Rebuilding Rb26 Head

[ahh 33 s2]

hey lads.

im nearing the end of purchasing for my 26 build.. not 100% on how the valve train works and what is actually in there

so far i have got

tomie

cams

guides and

valve lifters

and apexi

springs and retainer

obviously still need valves but not sure on what else

any advise on what else is needed and if new from nissan would work or aftermarket is needed would be swell,

BTW dont have a power goal as such, just going to run a GT3582R at 25 pound, with the .8 rear

thanks

Dan

[Swiper the Fox]

hey lads.

im nearing the end of purchasing for my 26 build.. not 100% on how the valve train works and what is actually in there

so far i have got

tomie

cams

guides and

valve lifters

and apexi

springs and retainer

obviously still need valves but not sure on what else

any advise on what else is needed and if new from nissan would work or aftermarket is needed would be swell,

BTW dont have a power goal as such, just going to run a GT3582R at 25 pound, with the .8 rear

thanks

Dan

stem seals and if you have to spend the cash cam cap studs.

[R31Nismoid]

What is wrong with the current head - ie what needs replacing?

A GT35 running 25psi won't even stress a factory head in good condition, so don't get too excited spending money everywhere as you won't see any benefit.

[shanef]

1mm valves on the exhaust, std inlet.

I hope you went a nice size cam aswell.

[ahh 33 s2]

yeh went pro cams. 270 10.8

the reason i want to do the hole head is cos i got the motor with a loud noise and unknown history.. turned out the bottom end was fine no spun bearing or any thing like that, so thats been fully rebuilt and dont want to take any risks with the head so start from scratch there aswell..

i have read enough to no that i didnt need to go all out with the head but dont want to risk it, might as well do it right the first time

dan

[shanef]

If you do go the 1mm valves, make sur eu get the head ported by someone who has alot of experience and results, or u could go backwards.

[Swiper the Fox]

If you do go the 1mm valves, make sur eu get the head ported by someone who has alot of experience and results, or u could go backwards.

Oversize valves sure makes it a hell of a lot easier to pick the seat up after fitting new guides...especially if the head has done a few miles and/or its been reco'd before...also makes the port job more effective and allows a nicer bowl shape.

[bigmikespec]

Digging up an old thread here.

Is Tomei the only one who doe upgraded cam cap studs for the RB26 head? Unless I am blind I did not find anything in the ARP catalogue.

[Gerg_R31]

Unless your intending to run over 100 pounds seat pressure on the springs, there is no real benefit over the standard cam cap bolts

But yeah they are also made by arp

[bigmikespec]

There is nothing in the "camshaft bolt" section of the ARP catalogue...?

[black bnr32]

looks like arp has bulk fasteners on page 79, which are rated at 180ksi tensile strength. Looks like grade 12.9 fasteners are rated to 1220mpa or 177ksi tensile, so about the same as the arp stuff.

http://euler9.tripod.com/bolt-database/22.html

tomei lists their studs as SCM435 material. see if you can find the tensile strength of it, as I gotta run, and then compare.

[elrodeo666]

Naprec http://www.naprec.co...26/0605_06.html

[bigmikespec]

Thanks for that ^^^

I dont think ARP do them specifically. Might just go for the Tomei ones considering I need the buckets too.

[r32-25t]

Ring rocket they have the arp ones in stock