Thread: are valve springs needed with hks 272 cams?

Does anyone have a dyno sheet comparing the cossi m2 with the hks 272?

Quote: Originally Posted by moevo9 the reason that i want to go with the hks is on the ams cam test thread it showed the least amount of low end power loss. i no that no matter what i will loose some but i dont want to loose that much since it will be a dd. thanks for all the help. Well that is true cams are basically designed to more your power around the power band. My thing is I didn't want to keep my HKS in there and have the power...

Correct. The lobe profiles of all HKS grinds are mild, and are intended to be compatible with the factory valvetrain. The tradeoff is some degree of spool response and power. It's just the price of convenience.

The real problem with the factory valve springs is not just the rate at which they compress which is relatively soft, but the much higher chance of coil blinding and float type conditions that are associated with following aggressive camshaft lobe profiles. Then there are the spring retainers which are another subject altogether. So as you can notice its more of a continue at your own risk kind of situation without doing the valve spring and...

Quote: Originally Posted by danameisoj any of the hks cams will be fine for factory valvetrain. They only change the duration not the lift so it doesnt put any more strain on the valvetrain. I run hks 280's on stock head . everything is A - OK! Well, I think if the degree is more aggressive, the valves will have to go down faster and thus upgraded valvesprings are required? (I'm not sure, just throwing it out there)

just get head studs, but i bet you allready knew. im running hks cams for almost 60k miles...272/272

there is some true and false info on this thread so to clear up... regarding the HKS 272 mivec cams. 1) The Duration is what is the most significant change on these 272 cams 2) The Lift is MILD, but it IS higher than stock. It is 10.8mm INT and 10.2 EXH (stock is 10.0 and 9.8 -ish) 3) Stock springs/retainers are fine up to 8000rpm (this goes for both the 272 and the 280(Evo8 only) versions since both have the same LIFT. 4) The HKS 272 will...

as long as you dont go passed like 8k rpms you should be ok with any aftermarket cam but the valve springs add insurance. i have stock springs with my kelford 272's and it is fine right now. my tuner said i will be fine as long as i dont go above 8k.

If you have the money get the buschur springs/ retainers, good price and reliability for high rpms

Quote: Originally Posted by DBallz If your going to running a FP Red on an IX then you would suggest you go with cams bigger then HKS. I would suggest Kelford 272's, Cossi M2's, or GSC S2's to really wake that turbo up. If I would have kept my HKS 272's in the car I would have made about 30 less HP. I would suggest you red up on cams before committing to HKS's. Ams Evo Cam Test You probably wouldn't lose 30hp...