Time to upgrade cams, any thoughts/suggestions?

**1ViciousGSX** · 01-22-2008

I'm looking to upgrade my HKS 272's. Engine starts to nose over after 7500 rpm at 18-24 psi. More boost will move that nose over higher in the rpm band. But I know at that level my cams are probably the cause. Max rpm for me will be 8500 rpm.

I'm currently running Supertech single springs on the 2.4L set up by Magnus.

I'm currently looking at;

BC280's
BC288's
HKS280's
Jun Stage3's

I know I could look at FP3's/3x's and FP4's, but I don't want to pull the head for new springs at the monent.

Any thoughts, ideas, experience?

**Shane@DBPerformance** · 01-22-2008

Get a bigger intake manifold.

I would try the BC280s, since they are dirt cheap and if they don't work, you can just sell them. The BC288s might cause all kinds of things to smash together at the lifts they have, unless you do some mods to the head.

**JET** · 01-22-2008

I bet you would be fine running those springs on the FP3x at the lower RPM. I think FP is being pretty conservative. Those would be my first choice, followed by the BC288's. I like my Crower 415's, but I think there are better choices out there now. I am running those with Crower springs/retainers and they have been fine to 8,500.

**JET** · 01-22-2008

Good point Shane, do you know if the valve guides were machined down at all?

I found my cam card for the 415's in the move, I will post it tonight.

**1ViciousGSX** · 01-22-2008

Quote:

Originally Posted by ecoli

Get a bigger intake manifold.

Are you serious about the intake? I already have the Magnus 1g SMIM on it.

I don't know about the guides being cut down. I would hope that Magnus did that as part of their stage 3 job, but who knows with out taking the head off and measuring.

I talked with Brian Crower's tech dept today about the springs I have now, the said the 288's would work fine with them.

**Shane@DBPerformance** · 01-22-2008

Is it a normal Magnus? I would think the normal Magnus intakes are best suited for a 2.0l with a turbo smaller than a 61mm.

**1ViciousGSX** · 01-22-2008

Quote:

Originally Posted by ecoli

Is it a normal Magnus? I would think the normal Magnus intakes are best suited for a 2.0l with a turbo smaller than a 61mm.

Yeah, it's the normal one. I have looked into the larger plenum design for my car, but figured it would be more of an "icing on the cake" item vs. a neccessity.

Kevin 1G Drummer · 01-22-2008

If you decide to sell your 272's, let me know. Has anyone seen numbers for the 288's in a 2.4? Seems to me that they would almost be a better choice than 280's, unless there's only a negligable gain.

**1ViciousGSX** · 01-23-2008

Quote:

Originally Posted by Kevin_1G_Drummer

If you decide to sell your 272's, let me know.

Will do.

Pushit2.0 · 01-23-2008

http://www.mitsustyle.com/forums/sho...ight=cam+specs

We have gone over this befor. If you want a sweet SMIM buy the AMS VSR race series, Shep uses it so it has to be good.

~John

**1ViciousGSX** · 01-23-2008

Quote:

Originally Posted by Kevin_1G_Drummer

If you decide to sell your 272's, let me know.

Make an offer as they will be coming out, in a PM please.

Going with the FP4R (not a typo) cams. I talked with Scott at FP and he suggested these. Sounds like they are a version of the FP4 cams with "spring friendly" ramp rates. They are not on the website yet, just went into production. They sound similiar to the HKS 280, BC280, etc.

Speedfreak · 01-23-2008

Quote:

Originally Posted by 1ViciousGSX

Make an offer as they will be coming out, in a PM please.

Going with the FP4R (not a typo) cams. I talked with Scott at FP and he suggested these. Sounds like they are a version of the FP4 cams with "spring friendly" ramp rates. They are not on the website yet, just went into production. They sound similiar to the HKS 280, BC280, etc.

Could you PM me what you'd like to get for the cams? Making an offer is very hard to do on used parts. It comes down to what the seller/owner wants for their parts and if buyers are willing to pay that price.

**asshanson** · 01-23-2008

Oh nice! That's exactly what I've been hoping for. Any idea what the difference between the fp3 and fp4 are, and if they have similar plans for the fp3? Are they both made for strokers?

Not to thread jack, but I'm interested.