cmysix

iTrader: (2)

Well it lives! just finished up this AM and started it. Started like nothing had been done, C6 Corvettes have the ability to shut the fuel off so you can crank the engine with out it starting, pretty much a priming feature. I did that 3 times before letting it start, CLOSE EYES, CROSS FINGERS CLENCH TEETH AND GO! And wala it's running, sounds great! This was a head job, I have done two cams already I like NA, so this was the next step. I used Trick Flows "fast as cast" 220's designed for the LS2. I have found that these heads have as good or better flow #'s as others at a lower lift. not a big fan of lifts in the .600 range, wanted to stay cathedral port also. The hardest part of this job was deciding what push rod length to use, I am using a Crane Cams Roller Rockers set I found years ago, they are adjustable. I have found absolutely no tutorials on how to size the push rod with adjustable rockers, the kit came with 7.250 push rods and Crane had come up with two turns on the adjuster for a preload of .082. with the stock cam it was relatively quiet and ran well. but with the second cam{the one in my sig} it started sounding like a sewing machine, At this time I'm just learning about cam base circle and all that. The cams in so getting that measurement is lost. The new heads were designed for 7.500 push rods so with stock head gasket I would bump the push rods up to 7.350, are you with me so far? So at this point I'm going MAD! after talking to many smarter then myself I decided because my cam doesn't have that high of lift that I should probably go with 7.375 push rods. That's what I did and as near as I can figure? My preload is some where between .090 and .100 which with the new LS7 lifters is as close to perfect as I could hope for, at least the engine sounds that way. I used push rods from POWELL Machine in SC because they were the only ones that said that they kept a .005 tolerance between rods and they were only about $90 a set, Now how much HP do you the heads added to my set-up?AND will I need to retune?

99 Black Bird T/A

iTrader: (4)

Congratulations on the completing the install and getting the car running! With cathedrals and the typical intakes, max middle lift flow is usually an excellent choice

if your in the North or South Carolina area, Mooresville, NC has several shops that should be able to do a good job tuning. I think PCM for Less has a good reputation. Likewise Hawk's Motorsports is in Easley, South Carolina. I've been away from NC for too long to really be up on the details for the tuners but Pray Performance would be a great choice.

bbond105

I would say between 450 and 500whp. I have close to the same set up as you. You didn't state what your compression is or what trans you have. M6 I would think would be closer to 500whp.

NAVYBLUE210

I am going to guess 455 RWHP on the same dyno, picking up 30 with that mild cam with just a head swap would be excellent.
I just picked up a 2007 M6 C6 for my dd and am looking to do some mild upgrades, Slowly over the next 18-24 months,

G Atsma

How do you get it past the smog *****?