Has anyone looked at the HKS 280s?

 

Those are new on hks's site.

Chris

 

No one makes a 268 cam? That would solve all the problems by being in the middle of 264 and 272.

Also, people state that a brand X cam is better than a brand cam with same lift and duration numbers? Could someone expalin to me how this is possible. Differences could be in quality but I don't see how it could be in performance if the lift and duration is the same in both X and Y brand cams. Please shed some light on this.

 

Advertised duration numbers (e.g. 264, 272, etc.) cannot be compared outside of one manufacturer. Advertised duration numbers mean little. Actual duration (e.g. @1mm lift) numbers are far more useful in predicting the characteristics of a cam. Comparing a 264 duration cam from one maker with a 264 duration cam from another maker is not typically comparing apples and apples.

More goes into cam design than raw lift and duration. Ramp shapes and rates of lift are significant. And finally, the tuning of a cam set with respect to the crankshaft and respect to each other (lobe centers and angle of separation respectively) are also important.

 

Thank you Ted B. Looks like I need to do some reading on the cam FAQs... anyone know of any good ones?

 

I have the 272 cams with the cam gears and I dont have a problem. Idle is like stock, most dont know that I have cams.

 

there's another thread stating that 272 cams exhaust and intake/ with the factory setting at 0 runs like stock oppose to 264's. where you would need cam gears to adjust angle by 2 degrees or so.

 

Why dont you just get the 280 racing cams?? Yea 272/272 were good but 280 is even better!! Thye have better torque and throttle response.

 

not really.

go look at the topspeed comparison vs 272 on 280.

 

Yea I read that on here as well. I think I will go with the 272/272. HKS 280 seem nice but have heard to many people state that you should/might want to upgrade the turbo.

 

Hey, all u guys r awesome for sharing all ur results. I just had a quick off-the-topic question: with the 272/272 cams, would u recommend getting new valve springs and retainers or will stock springs be alright? Thanks for your time! -Ryne

 

It's always advised to change valve springs and retainers when doing internal work like the cams, especially on an older vehicle. Regardless of what kind of vehicle it is. I see yours is a 2003. You may want to go ahead and have them changed while your doing the install. It may save some money in the pocket down the road.
Just a thought.

 

Thanks for the advice. I was planning on getting cams and cam gears in the next month or so, and i guess ill upgrade my valve spings as well. I was thinking of getting some aftermarket springs like crower or arias. Any recommendations?

 

Sorry if its off topic but ....
What do you all think of a 264in/272ex with Crower's single valve spring retainer kit? It would go on a 20k mileage Evo. From what I have read about the dual vs single spring is that with the dual spring if one breaks the other will keep the vavle from bouncing around all over the place causing massive destruction. Definetly worth getting the dual instead of single but if your not reving over stock limits then would I be safe with a single valve?

 

That's not a good reason to get dual springs. First, you shouldn't have valvesprings breaking at all if they are set up correctly. Second, dual springs are actually more likely to have issues than single springs. Sometimes the inner and outer spring can rub and cause problems (like broken springs). Other times the narrow inside diameter of the inner spring can cause clearance issues with the valve seal. And if you have a valvespring break, you are at high risk of having problems with shrapnel in the motor and oil passages. You should only get dual springs if you really need better control of spring harmonics and there isn't a single spring/retainer combo that suits your needs.