Heavy Duty Valve Springs

[drgnball34]

Ive been on nengun and greenline and duznt seem to be any for the NEO? I have tomei cams so prefferbaly same brand. Would R33 fit? Rebuilt engine with 2835 .8 a/r, would i even need them?

[MR331307]

Ive been on nengun and greenline and duznt seem to be any for the NEO? I have tomei cams so prefferbaly same brand. Would R33 fit? Rebuilt engine with 2835 .8 a/r, would i even need them?

Try performance Springs

or High Octane (even though i dislike them at the moment)

Edited November 3, 2006 by MR331307

[lou34]

try rocket industries here in sydney

[Spoolup]

performance springs have them

I am using them in my head

cheers

[Downforce]

Ive been on nengun and greenline and duznt seem to be any for the NEO? I have tomei cams so prefferbaly same brand. Would R33 fit? Rebuilt engine with 2835 .8 a/r, would i even need them?

If you're using tomei poncams you shouldnt need to change your valve springs.

[drgnball34]

Is it true that you shoud upgrade the springs when installing bigger cams? Due to higher lift therefore more stress on them? What about valve bounch or float? Any one suffered from this and at what power levels?

[Cubes]

Performance springs...

All though for the R34 head they are a tad more expensive than the R33/R32 items. R33/R32 items are approx $285 where as the R34 items are just over $500 for a set.

http://www.performancesprings.com.au/

[infected flow]

Is it true that you shoud upgrade the springs when installing bigger cams? Due to higher lift therefore more stress on them? What about valve bounch or float? Any one suffered from this and at what power levels?

over 300rwkw --- no problems and u havent looked hard enough tomei offer springs..

Cheers

[Cubes]

Its not so much the power levels but boost run and rpm used.

I recently had a dude pm me stating his r33 experienced valve float on its std springs (unsure if he ran cams and what rpm) with anything over 20psi.

[infected flow]

Its not so much the power levels but boost run and rpm used.

I recently had a dude pm me stating his r33 experienced valve float on its std springs (unsure if he ran cams and what rpm) with anything over 20psi.

ill just edit the first post i wrote....8-9000rpm and boost is 1.6 drops off to 1.5bar..no probs..

[Cubes]

So you run stockers or tomei?

I think it really does vary from car to car.

[infected flow]

So you run stockers or tomei?

I think it really does vary from car to car.

yep your right it does vary i run stockers doing some r&d on them actually...

[Abo Bob]

You rev to 9000 rpm Mario!?? You're a maniac!

[MR331307]

You rev to 9000 rpm Mario!?? You're a maniac!

i reved mine to 8200 with stock cams,lifters,valve springs

[R31Nismoid]

8000-8200 for me aswell.

Into the mid 300rwkw's for a while with a 100% stock head i was.

It really is luck of the draw, meaning how good condition your head is to begin with.

That will determine if you will have issues.

There are people that do get problems, and people that dont have issues with the stock gear.

I guess over time eventually you might have issues, but how long, unsure and i dont think anyone could tell you

[Abo Bob]

Hmm, I'm only revving to 7500 atm. The engine builder said it would be happy at 8000 but my power drops off a little after 7000 anyway. Maybe once I fix my boost issue it wont.

[turbo65falcon]

Hi,

Just curious if you have had your head dissasembled as i have just rebuilt my NEO head and cannot remember which springs went where. Red paint = exhaust? Green = Inlet?

Thanks. Paul.