Performance Valve Springs

[lcxu105]

Hi everyone.

Looking at fitting performance valve springs in my 25 30 neo.

Just wanted to know what everyone thinks of them any experience that anyone has had with them.

Can't seem to find much info of them on the net.

[lcxu105]

Eg what boost they can handle and lift.

[r32-25t]

Wrong section, will find more help in the forced performance area

[Shoota_77]

Check the seat pressures VERY carefully. A lot of the Jap branded springs are pretty light. The BC (Brian Crower) have good pressures and well priced. I'm sure there're others that are good too.

[lcxu105]

Can admin move post to forced profamance please

[89CAL]

I have them with poncams and 27psi of boost. Havent noticed any issues. I dont have a dyno sheet to prove they are 100% fine however

[KiwiRS4T]

If you buy from someone like Kelford Cams http://www.kelford.co.nz/

tell them what your set up is and they will supply suitable springs.

[lcxu105]

Type b poncams 260 9.15.

8.5 to 1 comp.

[SiR_RB]

They will be fine with that duration/lift camshaft

[lcxu105]

Was only asking as I spoke with JHH cylinder head engineering and they said not to use them as they break.

[lcxu105]

Probably just want me to spend twice as much for their setup.

[SiR_RB]

Go the Brian crower ones or the proven supertech singles

[JustinP]

I have them in my Neo with the same cams. Will be running close to 30psi, although I still havent got mine going, so I can't really comments on them haha.

[lcxu105]

Don't understand why people keep saying Brian Crower he does not even do a part for the RB25 Neo.

Only has RB 26 listed on his web page.

Supertech don't list them for a neo either.

Edited June 26, 2016 by lcxu105

[R31 drift pig]

I also have a set for my 33, using camtech 264/9mm and 268/9mm cams, Using PVS springs and retainers, new OEM lifters, HKS cam gear and timing belt, retaining VCT.

I also have installed them yet, so I cant comment on them in a RB25, But I had a set in my HQ ute with blown/injected 304, and never had an issue. Why I used them again.

They will be absolutely fine for what you need, they're designed for 10mm lift.

Allan's a good guy to deal with as well, give him a call or drop him an email and he'll answer any questions you have.

[iruvyouskyrine]

I have them in my Neo with the same cams. Will be running close to 30psi, although I still havent got mine going, so I can't really comments on them haha.

What ones do you have exactly?

[GTR_JOEY]

I had jap soft slinky springs with tomei cams...

I now have a new engine and new springs because of it

Ferrea duals

[lcxu105]

Has anyone got a link to the supertech valve springs for the neo head please

[KiwiRS4T]

Has anyone got a link to the supertech valve springs for the neo head please

Have you had a look on the Supertech website?

e.g.

http://www.supertechperformance.com/s26918-nissan-valve-spring-kits?m=5331&ec=328&em=5449

[lcxu105]

I thought that was for the 33 head with solid lifter conversion