Jump to content
SAU Community

What Camshafts For Gtst?

jeffworld2

By jeffworld2,
in Engines & Forced Induction

 Share

Recommended Posts

r33cruiser Grand Master

r33cruiser

Posted
Posted

U ARE SCREWED DUDE.

256 is pushing it. any more and u WILL WITHOUT A DOUBT, need springs and solid conversion.

also, common 264 or 260 d cams have 10.25mm lift.

i sure hope that u have some decent injectors and a ecu to smooth out the rough edges.

but its all worth it for that idle :down::rofl::D

^^of course those are procams....not poncams.

NYTSKY Grand Master

NYTSKY

Posted
Posted
U ARE SCREWED DUDE.

256 is pushing it. any more and u WILL WITHOUT A DOUBT, need springs and solid conversion.

also, common 264 or 260 d cams have 10.25mm lift.

i sure hope that u have some decent injectors and a ecu to smooth out the rough edges.

but its all worth it for that idle :down::rofl::D

^^of course those are procams....not poncams.

I have the Tomei Poncams in my car.256 are direct drop in as stated by Tomei.

Sinful Grand Master

Sinful

Posted
Posted

Jeff you want to get a set of drop ins.

really any cam upgrade thats going to be reved hard needs springs and retainers but for what you want a set of drop ins will be fine.

There is plenty of options all of which will suit your application. Just see what you can get for the money and go with it.

Sinful Grand Master

Sinful

Posted
Posted

If you want it lumpy like my car its going to cost alot more than the normal drop in option.

The cams alone become more expensive

Budget for springs and retainers. Solid lifter conversion, labour to check piston to valve clearance and set-up the rest of the head to suit.

My head cost as much to build up as the bottom end did.

Joeys car has the drop in tomei's.

Sinful Grand Master

Sinful

Posted
Posted

They are not your only option.

HKS, JUN, TODA, Tomei all offer drop in cams for the RB25. Tomei's are the most widely used though.

If you want it to be the best it can then your going to need the larger cams with the springs etc but if being budget concious then drop ins will need to sufice.

BHDave Grand Master

BHDave

Posted
Posted

If you want big drop in's then look for some second hand apexi's on japan yahoo. They made up to 280 duration but are no longer available new.

If you want easy new biggest currently available drop ins then go for hks. 256 8.8mm inlet, 264 9.0mm exhaust. I run these myself with stock lifters and springs and retain vct. As long as you keep the boost under 20psi you won't have an issue.

If you don't mind losing the vct then go hks 264/264 with adjustable gears.

You won't get any higher lift without head work and solid conversion.

Now a question, when is it surging? You have a pair of N1's bolted to the side of your 25 right?

jeffworld2 Veteran

jeffworld2

Posted
  • Author
Posted

actually adve they are gt-ss now, so it surges all the time. :(

i will shove some poncams in and hope it helps. now i have the seat and all it needs to be tracked lol. thanks guys i am decided now, we shall see what happens soon enough

Risking Grand Master

Risking

Posted
Posted

jeff the surging will pretty much be elliminated once its tunned properly this week!

You honestly have no idea what the engine is like till its been tunned and finished. GTss' are not a turbo that causes surging like you have, the tune thats running your engine is basicly the same one that was running it prior to the engine rebuild and the turbo conversion.

Dont buy cams till its done and then decided if your not happy with the surging issue.

Honestly if your going to turn it into a track car the money your going to spend on cams etc would be much better spent towards better suspension/half cage/ brakes etc etc.

The cruising surge you have is not going to effect the car on the track and it wont be nearly as bad as what it is now.

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

    • The Bogan
      Neil's R33 Gts-t Build

      By The Bogan · Posted

      It was a great, but typical track day, and some VB was ingested at the night time debrief 🤪
    • Duncan
      Neil's R33 Gts-t Build

      By Duncan · Posted

      And so, to round this out, I couldn't be happier to confirm @MBS206 has decided to buy the car. He drove down from sunny QLD with a trailer last week and it is off to its new home today. I'll let Matt confirm on next steps but I understand broadly that the plan is to leave it pretty much as is, and just get some quality wheel time with a nicely balanced car that is pretty much track ready. There are a few a jobs still to be done first but nothing too major and I think its a very smart buy Dinner last night at the Paragon with a round of VBs (mostly) for Neil
    • Duncan
      Neil's R33 Gts-t Build

      By Duncan · Posted

      Well, 50 pages and the end of a chapter for this car. We took it out for a shakedown at Wakie yesterday, and everything went well. There were a couple of niggles: - Oil cooler fitting leak - tightened, cleaned, stopped leaking - Radiator cap overflow fitting was leaking....Mark called it, the overflow fitting was threaded in and not tight....tightened, tested and held pressure - Small oil leak at the rear of the block, probably the turbo oil feed - too hot to get at it comfortably but probably just needs to be nipped up - leak at the driver's side rear brake line where it meets the hardline. Fitting wasn't loose, so Matt backed it off and back on, no further leaks - there's also a leak somewhere on the top of the fuel tank, maybe that cross over fuel line - that was has been left to fix when its on a hoist Otherwise than those niggles the car went great, turned great and stopped great so it was a very successful day out. I'm always really nervous when a car first hits the track after a long break, especially with a brand new engine as well but it was great. VID-20251011-WA0007.mp4  Big thanks to @The Bogan who dropped by and helped out, @MBS206 and my nephew Lachlan the apprentice.  Neil's wife Mel also surprised the hell out of all of us by dropping by; she's up in Tamworth these days but was travelling to Melbourne so had plausible deniability for turning up at the garage, it was great to see her but also obviously a bit sad all round.
    • perry_r33
      Skyline R33 Sedan Tail Lights S2 - (2 SETS Available) Silver & Grey

      By perry_r33 · Posted

      Skyline R33 Series 2 sedan tail lights in excellent condition. These are becoming harder to find, especially in this state.    BOTH SETS ARE IN FANTASTIC CONDITION (REFER TO PHOTOS)    ✅ No broken covers or cracks ✅ Lenses are in flawless condition ✅ All rear mounting lugs intact ✅ Comes complete as pictured ✅ Perfect for restoration, replacement, or upgrade   These lights are ready to go, no surprises just quality OEM parts.   These are definitely one of the better sets we have seen in a while. With minimal wear and tear they will come as you see. Bear in mind they are not brand new they are almost 30 years old now. To find them in this condition isn’t easy they can only be obtained on the second hand market.   Australia Wide Postage Available At Buyers Expense. Silver Set:$850 Grey Set:$850 PM Me for purchase or any other questions  IMG_2166.dng IMG_2165.dng IMG_2172.dng IMG_2173.dng IMG_2174.dng IMG_2179.dng IMG_2180.dng IMG_2260.dng IMG_2258.dng IMG_2259.dng IMG_2261.dng IMG_2266.dng IMG_2273.dng IMG_2274.dng IMG_2276.dng
    • GTSBoy
      First time Skyline owner

      By GTSBoy · Posted

      Unsolicited advice? Keep the engine as close to stock as you can. Nothing wrong with adding some boost and making a little more power, but given where you are, you really don't want to try to make it into a monster. I can't imagine the roads are up to it, and the lack of locla support when it grenades will be a ball ache. FWIW, If there is a dyno around that you can access, then brand new injectors are a good idea, which will lead you to (at least) putting a Nistune in it, which will allow you to put an R35 AFM on it, all of which will make it possible to make it much much nicer to drive and live with.
×
×
  • Create New...