garygnu

what head do you have?any porting?maybe a smaller EPS cam.

BruceBufferTA

iTrader: (1)

Do all the neither responses make you want to curl up in a ball and cry? Get over it girly man.

OP, steer clear of both and get a custom cam.

VerdeZ28

i dont think it could.

the heads im going to run are 243 (off z06) milled 0.030" with some pocket porting done
with comp 918 springs and titanium retainers

HioSSilver

iTrader: (8)

It would be close with the 243's....My ls6 make 413 so it most definitly could. The ls6 bottem end is a bit more efficient. Drivability and milage would be top notch.

WS6tx

iTrader: (25)

my choice would be the 228/230 cam. Either cam though would get you to your goal. Good luck with your decision.

A.R. Shale Targa

iTrader: (2)

Both of the cams he's lookin' at would work similar as the numbers are so
close that it's splittin' hairs, however the reason people are suggesting to
go custom (EPS) and particularly with 8degrees more on the exhaust is
because unlike your cnc heads which flow about 80% exhaust to intake
ratio where as the unported 243s he's running flow between 66 and 70%
E to I ratio. Again its not that the 243 ex port is terrible but rather the
intake is so good for a production casting that this ratio is on the low side
and more exhaust timing would just help. Plus several people are making
excellant power with some of the newer lobe technology

poltergeist 02

iTrader: (65)

Look at my sig for my #s the xr281 needs good tuning for an auto. I'm posting this from my cell phone so I can't see if you have an m6 or a4. If it's an auto your going to want a good converter for this cam.

VerdeZ28

I would like to hear from people who run these cams or similar ones

Also i was wondering if I would have any piston to valve clearance issues with the comp cam. remember they will be going in with milled 243s (0.030")

redtail2426

iTrader: (10)

i have 243 heads with my cam 228/230 571/573 112.My 243's have stock sized valves,they are milled .018 and i am using a cometic .045 gasket.My setup would be pretty much the same as milling .030 and using a stock mls gasket.My PTV clearance on my intake was .085 and exhaust was .110.The exhaust might have been .120.I just know i had enough clearance.I have it written down in a file i can double check it later

speed_demon24

iTrader: (6)

I still vote for something in the low 220's high 210's for a daily driver. Cam surge and shitty millage around town gets old.

Exidous

iTrader: (11)

I get almost zero cam surge with a 228/228 .588/.588 114 cam. The shitty city mileage is 100% accurate though. I think my heads have a bit to do with that too though. Stupid oversized runners. :-(

180ls1

iTrader: (4)

both will be very similar, the 226 one sounds suited better for your needs though

redtail2426

iTrader: (10)

Not sure what you guys are talking about with the cam surge and shitty gas mileage.My car gets excellent mileage and pretty much no cam surge.The only time it will surge is if i make it surge.I also spent some good time tuning my car myself,and then switched it over to Speed density.My car runs real smooth now

poltergeist 02

iTrader: (65)

i don't think the cam is to blame for poor gas milage. now my 3600 stall on the other hand and no lock up in third might be the cause of my fuel usage problem. haha

VerdeZ28

so ive been banging my head against the wall with this. can anyone give my an idea how my MPGs will be affected by these cams? right now i average 20mpg a week and i dont think i would like to be less than 15mpg, will this be the case with either of these.

intenseblue

iTrader: (1)

2-3 down city. hwy remains the same. some have reported 1-2 better

whitedevilWS6

iTrader: (10)

i love my XR281. behaves very well and gas mileage is great. i've seen 15 in the city but after my 3.73s my highway mpg record went from 26.5 (<--with 3.42) to 27.45 (if you can believe that)! my mods are in my sig. it's a good cam, man.

smg267

iTrader: (23)

hoping for numbers on the 228 230 cam for you this weekend. still at the tuner.

whitedevilWS6

iTrader: (10)

FYI my previous setup was a bolt on stock engine with LS6 intake and the cheap headers with a COMP XR273HR (220/224 .531/.534 112) and it put down 371rwhp/372rwtq, had torque off idle with a noticeable tq gain around 3k, and drove like stock. never got mpg figures from it but i couldn't tell the difference between bolt ons vs the cam. it was a blast to drive, i'm sure some ported 5.3s would have been awesome with it too. but after seeing my mpg results i'm glad i bumped up the size a bit. but, there's a good option for ya. if you wanna see my dyno sheets i have one for both setups.

f1ctionZ28

awesome man let me know when its done what its like