Jump to content
SAU Community

Recommended Posts

I have been told that it is possible to use GTR cams on a NEO. Similar solid lifters although can not use any lift higher then approx 9.5mm. Im planing to go down this route couple with adj cam gears. May sound like a silly question but could i then use the RB26 clear cam cover?

Link to comment
https://www.sau.com.au/forums/topic/193782-hks-gtr-cams-into-r34-gtt/
Share on other sites

more to the point... if i disable vct, can i completley remove the vct solenoid off the inlet wheel? Will be using tomei poncams 260 and adj inlet and ex cam gears. I want to dress up my engnine and use a rb26 clear cam cover..

cheers

only way you can use that clear cover is if you get the backing plate to bolt it too. It also wouldnt look very good in my opinion without the rb26 valve covers too. But they do look a hell of a lot better!!!!! The valve covers bolt right up.

Cant anwser your question about the vct tho. I know the cams can go in but not sure about the vct wheel on the cam itself. I think they seal differently from the 25 and 26 cam shaft but I havnt dont that modification so best to call that workshop thats done it many times posted above.

finally got around the prob with my cam choice. Will use GTR tomei poncam 260 and disable VCT. This way i can remove the hud off the stock inlet cam gear. Will the rb26 clear cam cover then bolt onto the NEO? Or will i still need GTR rocker covers????

Don't forget that GTR's have the 6 throttle valve inlet system so they can and do get away with greater valve overlap without the choppy reversion characteristics . So between having virtually zero inlet communication at idle and low turbine inlet pressure from the twin parallel turbos they can get away with longer duration cams and the extra overlap to help them scavange .

A Neo RB25 with its single turbo (greater average turbine inlet pressure) and single throttle plenum inlet manifold may not take very kindly to GTR cams .

Your call , cheers A .

thanks for the heads up....interesting food for thought...Brad from spool imports is using GTR cams for his NEO 25/30 and from the looks of his dyno graph....great results. Some 508rwhp on a low 20 psi TO4Z....I would think depending on the duration, lift and adj cam gears, this may have attributed to his success??? From memory his were 272/9.35mm

  • 3 weeks later...
i was told from my workshop that the NEO head has only 12 solid lifters. I have a spare NEO head and was also told that abit of cost is involved in getting the spare 12 on.

Best you find a better workshop........The NEO definately has 24 solids !

The inlet lifters are a little different to the exhaust lifters, but they are both solids.

cheers

ok just out of interest you can put a full set of 26 covers on your 25?

just get the backing plate for the cam gear cover and it should all work?

Yes that is what i have been told and i hope that is correct becasue i have just purchased a set for $395. On another note there was a misunderstanding between the workshop. NEO do have 24 solid lifters although 12 are steel and the other 12 are aluminium and the inlet and exhaust are different . My goal is to combine the other spare 12 steel onto the same head. What modifications is neccasary??? eg: inlet lifters into exhaust and vice versa?

They are too different. The valves and springs would have to be different lengths. I am looking at the two of them right now. The exhaust valves seem to be shorter or perhaps recessed further into the head.

Yeah the 26 covers fit onto the 25's. I've seen it done before.

really huh? Sounds major....The head is getting sent to enginering once my cams arrive. i hope there is a possible way around it and not have cost sky rocket at the same time. Is there anything even wrong with aluminum lifters anyway? It has a rb30 bottom end reving to 8k rpm max although power goal is 650rwhp...

cheers

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

    • Sorry to hear your HFM BM57 was faulty,  did you contact HFM I would hope they would be at least grateful for the information if there was some sort of manufacturing fault, you would hope they would be sympathetic even if your item was 2 years old if it had never been fitted. May I ask where it leaked from ?
    • Cats are called Bella, and Donna...  Like that poisonous plant And I remember your 2 monsters, I remember making a little bit of wee when you let them out... LOL I have already installed cat doors into the laundry where their kitty litter is, and the sun room, apart from the cat doors there's not going to be any permanent mounted stuff on the interior walls (interior doors are cheap and easy to replace) I will get a outdoor cat cage thingie once I finish the landscaping out back... https://catnip.com.au/ The only off limit areas are the main bedroom and the gym room....but, currently the cats are curled up in bed, in the main bedroom with the Mrs.....LOL, the off limits for the kittens to the main bedroom lasted about 5 minutes with Jackie I currently only have 1 free standing huge cat tree multiple level scratching post thingie in the lounge room, but, I will be getting another one soon now that I'm happy with the furniture layout in the back room and have a perfect spot for it  
    • All of this is making it seem clear that running the Coppermix twin was definitely the way to go, especially in hindsight with how insane tariffs have gotten and the strength of the USD vs yen at the time.
    • That sounds like no chance of even importing one for road registering then Now I see why Duncan wants to check LHD rules for Targa...   I wonder how "bolt in" the AWD would be if you got one imported from the US and swapped it to an AUD one
    • Not to mention they drive like a bucket of bolts! yuck!
×
×
  • Create New...