututu · Posted

      You are correct, the earlier the torque, the earlier things snap
    • The Bogan
      NC MX5

      By The Bogan · Posted

      Gents, it will be getting the MX5 Mania kit and the 2.5 will be staying where it is My query was about the 0.64 or the 0.86, whilst the 0.64 might spool a bit faster, would the 0.86 be better IRT EGT and mechanical sympathy, with only a small difference in spool And as I assume I won't need alot of boost to get to 200kw, probably around 10 psi, and with max rpm at 6500, would high EGT even really be a issue with a 0.64 I'm heading into MX5 Mania at the end of Jan to discuss the install, so any info is welcome prior to that Basically have a chat and book a time so they can throw on the turbo kit, and fit a oil cooler with a thermostat, drive in drive out of course  In other news: just finished cleaning the car inside and out, it's now all ready to get covered in bugs and dirt driving to Goulburn tomorrow to lunch,  and go for a stroll along woolondilly River with the daughter and her boy, and of course, visit my grandcats and my new grandpuppy 
    • GTSBoy
      HY51 Fuga Hybrid

      By GTSBoy · Posted

      Sounds like it has an actual problem with mode select doors, or something.
    • alburger87
      HY51 Fuga Hybrid

      By alburger87 · Posted

      Hope your all having a mean Xmas! If anyone happens to know any trick to using the insanely complex climate control system, I cannot get it to not be on dual zone no matter how many times I deselect it (will say it's not but both vents blow different temps). Also one side is always hot, one always cold 🤷
×
×
  • Create New...