raceme

Hey guys i need help choosing/recommending a cam that will pass Ca smog but make power through the stock exhaust manifolds. Ive read plenty of threads on what will work and wht ive come up with is
1.cheaTR series
2.tr224(passes smog but not recommended w/stock mani)
3.i forget the specs but i think its an eps 218/230(not sure if it smoggable though)
Keep in mind ill be using ported 241s. I want to use a cam that would be considered an upgrade from the later yr ls6 cam.

mark21742

I hope someone else will chime in, but if I remember right for CA you need -4 degrees of overlap or more to pass the sniffer test, so since you would be stuck with your stock mannies you will probably want about 10 degrees more exhaust duration compared to your intake duration, with that in mine you can go with the largest can that will fit that profile....I think one if not more of the hot cams fit that spec....have to run it on a calculator, but something like a 220/230 .600/.600 114-116 lsa would probably get you there.

But also check the new updated emission laws for CA, because I know they were changing to actually be easier to pass with bigger mods. There is a thread in here somewhere in the past month about it.

Remember its a pita, but you could get your manifolds ported too to help out a little

raceme

I found this on sdparts. Would this work for my application? Im looking for 400rwtq if possible with excellent mid range
LS1 ASA, 226/236 Duration @ 0.050, Hydraulic Roller Cam

mark21742

The ASA cam comes in a 110lsa would never pass the sniffer....unless you know somebody.

raceme

Thanks mark after rereading some threads on the cheatrv3 im Pretty sure this is the cam im after

mark21742

I'm just glad we don't have emission law here like you guys do over there I swear your state is insane lol

99Bluz28

iTrader: (35)

How much cam lift are you willing to go with, .615" okay?

EPS TT2 is good, 218/226 113lsa, it has -4* overlap.
http://www.engpwrsys.com/index.php?a...od&productId=5

B0dyDr0pp3d

iTrader: (4)

So would a tuned Comp Cam 224/224 .581 112LSA XE-R Lobes be able to pass the sniffer? Is it the LSA that would make it difficult to pass?

99Bluz28

iTrader: (35)

No, it's the amount of ext/int. valve overlap that determines that.
That 224/224 112lsa probably wouldn't because it has 0* overlap, now a 220/220 112lsa would because of the -4* overlap.

christiandoy

iTrader: (1)

could you let me know how those ported 241s work for you ?
PM me the numbers after you get them tested =)

99Bluz28

iTrader: (35)

Now that doesn't mean yours won't pass 0* overlap, it just means that possibility of it passing is less likely.
Know you could go with a TSP 224/228 cam, can get it with a 115lsa since it has -4* overlap.
http://www.texas-speed.com/p-1147-te...-camshaft.aspx

mark21742

If you look at the new ls9 it has like a 120-122lsa....so you could go with a wider lsa and more duration....but I'm not sure when you stop seeing gains and start hurting performance.

Darkman

iTrader: (2)

https://ls1tech.com/forums/generatio...s-reprise.html

https://ls1tech.com/forums/generatio...manifolds.html

raceme

Thanks for the link darkman the first one is where i heard about the eps cam.
Christiandoy the heads will be ported diy style and i havent started yet but theres plenty of threads on the subject with results. Im hoping mine will see similar results as it looks fairly straight forward.

mark21742

Ravens, I did my 241s. I have some pics I can try to dig up of a head slice I used as a guide if you want, just pm me....there is a small dip under the exhaust valve spring seat you have to watch in the port because it can get thin and pop into the coolant port that runs under that spring seat....when you look in the exhaust port you will see what I am talking about