AJ PwR

Valve springs will improve engine stability at high rpm ranges so it will be better if you build the engine down the road.

Ek9

I'm in the "waste of money" camp. You haven't really articulated an improvement or problem you're trying to solve. You're trying some pre-emptive thing without any evidence it's better than the stock honda parts.

Here's a question though, are the AP2 retainers better than AP1 and do they weight more than the AP1 ones? I'd think upgrading to better AP2 retainers as long as they weren't heavier might be some decent insurance.

kane.s2k

That's really dumb if you aren't replacing your retainers. It's pretty much suicide. The excessive spring rate will eat up the weak OEM retainers so fast you'll drop a valve in no time.

John_Z

Waste of money IMO. If you want to raise your redline cheaply just use exhaust valve springs all around with quality Ti retainers.

^AnDre^

so your saying the best thing would be just to upgrade to Ti retainers instead of the springs?

^AnDre^

I have tracked the car in st.eustache autodrome a few times. Usually im out on the local tracks (i.e Mosport, Dunville, Shannonville) with my EF civic (purple with stickers galore on it... car 139 if you want to pay me a visit when you see me).. i have never been to a speedstar event.. usually through Kensia, Hada ,Dexter, BARC, or simply practice days before Touring GT series races. I might hit this next speedstar event though.

Ek9

The best thing's to leave it alone until you have some problem you need to solve. Slapping parts on there that may or may not be better's not the answer I don't think.

You want to take the head apart on a perfectly running engine but, don't really know why or what you're trying to improve? What's your goal? Why are you changing the parts? What problem are you trying to solve?

You're not going to increase the redline with any of these changes. Not without ECU mods.

As for TI, everything I've read suggests they need to be changed out every 20K miles. There's nothing really wrong with the stock ones.

kane.s2k

No, I am saying that upgrading the springs with a higher seat pressure and leaving the retainers alone is a very bad idea. You should either replace both or do nothing at all.

LagunaS2K

valve springs alone with out any other mods = waste of hard earnd cash.

Like others has stated if you do the springs replace your retainers, your dealing with stronger springs with higher tension. The OE retainers are designed for a certain amount of tension.

But if your not doing cams, or a PNP head job whats the point of dumping in that much cash for valve springs?

LagunaS2K

here is another way to put it...

it's like changing your oil but not your oil filter??? why bother??