HKS 272's or FP Cam3X?

[Slow95gsx]

Whats your thoughts on this? Mods are current in my vehicle profile. Car is revving to 8500-9k.

 

[TSIfreek]

Both are great cams so you really cant go wront with eather one. The FP3X are a more agressive cam with more technogy in it. I would go with the 3X personally.

 

[TSIMonsteR]

FP 2x is where I'd go, but 3x over the 272's

 

[Rick@AP]

They aren't comparable. The FP3x is quite larger than the 272's. I would only use that cam on a stroker motor or a VERY high revving engine.

 

[Maglin]

Well your profile says you have 272's currently. I was going to go with the FP3x's untill recently. I want more cam, but I also don't plan to ever really drive the car on the street except to get to an event. I'm looking at going with the BC 280's.

The FP3x has a little more life than the BC280's, but the BC280's have a longer duration. With the FP Dual Springs and wanting only to rev to 9K either cam will give about the same results. The BC cam might have a little more bottem end due to the increased volicity cause of the valve not opening as much. With the slightly longer duration it's pretty much going to be close to the same airflow numbers.

I plan to use the FP duel springs cause they have to most open pressures along with the BC280's cause of their slightly lower valve lift. I plan to run up to 10,500 RPMS and that combination would prove adiquete to ensure no valve float. Hope that maybe helps you out some.

 

[Byrd]

Maglin - i'm very happy to see you just posted about the BC280's.

I'd personally go 3x's over 272's and BC280's over them all. With 3x's that means you will also have to get the FP dual springs because they are said to be the only spring to put 280psi over the knose (there's another thread on this).

I'm building a 2.4L so i wouldn't be revving as high as you maglin. Probably 7.5K. So i would like to hear an honest opinion - Should i go with there single springs that they sell on there site? or go with duals. I know on the safe side i should go duals but can i get away with singles when not reving high with the 280's?!

 

[Slow95gsx]

Oh yeah, I am currently running the FP Dual Valve Springs... I thought they were in my vehicle profile..guess not.

 

[Maglin]

IF I remember correctly duel valve springs help with valve harmonics as their is more spring area to absorb valve vibrations. I would go dual valve springs.

I did see you had FP duals but I just worded my post towards using the FP Duals and the reasoning for it. So you have the right springs IMO.

The one thing you will want to maximize power output with the BC280's are a set of adjustable cam gears. Preferabily the Fidenza 5 bolt ones. I know the OP has them but just letting others know. That way if the cam is ground slightly off center you can degree it to be straight up. You can sometimes pick up a bit of power by retarding the exhaust cam a tad and advance the intake some. A dyno is best for this. For the intake cam you can use a compression gauge to get the best compression numbers and you will have a very good starting point to fine tune the intake cam. The exhaust cam I just kept at 0* and run it. Get the intake to the point of max power on the dyno then start with the exhaust. It will take about 2 hours to do this as you will want to let the IC cool down between every 2 pulls for sure. Just a warning that you might end up with a very loppy idle by doing this. I usually have my cars idle at around 1K and sometimes 1300 to compensate for low vacuum from a lot of valve overlap but top end will shine and depending on how your intake ports are "Ported" mid range will still be very snappy.

 

[95blackGsTurbo]

I personally favor the DKS 272 cams for the price. Ordered some and put them on our machine at work to test them for any air bubble's or imperfections and found none. As well as the machining was perfect. Just like they had been ground from a blank cam.

 

[WRX19]

We need to know more about your setup honestly...The FP3x is probably too aggressive for your setup. Like stated earlier it's geared towards the stroker and 2.4 motors.

272 (or FP's equivalent but a tad more aggressive) the FP2 can take you a long way. But up to 9k maybe take a look at the FP3's

 

[Slow95gsx]

What else do you need to know? Aem Ems, PTE 1000's, GT3582r, VP Manifold, JMFab Smim, Crower/Ross, FP Dual valve springs, shooting for 8500-9k rpms.