joppe

try to run about 400whp with bisi 2.4 cam or something. I was thinking to run with OEM retainers, is that bad idea?

http://www.ebay.com/itm/HONDA-CIVIC-...ht_3196wt_1396

http://bisimoto.com/store/index.php?...roducts_id=220

What is proven for good to 8.5-9krpm?

kbouchard1092

Def bad idea

NonovUrbizniz

You can use stock retainers you just can't expect to rev it as high safely. And it can depend on the design of the spring or the material/design of the stock retainer.

The titanium retainers are more for reduced weight... When there is more mass in the spring/retainer they do not respond as fast at high rpm and you can get valve float.

For a certain answer you should always contact the manufacturer directly.

FarmYard

me and danz both use oem retainers and aftermarket valve springs with the newer (z6 and y series) heads. the oem retainers are only slightly heavier than titanium and very reliable. 3 years of 10 second passes and no issues. 9000rpm+

joppe

What springs you have?

scottdh20

im also running the delta 272-2 (bisi 2.4 equivilent except it wont break in half), crower springs, stock retainers/keepers, 8500 rpms with no problems....

22psi out of an hx35 unknown power