93hatch

iTrader: (9)

5.7 LS6 car, just looking to cam it, already have longtubes/no cats/fast intake, will the fuel survive or will I need a set of ls3 injectors?

serik21

As long as it's not a donkey dick size cam you'll be fine. Maybe 60# injectors if it's a big cam

93hatch

iTrader: (9)

no nothing crazy, but figure its a good excuse to do lifters/springs/timing set

would just be something small like 220/230ish

07CTS-V

iTrader: (6)

You'll be fine with stock. I used stock pump and lines with 52# injectors and was good for 525 rwHp.

93hatch

iTrader: (9)

theyre 28 lb injectors stock right? at 58psi?

bmylez

iTrader: (3)

You're not actually planning on lifters, right? Gotta pull the heads for that, and I would not take the time to pull the heads unless a) a lifter was broken or b) upgrading heads.

07CTS-V

iTrader: (6)

My stock injectors were at 90-92% duty cycle with 425/400 on a mustang dyno. Small-ish cam, ported heads, headers and full exhaust on an LS2.

odthetruth

iTrader: (4)

Stock pump itself isn't bad. The wiring isn't exactly great though. If you want to touch and upgrade that pump though, don't overlook the racetronix harness. One of the best things I've picked up after my walboro 255 upgrade.

I have not 1, not 2, but 3 spare CTS-V stock fuel pumps. If anyone needs one, just lmk.

93hatch

iTrader: (9)

I know, but doing the springs with the heads on sucks anyway

bmylez

iTrader: (3)

True, but 12-14 hours to pull the heads vs. maybe 3 hours doing valve springs with them on? I just don't see the labor benefit without putting some ported heads on.

odthetruth

iTrader: (4)

Amen.

93hatch

iTrader: (9)

It would only be an extra 2-3 hours worth of work for me, not paying a shop to do it

bmylez

iTrader: (3)

So you're saying you can pull the heads, do valve springs, and re-install heads in 5-6 hours?

Becker

iTrader: (4)

spring change on this motor isnt that bad, well comparing to an f-body that hides two cylinders from you.

I agree with the others that you should upgrade heads if your pulling them.

93hatch

iTrader: (9)

2-3 hours extra to pull them and do the springs on a bench vs doing them in the car

07CTS-V

iTrader: (6)

I wouldn't waste my time pulling the heads if it were only to make it easier to swap springs. I find it harder to swap them on the bench. Buy this tool and use an air compressor to hold the valves up.

http://m.summitracing.com/parts/tfs-90306

NIKDSC5

iTrader: (10)

Where did you get those #'s?

Thatta boy!

Does that really seem all that difficult to people? It ain't hard to pull heads. Most time consuming part would be cleaning the surfaces. Plus how many miles are you on OP? Lifters are cheap, so changing them as a preventative maintenance makes sense.


If you decide not to pull heads then this^ that tool is amazing. With air, I can swap all springs on an LS in the car in under an hour.

Good luck sir

LeanPocket

iTrader: (6)

Wouldnt be a good idea to change the lifters on a high mileage v? when doing a cam swap.

I was under the impression these stock lifters were the weak link on the ls1/2/6 motors

93hatch

iTrader: (9)

Ctsv lifter is better than a regular ls6 lifter correct? Or is that only for the lsa motor

bmylez

iTrader: (3)

Some people may be able to do it faster, but from what I've seen, the first couple times aren't going to be quick. Looks like Brian agrees with me anyway . But if OP is experienced with pulling heads and doesn't mind the extra labor, more power to him.

Also, I didn't think the CTS-V got special LS6 lifters. I know some LS6 valve train components were updated in '01 or '02, and that's what the V would have.