Jun 272 Rb26dett Cams

[johnnyt]

Hey guys just picked up a set of jun 272 10.8 lift for my gtr, i thought they were slightly less lift but after checking model numbers.. i found they were 10.8s

model numbers

1004m-n101r

1004m-n201r

just wanna know what other modifications will need to be done to fit them and wether they will suit my needs or not.. so ive got all the info before i go see my head machinist

rb26dett

gt3582r 1.06 exhaust

forged bottom end

head has tomei valve springs and guides

trying to reach the 400kw mark with a gt35

thanks

[SimonR32]

you will need

bronze valve guides

head machined to clear the cam

titanium retainers

upgraded valve springs

new shims and/or buckets

[N I B]

Need Cam buckets with those Cams, A shim that tall will cause trouble and would need to be custom made.

Their big enough Cams for the power you want

[johnnyt]

through some research it seems like if im going to change buckets i'll have to use tomei items.. is there a suitable product in aus i can use?

is it completely neccasary for me to use the titanium retainers? will the standard work?

[N I B]

Standard retainers will work but stock springs wont. The springs will coil bind well before that much lift.

[T04GTR]

supertech do a taller (1mm) bucket. a few jap company's do the buckets.

what tomie springs do you have? type b's or c's will do.

[johnnyt]

yeah sweet.. ive got tomei springs, im just trying to find out what model they are now though.. as they came in the head i bought

Another thing i was thinking is with such a high lift am i going to have problems with valve to piston contact? im using acl slugs

thanks to4gtr.. ive used supertech before so i'll chase up see what the buckets are worth, its more of an availabilty thing im worried about!

if anyone has found any other brands that have worked for them, i would be stoked to hear from you!

i may end up selling/swapping these cams for smaller versions if this gets too hard

[T04GTR]

yeah sweet.. ive got tomei springs, im just trying to find out what model they are now though.. as they came in the head i bought

Another thing i was thinking is with such a high lift am i going to have problems with valve to piston contact? im using acl slugs

thanks to4gtr.. ive used supertech before so i'll chase up see what the buckets are worth, its more of an availabilty thing im worried about!

if anyone has found any other brands that have worked for them, i would be stoked to hear from you!

i may end up selling/swapping these cams for smaller versions if this gets too hard

you could swap them for my apexi 280/11.5mm ones nar pm me if you get fed up

i do have a variety of springs that would suit aswell VALVE SPRINGS FOR HI-LIFT CAMS

[johnnyt]

ok pulled a cam out and it looks like this head has already been modified to allow for big cams..

without pulling the retainers out could someone confirm these are standard retainers?

and does anyone know the measurements of the standard buckets? just to make sure the ones i have are standard..

heres some pics

pic of bucket with a shim inside

Edited September 16, 2009 by johnnyt

[johnnyt]

anyone recognise the retainers i posted? are they standard?

[T04GTR]

thry are not standard. and look quite good.

buckets dont look factory, if they mesure 17mm from the surface of the cam bearing to the lifter there stock. if 16mm then happy days. (with the shim in place)

[T04GTR]

not sure about the machined surface on the retainer but,

[johnnyt]

Ok i think this head had 280 cams before.. and the fella i bought it off had standard cams installed and shimmed in, could it be they machined the retainers down so a standard 2.3mmish shim could be used? looking at it the retainer is quite deep.

would really be interested to know what retainers they are.

sorry to4 didnt really understand how i should measure the buckets.. from the cam bearing to the lifter?

cheers for your help mate!