Jake Wade

2006 Silverado, 5.3, 3.81 bore, 5100 lbs, 3.73 gear, 31” tire, 4L60E, 706 heads with 2.00 intake valves with mild bowl blend, 9.66 CR(measured), long tube headers, 3” single cat back.

209/213 111+2
IVO -4.5
IVC 33.5
EVO 39.5
EVC -6.5
Overlap -11

Where would this camshaft peak HP?
Would it carry past peak? Or drop off like a rock? Strong bottom/mid range?

Daily driver truck, focus on low/mid range, strong mid range, not interested in above 6000 rpm, never going there. Would like to see peak HP 5600-5700, carry 200-300.

Main focus is low/mid, good drive ability, and little bit of exhaust note. Pulls hard when shifts down to 2nd at 3800 rpm from a 55 mph cruise.

On the right track?

Thanks

bthomas

iTrader: (1)

You’re in the ballpark. You may get a few suggestions to tweak here/there, but that would do what you’re looking for.

68Formula

Honestly the BTR Truck Torque 202/202 111+2 pretty much meets your criteria. It has a 31* IVC, and with a TBSS intake it peaks and stays flat 5600-5900rpm (even with .511" lift) yet still carries past 6k (with headers). Lots of low end/mid-range. It only lacks the exhaust note due to the -20* overlap.

I think if you wanted to do something custom, probably a 204/212 110+2 on .553 lift. With a 30* IVC and -12* overlap it should peak about the same, and still carry past 6k. Low end same with maybe a little more mid-range. Still good vacuum, great driveability, with mild lope @ 600rpm.

Jake Wade

Great feedback guys! I have three of these trucks. One for myself and two for my sons. All have small camshafts, exhaust, and tune.
I built this particular engine and installed a 206/210 115+5.
It is a great camshaft and performs as it was designed. My son has been driving this combo for about 5 years now and he wants some more sound. I guess the performance bug has bit him.

Dad is trying to look out for him and come up with a grind that will not kill his drive ability, yet give him some sound and MAYBE some more punch without over camming.

Good father/son project. He is always eager to help me in the shop. Makes me proud.

Jake Wade

204/212 110+2

IVO -6
IVC 30
EVO 38
EVC -6
Overlap -12

This looks good. Food for thought. Thank you.

I have spent HOURS reading some of the archives here on this site from people like Martin, Darth, PatG, 93Pony, PREDATORz, JRod, Jakefusion, and many others. Don’t see them here anymore.

Anyways, when I saw the -6 IVO and the -6 EVC, it reminded me what I had read about balanced overlap from posters on this forum.

bthomas

iTrader: (1)

Given this update, I’d say any of the shelf 212/218 grinds would be perfect for him.

Jake Wade

I really like the camshaft 68formula posted.
I think the 30 IVC matches the 9.66 CR and should make the truck pretty spirited off idle with good throttle response.

I had these heads flowed (on a 4.00 bore). 2.00 intake valves in place of the 1.89 and bowls blended. The intake to exhaust is 78% at .500, no pipe.

Everything I have read says that heads with ratios like this do not need a split duration cam.

So, in order to get a single pattern camshaft in the -12 overlap range, one would have to move up to a 208/208 110, or a 212/212 on a 112.
All the while moving the valve events around and most likely the power band up. All I know is that the 204/212 110+2 events look pretty good to have a 8 degree split.

I probably am putting WAY too much thought into this for such a mild application. I just thought it would be good discussion.

Thanks for listening

CGumina

For some consideration: the Scoggin Dickey LS6 PowerMax cam might be a good fit, if you're looking for a little more power upstairs without ruining drivability. Has a little more rump-rump in the idle without going too nuts, and has lift and duration that will help carry things out a little further. You'd have to put in some valve springs, but LS6 springs are affordable and plentiful.

204/222 @0.050, 0.551/0.570 lift, 112LSA.

Jake Wade

Yes, that Power Max cam is right in that -11 to -12 overlap range. Looks like it would pull good on the top end.

stockA4

The powermax is the one to get, I have a 2004 suburban 4x4 4.10's. with a 5.3L

I rebuilt this 5.3 with flat top pistons so the CR is about 10.5:1 with stock untouched 706 heads. the power max is the perfect cam for this app. It absolutely screams to 6k. I have the BTR stage 3 truck in there before 218/224 113+3 and it was awesome but the power max is a much better fit

Jake Wade

Thank you stockA4, that is some really good feedback.

stockA4

I appreciate that, I'll tell you, I started with the SBC, moved on to the Gen 2 LT1, been playing with the gen 3s since they came out, now over the years I've tried lots of different cams, Lots of smaller cams different displacements, compression ratios, etc, I'm always learning something new, imo If you were going to spend a little more call comp and get a custom grind I would even consider something smaller than 204 ° intake duration as your 5.3 doesn't really need those 2" intake valves to breathe, I'd save those for a 5.7L or larger bottom end