270d, 10.25mm Lift Cams On Inl And Exh

[r33cruiser]

no info on here for rb25det

got- solid lifters and springs, rods with bearings, forged pistons

but recently some of u guys said i should upgrade my 256, 9.25mm cams.

im asking.. will 270..10.25mm plop straight in?

will i need modifying? prefer not to lol.

[Adriano]

No. the head will need to be clearanced, some people will do it with the head on, but i dont.

[skylinekid]

No. the head will need to be clearanced, some people will do it with the head on, but i dont.

mate if u can find the 10.25mm lift valve springs from tomei but let me know cuz i want sum aswell as the 10.25 cams and adjustable shim bucket conversion fron 25 head they claim they have all been discontinued

[RB30-POWER]

ECR33 RB25DET-

High lift camshaft could not be used for ECR33 RB25DET because NVCS oil pipe is running beneath the valve spring and it restricts the amount of the intake valve lift. Neither, could strengthen valve spring have been manufactured according to its construction. Now, we developed RB25DET special intake valve retainer that enables corresponding to high lift camshaft by 10.25mm, by enlarging the amount of valve lift. Deceleration of the valve can be also secured by applying strengthen valve spring, which is required for the high lift camshaft and high rotation of the engine.

and some info in here, down the bottom, may or may not be of interest, you did say you can't find anything much afterall.

http://www.calaisturbo.com.au/showthread.p...light=rb25+cams

[skylinekid]

and some info in here, down the bottom, may or may not be of interest, you did say you can't find anything much afterall.

http://www.calaisturbo.com.au/showthread.p...light=rb25+cams

so essentially wat does ne one need to fit theses biggish cams to an rb25 head..

[r33cruiser]

yea...my thoughts exactly man.

y would they make them for a ecr33 if they CANT EVER be used??

so far we have: yes, but needs to be machined for clearance.

and NO, NVCS issues.

so has anyone actually using 270, 10.25mm lift cams. or similar big lift cams?

need help.

WHAT IS THE BIGGEST DURATION AND LIFT CAMS PPL HAVE USED IN A RB25, WITHOUT MODIFICATION (easily fitted)?

Edited January 11, 2008 by r33cruiser

[shanef]

they can be used, but u gotta convert it to a solid lifter head

ring jhh engineering in brisbane and speak to john hill

[r33cruiser]

thanks shanef such a damn relief- phheeeewwww..

well i have tomei valve springs and a solid lifter conversion.

so can i definitely run these 270, 10.25mm lift, without modification?????.. dont want to waste money

http://www.tomei-p.co.jp/_2003web-catalogu...m_RB25.html#pro

^^^^

bottom of that page are the ones im looking at

Edited January 11, 2008 by r33cruiser

[shanef]

thanks shanef such a damn relief- phheeeewwww..

well i have tomei valve springs and a solid lifter conversion.

so can i definitely run these 270, 10.25mm lift, without modification?????.. dont want to waste money

http://www.tomei-p.co.jp/_2003web-catalogu...m_RB25.html#pro

^^^^

bottom of that page are the ones im looking at

u have to modify the head, u cant run that size cam without doing it