maroon88iroc

Im looking to do some mild performance to my LT1 Buick GN

I am looking at either the CC503 or the 60121 by lunati. This is a street car/DD so Im looking to keep driveability and get best MPG. The car currectly has a 4l60E but I will be doing a T56 swap at the same time as cam swap. Rear gear is 3.73 and car has a nitrous kit.

specs on lunati

http://www.summitracing.com/parts/LUN-60121

CC503

http://www.summitracing.com/parts/CCA-07-503-8/

I will most likely be doing a mail order tune from pcmforless.com after the swap.

One of my good friends ports heads so I might pull the heads off and have him do them and the intake. What head gasket should I look at getting to bump compression up?

always faster

iTrader: (6)

First ovall the link you provide for the cc503 is not good.What it shows is the cc305.
Correct link:
http://www.summitracing.com/parts/CCA-07-503-8/

I would go straight with the cc503.Has proven to be reliable and give good power even with stock head.

Impala gasket to raise your compression.

thehammer69

iTrader: (2)

I like the Lunati cam...

JB_97ws6TA

iTrader: (6)

X2 for Lunati

SS MPSTR

iTrader: (1)

I doubt you'll see that big of difference between the two. Both, when running right in your engine, will put a smile on your face.

BadBlackZee

iTrader: (5)

As stated before, both will perform well. My vote is for the 503 because it is just one of those good 'ol proven cams. Can't really go wrong. I was going to get a 503 for my bolt-on car before I started my 355 build....

And X2 on the impy gaskets...

maroon88iroc

thanks for the replies

JB can you list your mods to get 340 HP? thats where Im wanting to be is right around 330-350 on motor

anyone have any idea how much the impala gaskets help the c/r?

z_speedfreak

iTrader: (3)

+.5

JB_97ws6TA

iTrader: (6)

Lunati 60121, comp 26918 springs, 1.6 rockers, pacesetter longtubes and ORY. I replaced some other stuff while I was in there but shouldn't have gotten any more power out of replacing lifters, pushrods, and running an LT4 HD timing set. This was on stock compression as well

StealthFormula

iTrader: (35)

You won't go wrong with either. I ran the cc503 years back and that was an excellent street cam that really performed well on and off the track. The Lunati cam seems really nice too. Considering your going to get a mailorder tune I would imagine that there are way more files on cam only cc503 cars which would probaly be enough for me to choose that cam over the Lunati. Again, either way you can't go wrong. Just to add to the confusion you could also consider the GM846 which is a 222/230 .543/.563 on a 112 (1.6 RR's).

CamaroRacing12

iTrader: (5)

ahhhh all these cam threads r making me want to throw a cam in my car and ditch bolt on onlyyyyyyyyyyy

maroon88iroc

do you have expirience with the GM846? I was looking at it but kinda norrowed it out b/c I read on here that it was comparable to the CC306 cam which most say will need head upgrades, im not positive if Im going to go through the trouble of pulling my heads just yet. I have to replace the front timing cover seal and I just figured while I was in there id do a cam, and new timing set. but you make a good point able the mail order there are far more people running the CC503 it seems like so most tuners will be more familiar with that setup. who do you reccomend for the mail order, I was just gonna go with pcmforless but also so

speedfreak - I should still be able to run regular with that little bit of bump in compression?

JB were those dyno #'s through a T56? you probably had a dyno tune with those #'s correct?

thanks again guys for the replies. heres a couple quick pics of the car its going in, kinda more of a show car but Id like to get a little more power out of it since moving its big 3800 pound *** down the track isnt working as well as I want it to haha

StealthFormula

iTrader: (35)

Beautiful car!!

Your confusing the GM846 with the GM847. The 847 is comparable to the cc306 but the 846 is very comparable to the two other cams your are looking at.

As for tuning I have had very good luck with PCMforless so I would recommend them.

z_speedfreak

iTrader: (3)

what a beautiful g-body makes me miss my old black aerocoupe which was my first car.. should of never sold it
anyways on the grade, I wouldn't even run reg stock never mind being cammed. but its the dynamic compression that dictates what fuel you need anyways. theres people running 12:1 on pump gas, it all depends on your set up. imo it would be smart to both bump up your compression and to have it tuned for 93 when you get it tuned after the work.

JB_97ws6TA

iTrader: (6)

Those numbers were through a stalled auto