Cam Clearances

[silvio]

i am rebuilding my rb26 and wondering the valve clearances for these cams

i have 264 degree by 10mm lift for the intake and 272 degree by 10 mm lift for exhaust

and for curiosity has what do people think of this cam setup?

cheers

[2BNVS]

9.7mm lift is the biggest before u mod the head to run bigger i run 272 9.7 which are biggest without modifying the head for more lift

[silvio]

what mods to the head are needed?

i do have hks step 2 valve springs if that what your saying???

Edited July 9, 2008 by silvio

[2BNVS]

id say they would have to shave down for the clearences, best speak to a workshop bout it.

[silvio]

ok ill see a work shop

do u mean i have to get the buckets/shims shaved?

cos thats y i'm asking for clearances so i know what to shave em to

[Adriano]

Need to clearance the head, as the cam lobes foul the head casting.

[silvio]

oooh nasty ok i can organise that but i still need the clearances for the cam to bucket should i use the same as standard?

[jas/slo32]

use same clearances as std if you need them i can get them from work. finishing my cylinder head on saturday with hks 272/10.5

[tacker]

if you dont have any reference from the makers of the cams then thats what i would do.

[silvio]

i was thinking i'd just use standard and the cams i bought had nothing so sounds like a goa

but i still havn't had any comments about this type of cam setup i initialy thought they were both 272 degree cams but at closer look they arnt this is y i ask is it a good thing or not so good thing?

[jas/slo32]

i run 272s with a drag setup and they work great but power band on setup is 5000rpm to rev limit. will give a lumpy idle and will definately require valve spring upgrade.as for the different sized cams i have heard of people using it but havent myself

[Swiper the Fox]

use same clearances as std if you need them i can get them from work. finishing my cylinder head on saturday with hks 272/10.5

only if using std valves...if using stainless valves you will not clearance the exhaust same as STD as the 'grow' more with heat compared to the sodium filled STD items.

[silvio]

i have put in stainless valves in so i guess i should ask the shop i got them from for the best results

i'll start another thread about the different cam setup

thanx