Jump to content
SAU Community

Max Cam Lift Before Grind

NRB26

By NRB26,
in Engines & Forced Induction

 Share

Recommended Posts

NRB26 Enthusiast

NRB26

Posted
Posted

Have done a little research and I'm still unsure what the max lift is before you have to grind the lifter walls. Some say 9.15. Some say 9.5. I'd like to know what size cams people have fitted without grinding the head. Are there differences in rb26 heads? The guy that sold me the cams assured me that they were straight drop in.

Link to comment
https://www.sau.com.au/forums/topic/355754-max-cam-lift-before-grind/
Share on other sites
NRB26 Enthusiast

NRB26

Posted
  • Author
Posted

Some photos of the cams I tried to fit. Wound the engine over by hand and it locked up. Only 9.25mm lift. 32mm base circle and 41.25mm lobe. This was only the exhaust side that I had an issue. Inlet spins freely. Ground lifter walls down to clear lobe. Now OK :)

Has anyone seen this before?

post-61828-0-05479200-1299063525_thumb.jpg

post-61828-0-92709400-1299063805_thumb.jpg

post-61828-0-67234600-1299063871_thumb.jpg

post-61828-0-48482100-1299063929_thumb.jpg

post-61828-0-15700300-1299064104_thumb.jpg

The Dan Grand Master

The Dan

Posted
Posted

Some photos of the cams I tried to fit. Wound the engine over by hand and it locked up. Only 9.25mm lift. 32mm base circle and 41.25mm lobe. This was only the exhaust side that I had an issue. Inlet spins freely. Ground lifter walls down to clear lobe. Now OK :)

Has anyone seen this before?

Yes, that's because you are using 32 base circle. You need to use reduced base circle for anything over 9.1

The Dan Grand Master

The Dan

Posted
Posted

Would that still be considered as "drop in" camshaft?

That depends on who makes the camshaft and what they specify it to be.

But anything different than a step1 or type1 for most manufacturers would be considered modified. I don't think any of them do a 9.25 step 1. I'm guessing it's a Tomei?, if that is the case, then 9.15 is the highest 'drop in' they do from memory

Although not sure Tomei even do a 9.25 and cbf looking

djr81 Grand Master

djr81

Posted
Posted (edited)

That depends on who makes the camshaft and what they specify it to be.

But anything different than a step1 or type1 for most manufacturers would be considered modified. I don't think any of them do a 9.25 step 1. I'm guessing it's a Tomei?, if that is the case, then 9.15 is the highest 'drop in' they do from memory

Although not sure Tomei even do a 9.25 and cbf looking

Yeah they do - 256 degree 9.25 lift inlet & exhaust.

Base circle is 32mm.

Edited by djr81
  • 7 years later...

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

    • Predator1
      Thanks for the add

      By Predator1 路 Posted

      Big single, and seqy. #sorted
    • GTSBoy
      Thanks for the add

      By GTSBoy 路 Posted

      The R32 suffers from an instrument binnacle that is uncomfortably close to the design of a VN Commodore's. But beyond that, the layout of the rest of everything, and the materials (ie the vinyl coverings on dash, armrest, etc) are acceptable, and the patterns on the fabrics are not as blergh as those in the R33. And R33 seats are....quite unattractive. I know it's only small details there, but I reckon the R33 got worse than the 32. But the big blergh is the overall shape of the dash on the R33. It's just has that whole Maxima/Pulsar sort of look to it. Nothing special at all. Generic Nissan sedan. Whereas, at least the R32 dash/binnacle was different. Less a wide expanse of boringly curved plastic. More a "cockpit" sort of look, even if nowhere near to the degree that the A90 Supras got. R34 seats look good on their own, until you realise that they are indistinguishable from the shape and fabric on 70 other Japanese cars. And the foam bolsters on them suffer even worse than the earlier cars. Other than that I don't really have an opinion the rest of the R34 interior. I took the bits of the R34 I wanted (brakes and engine) and added them to the best external appearance Skyline in the modern era (the 32). So nyerr!
    • Dose Pipe Sutututu
      R32 Gtr Long Term Love, Now Project

      By Dose Pipe Sutututu 路 Posted

      Can I be your first customer? I would like hard lines done for the fuel system, 8AN up and 8AN back and the underside wire wheeled and coated (brush or sprayed) with that black tar shit.
    • MBS206
      Thanks for the add

      By MBS206 路 Posted

      Speak for yourself, I love the R33 interior. 32 is blergh. I like the 34 interior too. Then you start getting much newer in most cars and they all turn back to blergh. 馃槢
    • Kinkstaah
      ugently need expert / experienced opinion

      By Kinkstaah 路 Posted

      500-600hp into a RB is already 'sinking endless amounts of money' into an engine. Especially a 30 year old engine. Unfortunately this is the RB Game. Considering stock power (or at least stock components) will do ~360whp on 98 by simply turning up the boost on the stock gear on a RB26, that would be where I'd say the cutoff point for "sinking endless amounts of money into the engine" Cause to even do this reliably you'd probably need to replace all the bits anyway cause they're old, starting your sinking journey anyway. I reckon the least painful way is rebuilding the engine to make 50hp over stock lol. The 'plan your ownership around a rebuild' was a common saying 15 years ago.
脳
脳
  • Create New...