UK-spec cams, j-spec engine?

[richardharmon]

Does anybody know for sure if UK-spec TT cams will fit a J-spec TT engine and if so would it make much difference (if I’m right in thinking the UK-spec cam duration is slightly higher that the J-spec)? I was just wondering because I might have the cams out anyway to change the valve stem seals, thought it might be worth doing if I could find some cheap UK cams. Obviously I would rather get some HKS or Jun cams but finances restrict that particular exercise at the moment :). I just feel like I should do something since the cams are going to be out anyway, seems like a missed opportunity otherwise!

Cheers,
Richard

[Alex]

www.mkiv.co.nz has the specs for the j-spec and export spec cams...

If I recall correctly only the intake has a longer duration on the Export/UK spec.

It might make a difference but it might not be big enough for the work involved.

If you do do it, before and after tests would be really helpful to the community.

[richardharmon]

Thanks, I wasn't sure what the differences were. I know what you mean about the work involved, but as I'm going to be taking the cams out anyway it might be worht a shot.

:thumbs:

[eyefi]

the cam is tuned for mid range, to suit the ceramics. i'd rather keep the mid range rather than move the curve to the left a bit

[Ian C]

Or even to the right? :)

The HKS cams, 256/264, really boost the top end in a driver-can-feel-the-difference fashion, and I can't say I noticed a loss low down. UK ones - probably not so much of a difference. The J-spec cams are stupidly mild compared to others though, so if you do find UK spec ones, why not drop 'em in, get the experience at least :thumbs:

-Ian

[MONKEYmark]

i have 264/264 and they seem strong in midrange and low down they feel great. i got mine because i was getting a cam belt change so went with cams and cam gears too. i would stick the uk cams in too as it would make sence to try them. get a post up asking for some uk cams.

[richardharmon]

I was thinking about putting a post up, I don't know how much I should pay for a set though, especially when they *might* not make all that much difference, anyone got any idea what the second hand value of UK cams would be? I understand there may be some reluctance to answer that question as nobody wants to piss-off anyone selling a set. If anybody has any idea you could PM me and I promise not to disclose the information. ;)

[eyefi]

yeah, to the right :) sorry about that

they r basically redundant so u shouldnt pay much above nothing really. there r quite a few new zealanders and aussies who've done it when they swap over to us spec turbos.

[Ian C]

I paid £350 for a set of HKS 256in 264ex cams with 5000 miles on them. That should give you a guideline for pricing x0,000 mile old UK stockers :D

-Ian

[richardharmon]

Not much is the answer then :D

[richardharmon]

Right, I've posted in the for sale section, let's see who wants to let me have a set for a song. :innocent:

[MONKEYmark]

my mate has a dead uk spec engine and he has just bought a new engine

will send him an email if he wants to sell his uk spec cams
do you need the cam gears or are jap and uk all same?

[richardharmon]

Cheers!

Originally posted by MONKEYmark
...do you need the cam gears or are jap and uk all same?

Good question, anyone know for sure?

[Ian C]

They are the same.

-Ian

[richardharmon]

Thanks Ian :thumbs: