TURBO_S2K

iTrader: (8)

My only mod right now is HKS DLI, Evo 9 Turbo and 3'' Cutout with Tune
I already purchased a set of GSC S2 Cams, HKS Cam Gears and ARP L19 Headstuds for my Evo 8.
I want to rev 8K without any problems.

Which springs/retainers should I go with??
Cosworth? HKS? GSC Beehive? Ferrea?

Also which valves do you recommend?

TURBO_S2K

iTrader: (8)

anything??

evo8426

iTrader: (27)

I didn't replace retainers when I did cams and springs. I used MAP beehives. Also, there is no reason to rev to 8000rpm on stock turbo, peak power is before 7000rpm

boostfeddevo9

iTrader: (3)

Same here I just replaced the spring's with Map Beehive's and I'm running kelford 272's

GSR ONE

I'm doing a full Ferrea valve train with beehive springs and GSC S2 cams but I also plan on running an ETS FP HTA3582R in the future so planning ahead.

I've heard these springs can rev to 10,000RPM but don't quote me on that.

fre

iTrader: (4)

Kiggley is the best, but overkill for only 8k rpms. I use Brian Crower Springs/titanium retainers and rev to 8600 rpm no issues.

JNProject

do you guys know who makes map beehives springs?

mcm308

iTrader: (13)

you got the single 95# springs ?

evo8426

iTrader: (27)

A1 Technologies is what my box says

fre

iTrader: (4)

That sounds right. 95lbs of preload.

bryanf

iTrader: (8)

I would go with the GSC beehive springs, why not you have the cams already. I used this exact set up and I haven't looked back.

Bryan

Blue91lx

iTrader: (44)

I use the BC Springs/Retainers with S2s. Never had any issues.

Levar

iTrader: (85)

I personally use the GSC stage 3 springs and retainers.

TURBO_S2K

iTrader: (8)

I guess I will be going with the MAP Beehive Springs and MAP Valves and keep the stock retainers

Should I get a port polish done on the head? (stock size valves) Would it make a big difference on stock 9 turbo?

Blue91lx

iTrader: (44)

You'll make more power on less boost. Until you get a turbo capable of pushing more air, you may not see too many gains.