Evo III 16g camshaft choice?

[spooled_u_1st]

Trying to decide on a set of cams for an Evo III 16g. Does anyone have any first hand input on the BC 272 or BC 280 camshafts?

 

[96gstdsm]

I just got the BC 272's in with a big 16g. It definitely smooths out the powerband a lot. But it really just keeps pulling and pulls harder and harder. Very nice feel to them. The stock cams do feel more fun though I think. They hit much harder do to the much shorter powerband. Obviously for over all performance though the bc 272's will yield a good bit more power. They sound pretty nice too. I got a clip somewhere I can try to find.

 

[spooled_u_1st]

What RPM does power start to fall off?

 

[spooled_u_1st]

Also what boost levels are you running?

 

[96gstdsm]

The cams will flow higher than the turbo can. So far I have only been running max 15 psi. I have adjustable cam gears so I am going to play with them a little to bring the powerband down slightly. Want a little quicker spool. Unfortunately BC doesn't make a 264 grind. A 264/272 combo has proven to be a little better for a 16g turbo. If you ever upgrade turbo's than the 272's are definitely a better choice. The turbo probably won't have much air left over 7k I wouldn't think where as the cams will keep going up and up.
Non the less I am very happy with my selection. Also for the 304.99 I bought them or brand new including shipping it can't be beat.

 

[spooled_u_1st]

Did you get the springs and retainers to match?

 

[Black_Bullet]

I think fp1s would work nice w/ a 16g sized turbo... But if you ever plan to go say 20g and up id say youd benefit more from playing with 272s, fp2, 280 etc .

 

[spooled_u_1st]

I'm really leaning on the BC 272's. I'm still up in the air on the springs and retainers.

 

[daren_p]

Springs & retainers aren't required for the BC 272's or any other 272 equiv. out there (other then FP X series). With a 16g sized turbo's both a 264 & 272 set sized cam will net about the same power gains, just where the gains are will be different. The smaller 264 sized will have gain in the low to mid while the 272 sized will have gains in the mid to top end. Overall gain's with a 16g sized turbo seem to work best with a 264/272 combo.

Do you plan on upgrading the turbo in the future? What kind of boost do you plan on running? Even with a 272 cam, you won't be able to hold full boost all the way to the redline once you start running a descent amount of boost as the evoIII isn't large enough to keep up. A 280 cam is pointless on an evoIII sized turbo, where it makes power is after the evoIII is already running out of steam. For a 280 sized cam you would want to be running a "50 trim" sized turbo as a minimum & reving well past the stock 7500 rpm redline.

 

[spooled_u_1st]

Well the 272's it is. I just talked with the guys at Slowboy Racing and ordered a set.

I am planning on running 27 psi on E85 and 22 psi on pump.

 

[Black_Bullet]

I dont think the 16g will be too happy running 27 psi as its way out of its efficiency range, i mean its been done plenty of times and some set ups have even made big power up there but dont expect the turbo to last long unless your talking about 27psi being a track only affair.

 

[daren_p]

If you set your boost at 27 psi, don't be surprised if it won't hold this to redline. Like I mentioned the evoIII won't be able to keep up (though this isn't necessarly a bad thing), it'll probably drop a few psi or maybe abit more depending on what all mods you are running that effect VE. It will probably hold 22 psi to the redline though.

 

[Black_Bullet]

BTW I dont plan on running more than 21psi daily on my 16g and no more than 25 on race gas. The more mods you do to increase the flow of the engine the more the boost will fall on its face the closer you approach redline which is what daren_P was talking about.

Some random threads that are semi related -

http://www.dsmtuners.com/forums/showthread.php?t=233940&highlight=16g+27+psi
http://www.dsmtuners.com/forums/showthread.php?t=181513&highlight=16g+27+psi
http://www.dsmtuners.com/forums/showthread.php?t=92998&highlight=16g+27+psi
http://www.dsmtuners.com/forums/showthread.php?t=113175&highlight=16g+27+psi

 

[96gstdsm]

Did you get the springs and retainers to match?

I went with the BC springs and then some mitsu performance retainers. I guess I didn't need them but I was completely rebuilding the head with everything brand new so figured it would be a little bit more insurance and also if I decide to ever raise the rev limit a little I will be able to.
I am really hoping that with the adjustable cam gears I got that I can move the power band down a little bit so I can get full potential out of it. no sense having power at 8500 when your not going to rev there really.

PS if your looking for some good cam gears I got some skunk 2 ones on ebay for like 150 including shipping for a brand new set.
http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&ih=016&sspagename=STRK%3AMEWN%3AIT&viewitem=&item=260140181820&rd=1

I submitted a best offer for 150 and he accepted.

 

[bostonhatcher]

Well the 272's it is. I just talked with the guys at Slowboy Racing and ordered a set.

I am planning on running 27 psi on E85 and 22 psi on pump.

Did they go on and on about how much of a waste the HKS cams are .

 

[Black_Bullet]

Yea the cam gears will help you tune overlap and adjust the powerband to where you like it while possibly giving back some of the loss of low end grunt due to the camshafts.
The cam gears could require a good amount of money/ time on the dyno to get just right though.