Stroker2112

I have a new GM 6.0L iron block(LQ4), w/a 4.000in forged Eagle crank, LS6 '02 cam, and LS6 heads (65cc) for my Silverado Engine swap. What size piston(s) should I use if I want a daily driver (NA).?



dgreckel

Mr. Luos

iTrader: (9)

Really depends on what you want your compression to be.

Pistons will be 4.00" bore. That is the bore on the block, so maybe 4.005"
Someone else will chime in I am sure.

Stroker2112

I'd like to know what size dish ( -6cc, -12cc, -29cc, etc...) would work best for the engine (NA) I'm building.....in other words, what size piston would get me in the neighborhood of a 9:1 to 10:1 CR? ...

Mr. Luos

iTrader: (9)

Not 100% accurate, but you can get close.
http://www.c5frc.com/calculators/Com...Calculator.htm

Kounsy

-12cc

Stroker2112

Thanks for the link and -12cc advice! This helps alot, now I just need the rods and an LS6 intake manifold. I plan to have my machine shop put the lower end (402ci) together...and do the top with my brother in-law(certified mechanic). Bsically swapping new stroker into 2000 Silverado (5.3L)...bolting on external parts to new 6.0L. ...want to get 400+ rwhp with NA...but would like to have FI options later.

dg

Stroker2112

Mr. Luos,

Awesome calculator!...thanks again.

dg

GuitsBoy

iTrader: (4)

Any reason you want such low compression and miniscule cam? Big cube motors take a lot more cam and compression than a 346 does.

Mr. Luos

iTrader: (9)

No problem.
I am running 11:1 with -12cc pistons and 62cc chambers. Thinner gasket.

Stroker2112

GuitsBoy,
Thanks for the feedback, I'm considering low compression CR in case I want to add FI later....just not sure what to do with that. As far as the cam goes, the LS6 02 cam has a .055 lift 218exhaust 204 instake....117.5 LSA, I've read that this cam is probably GM's best designed cam ...my truck is a daily driver so I want some streetably manners....what cam would you suggest?...

Stroker2112

GuitsBoy

iTrader: (4)

For a 402, I really think that cam is way to small. I would call some reputable sponsors and talk about a custom blower cam that will handle low compression N/A well before you go FI. I dont think theres any off-the-shelf cam that will suit your needs exactly. Have some shops spec out a cam based on your goals for the car and have them quote you a price. It wont be nearly as cheap as the ls6 cam, but then again it wont run out of breath by 4800 rpm.

Mr. Luos

iTrader: (9)

Two words for the cam....

Ed Curtis

Stroker2112

Good advise....definitely worth investigating more(thanks)...right now I have just about everything I need except the rods, pistons, intake manifold (and now possible a more aggressive cam). Having never done this before, the anticipation is driving me crazy....I'll probably schedule a week off of work to get this done once I have everything ready...I'll provide updates at a later date. Thanks again.



dg