What cams idle better?

[91-gsx]

I was looking at 272 equivalents or better. I was just wondering which one, if any, might idle better with the stock cam gears. I have seen Crower's equivalent to 272's, BC 272's(they are on back order almost everywhere), Comp 200's. Just wondering if somebody has heard their car with cams maybe next to somebody with something similar but not the same and noticed and idle difference?
thanks for the help

 

[paper_clip_boy]

FP3x's have the best idle in the world.












If you like to sound like a cammed Corvette.

 

[DSMunknown]

I was looking at 272 equivalents or better. I was just wondering which one, if any, might idle better with the stock cam gears. I have seen Crower's equivalent to 272's, BC 272's(they are on back order almost everywhere), Comp 200's. Just wondering if somebody has heard their car with cams maybe next to somebody with something similar but not the same and noticed and idle difference?
thanks for the help

I always keep in mind what ShapeGSX said here when discussing upgraded camshafts (with an emphasis on smooth idle).

 

[SBR Joe]

I was looking at 272 equivalents or better. I was just wondering which one, if any, might idle better with the stock cam gears. I have seen Crower's equivalent to 272's, BC 272's(they are on back order almost everywhere), Comp 200's. Just wondering if somebody has heard their car with cams maybe next to somebody with something similar but not the same and noticed and idle difference?
thanks for the help

Comp 101200's .... Just take my word for it.



Joe
SBR

 

[daren_p]

My FP1X cams sound fairly stock, unless you have a stock cammed car to compare it too. They have the lift of the origional FP2's (slightly more then HKS 272's), & an increased ramp rate. They recommend upgraded springs/retainers to run these but was told you could run them if you had fairly new stockers & weren't reving above the factory redline. These were supposed to be the best choice as far as emissions & idle goes compared to FP's "std" series of cams. I have found that they create so much additional cylinder pressure that they like to cause knock on pump gas. Meth injection will take of that issue though

As a side note, Comp 200's or FP2's sound fairly stock as well.

 

[91-gsx]

Comp 101200's .... Just take my word for it.



Joe
SBR

I heard they work with the stock valve train like the BC's. Is this right? I'm looking to shift right above 8000rpm, maybe 8200.
thanks for the help

 

[dsm-onster]

Shape is a good guy. I don't know about the idle thing. Seams like he was talking about the note. BUT, the idle being consistant and doable at 750 rpms has been reported by many w/ HKS 272s

I have FP2Xs (like comp 101400s). I can idle at lower than 750 rpms and the idle can't be differentiated from stock unless you have a stock engine idling beside it. . . Then you hear the lower agressive "wop, wop, wop, wop, wop". FP2Xshave a little more duration. They also have more ramp rate. So this causes the late closing of the valves to have a more pronounced effect on the overlapping event. Overlap is what kills idle not as much as duration. It's jsut really difficult to get the proper duration for the proper centerline at the desired rpm for peak VE w/ out having significant enough overlap to have the infamous lope. That's why higher duration cams usually exhibit lopey idles.

Nevertheless, I have great idle qualities w/ my more aggresive cams and others w/ hks 272s from my sight and research and what i've heard don't really complain.

As for springs. I've run Manley singles for tens of thousands of mile on the accelerated ramp rates of the 2Xs to an 8500 rpm rev limit. FP used to state that their dual springs are recommended. But now I see that they state that tey are required. I still have seen no problems . . . No valve float. I know HKS 272s can go this high on stock springs.

 

[SBR Joe]

I heard they work with the stock valve train like the BC's. Is this right? I'm looking to shift right above 8000rpm, maybe 8200.
thanks for the help

Correct. I have put these cams in..ehh, 6-7 cars. All with stock valve train shifting at 7500-8000 consistintly. Any higher i would go with a S&R kit.



Joe
SBR

 

[91-gsx]

I'm not sure if anybody has the BC 272's in stock. I am stuck between the BC 272's, comp 200's, and the forced performance stage 2 cams without the X. Which would be better fit for a sc6152 with a .63 a/r exhaust housing? I read that the comp cams and forced performance cams actually have more top end then the 272's, is this true? I also read that the forced performance stage 2 cams are based on the comp 200's, they cost less and forced performance is a great shop. Basically I am shopping for cams that don't have a crazy idle because I have cali smog . I love the sound of aggressive cams, but as smog officials don't. So the big question is, should I wait for the BC 272's to come back maybe in April or something, or should I go with the forced performance stage 2's, or the comp cams 200's? I am open for other suggestions, but I want to keep the stock valve-train.
Thanks for the help

Edit: Also any info on the idle quality and power of the DKS cams would be cool if somebody has any first hand info.

 

[Boosted98gsx]

FP3's:

http://smg.photobucket.com/albums/v448/Boosted98gsx/?action=view&current=MOV00600.flv

 

[blcknspo0ln]

FP2's idle like stock..

I hate it. I'm more partial to the lumpity lump, oh well.

http://www.dsmtuners.com/forums/showthread.php?t=251941

 

[vintagemuscle]

Edit: Also any info on the idle quality and power of the DKS cams would be cool if somebody has any first hand info.

DKS 272's have quite a lumpy idle to them. I can't really give you any info on the power difference as I was using them with a 14b, but I did lose some lowend which was to be expected. I'll see how they work here in the next couple days with the new T61.

 

[91-gsx]

FP2's idle like stock..

I hate it. I'm more partial to the lumpity lump, oh well.

http://www.dsmtuners.com/forums/showthread.php?t=251941

So those make more top end power then 272's, but sound like that... They are soo smooth. 900rpm idle right? Those just might be the ones I go with. How well do they pull to whatever your redline is? The FP3's sound nice, but I want to stick to the stock valve-train.
Thanks for the help

 

[91-gsx]

So I went ahead and ordered as set of BC 272's for $315 shipped. They should be here by the end of the month or so. Thanks for the help and I hope these complement the sc6152 and stock intake manifold? The stock intake manifold starts to drop off in flow at about 6600rpms, so the cams should make up for some of it, but I am trying to find a very stock looking after market intake manifold.
Later

 

[Boosted98gsx]

So I went ahead and ordered as set of BC 272's for $315 shipped. They should be here by the end of the month or so. Thanks for the help and I hope these complement the sc6152 and stock intake manifold? The stock intake manifold starts to drop off in flow at about 6600rpms, so the cams should make up for some of it, but I am trying to find a very stock looking after market intake manifold.
Later

Your only option on the "stock looking" intake mani is an extrude honed stock unit.

 

[blcknspo0ln]

IMHO, any non magnus looking intake manifold will look "stock" to the untrained eye. Try the forrester, venom, etc type SMIM that isn't polished as an option too. Nevertheless, boosted is right, an extrude-honed stock intake manifold is your best bet for true "stock" looking.