[Mk2] [Turbo] uprated valve springs

[mr2c8cya]

im looking to do a fresh head as a spare and not sure what valve springs to go with, I have a fresh rev3 head ported and polished with ferrera 1mm oversize valves piper cams the rpm limit is 8500rpm any sugestions welcome

[Shmed]

Piper?

That's what I went with using rev 3 head and Piper TOYSGBP285's.

Not got OS valves though, but do expect to rev upto about 8 - 8.5k

I went for single springs as dual requires some more head work I believe.

[Mike N]

You should consult the cam manufacturer for the correct spring poundage rate for that specific cam and use rev 3 followers.

[mr2c8cya]

there 270 degree cams i have been looking at brian crower springs are they any good?

[Fourveesix]

You should consult the cam manufacturer for the correct spring poundage rate for that specific cam and use rev 3 followers.

As above.
Minimum spring rate to control the valve under its operating conditions is whats required.
Excessive rates means valvetrain wear and parasitic losses ( drag) which lowers engine power.

[Shmed]

Ring Piper, they're very helpful on the phone, and their springs aren't too expensive either.

[sjm1984]

I've bought a set of uprated valve springs new from brian crower which are the same as the HKS ones but cheaper. IIRC i paid £160 for them.

I'm the same, rebuilding the head with 1mm over sized valves and HKS 264 cams and cam gears. Port and gask flowed head.

[bobhatton]

I hope you are all opening up the throats and cutting back the valve seats when you fit the bigger valves.

[sjm1984]

I hope you are all opening up the throats and cutting back the valve seats when you fit the bigger valves.

+1

And dont do the costly mistake momentum motorsport did.

6 of the intake valves were leaking and 2 exhaust valves were also leaking. Seems they just took them out of the box and just grinded them into the head

[bobhatton]

Valves and seats have to be cut, you do not grind in the valves on this engine

[Shmed]

I thought that most spring upgrades were just 'snappier' springs, rather than the physical dimensions being different?! I'm more than likely wrong though.

I haven't had my head modded to take my piper single springs, but was advised (by Piper) that if I were to use the double springs, I'd have no choice.

[mr2c8cya]

[quote="Shmed"]Ring Piper, they're very helpful on the phone, and their springs aren't too expensive either.[/quote

yes i will do in the morning see what they suggest

[Fourveesix]

I hope you are all opening up the throats and cutting back the valve seats when you fit the bigger valves.

Not to mention fitting larger valve seat inserts as just boring thru them (seen that before) can make them crack if theyre too thin.
Lots of work.

[RyanRs]

ATS do a nice set of uprated springs, i have a set in mine -not tested them yet tho as the car is still in bits however i know ats and co are using them with good results out in the USA. The springs are about 10mm taller than the stock rev3 springs and do feel a lot stiffer if you press on them.


Btw, be careful what oversize valves you use! I hear of a lot of people having serious issues with ferra 6000 series due to a whole batch leaving the factory without heat treatment!

[mr2c8cya]

i'm waiting on a email back from ats on springs, oh no i think its the 6000 series i have!

[RyanRs]

heres a link to the problems..

http://mr2oc.com/showthread.php?t=40458 ... ght=ferrea

[tarmac terrorist]

i run standard size ferrera valves with HKS valve springs on HKS 272 intake cam & 264 exhaust cam