artec12

Hello!

As the topic title describes I am thinking of upgrading my retainers to supertech since the stock ones are prone to crakging. My question is can i use the oem springs and AP1 keepers or not? If yes should I replace my keepers with new ones?

Thanks!

cdelena

Might be a risk to use those but using AP2 retainers is a proven solution.

afzan

Ap2 are proven to last. Supertech arent

Slowcrash_101

To say they're prone to cracking is not true. Under normal circumstances AP1 retainers will go the distance. AP2 design is better, but it's still not a good idea to mechanically over-rev the engine. The weakness is the valve springs, they're only good for 9,400 rpm max. After that you start experiencing valve float which can easily lead to bent valves and other problems. If you plan to keep OEM rev limits, then OEM is the only proven reliable way to go, anything else is a gamble.

Billman250

Supertech retainers are not an upgrade. Use ap2 retainers and keepers and do it right the first time.

s2000ellier

Ferrea is the only aftermarket maker i'd use.

artec12

If the supertech retainers are somewhat reliable I was thinking to go supertech, and upgrade my springs too at some point for light turbo or higher revs (?) What do you think?

Billman250

With every single RPM above 9k, the engine reliability takes a drastic drop.

Why would you want something somewhat reliable, when AP2 retainers are indestructible.

artec12

You have a strong point there

Slowcrash_101

A small turbo will actually shift the power band to lower revs. Trust me, the engine doesn't need to rev any higher. Do yourself a favor, spare yourself the headaches, stick to OEM in the engine. You can use whatever you want elsewhere, but unless you're willing to spend money you really can't improve the oem engine.