ok so i know a bit about cars... how to build them... how to make/weld stuff etc... at the moment i have a turbo 4k ke70 as my daily driver. i do all the work myself and tuning etc..

 

i've built a 5k for my sisters ke35 but that was a simple rebuild with ported head etc..

 

now i'm about to re-build a 5k i scored for cheap.

 

so far i plan to use factory pistons...

acl geodgen pins and rings/bearings

3 angle the valves and port the head.

i'm gonna try the holden lifters and a12 pushrods.

 

BUT when i come to the cam i'm unsure of what to do. my local guy just reconmened using standard duration etc but just upping the lift to about 400". i've looked around and everywhere that has any info is in reguards to n/a motors and with the turbo hanging off the side i thought you were ment to change the overlap to suit but i have no idea as to what specs would be good.

 

btw. i have equal length headers and a vf10 turbo in a mazda 4bolt housing. its blow-through with intercooler etc.

 

any suggestions as to cam specs would be overrated! as i thought the 5k being outta a van the cam wont really suit big power or stret driving.

 

Todd

I thought that cam wouldnt matter so much cos you're forcing a shitload more air into the engine anyway?

 

Fuelling is what i thought it was mainly about.

maybe the overlap helps the turbo spool or something???? i jus don't know :D

more lift and less duration, otherwise you blow your boost out the exhaust.

 

a smallish cam with good lift would be the go.

to much valve overlap and it'll take to long for the turbo to spool up(come on boost).

Basically at the end of the day, you have to match the camshaft powerband

to the turbo that is used powerband, what''s the IHI vf10 out of?? IS it the Liberty

camshafts definitly matter in a meduim to full on turbo motor, there is only so much air you can

cram in to a motor, and in the end the camshaft dictates how long and how much air goes in.

cheers

darern

Edited February 26, 200620 yr by untubbed_20

a vf10 is a lecacy rs. as far as i know the liberty didn't come out in nz as far as i can remember and i think they had vf12's and were bigger than the vf10 and vf8's

 

so a standard cam with more lift would be the go? and perhaps a little less duration.

Yep, liberty came out with 2 turbos depending on yr.

the vf10 and the TD05, something with around 270 degrees duration

would be good and not to lumpy, but make sure you tell them it is for a

turbo car, i would get Tighe camshafts to do it

cheers

darren

i would get Tighe camshafts to do it

 

You bet me to it.

I think alot of guys on this forum would've recommended these cams to help you out on your turbo 5K project

 

There should be a thread lying around in the archives somewhere possible with a part number on one cam used on a 5K with FAI

unfortently i'm in New Zealand so i'll be using a local cam grinder.

 

could anyone tell the standard specs for a 5k cam? please