How about these cam specs

[Z'06]

Are new retainers needed with the springs? I noticed some kits have them, some don't.

Nope. Just get some hardened pushrods.

[pl4yboy]

I cant believe no one has said anything about your gears... 3.73s with 36" tall tires? No wonder the thing is a dog. Hell, a light headwind would bog that bitch down.

[TXsilverado]

true, get a 4.56 in there with that big of a tire.

the idle difference between a 116 and 114 would be little to none with durations that small. i would step it down to a 112 or 113 to put the power lower. with a good tune, drivability will be as good as stock.

[oleshifty]

4.56 is ordered...goes in next week.


Sad part, I raced my buddies 04 gmc with a 5.3 and exhaust (no tune/intake) I had him by 1/2 a car off the line til about 30, then i pulled about 2 cars on him, until about 60, when i pulled another car or so, and we let off.

[oleshifty]

I'm slightly curious what LSA does for a cam....I always thought it was about lift and duration

[Z'06]

I'm slightly curious what LSA does for a cam....I always thought it was about lift and duration

LSA shifts the curve of the power band. All else equal, a cam with a lower (tighter) LSA falls off sooner in higher RPMs (in other words, it is peakier) than the otherwise identical cam with a higher (wider) LSA. A lower LSA can provide more power earlier in the RPM range. Scroll down to the discussion of LSA on this link.

[oleshifty]

Was looking at texas speed...found these two cams (cam/pushrods/pac springs are about $100 cheaper with texas speed then with VHP)



Texas Speed 220/220 .581/.581 LSA 112*

Texas Speed 224/224 .581/.581 LSA 112*




Either of these look better then the 210/218 .551 / .551 LSA 114* I posted earlier?

[Z'06]

Was looking at texas speed...found these two cams (cam/pushrods/pac springs are about $100 cheaper with texas speed then with VHP)



Texas Speed 220/220 .581/.581 LSA 112*

Texas Speed 224/224 .581/.581 LSA 112*




Either of these look better then the 210/218 .551 / .551 LSA 114* I posted earlier?

Between the two, the TSP220-112 would be all I would want on a daily driver, heavy, lifted 5.3L truck. The TSP220-112 is a more aggressive version of the tried and true TR220-112 (Thunder Racing) I'm installing in mine, and the TSP's higher lift will take better advantage of the ported heads you are planning to run, whereas the stock heads supposedly don't benefit much from cams north of .550. I'd strongly consider the TR224-112 or TSP224-112 for a 6.0L.

These TSP cams just shift the power band up to where the stock stall is no longer relevant. Whereas you could get away with keeping your stock stall with the 210/218 .551/.551 114, you would want to look at a 3K+ stall for the 220 and more like a 3600+ stall for the 224. Shift it too high and you will lose some of the bottom end off-the-line torque our heavy trucks need.

[oleshifty]

hmm ok. So sticking with VHP cam then. I DO NOT want a hi stall in the truck. Have had them before, make way to much noise, waste too much gas, unless it is purely a race truck...I don't see the point.


my buddy has a 11 sec N/A z28 with a 3k stall, that thing is SO annoying to drive, unless you're WOT, then it's 'i just came'

[oleshifty]

if I go with the VHP cam., pac 1218s...what pushrods would be recommended? (i need stock length with that cam)...VHP sells them for 130 for the set. Figured i'd shop around before buying those


He also recommended the dual spring setup over a single spring incase one breaks, there is some backup instead of destroying the motor. I don't think that'll really be an issue with the way this motor is used.